This page is identical in scope to Pages in Category:Astronomy (1/2), except that it omits #Redirects. Compiled: 14:30, 17 December 2020 (UTC).
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List compiled 14:30, 17 December 2019 (UTC)
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List
edit- $50SAT
- '39
- 'Abd al-'Aziz al-Wafa'i
- 'Amm
- 'Til Death Do Us Part (Star Trek: Deep Space Nine)
- 'Tis the Voice of the Lobster
- 's Nachts
- 't Hooft–Polyakov monopole
- (10115) 1992 SK
- (101429) 1998 VF31
- (101869) 1999 MM
- (10302) 1989 ML
- (111253) 2001 XU10
- (11395) 1998 XN77
- (11436) 1969 QR
- (11474) 1982 SM2
- (118228) 1996 TQ66
- (118378) 1999 HT11
- (119070) 2001 KP77
- (119951) 2002 KX14
- (119979) 2002 WC19
- (120132) 2003 FY128
- (120178) 2003 OP32
- (120216) 2004 EW95
- (120348) 2004 TY364
- (121514) 1999 UJ7
- (12538) 1998 OH
- (126154) 2001 YH140
- (126155) 2001 YJ140
- (127546) 2002 XU93
- (12929) 1999 TZ1
- (131696) 2001 XT254
- (131697) 2001 XH255
- (13366) 1998 US24
- (136617) 1994 CC
- (137108) 1999 AN10
- (137427) 1999 TF211
- (137924) 2000 BD19
- (139775) 2001 QG298
- (143649) 2003 QQ47
- (143651) 2003 QO104
- (144897) 2004 UX10
- (144898) 2004 VD17
- (144908) 2004 YH32
- (145451) 2005 RM43
- (145452) 2005 RN43
- (145453) 2005 RR43
- (145480) 2005 TB190
- (148209) 2000 CR105
- (148975) 2001 XA255
- (152680) 1998 KJ9
- (153201) 2000 WO107
- (153591) 2001 SN263
- (153814) 2001 WN5
- (154276) 2002 SY50
- (15430) 1998 UR31
- (15436) 1998 VU30
- (15440) 1998 WX4
- (15502) 1999 NV27
- (15692) 1984 RA
- (15700) 1987 QD
- (15788) 1993 SB
- (15789) 1993 SC
- (15807) 1994 GV9
- (15820) 1994 TB
- (15874) 1996 TL66
- (15875) 1996 TP66
- (15977) 1998 MA11
- (159857) 2004 LJ1
- (16070) 1999 RB101
- (162058) 1997 AE12
- (162421) 2000 ET70
- (163132) 2002 CU11
- (163243) 2002 FB3
- (163249) 2002 GT
- (163348) 2002 NN4
- (163364) 2002 OD20
- (163899) 2003 SD220
- (164121) 2003 YT1
- (164207) 2004 GU9
- (16882) 1998 BO13
- (16960) 1998 QS52
- (172034) 2001 WR1
- (175113) 2004 PF115
- (175706) 1996 FG3
- (177049) 2003 EE16
- (179806) 2002 TD66
- (181708) 1993 FW
- (181902) 1999 RD215
- (182294) 2001 KU76
- (184212) 2004 PB112
- (185851) 2000 DP107
- (190166) 2005 UP156
- (19255) 1994 VK8
- (192642) 1999 RD32
- (19308) 1996 TO66
- (196256) 2003 EH1
- (2+1)-dimensional topological gravity
- (20161) 1996 TR66
- (202421) 2005 UQ513
- (20729) 1999 XS143
- (208996) 2003 AZ84
- (214869) 2007 PA8
- (21601) 1998 XO89
- (219774) 2001 YY145
- (22149) 2000 WD49
- (225312) 1996 XB27
- (230965) 2004 XA192
- (23135) 2000 AN146
- (237442) 1999 TA10
- (23958) 1998 VD30
- (242450) 2004 QY2
- (24835) 1995 SM55
- (248835) 2006 SX368
- (24952) 1997 QJ4
- (24978) 1998 HJ151
- (251732) 1998 HG49
- (26308) 1998 SM165
- (26375) 1999 DE9
- (275809) 2001 QY297
- (276033) 2002 AJ129
- (277475) 2005 WK4
- (277810) 2006 FV35
- (278361) 2007 JJ43
- (285263) 1998 QE2
- (29075) 1950 DA
- (292220) 2006 SU49
- (300163) 2006 VW139
- (303775) 2005 QU182
- (307261) 2002 MS4
- (307463) 2002 VU130
- (308193) 2005 CB79
- (308242) 2005 GO21
- (308635) 2005 YU55
- (308933) 2006 SQ372
- (309239) 2007 RW10
- (310071) 2010 KR59
- (311999) 2007 NS2
- (31345) 1998 PG
- (315530) 2008 AP129
- (315898) 2008 QD4
- (316179) 2010 EN65
- (31669) 1999 JT6
- (322756) 2001 CK32
- (323137) 2003 BM80
- (32496) 2000 WX182
- (33001) 1997 CU29
- (332446) 2008 AF4
- (33340) 1998 VG44
- (33342) 1998 WT24
- (336756) 2010 NV1
- (341843) 2008 EV5
- (342842) 2008 YB3
- (343158) 2009 HC82
- (34746) 2001 QE91
- (350462) 1998 KG3
- (35396) 1997 XF11
- (35671) 1998 SN165
- (357439) 2004 BL86
- (367789) 2011 AG5
- (369623) 2011 DY5
- (3708) 1974 FV1
- (374158) 2004 UL
- (38050) 1998 VR38
- (38063) 1999 FH
- (385185) 1993 RO
- (385250) 2001 DH47
- (385343) 2002 LV
- (386454) 2008 XM
- (386723) 2009 YE7
- (388188) 2006 DP14
- (38984) 2000 UZ4
- (391211) 2006 HZ51
- (392741) 2012 SQ31
- (394130) 2006 HY51
- (39546) 1992 DT5
- (40314) 1999 KR16
- (4035) 1986 WD
- (410777) 2009 FD
- (415029) 2011 UL21
- (415713) 1998 XX2
- (416151) 2002 RQ25
- (416400) 2003 UZ117
- (417634) 2006 XG1
- (418993) 2009 MS9
- (419624) 2010 SO16
- (42301) 2001 UR163
- (432949) 2012 HH2
- (433953) 1997 XR2
- (434326) 2004 JG6
- (434620) 2005 VD
- (436724) 2011 UW158
- (444004) 2004 AS1
- (444030) 2004 NT33
- (445473) 2010 VZ98
- (44594) 1999 OX3
- (4489) 1988 AK
- (450894) 2008 BT18
- (454101) 2013 BP73
- (455502) 2003 UZ413
- (456938) 2007 YV56
- (457175) 2008 GO98
- (458732) 2011 MD5
- (459883) 2014 JX55
- (467336) 2002 LT38
- (468861) 2013 LU28
- (469306) 1999 CD158
- (469372) 2001 QF298
- (469987) 2006 HJ123
- (470308) 2007 JH43
- (470599) 2008 OG19
- (471240) 2011 BT15
- (471288) 2011 GM27
- (471325) 2011 KT19
- (4715) 1989 TS1
- (472271) 2014 UM33
- (472651) 2015 DB216
- (474640) 2004 VN112
- (480808) 1994 XL1
- (481394) 2006 SF6
- (481482) 2007 CA19
- (48639) 1995 TL8
- (4953) 1990 MU
- (495603) 2015 AM281
- (496315) 2013 GP136
- (501546) 2014 JJ80
- (501581) 2014 OB394
- (501647) 2014 SD224
- (5025) 1986 TS6
- (505448) 2013 SA100
- (505478) 2013 UT15
- (505624) 2014 GU53
- (505657) 2014 SR339
- (506479) 2003 HB57
- (508338) 2015 SO20
- (508869) 2002 VT130
- (511002) 2013 MZ5
- (5119) 1988 RA1
- (516977) 2012 HZ84
- (523622) 2007 TG422
- (523635) 2010 DN93
- (523639) 2010 RE64
- (523643) 2010 TY53
- (523645) 2010 VK201
- (523662) 2012 MU2
- (523671) 2013 FZ27
- (523674) 2013 MA12
- (523683) 2014 CP23
- (523684) 2014 CQ23
- (523687) 2014 DF143
- (523692) 2014 EZ51
- (523702) 2014 HW199
- (523706) 2014 HF200
- (523719) 2014 LM28
- (523727) 2014 NW65
- (523759) 2014 WK509
- (523764) 2014 WC510
- (523775) 2014 YB35
- (523794) 2015 RR245
- (523972) 1999 CW8
- (524366) 2001 XR254
- (524435) 2002 CY248
- (524522) 2002 VE68
- (5258) 1989 AU1
- (52747) 1998 HM151
- (52760) 1998 ML14
- (527603) 2007 VJ305
- (527604) 2007 VL305
- (52768) 1998 OR2
- (528219) 2008 KV42
- (528381) 2008 ST291
- (529366) 2009 WM1
- (532037) 2013 FY27
- (53319) 1999 JM8
- (533560) 2014 JM80
- (5407) 1992 AX
- (543354) 2014 AN55
- (5476) 1989 TO11
- (5496) 1973 NA
- (55565) 2002 AW197
- (55636) 2002 TX300
- (55637) 2002 UX25
- (55638) 2002 VE95
- (5604) 1992 FE
- (5645) 1990 SP
- (5646) 1990 TR
- (5648) 1990 VU1
- (5836) 1993 MF
- (6002) 1988 RO
- (6037) 1988 EG
- (60621) 2000 FE8
- (6090) 1989 DJ
- (6178) 1986 DA
- (6265) 1985 TW3
- (6382) 1988 EL
- (6491) 1991 OA
- (65407) 2002 RP120
- (6545) 1986 TR6
- (66063) 1998 RO1
- (68950) 2002 QF15
- (7025) 1993 QA
- (7335) 1989 JA
- (7341) 1991 VK
- (7348) 1993 FJ22
- (7352) 1994 CO
- (7474) 1992 TC
- (7482) 1994 PC1
- (75482) 1999 XC173
- (7563) 1988 BC
- (7641) 1986 TT6
- (78799) 2002 XW93
- (7888) 1993 UC
- (79983) 1999 DF9
- (8014) 1990 MF
- (8035) 1992 TB
- (8201) 1994 AH2
- (82075) 2000 YW134
- (82158) 2001 FP185
- (84522) 2002 TC302
- (84719) 2002 VR128
- (84922) 2003 VS2
- (85182) 1991 AQ
- (85627) 1998 HP151
- (85633) 1998 KR65
- (85640) 1998 OX4
- (85713) 1998 SS49
- (85770) 1998 UP1
- (85989) 1999 JD6
- (85990) 1999 JV6
- (86039) 1999 NC43
- (86047) 1999 OY3
- (87269) 2000 OO67
- (88710) 2001 SL9
- (89830) 2002 CE
- (89958) 2002 LY45
- (89959) 2002 NT7
- (90075) 2002 VU94
- (90568) 2004 GV9
- (91133) 1998 HK151
- (91205) 1998 US43
- (95625) 2002 GX32
- (9799) 1996 RJ
- (9928) 1981 WE9
- (9942) 1989 TM1
- (9948) 1990 QB2
- (99907) 1989 VA
- (9992) 1997 TG19
- (Every Day Is) Halloween
- (Last Night) I Didn't Get to Sleep at All
- (n-p) reaction
- (−1)F
- +1 (film)
- ...The Heavens and the Earth
- 1 Aquarii
- 1 Arietis
- 1 Aurigae
- 1 Boötis
- 1 Camelopardalis
- 1 Cancri
- 1 Canis Minoris
- 1 Cassiopeiae
- 1 Centauri
- 1 Ceti
- 1 Delphini
- 1 Geminorum
- 1 Lacertae
- 1 Lupi
- 1 Lyncis
- 1 Pegasi
- 1 Persei
- 1 Puppis
- 1 Scorpii
- 1 Serpentis
- 1 Vulpeculae
- 1% (film)
- 1,1,1-Trichloroethane
- 1,1-Dimethyldiborane
- 1-Butanol
- 1-Pentanol
- 1-Propanol
- 1.8KS7800
- 1.9KS2150
- 1/N expansion
- 10 Andromedae
- 10 Aquilae
- 10 Arietis
- 10 Boötis
- 10 Canis Majoris
- 10 Canum Venaticorum
- 10 Cloverfield Lane
- 10 Draconis
- 10 Hygiea
- 10 Lacertae
- 10 Leonis Minoris
- 10 Persei
- 10 Serpentis
- 10 Tauri
- 10 Ursae Majoris
- 10 Vulpeculae
- 100 Aquarii
- 100 Biggest Weather Moments
- 100 Hekate
- 100 Tears
- 100 Year Starship
- 100-year flood
- 1000 Piazzia
- 100000 Astronautica
- 10001 Palermo
- 1001 Gaussia
- 1001 Inventions and the World of Ibn Al-Haytham
- 1002 Olbersia
- 100268 Rosenthal
- 1003 Lilofee
- 1004 Belopolskya
- 10046 Creighton
- 1005 Arago
- 1006 Lagrangea
- 1007 Pawlowia
- 1008 La Paz
- 1009 Sirene
- 100P/Hartley
- 100th meridian east
- 100th meridian west
- 101 Aquarii
- 101 Helena
- 101 Piscium
- 101 Virginis
- 1010 Marlene
- 1011 Laodamia
- 1012 Sarema
- 10121 Arzamas
- 1013 Tombecka
- 1014 Semphyra
- 10140 Villon
- 1015 Christa
- 1016 Anitra
- 1017 Jacqueline
- 1018 Arnolda
- 1019 Strackea
- 101955 Bennu
- 10199 Chariklo
- 101P/Chernykh
- 101st meridian east
- 101st meridian west
- 102 Herculis
- 102 Miriam
- 1020 Arcadia
- 10208 Germanicus
- 1021 Flammario
- 1022 Olympiada
- 1023 Thomana
- 1024 Hale
- 10241 Miličević
- 10244 Thüringer Wald
- 10245 Inselsberg
- 10247 Amphiaraos
- 10249 Harz
- 1025 Riema
- 10251 Mulisch
- 10252 Heidigraf
- 10258 Sárneczky
- 1026 Ingrid
- 1027 Aesculapia
- 1028 Lydina
- 1029 La Plata
- 102P/Shoemaker
- 102nd meridian east
- 102nd meridian west
- 103 Aquarii
- 103 Hera
- 1030 Vitja
- 1031 Arctica
- 1032 Pafuri
- 1033 Simona
- 1034 Mozartia
- 1035 Amata
- 1036 Ganymed
- 1037 Davidweilla
- 10370 Hylonome
- 1038 Tuckia
- 1039 Sonneberga
- 103P/Hartley
- 103rd meridian east
- 103rd meridian west
- 104 Aquarii
- 104 Herculis
- 104 Klymene
- 104 Tauri
- 1040 Klumpkea
- 1041 Asta
- 10415 Mali Lošinj
- 1042 Amazone
- 1043 Beate
- 1044 Teutonia
- 1045 Michela
- 1046 Edwin
- 1047 Geisha
- 10476 Los Molinos
- 1048 Feodosia
- 1049 Gotho
- 104P/Kowal
- 104th meridian east
- 104th meridian west
- 105 Artemis
- 1050 Meta
- 10502 Armaghobs
- 1051 Merope
- 1052 Belgica
- 1053 Vigdis
- 1054 Forsytia
- 1055 Tynka
- 10551 Göteborg
- 1056 Azalea
- 1057 Wanda
- 1058 Grubba
- 1059 Mussorgskia
- 105P/Singer Brewster
- 105th meridian east
- 105th meridian west
- 106 Aquarii
- 106 Dione
- 106 Herculis
- 1060 Magnolia
- 1061 Paeonia
- 1062 Ljuba
- 1063 Aquilegia
- 1064 Aethusa
- 10645 Brač
- 1065 Amundsenia
- 10656 Albrecht
- 1066 Lobelia
- 10660 Felixhormuth
- 1067 Lunaria
- 1068 Nofretete
- 1069 Planckia
- 106th meridian east
- 106th meridian west
- 107 Aquarii
- 107 Camilla
- 107 Piscium
- 1070 Tunica
- 1071 Brita
- 10711 Pskov
- 1072 Malva
- 1073 Gellivara
- 1074 Beljawskya
- 1075 Helina
- 1076 Viola
- 1077 Campanula
- 1078 Mentha
- 1079 Mimosa
- 107th meridian east
- 107th meridian west
- 108 Aquarii
- 108 Hecuba
- 1080 Orchis
- 1081 Reseda
- 1082 Pirola
- 1083 Salvia
- 10830 Desforges
- 1084 Tamariwa
- 1085 Amaryllis
- 1086 Nata
- 1087 Arabis
- 1088 Mitaka
- 1089 Tama
- 108th meridian east
- 108th meridian west
- 109 Felicitas
- 109 Herculis
- 109 Piscium
- 109 Piscium b
- 109 Tauri
- 109 Virginis
- 1091 Spiraea
- 1092 Lilium
- 1093 Freda
- 1094 Siberia
- 1095 Tulipa
- 1096 Reunerta
- 1097 Vicia
- 10979 Fristephenson
- 1098 Hakone
- 10988 Feinstein
- 1099 Figneria
- 109th meridian east
- 109th meridian west
- 10P/Tempel
- 10th FAI World Rally Flying Championship
- 10th meridian east
- 10th meridian west
- 10th parallel north
- 10th parallel south
- 11 Andromedae
- 11 Aquarii
- 11 Aquilae
- 11 Arietis
- 11 Boötis
- 11 Camelopardalis
- 11 Canis Majoris
- 11 Canis Minoris
- 11 Cephei
- 11 Comae Berenices
- 11 Lacertae
- 11 Leonis Minoris
- 11 Librae
- 11 Orionis
- 11 Parthenope
- 11 Persei
- 11 Puppis
- 11 Serpentis
- 11 Ursae Minoris
- 11 Ursae Minoris b
- 110 Herculis
- 110 Lydia
- 110 Virginis
- 1100 Arnica
- 11001001
- 1101 Clematis
- 1102 Pepita
- 11020 Orwell
- 1103 Sequoia
- 110393 Rammstein
- 1104 Syringa
- 1105 Fragaria
- 1106 Cydonia
- 11066 Sigurd
- 1107 Lictoria
- 1108 Demeter
- 1109 Tata
- 110th meridian east
- 110th meridian west
- 111 Ate
- 111 Herculis
- 111 Tauri
- 1110 Jaroslawa
- 1111 Reinmuthia
- 11118 Modra
- 1112 Polonia
- 1113 Katja
- 11132 Horne
- 11133 Kumotori
- 1114 Lorraine
- 1115 Sabauda
- 1116 Catriona
- 1117 Reginita
- 1118 Hanskya
- 1119 Euboea
- 111P/Helin–Roman–Crockett
- 111th meridian east
- 111th meridian west
- 112 Iphigenia
- 1120 Cannonia
- 1121 Natascha
- 1122 Neith
- 1123 Shapleya
- 1124 Stroobantia
- 1125 China
- 11252 Laërtes
- 1126 Otero
- 11264 Claudiomaccone
- 1127 Mimi
- 11277 Ballard
- 1128 Astrid
- 1129 Neujmina
- 112P/Urata–Niijima
- 112th meridian east
- 112th meridian west
- 113 Amalthea
- 1130 Skuld
- 1131 Porzia
- 1132 Hollandia
- 1133 Lugduna
- 113390 Helvetia
- 1134 Kepler
- 1135 Colchis
- 11351 Leucus
- 1136 Mercedes
- 1137 Raïssa
- 1138 Attica
- 1139 Atami
- 113P/Spitaler
- 113th meridian east
- 113th meridian west
- 114 Kassandra
- 114 Tauri
- 1140 Crimea
- 11409 Horkheimer
- 1141 Bohmia
- 1142 Aetolia
- 11429 Demodokus
- 1143 Odysseus
- 1144 Oda
- 11441 Anadiego
- 1145 Robelmonte
- 1146 Biarmia
- 1147 Stavropolis
- 1148 Rarahu
- 1149 Volga
- 114P/Wiseman–Skiff
- 114th meridian east
- 114th meridian west
- 115 Thyra
- 1150 Achaia
- 11509 Thersilochos
- 1151 Ithaka
- 1152 Pawona
- 1153 Wallenbergia
- 1154 Astronomia
- 1155 Aënna
- 11552 Boucolion
- 1156 Kira
- 1157 Arabia
- 11573 Helmholtz
- 1158 Luda
- 1159 Granada
- 115P/Maury
- 115th meridian east
- 115th meridian west
- 116 Sirona
- 1160 Illyria
- 1161 Thessalia
- 1162 Larissa
- 1163 Saga
- 1164 Kobolda
- 1165 Imprinetta
- 1166 Sakuntala
- 11665 Dirichlet
- 1167 Dubiago
- 1168 Brandia
- 1169 Alwine
- 116903 Jeromeapt
- 116P/Wild
- 116th meridian east
- 116th meridian west
- 117 Lomia
- 1170 Siva
- 1171 Rusthawelia
- 11714 Mikebrown
- 1172 Äneas
- 1173 Anchises
- 1174 Marmara
- 1175 Margo
- 1176 Lucidor
- 1177 Gonnessia
- 1178 Irmela
- 1179 Mally
- 117P/Helin–Roman–Alu
- 117th meridian east
- 117th meridian west
- 118 (film)
- 118 Peitho
- 1180 Rita
- 1181 Lilith
- 1182 Ilona
- 11824 Alpaidze
- 1183 Jutta
- 1184 Gaea
- 118401 LINEAR
- 1185 Nikko
- 1186 Turnera
- 1187 Afra
- 1188 Gothlandia
- 11885 Summanus
- 11887 Echemmon
- 1189 Terentia
- 118P/Shoemaker–Levy
- 118th meridian east
- 118th meridian west
- 119 Althaea
- 119 Tauri
- 1190 Pelagia
- 1191 Alfaterna
- 1192 Prisma
- 1193 Africa
- 1194 Aletta
- 11948 Justinehénin
- 11949 Kagayayutaka
- 1195 Orangia
- 1196 Sheba
- 1197 Rhodesia
- 1198 Atlantis
- 1199 Geldonia
- 119P/Parker–Hartley
- 119th meridian east
- 119th meridian west
- 11:59 (Star Trek: Voyager)
- 11B97
- 11P/Tempel–Swift–LINEAR
- 11th FAI World Rally Flying Championship
- 11th meridian east
- 11th meridian west
- 11th parallel north
- 11th parallel south
- 12 Andromedae
- 12 Aquarii
- 12 Aquilae
- 12 Aurigae
- 12 Boötis
- 12 Camelopardalis
- 12 Cancri
- 12 Canis Majoris
- 12 Comae Berenices
- 12 Hydrae
- 12 Lacertae
- 12 Lyncis
- 12 Ophiuchi
- 12 Persei
- 12 Scorpii
- 12 Victoria
- 12 Vulpeculae
- 12 oz. Mouse
- 12 to the Moon
- 120 Lachesis
- 1200 Imperatrix
- 12002 Suess
- 1202 Marina
- 1203 Nanna
- 120347 Salacia
- 120375 Kugel
- 1204 Renzia
- 1205 Ebella
- 12052 Aretaon
- 1206 Numerowia
- 1207 Ostenia
- 1208 Troilus
- 1209 Pumma
- 120P/Mueller
- 120th meridian east
- 120th meridian west
- 121 Hermione
- 1212 Francette
- 1213 Algeria
- 1214 Richilde
- 1215 Boyer
- 1216 Askania
- 1217 Maximiliana
- 1218 Aster
- 1219 Britta
- 121P/Shoemaker–Holt
- 121st meridian east
- 121st meridian west
- 122 Gerda
- 1220 Crocus
- 1221 Amor
- 1222 Tina
- 1223 Neckar
- 12238 Actor
- 1225 Ariane
- 1226 Golia
- 1227 Geranium
- 1229 Tilia
- 122P/de Vico
- 122nd meridian east
- 122nd meridian west
- 123 Brunhild
- 1230 Riceia
- 1231 Auricula
- 1232 Cortusa
- 1233 Kobresia
- 1234 Elyna
- 1235 Schorria
- 12359 Cajigal
- 1236 Thaïs
- 1237 Geneviève
- 12373 Lancearmstrong
- 12374 Rakhat
- 1238 Predappia
- 1239 Queteleta
- 123rd meridian east
- 123rd meridian west
- 124 Alkeste
- 1240 Centenaria
- 1241 Dysona
- 1242 Zambesia
- 1243 Pamela
- 1244 Deira
- 12444 Prothoon
- 1245 Calvinia
- 1246 Chaka
- 1247 Memoria
- 1248 Jugurtha
- 12482 Pajka
- 1249 Rutherfordia
- 124th meridian east
- 124th meridian west
- 125 Liberatrix
- 1250 Galanthus
- 1251 Hedera
- 1252 Celestia
- 1253 Frisia
- 1255 Schilowa
- 1256 Normannia
- 12564 Ikeller
- 1257 Móra
- 1258 Sicilia
- 1259 Ógyalla
- 125P/Spacewatch
- 125th meridian east
- 125th meridian west
- 126 Tauri
- 126 Velleda
- 1261 Legia
- 1262 Sniadeckia
- 12621 Alsufi
- 1263 Varsavia
- 1264 Letaba
- 1266 Tone
- 1267 Geertruida
- 1268 Libya
- 1269 Rollandia
- 12696 Camus
- 126th meridian east
- 126th meridian west
- 127 Johanna
- 1270 Datura
- 1271 Isergina
- 12714 Alkimos
- 1272 Gefion
- 1274 Delportia
- 1275 Cimbria
- 1276 Ucclia
- 1277 Dolores
- 127th meridian east
- 127th meridian west
- 128 Nemesis
- 1280 Baillauda
- 1281 Jeanne
- 1282 Utopia
- 1283 Komsomolia
- 12838 Adamsmith
- 1284 Latvia
- 12848 Agostino
- 1286 Banachiewicza
- 1287 Lorcia
- 1289 Kutaïssi
- 128P/Shoemaker–Holt
- 128th meridian east
- 128th meridian west
- 129 Antigone
- 1291 Phryne
- 12923 Zephyr
- 1293 Sonja
- 1294 Antwerpia
- 1295 Deflotte
- 1296 Andrée
- 1297 Quadea
- 1298 Nocturna
- 1299 Mertona
- 12999 Toruń
- 129P/Shoemaker–Levy
- 129th meridian east
- 129th meridian west
- 12P/Pons–Brooks
- 12th meridian east
- 12th meridian west
- 12th parallel north
- 12th parallel south
- 13 Andromedae
- 13 Boötis
- 13 Cancri
- 13 Ceti
- 13 Comae Berenices
- 13 Egeria
- 13 Monocerotis
- 13 Sagittae
- 13 Scorpii
- 13 Trianguli
- 13 Vulpeculae
- 130 Elektra
- 1300 Marcelle
- 13003 Dickbeasley
- 13006 Schwaar
- 1301 Yvonne
- 1302 Werra
- 13025 Zürich
- 1303 Luthera
- 1304 Arosa
- 1305 Pongola
- 13058 Alfredstevens
- 1306 Scythia
- 13062 Podarkes
- 1307 Cimmeria
- 13070 Seanconnery
- 1308 Halleria
- 1309 Hyperborea
- 130P/McNaught–Hughes
- 130th meridian east
- 130th meridian west
- 131 Vala
- 1310 Villigera
- 1312 Vassar
- 13123 Tyson
- 1313 Berna
- 13154 Petermrva
- 1316 Kasan
- 1318 Nerina
- 13184 Augeias
- 1319 Disa
- 131st meridian east
- 131st meridian west
- 132 Aethra
- 132 Tauri
- 1322 Coppernicus
- 1323 Tugela
- 13241 Biyo
- 1325 Inanda
- 132524 APL
- 13260 Sabadell
- 1328 Devota
- 1329 Eliane
- 132P/Helin–Roman–Alu
- 132nd meridian east
- 132nd meridian west
- 133 Cyrene
- 1330 Spiridonia
- 1332 Marconia
- 1333 Cevenola
- 1334 Lundmarka
- 1335 Demoulina
- 133528 Ceragioli
- 1336 Zeelandia
- 1337 Gerarda
- 1338 Duponta
- 1339 Désagneauxa
- 13390 Bouška
- 133rd meridian east
- 133rd meridian west
- 134 Sophrosyne
- 134 Tauri
- 1340 Yvette
- 1341 Edmée
- 1345 Potomac
- 1346 Gotha
- 1347 Patria
- 13474 V'yus
- 1349 Bechuana
- 134th meridian east
- 134th meridian west
- 135 Hertha
- 1350 Rosselia
- 1353 Maartje
- 1354 Botha
- 1355 Magoeba
- 1356 Nyanza
- 1359 Prieska
- 135th meridian east
- 135th meridian west
- 136 Austria
- 136 Tauri
- 1361 Leuschneria
- 1362 Griqua
- 1364 Safara
- 1365 Henyey
- 1366 Piccolo
- 1368 Numidia
- 1369 Ostanina
- 136P/Mueller
- 136th meridian east
- 136th meridian west
- 137 Meliboea
- 1370 Hella
- 1372 Haremari
- 1373 Cincinnati
- 13732 Woodall
- 1374 Isora
- 1376 Michelle
- 1378 Leonce
- 1379 Lomonosowa
- 137th meridian east
- 137th meridian west
- 138 Tolosa
- 1380 Volodia
- 1382 Gerti
- 1383 Limburgia
- 1384 Kniertje
- 1388 Aphrodite
- 1389 Onnie
- 138P/Shoemaker–Levy
- 138th meridian east
- 138th meridian west
- 139 Juewa
- 139 Tauri
- 1390 Abastumani
- 1391 Carelia
- 1392 Pierre
- 1393 Sofala
- 1394 Algoa
- 13963 Euphrates
- 1397 Umtata
- 139P/Väisälä–Oterma
- 139th meridian east
- 139th meridian west
- 13P/Olbers
- 13th FAI World Rally Flying Championship
- 13th meridian east
- 13th meridian west
- 13th parallel north
- 13th parallel south
- 14 Andromedae
- 14 Andromedae b
- 14 Aquarii
- 14 Aquilae
- 14 Arietis
- 14 Aurigae
- 14 Boötis
- 14 Camelopardalis
- 14 Cancri
- 14 Canis Minoris
- 14 Ceti
- 14 Comae Berenices
- 14 Eridani
- 14 Herculis
- 14 Herculis b
- 14 Herculis c
- 14 Irene
- 14 Lacertae
- 14 Minutes Until Start
- 14 Persei
- 14 Sagittae
- 14 Sagittarii
- 14 Vulpeculae
- 140 Siwa
- 1400 Tirela
- 1404 Ajax
- 1405 Sibelius
- 1407 Lindelöf
- 1409 Isko
- 140th meridian east
- 140th meridian west
- 141 Lumen
- 1410 Margret
- 1411 Brauna
- 1412 Lagrula
- 1414 Jérôme
- 1416 Renauxa
- 1419 Danzig
- 141st meridian east
- 141st meridian west
- 142 Polana
- 1421 Esperanto
- 1422 Strömgrenia
- 1423 Jose
- 1424 Sundmania
- 1425 Tuorla
- 1426 Riviera
- 1428 Mombasa
- 1429 Pemba
- 142nd meridian east
- 142nd meridian west
- 143 Adria
- 1430 Somalia
- 1431 Luanda
- 1433 Geramtina
- 14335 Alexosipov
- 1434 Margot
- 1436 Salonta
- 1437 Diomedes
- 1439 Vogtia
- 143P/Kowal–Mrkos
- 143rd meridian east
- 143rd meridian west
- 144 Vibilia
- 1441 Bolyai
- 1443 Ruppina
- 14436 Morishita
- 1444 Pannonia
- 1446 Sillanpää
- 1447 Utra
- 1449 Virtanen
- 144P/Kushida
- 144th meridian east
- 144th meridian west
- 145 Adeona
- 1450 Raimonda
- 1451 Granö
- 1452 Hunnia
- 1453 Fennia
- 1455 Mitchella
- 145523 Lulin
- 145534 Jhongda
- 1457 Ankara
- 1459 Magnya
- 145th meridian east
- 145th meridian west
- 146 Lucina
- 1460 Haltia
- 1461 Jean-Jacques
- 1462 Zamenhof
- 14627 Emilkowalski
- 1466 Mündleria
- 1467 Mashona
- 1468 Zomba
- 1469 Linzia
- 146th meridian east
- 146th meridian west
- 147 Protogeneia
- 1470 Carla
- 1473 Ounas
- 1474 Beira
- 1477 Bonsdorffia
- 1478 Vihuri
- 14789 GAISH
- 1479 Inkeri
- 147P/Kushida–Muramatsu
- 147th meridian east
- 147th meridian west
- 148 Gallia
- 1481 Tübingia
- 14827 Hypnos
- 14832 Alechinsky
- 1484 Postrema
- 1486 Marilyn
- 14871 Pyramus
- 148780 Altjira
- 148th meridian east
- 148th meridian west
- 149 Medusa
- 1490 Ch'ing-yang event
- 1490 Limpopo
- 1493 Sigrid
- 1494 Savo
- 1496 Turku
- 14968 Kubáček
- 14974 Počátky
- 1499 Pori
- 149th meridian east
- 149th meridian west
- 14P/Wolf
- 14th FAI World Rally Flying Championship
- 14th meridian east
- 14th meridian west
- 14th parallel north
- 14th parallel south
- 15 Andromedae
- 15 Aquarii
- 15 Aquilae
- 15 Arietis
- 15 Boötis
- 15 Camelopardalis
- 15 Cancri
- 15 Canis Majoris
- 15 Cygni
- 15 Draconis
- 15 Eridani
- 15 Eunomia
- 15 Lacertae
- 15 Leonis Minoris
- 15 Lyncis
- 15 Orionis
- 15 Sagittae
- 15 Sagittarii
- 15 Ursae Majoris
- 15 Vulpeculae
- 150 Nuwa
- 1500 Jyväskylä
- 15017 Cuppy
- 1503 Kuopio
- 1504 Lappeenranta
- 1505 Koranna
- 1506 Xosa
- 1508 Kemi
- 1509 Esclangona
- 15092 Beegees
- 15094 Polymele
- 150th meridian east
- 150th meridian west
- 151 Abundantia
- 1510 Charlois
- 1511 Daléra
- 1512 Oulu
- 1513 Mátra
- 1514 Ricouxa
- 1516 Henry
- 1517 Beograd
- 1518 Rovaniemi
- 151997 Bauhinia
- 151st meridian east
- 151st meridian west
- 152 Atala
- 1520 Imatra
- 1521 Seinäjoki
- 152188 Morricone
- 1522 Kokkola
- 15224 Penttilä
- 1523 Pieksämäki
- 1524 Joensuu
- 1525 Savonlinna
- 15258 Alfilipenko
- 15262 Abderhalden
- 15268 Wendelinefroger
- 1527 Malmquista
- 1529 Oterma
- 152P/Helin–Lawrence
- 152nd meridian east
- 152nd meridian west
- 153 Hilda
- 1530 Rantaseppä
- 1532 Inari
- 1533 Saimaa
- 1534 Näsi
- 1535 Päijänne
- 15350 Naganuma
- 1536 Pielinen
- 1537 Transylvania
- 15374 Teta
- 153P/Ikeya–Zhang
- 153rd meridian east
- 153rd meridian west
- 154 Bertha
- 1540 Kevola
- 1541 Estonia
- 15415 Rika
- 1542 Schalén
- 1543 Bourgeois
- 1544 Vinterhansenia
- 1545 Thernöe
- 1546 Izsák
- 15460 Manca
- 154th meridian east
- 154th meridian west
- 155 Scylla
- 1550 Tito
- 1551 Argelander
- 1552 Bessel
- 1553 Bauersfelda
- 1554 Yugoslavia
- 1555 Dejan
- 1556 Wingolfia
- 1558 Järnefelt
- 1559 Kustaanheimo
- 155th meridian east
- 155th meridian west
- 156 Xanthippe
- 1563 Noël
- 1564 Srbija
- 1565 Lemaître
- 1566 Icarus
- 1567 Alikoski
- 1568 Aisleen
- 1569 Evita
- 156th meridian east
- 156th meridian west
- 157 Dejanira
- 1570 Brunonia
- 1573 Väisälä
- 1574 Meyer
- 1575 Winifred
- 1576 Fabiola
- 15760 Albion
- 1578 Kirkwood
- 157P/Tritton
- 157th meridian east
- 157th meridian west
- 158 Koronis
- 1580 Betulia
- 1581 Abanderada
- 15810 Arawn
- 15811 Nüsslein-Volhard
- 15817 Lucianotesi
- 1582 Martir
- 1583 Antilochus
- 1585 Union
- 1588 Descamisada
- 1589 Fanatica
- 158P/Kowal–LINEAR
- 158th meridian east
- 158th meridian west
- 159 Aemilia
- 1590 Tsiolkovskaja
- 1597 Laugier
- 159P/LONEOS
- 159th meridian east
- 159th meridian west
- 15P/Finlay
- 15th FAI World Precision Flying Championship
- 15th FAI World Rally Flying Championship
- 15th meridian east
- 15th meridian west
- 15th parallel north
- 15th parallel south
- 16 Aquarii
- 16 Arietis
- 16 Aurigae
- 16 Camelopardalis
- 16 Cephei
- 16 Comae Berenices
- 16 Cygni
- 16 Cygni Bb
- 16 Lacertae
- 16 Librae
- 16 Lyncis
- 16 Lyrae
- 16 Persei
- 16 Psyche
- 16 Puppis
- 16 Sagittarii
- 16 Serpentis
- 16 Virginis
- 16 Vulpeculae
- 160 Una
- 160-minute solar cycle
- 1600 Vyssotsky
- 1602 Indiana
- 1604 Tombaugh
- 1605 Milankovitch
- 1607 Mavis
- 1608 Muñoz
- 1609 Brenda
- 160P/LINEAR
- 160th meridian east
- 160th meridian west
- 161 Athor
- 1611 Beyer
- 1615 Bardwell
- 1617 Alschmitt
- 1619 Ueta
- 161989 Cacus
- 161P/Hartley–IRAS
- 161st meridian east
- 161st meridian west
- 162 Laurentia
- 1620 Geographos
- 1621 Druzhba
- 162173 Ryugu
- 1622 Chacornac
- 1623 Vivian
- 1625 The NORC
- 1626 Sadeya
- 1627 Ivar
- 1628 Strobel
- 162nd meridian east
- 162nd meridian west
- 163 Erigone
- 1631 Kopff
- 1632 Sieböhme
- 1633 Chimay
- 1635 Bohrmann
- 163693 Atira
- 1637 Swings
- 1639 transit of Venus
- 163P/NEAT
- 163rd meridian east
- 163rd meridian west
- 164 Eva
- 1644 Rafita
- 164589 La Sagra
- 1646 Rosseland
- 1647 Menelaus
- 1648 Shajna
- 164P/Christensen
- 164th meridian east
- 164th meridian west
- 165 Loreley
- 1650 Heckmann
- 1651 Behrens
- 1652 Hergé
- 16525 Shumarinaiko
- 1655 Comas Solà
- 1656 Suomi
- 16560 Daitor
- 1657 Roemera
- 1658 Innes
- 1659 Punkaharju
- 165P/LINEAR
- 165th meridian east
- 165th meridian west
- 166 Rhodope
- 1660 Wood
- 1661 Granule
- 1663 van den Bos
- 1665 Gaby
- 1669 Dagmar
- 166P/NEAT
- 166th meridian east
- 166th meridian west
- 167 Urda
- 1671 Chaika
- 1672 Gezelle
- 1675 Simonida
- 16765 Agnesi
- 1677 Tycho Brahe
- 167P/CINEOS
- 167th meridian east
- 167th meridian west
- 168 Sibylla
- 1680 Per Brahe
- 1681 Steinmetz
- 1682 Karel
- 1683 Castafiore
- 1684 Iguassú
- 1685 Toro
- 1687 Glarona
- 16879 Campai
- 1688 Wilkens
- 1689 Floris-Jan
- 168P/Hergenrother
- 168th meridian east
- 168th meridian west
- 169 Zelia
- 1690 Mayrhofer
- 1691 Oort
- 1692 Subbotina
- 1693 Hertzsprung
- 1694 Kaiser
- 1695 Walbeck
- 1696 Nurmela
- 16974 Iphthime
- 169P/NEAT
- 169th meridian east
- 169th meridian west
- 16P/Brooks
- 16th FAI World Precision Flying Championship
- 16th meridian east
- 16th meridian west
- 16th parallel north
- 16th parallel south
- 17 Aquarii
- 17 Camelopardalis
- 17 Canis Majoris
- 17 Crateris
- 17 Cygni
- 17 Eridani
- 17 King Street, Bristol
- 17 Leporis
- 17 Lyrae
- 17 Monocerotis
- 17 Persei
- 17 Sagittarii
- 17 Thetis
- 17 Vulpeculae
- 170 Maria
- 1700 Zvezdara
- 1703 Barry
- 17035 Velichko
- 1704 Wachmann
- 1707 Chantal
- 1708 Pólit
- 1709 Ukraina
- 170P/Christensen
- 170th meridian east
- 170th meridian west
- 171 G. Puppis
- 171 Ophelia
- 1710 Gothard
- 17102 Begzhigitova
- 1711 Sandrine
- 17119 Alexisrodrz
- 1712 Angola
- 1713 Bancilhon
- 1714 Sy
- 17163 Vasifedoseev
- 1717 Arlon
- 1719 Jens
- 17198 Gorjup
- 171P/Spahr
- 171st meridian east
- 171st meridian west
- 172 Baucis
- 1720 Niels
- 1721 Wells
- 1722 Goffin
- 1724 Vladimir
- 17246 Christophedumas
- 1726 Hoffmeister
- 1727 Mette
- 1728 Goethe Link
- 1729 Beryl
- 172P/Yeung
- 172nd meridian east
- 172nd meridian west
- 173 Ino
- 1731 Smuts
- 17314 Aisakos
- 1732 Heike
- 1734 Zhongolovich
- 1735 ITA
- 1736 Floirac
- 1737 Severny
- 1739 Meyermann
- 173P/Mueller
- 173rd meridian east
- 173rd meridian west
- 174 Phaedra
- 1740 Paavo Nurmi
- 1741 Giclas
- 1743 Schmidt
- 174567 Varda
- 1746 Brouwer
- 1747 Wright
- 17473 Freddiemercury
- 1748 Mauderli
- 1749 Telamon
- 17492 Hippasos
- 174th meridian east
- 174th meridian west
- 175 Andromache
- 1750 Eckert
- 1751 Herget
- 1753 Mieke
- 1754 Cunningham
- 1755 Lorbach
- 1757 Porvoo
- 1759 Kienle
- 175th meridian east
- 175th meridian west
- 176 Iduna
- 1760 Sandra
- 1761 Edmondson
- 1762 Russell
- 1763 Williams
- 1764 Cogshall
- 1765 Wrubel
- 1766 Slipher
- 1767 Lampland
- 1768 Appenzella
- 17683 Kanagawa
- 1769 transit of Venus observed from Tahiti
- 176th meridian east
- 176th meridian west
- 177 Irma
- 1771 Makover
- 1772 Gagarin
- 1775 Zimmerwald
- 1776 Kuiper
- 1777 Gehrels
- 1778 Alfvén
- 1779 Paraná
- 17795 Elysiasegal
- 177P/Barnard
- 177th meridian east
- 177th meridian west
- 178 Belisana
- 1780 Kippes
- 1781 Van Biesbroeck
- 1783 Albitskij
- 1783 Great Meteor
- 1784 Benguella
- 1788 Kiess
- 1789 Dobrovolsky
- 178P/Hug–Bell
- 178th meridian east
- 178th meridian west
- 179 Klytaemnestra
- 1790 Volkov
- 1791 Patsayev
- 1793 Zoya
- 1796 Riga
- 1798 Watts
- 1799 Koussevitzky
- 179th meridian east
- 179th meridian west
- 17K-AM
- 17th FAI World Precision Flying Championship
- 17th meridian east
- 17th meridian west
- 17th parallel north
- 17th parallel south
- 18 Andromedae
- 18 Aquarii
- 18 Aquilae
- 18 Aurigae
- 18 Boötis
- 18 Camelopardalis
- 18 Delphini
- 18 Delphini b
- 18 Draconis
- 18 Melpomene
- 18 Monocerotis
- 18 Sagittarii
- 18 Scorpii
- 18 Tauri
- 18 Ursae Majoris
- 18 Vulpeculae
- 180 Garumna
- 1800 Aguilar
- 1801 Titicaca
- 1803 Zwicky
- 1804 Chebotarev
- 1805 Dirikis
- 1806 Derice
- 1806-20 cluster
- 1807 Slovakia
- 1809 Prometheus
- 180th meridian
- 181 Eucharis
- 1810 Epimetheus
- 18117 Jonhodge
- 1815 Beethoven
- 1817 Katanga
- 1818 Brahms
- 182 Elsa
- 1822 Waterman
- 1823 Gliese
- 1824 Haworth
- 1825 Klare
- 1826 Miller
- 1827 Atkinson
- 183 Istria
- 1830 Pogson
- 1831 Nicholson
- 1832 Mrkos
- 1834 Palach
- 1835 Gajdariya
- 1836 Komarov
- 1837 Osita
- 184 Dejopeja
- 1840 Hus
- 1841 Masaryk
- 1842 Hynek
- 1844 Susilva
- 1845 Helewalda
- 1846 Bengt
- 1847 Stobbe
- 1848 Delvaux
- 1849 Kresák
- 18493 Demoleon
- 185 Eunike
- 1850 Kohoutek
- 1851 Lacroute
- 1852 Carpenter
- 1853 McElroy
- 1854 Skvortsov
- 1855 Korolev
- 1856 Růžena
- 185638 Erwinschwab
- 1857 Parchomenko
- 1858 Lobachevskij
- 1859 Kovalevskaya
- 186 Celuta
- 1860 Great Meteor
- 1861 Komenský
- 18610 Arthurdent
- 1862 Apollo
- 1863 Antinous
- 1864 Daedalus
- 1865 Cerberus
- 1866 Sisyphus
- 1867 Deiphobus
- 1868 Thersites
- 1869 Philoctetes
- 187 Lamberta
- 1870 Glaukos
- 1873 Agenor
- 1874 Transit of Venus Expedition to Campbell Island
- 1874 Transit of Venus Expedition to Hawaii
- 1874 transit of Venus
- 1877 Marsden
- 1879 Broederstroom
- 188 Menippe
- 1881 Shao
- 1882 transit of Venus
- 1887 Virton
- 18880 Toddblumberg
- 1889 Pakhmutova
- 189 Phthia
- 1897 Hind
- 18D/Perrine–Mrkos
- 18th FAI World Precision Flying Championship
- 18th meridian east
- 18th meridian west
- 18th parallel north
- 18th parallel south
- 19 Aquarii
- 19 Aquilae
- 19 Arietis
- 19 Aurigae
- 19 Camelopardalis
- 19 Canum Venaticorum
- 19 Cephei
- 19 Draconis
- 19 Fortuna
- 19 Lyncis
- 19 Lyrae
- 19 Monocerotis
- 19 Puppis
- 19 Tauri
- 19 Vulpeculae
- 190 Ismene
- 1900 Katyusha
- 1902 Shaposhnikov
- 1904 Massevitch
- 1905 Ambartsumian
- 1906 Naef
- 1907 Rudneva
- 1909 Alekhin
- 191 Kolga
- 1910 Mikhailov
- 1911 Schubart
- 1912 Anubis
- 1913 Great Meteor Procession
- 19139 Apian
- 1915 Quetzálcoatl
- 1916 Boreas
- 1917 Cuyo
- 1918 Aiguillon
- 1919 Clemence
- 192 Nausikaa
- 1920s Berlin
- 1921 Pala
- 1922 Zulu
- 1923 Osiris
- 1924 Horus
- 1925 Franklin-Adams
- 1927 Suvanto
- 1928 Summa
- 1929 Kollaa
- 193 Ambrosia
- 1930 Curuçá River event
- 1930 Lucifer
- 1931 Čapek
- 1933 Tinchen
- 1936 Lugano
- 19367 Pink Floyd
- 1938 Lausanna
- 1938 USDA soil taxonomy
- 19383 Rolling Stones
- 1939 Loretta
- 194 Prokne
- 1940 Whipple
- 1941 Wild
- 1943 Anteros
- 1944 Günter
- 1946 Walraven
- 1947 Iso-Heikkilä
- 195 Eurykleia
- 1951 Lick
- 1951 in spaceflight
- 1952 Hesburgh
- 1952 in spaceflight
- 19521 Chaos
- 1953 Rupertwildt
- 1953 in spaceflight
- 1954 Kukarkin
- 1954 in spaceflight
- 1955 Louisiana Highway renumbering
- 1955 McMath
- 1955 in spaceflight
- 1956 Artek
- 1956 in spaceflight
- 1957 Angara
- 1957 in spaceflight
- 1958 Chandra
- 1958 in spaceflight
- 1959 in spaceflight
- 196 Philomela
- 1960 Guisan
- 1960 in spaceflight
- 1960 in spaceflight (January–June)
- 1960 in spaceflight (July–December)
- 1961 Dufour
- 1961 in spaceflight
- 1961 in spaceflight (January–June)
- 1961 in spaceflight (July–December)
- 1962 in spaceflight
- 1962 in spaceflight (April–June)
- 1962 in spaceflight (January–March)
- 1962 in spaceflight (July–September)
- 1962 in spaceflight (October–December)
- 1963 in spaceflight
- 1963 in spaceflight (January–June)
- 1963 in spaceflight (July–December)
- 1964 in spaceflight
- 1964 in spaceflight (April–June)
- 1964 in spaceflight (January–March)
- 1964 in spaceflight (July–September)
- 1964 in spaceflight (October–December)
- 1965 in spaceflight
- 1965 in spaceflight (April–June)
- 1965 in spaceflight (January–March)
- 1965 in spaceflight (July–September)
- 1965 in spaceflight (October–December)
- 1965 van de Kamp
- 1966 NASA T-38 crash
- 1966 in spaceflight
- 1967 Menzel
- 1967 in spaceflight
- 1968 in spaceflight
- 1969 (TV series)
- 1969 in spaceflight
- 197 Arete
- 1970 in spaceflight
- 1971 Hagihara
- 1971 in spaceflight
- 1972 Great Daylight Fireball
- 1972 in spaceflight
- 1973 in spaceflight
- 19738 Calinger
- 1974 in spaceflight
- 19741 Callahan
- 1975 in spaceflight
- 1976 in spaceflight
- 19763 Klimesh
- 1977 Shura
- 1977 in spaceflight
- 1978 in spaceflight
- 1979 Sakharov
- 1979 XB
- 1979 in spaceflight
- 198 Ampella
- 1980 Plesetsk launch pad disaster
- 1980 Tezcatlipoca
- 1980 in spaceflight
- 1981 Midas
- 1981 in spaceflight
- 1982 Cline
- 1982 in spaceflight
- 1983 Bok
- 1983 in spaceflight
- 1984 in spaceflight
- 19848 Yeungchuchiu
- 1985 Beirut car bombings
- 1985 Hopmann
- 1985 in spaceflight
- 1986 State of the Union Address
- 1986 in spaceflight
- 1987 Kaplan
- 1987 in spaceflight
- 1988 Delores
- 1988 Lubbock apparition of Mary
- 1988 in spaceflight
- 1989 Tatry
- 1989 in spaceflight
- 199 Byblis
- 1990 Pilcher
- 1990 in spaceflight
- 1991 BA
- 1991 Darwin
- 1991 Halloween blizzard
- 1991 VG
- 1991 in spaceflight
- 1991 in spaceflight (January–June)
- 1991 in spaceflight (July–December)
- 1992 Galvarino
- 1992 in spaceflight
- 1993 DA
- 1993 RP
- 1993 in spaceflight
- 1994 Shane
- 1994 WR12
- 1994 in spaceflight
- 1995 GJ
- 1995 Hajek
- 1995 SN55
- 1995 in spaceflight
- 1996 Adams
- 1996 PW
- 1996 in spaceflight
- 1997 Leverrier
- 1997 in spaceflight
- 1998 DK36
- 1998 KY26
- 1998 Titius
- 1998 WW31
- 1998 in spaceflight
- 19982 Barbaradoore
- 1999 AO10
- 1999 Hirayama
- 1999 LE31
- 1999 OJ4
- 1999 TR11
- 1999 XS35
- 1999 in spaceflight
- 19P/Borrelly
- 19th meridian east
- 19th meridian west
- 19th parallel north
- 19th parallel south
- 1E 161348-5055
- 1ES 1101-232
- 1KUNS-PF
- 1RXS
- 1RXS J160929.1−210524
- 1st meridian east
- 1st meridian west
- 1st parallel north
- 1st parallel south
- 2 Andromedae
- 2 Aurigae
- 2 Boötis
- 2 Camelopardalis
- 2 Centauri
- 2 Ceti
- 2 Cygni
- 2 Equulei
- 2 Lacertae
- 2 Lupi
- 2 Lyncis
- 2 Pallas
- 2 Pegasi
- 2 Persei
- 2 Piscis Austrini
- 2 Scorpii
- 2 Sextantis
- 2 Ursae Minoris
- 2 Vulpeculae
- 2,2,2-Trifluoroethanol
- 2.01 (Buran-class spacecraft)
- 2.02 (Buran-class spacecraft)
- 2.03 (Buran-class spacecraft)
- 20 Aquarii
- 20 Aquilae
- 20 Arietis
- 20 Boötis
- 20 Cancri
- 20 Canum Venaticorum
- 20 Ceti
- 20 Cygni
- 20 Leonis Minoris
- 20 Massalia
- 20 Million Miles to Earth
- 20 Monocerotis
- 20 Ophiuchi
- 20 Persei
- 20 Puppis
- 20 Vulpeculae
- 200 Dynamene
- 2000 AD (comics)
- 2000 DG8
- 2000 EM26
- 2000 Herschel
- 2000 SG344
- 2000 in spaceflight
- 20000 Varuna
- 2001 AV43
- 2001 Einstein
- 2001 GO2
- 2001 Mars Odyssey
- 2001 QR322
- 2001 QW322
- 2001 YB5
- 2001 in spaceflight
- 2001: A Space Odyssey
- 2001: A Space Odyssey (comics)
- 2001: A Space Odyssey (film)
- 2001: A Space Odyssey (novel)
- 2001: A Space Odyssey (score)
- 2001: A Space Odyssey (soundtrack)
- 2001: A Space Odyssey in popular culture
- 2001: A Space Travesty
- 2002 AA29
- 2002 AT4
- 2002 Eastern Mediterranean event
- 2002 Euler
- 2002 GB32
- 2002 JE9
- 2002 MN
- 2002 NY40
- 2002 RN109
- 2002 Vitim event
- 2002 XV93
- 2002 in spaceflight
- 2003 BR47
- 2003 E2 nightclub stampede
- 2003 Harding
- 2003 LA7
- 2003 QX113
- 2003 SM84
- 2003 SQ317
- 2003 SS422
- 2003 YN107
- 2003 in spaceflight
- 2004 BX159
- 2004 FH
- 2004 FU162
- 2004 HR56
- 2004 KV18
- 2004 Lexell
- 2004 TG10
- 2004 TN1
- 2004 XP14
- 2004 XR190
- 2004 in spaceflight
- 2004 transit of Venus
- 2005 HC4
- 2005 Hencke
- 2005 NB56
- 2005 RH52
- 2005 TN53
- 2005 TN74
- 2005 VX3
- 2005 WY55
- 2005 in spaceflight
- 2006 BL8
- 2006 HH123
- 2006 JY26
- 2006 LM1
- 2006 Mumbai sweet seawater incident
- 2006 North Korean missile test
- 2006 Polonskaya
- 2006 QH181
- 2006 QQ23
- 2006 QV89
- 2006 RH120
- 2006 RJ103
- 2006 in spaceflight
- 2006 nightlife legislation in New York City
- 2007 BP102
- 2007 Carancas impact event
- 2007 Chinese anti-satellite missile test
- 2007 FT3
- 2007 McCuskey
- 2007 NC7
- 2007 TU24
- 2007 UW1
- 2007 VE191
- 2007 VK184
- 2007 WD5
- 2007 in spaceflight
- 2008 AO112
- 2008 CK70
- 2008 FF5
- 2008 HJ
- 2008 Konstitutsiya
- 2008 LC18
- 2008 TC3
- 2008 VL14
- 2008 in spaceflight
- 2009 BD
- 2009 DD45
- 2009 Jupiter impact event
- 2009 KK
- 2009 North Korean missile tests
- 2009 RR
- 2009 Sulawesi superbolide
- 2009 VA
- 2009 Voloshina
- 2009 in spaceflight
- 2009 satellite collision
- 201 Penelope
- 2010 AA15
- 2010 AB78
- 2010 AL30
- 2010 AU118
- 2010 BK118
- 2010 Chebyshev
- 2010 Chinese anti-ballistic missile test
- 2010 EU65
- 2010 FX86
- 2010 GA6
- 2010 GB174
- 2010 GZ60
- 2010 JL88
- 2010 JO179
- 2010 Jupiter impact event
- 2010 KQ
- 2010 KZ39
- 2010 RF12
- 2010 RF43
- 2010 RX30
- 2010 TD54
- 2010 TJ
- 2010 TK7
- 2010 Tonight Show conflict
- 2010 VR11
- 2010 WC9
- 2010 WG9
- 2010 World Geothermal Congress
- 2010 XC15
- 2010 XG11
- 2010 in spaceflight
- 2010: Odyssey Two
- 2010: The Year We Make Contact
- 2011 CQ1
- 2011 EO40
- 2011 ES4
- 2011 FW62
- 2011 GA
- 2011 HM102
- 2011 KW48
- 2011 MD
- 2011 MM4
- 2011 QF99
- 2011 SC191
- 2011 SL25
- 2011 UN63
- 2011 Veteraniya
- 2011 WL2
- 2011 XC2
- 2011 in spaceflight
- 2012 (film)
- 2012 Aurora, Colorado shooting
- 2012 BX34
- 2012 DR30
- 2012 EG5
- 2012 FC71
- 2012 FN
- 2012 FP35
- 2012 GX17
- 2012 Guo Shou-Jing
- 2012 HE85
- 2012 KP24
- 2012 KT42
- 2012 LZ1
- 2012 National Reconnaissance Office space telescope donation to NASA
- 2012 TC4
- 2012 TV
- 2012 UE34
- 2012 UK meteoroid
- 2012 VP113
- 2012 XE133
- 2012 YQ1
- 2012 in spaceflight
- 2012 phenomenon
- 2012 transit of Venus
- 2012: Supernova
- 2013 AT183
- 2013 AZ60
- 2013 BL76
- 2013 BS45
- 2013 EC
- 2013 ET
- 2013 FQ28
- 2013 FS28
- 2013 FT28
- 2013 FW13
- 2013 GM3
- 2013 JX28
- 2013 LA2
- 2013 LX28
- 2013 ND15
- 2013 North Korean missile tests
- 2013 PJ10
- 2013 RA109
- 2013 RF98
- 2013 RH74
- 2013 SK100
- 2013 SL102
- 2013 SY99
- 2013 TV135
- 2013 TX68
- 2013 Tucapel
- 2013 UH15
- 2013 XY8
- 2013 YP139
- 2013 in spaceflight
- 2014 AA
- 2014 AF5
- 2014 DX110
- 2014 EC
- 2014 FC69
- 2014 FC72
- 2014 FE72
- 2014 FZ71
- 2014 HQ124
- 2014 JO25
- 2014 LY21
- 2014 MT69
- 2014 MV67
- 2014 North Korean missile tests
- 2014 OE394
- 2014 OL339
- 2014 OO6
- 2014 OS393
- 2014 Ontario fireball
- 2014 PN70
- 2014 Peshawar cinema bombings
- 2014 RC
- 2014 SC324
- 2014 SR349
- 2014 SS349
- 2014 ST373
- 2014 SV349
- 2014 UR116
- 2014 UZ224
- 2014 Vasilevskis
- 2014 XL7
- 2014 YX49
- 2014 in spaceflight
- 2015 AZ43
- 2015 BP513
- 2015 BP519
- 2015 FJ345
- 2015 GT50
- 2015 HM10
- 2015 KE172
- 2015 KG163
- 2015 KH162
- 2015 KH163
- 2015 KQ174
- 2015 Kerala meteoroid
- 2015 Lafayette shooting
- 2015 ME131
- 2015 RX245
- 2015 RY245
- 2015 SO2
- 2015 TB145
- 2015 TC25
- 2015 TH367
- 2015 Thailand bolide
- 2015 XJ351
- 2015 XX169
- 2015 XY261
- 2015 YA
- 2015 YQ1
- 2015 YU9
- 2015 in spaceflight
- 2016 AZ8
- 2016 DV1
- 2016 EU85
- 2016 Heinemann
- 2016 NL56
- 2016 PQ
- 2016 San Pablito Market fireworks explosion
- 2016 WF9
- 2016 in spaceflight
- 2017 AG13
- 2017 BQ6
- 2017 BS5
- 2017 China bolide
- 2017 DB120
- 2017 DR109
- 2017 FO161
- 2017 FZ2
- 2017 MB7
- 2017 MZ8
- 2017 North Korean missile tests
- 2017 OF69
- 2017 OO1
- 2017 QC36
- 2017 QP1
- 2017 SG33
- 2017 SN16
- 2017 SX17
- 2017 TD6
- 2017 Total Solar Eclipse stamp
- 2017 UV43
- 2017 VL2
- 2017 VR12
- 2017 VW13
- 2017 Wesson
- 2017 XO2
- 2017 XX61
- 2017 YE5
- 2017 YZ1
- 2017 in spaceflight
- 2018 AH
- 2018 BD
- 2018 BF3
- 2018 CB
- 2018 CC
- 2018 CF2
- 2018 CL
- 2018 CN2
- 2018 CY2
- 2018 DV1
- 2018 GE3
- 2018 LA
- 2018 LF16
- 2018 PD20
- 2018 RY7
- 2018 UA
- 2018 VG18
- 2018 VM35
- 2018 VP1
- 2018 WV1
- 2018 XB4
- 2018 in spaceflight
- 2019 AQ3
- 2019 AS5
- 2019 BE5
- 2019 BO
- 2019 BZ3
- 2019 GC6
- 2019 LF6
- 2019 MO
- 2019 OK
- 2019 OU1
- 2019 PG1
- 2019 SU3
- 2019 TA7
- 2019 TF7
- 2019 UN13
- 2019 in spaceflight
- 2019 van Albada
- 202 Chryseïs
- 2020 AV2
- 2020 BX12
- 2020 CD3
- 2020 CW
- 2020 HA10
- 2020 HS7
- 2020 JJ
- 2020 LD
- 2020 OV1
- 2020 OY4
- 2020 QG
- 2020 SO
- 2020 VT4
- 2020 VV
- 2020 XR
- 2020 in spaceflight
- 2020 in spaceflight (January–June)
- 2020 in spaceflight (July–December)
- 2020s in spaceflight
- 2021 in spaceflight
- 2022 West
- 2022 in spaceflight
- 2023 Asaph
- 2023 in spaceflight
- 2024 McLaughlin
- 2024 in spaceflight
- 2026 Cottrell
- 2028 Janequeo
- 2029 Binomi
- 203 Pompeja
- 2031 BAM
- 2032 Ethel
- 20325 Julianoey
- 2033 Basilea
- 2034 Bernoulli
- 2035 Stearns
- 2036 Origin Unknown
- 2036 Sheragul
- 2037 Tripaxeptalis
- 2038 Bistro
- 2039 Payne-Gaposchkin
- 204 Kallisto
- 2043 Ortutay
- 2044 Wirt
- 2046 Leningrad
- 20461 Dioretsa
- 2047 Smetana
- 20488 Pic-du-Midi
- 205 Martha
- 2052 Tamriko
- 2054 Gawain
- 2055 Dvořák
- 2056 Nancy
- 2058 Róka
- 2059 Baboquivari
- 206 Hersilia
- 2060 Chiron
- 2061 Anza
- 2061: Odyssey Three
- 2062 Aten
- 2063 Bacchus
- 2064 Thomsen
- 2065 Spicer
- 2067 Aksnes
- 2069 Alpha Centauri mission
- 2069 Hubble
- 206P/Barnard–Boattini
- 207 Hedda
- 2072 Kosmodemyanskaya
- 2074 Shoemaker
- 208 Lacrimosa
- 2080 Jihlava
- 2081: A Hopeful View of the Human Future
- 2085 Henan
- 20898 Fountainhills
- 208P/McMillan
- 209 Dido
- 2090 Mizuho
- 2091 Sampo
- 2093 Genichesk
- 20936 Nemrut Dagi
- 2094 Magnitka
- 2098 Zyskin
- 2099 Öpik
- 209P/LINEAR
- 20D/Westphal
- 20th Century Limited
- 20th meridian east
- 20th meridian west
- 20th parallel north
- 20th parallel south
- 21 Aquarii
- 21 Aquilae
- 21 Arietis
- 21 Camelopardalis
- 21 Cancri
- 21 Canum Venaticorum
- 21 Comae Berenices
- 21 Leonis Minoris
- 21 Lutetia
- 21 Lyncis
- 21 Persei
- 21 Sagittarii
- 21 Tauri
- 21 Vulpeculae
- 210 Isabella
- 2100 Ra-Shalom
- 2101 Adonis
- 2102 Tantalus
- 2104 Toronto
- 21062 Iasky
- 21088 Chelyabinsk
- 211 Isolda
- 2111 Tselina
- 2114 Wallenquist
- 212 Medea
- 2120 Tyumenia
- 2121 Sevastopol
- 2122 Pyatiletka
- 2123 Vltava
- 2126 Gerasimovich
- 2127 Tanya
- 213 Lilaea
- 2131 Mayall
- 2134 Dennispalm
- 2135 Aristaeus
- 2139 Makharadze
- 214 Aschera
- 2140 Kemerovo
- 2143 Jimarnold
- 21436 Chaoyichi
- 2145 Blaauw
- 2146 Stentor
- 2148 Epeios
- 215 Oenone
- 21501 Acevedo
- 21509 Lucascavin
- 2151 Hadwiger
- 2153 Akiyama
- 21558 Alisonliu
- 2156 Kate
- 2159 Kukkamäki
- 216 Kleopatra
- 216433 Milianleo
- 2169 Taiwan
- 217 Eudora
- 2173 Maresjev
- 2175 Andrea Doria
- 21795 Masi
- 218 Bianca
- 2181 Fogelin
- 2187 La Silla
- 21873 Jindřichůvhradec
- 219 Thusnelda
- 21900 Orus
- 2195 Tengström
- 2197 Shanghai
- 21P/Giacobini–Zinner
- 21st meridian east
- 21st meridian west
- 21st parallel north
- 21st parallel south
- 22 Andromedae
- 22 Aquilae
- 22 Aurigae
- 22 Boötis
- 22 Camelopardalis
- 22 Cygni
- 22 Kalliope
- 22 Orionis
- 22 Scorpii
- 22 Tauri
- 22 Vulpeculae
- 220 Stephania
- 2201 Oljato
- 2202 Pele
- 2204 Lyyli
- 2207 Antenor
- 221 Eos
- 2212 Hephaistos
- 2213 Meeus
- 221628 Hyatt
- 222 Lucia
- 2223 Sarpedon
- 2227 Otto Struve
- 2228 Soyuz-Apollo
- 223 Rosa
- 224 Oceana
- 2241 Alcathous
- 2244 Tesla
- 2246 Bowell
- 225 Henrietta
- 225088 Gonggong
- 2253 Espinette
- 22577 Alfiuccio
- 226 Weringia
- 2260 Neoptolemus
- 227 Philosophia
- 22740 Rayleigh
- 2278 Götz
- 228 Agathe
- 2285 Ron Helin
- 22899 Alconrad
- 229 Adelinda
- 2296 Kugultinov
- 229762 Gǃkúnǁʼhòmdímà
- 22P/Kopff
- 22nd meridian east
- 22nd meridian west
- 22nd parallel north
- 22nd parallel south
- 23 Andromedae
- 23 Aquilae
- 23 Camelopardalis
- 23 Comae Berenices
- 23 Cygni
- 23 Librae
- 23 Librae b
- 23 Librae c
- 23 Orionis
- 23 Thalia
- 23 Ursae Majoris
- 23 Vulpeculae
- 230 Athamantis
- 2301 Whitford
- 2308 Schilt
- 231 Vindobona
- 2311 El Leoncito
- 2312 (novel)
- 2312 Duboshin
- 23131 Debenedictis
- 232 Russia
- 2324 Janice
- 2325 Chernykh
- 2328 Robeson
- 233 Asterope
- 23327 Luchernandez
- 234 Barbara
- 2340 Hathor
- 23436 Alekfursenko
- 2348 Michkovitch
- 2349 Kurchenko
- 235 Carolina
- 2350 BC Middle East Anomaly
- 2357 Phereclos
- 236 Honoria
- 2363 Cebriones
- 2368 Beltrovata
- 237 Coelestina
- 23712 Willpatrick
- 23718 Horgos
- 238 Hypatia
- 2384 Schulhof
- 238P/Read
- 239 Adrastea
- 2391 Tomita
- 23P/Brorsen–Metcalf
- 23rd meridian east
- 23rd meridian west
- 23rd parallel north
- 23rd parallel south
- 24 Aquarii
- 24 Aquilae
- 24 Boötis
- 24 Camelopardalis
- 24 Cancri
- 24 Canum Venaticorum
- 24 Capricorni
- 24 Cephei
- 24 Comae Berenices
- 24 Hours of Explicit Sex
- 24 Lyncis
- 24 Persei
- 24 Scorpii
- 24 Sextantis
- 24 Themis
- 24 Ursae Majoris
- 24 Vulpeculae
- 240 Vanadis
- 241 Germania
- 24101 Cassini
- 24105 Broughton
- 242 Kriemhild
- 2420 Čiurlionis
- 2423 Ibarruri
- 24260 Kriváň
- 2429 Schürer
- 243 Ida
- 2430 Bruce Helin
- 2433 Sootiyo
- 2436 Hatshepsut
- 244 Sita
- 2440 Educatio
- 2442 Corbett
- 2443 Tomeileen
- 2449 Kenos
- 245 Vera
- 2456 Palamedes
- 246 Asporina
- 24626 Astrowizard
- 246P/NEAT
- 247 Eukrate
- 2478 Tokai
- 248 Lameia
- 24827 Maryphil
- 2483 Guinevere
- 2486 Metsähovi
- 249 Ilse
- 2490 Bussolini
- 24988 Alainmilsztajn
- 24P/Schaumasse
- 24th meridian east
- 24th meridian west
- 24th parallel north
- 24th parallel south
- 25 Aquarii
- 25 Arietis
- 25 Cancri
- 25 Canum Venaticorum
- 25 Orionis
- 25 Phocaea
- 25 Scorpii
- 25 Serpentis
- 25 Vulpeculae
- 25 Years (song)
- 250 Bettina
- 2500 Alascattalo
- 25000 Astrometria
- 251 Sophia
- 25108 Boström
- 2513 Baetslé
- 25143 Itokawa
- 2518 Rutllant
- 252 Clementina
- 252P/LINEAR
- 253 Mathilde
- 2531 Cambridge
- 2537 Gilmore
- 254 Augusta
- 2542 Calpurnia
- 255 Oppavia
- 2554 Skiff
- 255P/Levy
- 256 Walpurga
- 257 Silesia
- 2571 Geisei
- 2572 Annschnell
- 2575 Bulgaria
- 2577 Litva
- 2578 Saint-Exupéry
- 258 Tyche
- 259 Aletheia
- 2590 Mourão
- 2591 Dworetsky
- 25924 Douglasadams
- 2594 Acamas
- 2598 Merlin
- 25D/Neujmin
- 25th meridian east
- 25th meridian west
- 25th meridian west from Washington
- 25th parallel north
- 25th parallel south
- 25zero
- 26 Andromedae
- 26 Aquarii
- 26 Aquilae
- 26 Arietis
- 26 Aurigae
- 26 Boötis
- 26 Camelopardalis
- 26 Canis Majoris
- 26 Cygni
- 26 Draconis
- 26 Hydrae
- 26 Proserpina
- 26 Ursae Majoris
- 26 Vulpeculae
- 260 Huberta
- 2606 Odessa
- 26074 Carlwirtz
- 2608 Seneca
- 261 Prymno
- 2613 Plzeň
- 262 Valda
- 2623 Zech
- 2629 Rudra
- 263 Dresda
- 2637 Bobrovnikoff
- 264 Libussa
- 2644 Victor Jara
- 2648 Owa
- 265 Anna
- 2658 Gingerich
- 266 Aline
- 2661 Bydžovský
- 266P/Christensen
- 267 Tirza
- 2672 Písek
- 2674 Pandarus
- 2675 Tolkien
- 2678 Aavasaksa
- 268 Adorea
- 2685 Masursky
- 26858 Misterrogers
- 269 Justitia
- 2691 Sersic
- 2696 Magion
- 2697 Albina
- 26P/Grigg–Skjellerup
- 26th Congress of the Communist Party of the Soviet Union (diamond)
- 26th meridian east
- 26th meridian west
- 26th parallel north
- 26th parallel south
- 27 Aquilae
- 27 Arietis
- 27 Cancri
- 27 Canis Majoris
- 27 Cygni
- 27 Euterpe
- 27 Hydrae
- 27 Lyncis
- 27 Monocerotis
- 27 Piscium
- 27 Vulpeculae
- 270 Anahita
- 2708 Burns
- 2709 Sagan
- 271 Penthesilea
- 271P/van Houten–Lemmon
- 272 Antonia
- 2726 Kotelnikov
- 27270 Guidotti
- 273 Atropos
- 2730 Barks
- 2732 Witt
- 273P/Pons–Gambart
- 274 Philagoria
- 2741 Valdivia
- 274301 Wikipedia
- 2744 Birgitta
- 2747 Český Krumlov
- 275 Sapientia
- 2751 Campbell
- 2752 Wu Chien-Shiung
- 2754 Efimov
- 2759 Idomeneus
- 276 Adelheid
- 276P/Vorobjov
- 277 Elvira
- 278 Paulina
- 279 Thule
- 2797 Teucer
- 27P/Crommelin
- 27th meridian east
- 27th meridian west
- 27th meridian west from Washington
- 27th parallel north
- 27th parallel south
- 28 Andromedae
- 28 Aquarii
- 28 Aquilae
- 28 Aurigae
- 28 Bellona
- 28 Camelopardalis
- 28 Cancri
- 28 Cygni
- 28 Monocerotis
- 28 Vulpeculae
- 280 Philia
- 2807 Karl Marx
- 281 Lucretia
- 2815 Soma
- 282 Clorinde
- 2826 Ahti
- 2829 Bobhope
- 283 Emma
- 2830 Greenwich
- 2839 Annette
- 284 Amalia
- 28439 Miguelreyes
- 284996 Rosaparks
- 285 Regina
- 286 Iclea
- 2862 Vavilov
- 2865 Laurel
- 2867 Šteins
- 287 Nephthys
- 2873 Binzel
- 2874 Jim Young
- 288 Glauke
- 2882 Tedesco
- 289 Nenetta
- 2892 Filipenko
- 2893 Peiroos
- 2895 Memnon
- 28978 Ixion
- 289P/Blanpain
- 28P/Neujmin
- 28th meridian east
- 28th meridian west
- 28th parallel north
- 28th parallel south
- 29 Amphitrite
- 29 Aquarii
- 29 Arietis
- 29 Camelopardalis
- 29 Cancri
- 29 Cygni
- 29 Herculis
- 29 Orionis
- 29 Persei
- 29 Vulpeculae
- 290 Bruna
- 2903 Zhuhai
- 2905 Plaskett
- 2906 Caltech
- 291 Alice
- 292 Ludovica
- 2920 Automedon
- 2927 Alamosa
- 29292 Conniewalker
- 293 Brasilia
- 2934 Aristophanes
- 2937 Gibbs
- 2939 Coconino
- 294 Felicia
- 2940 Bacon
- 2942 Cordie
- 295 Theresia
- 2956 Yeomans
- 2959 Scholl
- 296 Phaëtusa
- 297 Caecilia
- 2975 Spahr
- 298 Baptistina
- 2980 Cameron
- 2981 Chagall
- 2984 Chaucer
- 2985 Shakespeare
- 299 Thora
- 2995 Taratuta
- 2997 Cabrera
- 29P/Schwassmann–Wachmann
- 29th meridian east
- 29th meridian west
- 29th parallel north
- 29th parallel south
- 2:37
- 2I/Borisov
- 2M 1237+6526
- 2M1101AB
- 2M1207
- 2M1207b
- 2M1510
- 2MASS
- 2MASS 0036+1821
- 2MASS 0532+8246
- 2MASS 0939−2448
- 2MASS 1503+2525
- 2MASS 1507−1627
- 2MASS J02431371−2453298
- 2MASS J03552337+1133437
- 2MASS J04151954−0935066
- 2MASS J04414489+2301513
- 2MASS J0523−1403
- 2MASS J10475385+2124234
- 2MASS J11145133−2618235
- 2MASS J1119–1137
- 2MASS J11263991−5003550
- 2MASS J154043.42−510135.7
- 2MASS J18082002−5104378
- 2MASS J18352154–3123385
- 2MASS J18450079–1409036
- 2MASS J19383260+4603591
- 2MASS J19383260+4603591 b
- 2MASS J2126–8140
- 2MASS J21392676+0220226
- 2MASS J22282889–4310262
- 2MASS-GC02
- 2MASSI J0937347+293142
- 2MASX J00482185−2507365 occulting pair
- 2XMM J083026+524133
- 2d Space Operations Squadron
- 2d3
- 2dF Galaxy Redshift Survey
- 2nd meridian east
- 2nd meridian west
- 2nd parallel north
- 2nd parallel south
- 2suit
- 3 Andromedae
- 3 Aquarii
- 3 Boötis
- 3 Camelopardalis
- 3 Cancri
- 3 Cassiopeiae
- 3 Centauri
- 3 Ceti
- 3 Corner Satellite
- 3 Corvi
- 3 Equulei
- 3 Geminorum
- 3 Juno
- 3 Monocerotis
- 3 Persei
- 3 Piscis Austrini
- 3 Puppis
- 3 Serpentis
- 3 Vulpeculae
- 3-Hydroxybutanal
- 3-Hydroxyphenazepam
- 3.67 m Advanced Electro Optical System Telescope
- 3.6m Devasthal Optical Telescope
- 30 Aquarii
- 30 Arietis
- 30 Arietis Bb
- 30 Camelopardalis
- 30 Cygni
- 30 Geminorum
- 30 Herculis
- 30 Leonis Minoris
- 30 Monocerotis
- 30 Ophiuchi
- 30 Persei
- 30 Piscium
- 30 Urania
- 30 Vulpeculae
- 300 Geraldina
- 3000 Leonardo
- 30000 Camenzind
- 3001: The Final Odyssey
- 300P/Catalina
- 301 Bavaria
- 3015 Candy
- 302 Clarissa
- 3022
- 303 Josephina
- 3030 Deathwar
- 3031 Houston
- 3034 Climenhaga
- 3037 Alku
- 304 Olga
- 3040 Kozai
- 3043 San Diego
- 3045 Alois
- 3047 Goethe
- 305 Gordonia
- 3054 Strugatskia
- 306 Unitas
- 3063 Makhaon
- 3066 McFadden
- 3067 Akhmatova
- 307 Nike
- 3070 Aitken
- 30705 Idaios
- 30718 Records
- 3073 Kursk
- 3074 Popov
- 308 Polyxo
- 309 Fraternitas
- 30942 Helicaon
- 3099 Hergenrother
- 30P/Reinmuth
- 30th meridian east
- 30th meridian west
- 30th parallel north
- 30th parallel south
- 31 Aquilae
- 31 Arietis
- 31 Boötis
- 31 Camelopardalis
- 31 Comae Berenices
- 31 Crateris
- 31 Cygni
- 31 Euphrosyne
- 31 Leonis
- 31 Lyncis
- 31 Nights of Halloween
- 31 Orionis
- 31 Pegasi
- 31 Persei
- 31 Vulpeculae
- 310 Margarita
- 3102 Krok
- 3103 Eger
- 311 Claudia
- 31179 Gongju
- 31192 Aigoual
- 311P/PANSTARRS
- 312 Pierretta
- 3122 Florence
- 31249 Renéefleming
- 313 Chaldaea
- 3131 Mason-Dixon
- 3133 Sendai
- 3137 Horky
- 314 Rosalia
- 3141 Buchar
- 315 Constantia
- 316 Goberta
- 31641 Cevasco
- 3169 Ostro
- 317 Roxane
- 3174 Alcock
- 3176 Paolicchi
- 318 Magdalena
- 3181 Ahnert
- 31824 Elatus
- 3184 Raab
- 319 Leona
- 3192 A'Hearn
- 3198 Wallonia
- 3199 Nefertiti
- 31P/Schwassmann–Wachmann
- 31st meridian east
- 31st meridian west
- 31st parallel north
- 31st parallel south
- 32 Andromedae
- 32 Aquarii
- 32 Boötis
- 32 Cygni
- 32 Ophiuchi
- 32 Orionis
- 32 Pegasi
- 32 Persei
- 32 Pomona
- 32 Tauri
- 32 Vulpeculae
- 320 Katharina
- 3200 Phaethon
- 32008 Adriángalád
- 3201 Sijthoff
- 3202 Graff
- 3204 Lindgren
- 321 Florentina
- 3212 Agricola
- 32145 Katberman
- 322 Phaeo
- 32226 Vikulgupta
- 3225 Hoag
- 322P/SOHO
- 323 Brucia
- 324 Bamberga
- 3240 Laocoon
- 3247 Di Martino
- 325 Heidelberga
- 32532 Thereus
- 3254 Bus
- 3255 Tholen
- 326 Tamara
- 3267 Glo
- 3268 De Sanctis
- 327 Columbia
- 3277 Aaronson
- 328 Gudrun
- 3281 Maupertuis
- 3288 Seleucus
- 329 Svea
- 3290 Azabu
- 32P/Comas Solà
- 32nd meridian east
- 32nd meridian west
- 32nd meridian west from Washington
- 32nd parallel north
- 32nd parallel south
- 33 Arietis
- 33 Boötis
- 33 Cygni
- 33 Pegasi
- 33 Piscium
- 33 Polyhymnia
- 33 Vulpeculae
- 330 Adalberta
- 3309 Brorfelde
- 331 Etheridgea
- 3317 Paris
- 3318 Blixen
- 331P/Gibbs
- 332 Siri
- 3322 Lidiya
- 3325 TARDIS
- 332P/Ikeya–Murakami
- 333 Badenia
- 3330 Gantrisch
- 3333 Schaber
- 334 Chicago
- 3343 Nedzel
- 3345 Tarkovskij
- 335 Roberta
- 3350 Scobee
- 3352 McAuliffe
- 3353 Jarvis
- 335P/Gibbs
- 336 Lacadiera
- 3360 Syrinx
- 3361 Orpheus
- 3362 Khufu
- 3367 Alex
- 337 Devosa
- 338 Budrosa
- 339 Dorothea
- 3391 Sinon
- 33P/Daniel
- 33rd meridian east
- 33rd meridian west
- 33rd parallel north
- 33rd parallel south
- 34 Boötis
- 34 Cancri
- 34 Circe
- 34 Pegasi
- 34 Persei
- 340 Eduarda
- 3401 Vanphilos
- 3402 Wisdom
- 3406 Omsk
- 3409 Abramov
- 341 California
- 3412 Kafka
- 341520 Mors–Somnus
- 342 Endymion
- 3425 Hurukawa
- 3428 Roberts
- 342843 Davidbowie
- 343 Ostara
- 3430 Bradfield
- 34351 Decatur
- 344 Desiderata
- 345 Tercidina
- 3451 Mentor
- 346 Hermentaria
- 347 Pariana
- 348 May
- 349 Dembowska
- 3494 Purple Mountain
- 34D/Gale
- 34th meridian east
- 34th meridian west
- 34th meridian west from Washington
- 34th parallel north
- 34th parallel south
- 35 Aquarii
- 35 Aquilae
- 35 Arietis
- 35 Cancri
- 35 Comae Berenices
- 35 Cygni
- 35 Leukothea
- 35 Pegasi
- 35 Piscium
- 35 Vulpeculae
- 350 Ornamenta
- 351 Yrsa
- 352 Gisela
- 353 Ruperto-Carola
- 3537 Jürgen
- 354 Eleonora
- 3540 Protesilaos
- 3544 Borodino
- 3548 Eurybates
- 354P/LINEAR
- 355 Gabriella
- 3551 Verenia
- 3552 Don Quixote
- 3553 Mera
- 3554 Amun
- 3556 Lixiaohua
- 356 Liguria
- 3563 Canterbury
- 3564 Talthybius
- 3567 Alvema
- 3568 ASCII
- 357 Ninina
- 3578 Carestia
- 358 Apollonia
- 3581 Alvarez
- 359 Georgia
- 3596 Meriones
- 35P/Herschel–Rigollet
- 35th meridian east
- 35th meridian west
- 35th parallel north
- 35th parallel south
- 36 Andromedae
- 36 Aquilae
- 36 Arietis
- 36 Atalante
- 36 Aurigae
- 36 Cancri
- 36 Capricorni
- 36 Comae Berenices
- 36 Draconis
- 36 Lyncis
- 36 Ophiuchi
- 36 Persei
- 36 Serpentis
- 36 Tauri
- 36 Ursae Majoris
- 360 Carlova
- 361 Bononia
- 362 Havnia
- 3628 Božněmcová
- 363 Padua
- 3635 Kreutz
- 364 Isara
- 3640 Gostin
- 3642 Frieden
- 365 Corduba
- 365 Days of Astronomy
- 366 Vincentina
- 3669 Vertinskij
- 367 Amicitia
- 3671 Dionysus
- 3673 Levy
- 3674 Erbisbühl
- 367943 Duende
- 368 Haidea
- 3682 Welther
- 3687 Dzus
- 3688 Navajo
- 369 Aëria
- 3691 Bede
- 36P/Whipple
- 36th meridian east
- 36th meridian west
- 36th parallel north
- 36th parallel south
- 37 Aquilae
- 37 Cancri
- 37 Comae Berenices
- 37 Fides
- 37 Geminorum
- 37 Leonis Minoris
- 37 Librae
- 37 Tauri
- 370 Modestia
- 3700 Geowilliams
- 3703 Volkonskaya
- 3709 Polypoites
- 371 Bohemia
- 3710 Bogoslovskij
- 3714 Kenrussell
- 372 Palma
- 3724 Annenskij
- 3728 IRAS
- 373 Melusina
- 3737 Beckman
- 374 Burgundia
- 37432 Piszkéstető
- 37452 Spirit
- 3749 Balam
- 375 Ursula
- 37519 Amphios
- 3752 Camillo
- 3753 Cruithne
- 3754 Kathleen
- 3757 Anagolay
- 376 Geometria
- 37655 Illapa
- 377 Campania
- 3771 Alexejtolstoj
- 378 Holmia
- 3782 Celle
- 3785 Kitami
- 3787 Aivazovskij
- 3789 Zhongguo
- 379 Huenna
- 3790 Raywilson
- 3793 Leonteus
- 3794 Sthenelos
- 37P/Forbes
- 37th meridian east
- 37th meridian west
- 37th meridian west from Washington
- 37th parallel north
- 37th parallel south
- 38 Aquarii
- 38 Arietis
- 38 Aurigae
- 38 Boötis
- 38 Cancri
- 38 Geminorum
- 38 Leda
- 38 Leonis Minoris
- 38 Lyncis
- 38 Virginis
- 38 Virginis b
- 380 Fiducia
- 3800 Karayusuf
- 3801 Thrasymedes
- 38083 Rhadamanthus
- 381 Myrrha
- 382 Dodona
- 3822 Segovia
- 3823 Yorii
- 383 Janina
- 384 Burdigala
- 3841 Dicicco
- 3844 Lujiaxi
- 385 Ilmatar
- 3850 Peltier
- 3851 Alhambra
- 3854 George
- 385446 Manwë
- 385571 Otrera
- 385695 Clete
- 386 Siegena
- 38628 Huya
- 3868 Mendoza
- 387 Aquitania
- 3872 Akirafujii
- 3873 Roddy
- 388 Charybdis
- 389 Industria
- 3893 DeLaeter
- 38P/Stephan–Oterma
- 38th meridian east
- 38th meridian west
- 38th parallel north
- 38th parallel south
- 38th parallel structures
- 39 Andromedae
- 39 Aquarii
- 39 Arietis
- 39 Aurigae
- 39 Boötis
- 39 Cancri
- 39 Cygni
- 39 Draconis
- 39 Eridani
- 39 Laetitia
- 39 Leonis
- 39 Tauri
- 390 Alma
- 3905 Doppler
- 3908 Nyx
- 391 Ingeborg
- 3915 Fukushima
- 3917 Franz Schubert
- 392 Wilhelmina
- 393 Lampetia
- 3936 Elst
- 39382 Opportunity
- 394 Arduina
- 395 Delia
- 3951 Zichichi
- 3953 Perth
- 396 Aeolia
- 3960 Chaliubieju
- 3962 Valyaev
- 3963 Paradzhanov
- 397 Vienna
- 39741 Komm
- 398 Admete
- 3982 Kastel'
- 3988 Huma
- 39890 Bobstephens
- 399 Persephone
- 3996 Fugaku
- 39P/Oterma
- 39th meridian east
- 39th meridian west
- 39th meridian west from Washington
- 39th parallel north
- 39th parallel south
- 3C 109
- 3C 147
- 3C 171
- 3C 191
- 3C 20
- 3C 212
- 3C 215
- 3C 219
- 3C 223
- 3C 234
- 3C 236
- 3C 244.1
- 3C 249.1
- 3C 268.3
- 3C 273
- 3C 279
- 3C 285
- 3C 286
- 3C 288
- 3C 295
- 3C 299
- 3C 303
- 3C 305
- 3C 319
- 3C 321
- 3C 35
- 3C 371
- 3C 390.3
- 3C 401
- 3C 433
- 3C 438
- 3C 449
- 3C 452
- 3C 454.3
- 3C 47
- 3C 48
- 3C 58
- 3C 61.1
- 3C 66A
- 3C 66B
- 3C 75
- 3C 79
- 3C 9
- 3D city model
- 3D data acquisition and object reconstruction
- 3D fold evolution
- 3D-printed spacecraft
- 3DF Zephyr
- 3LAU
- 3MM-1
- 3XMM J004232.1+411314
- 3rd FAI World Rally Flying Championship
- 3rd Rock from the Sun
- 3rd meridian east
- 3rd meridian west
- 3rd parallel north
- 3rd parallel south
- 4 Andromedae
- 4 Aquarii
- 4 Aquilae
- 4 Arietis
- 4 Camelopardalis
- 4 Canum Venaticorum
- 4 Cassiopeiae
- 4 Centauri
- 4 Cygni
- 4 Equulei
- 4 Lacertae
- 4 Persei
- 4 Sagittarii
- 4 Scorpii
- 4 Ursae Majoris
- 4 Ursae Minoris
- 4 Vesta
- 4 Vulpeculae
- 4,722 Hours
- 4-Nitrophenol
- 40 Aquarii
- 40 Arietis
- 40 Aurigae
- 40 Boötis
- 40 Camelopardalis
- 40 Cancri
- 40 Eridani
- 40 Harmonia
- 40 Leonis
- 40 Persei
- 40-foot telescope
- 400 Ducrosa
- 400 Years of the Telescope
- 4000 Hipparchus
- 4001 Ptolemaeus
- 4003 Schumann
- 4007 Euryalos
- 4008 Corbin
- 4009 Drobyshevskij
- 401 Ottilia
- 4015 Wilson–Harrington
- 402 Chloë
- 4022 Nonna
- 4029 Bridges
- 403 Cyane
- 4031 Mueller
- 4034 Vishnu
- 404 Arsinoë
- 4045 Lowengrub
- 40463 Frankkameny
- 405 Thia
- 4055 Magellan
- 4057 Demophon
- 406 Erna
- 4060 Deipylos
- 4063 Euforbo
- 4065 Meinel
- 4068 Menestheus
- 407 Arachne
- 408 Fama
- 4082 Swann
- 4085 Weir
- 4086 Podalirius
- 409 Aspasia
- 4090 Říšehvězd
- 40P/Väisälä
- 40th meridian east
- 40th meridian west
- 40th parallel north
- 40th parallel south
- 41 Andromedae
- 41 Aquarii
- 41 Arietis
- 41 Aurigae
- 41 Capricorni
- 41 Comae Berenices
- 41 Cygni
- 41 Daphne
- 41 G. Arae
- 41 Leonis Minoris
- 41 Lyncis
- 41 Lyncis b
- 41 Ophiuchi
- 41 Tauri
- 41 Ursae Majoris
- 410 Chloris
- 411 Xanthe
- 4118 Sveta
- 412 Elisabetha
- 413 Edburga
- 4138 Kalchas
- 414 Liriope
- 4142 Dersu-Uzala
- 4147 Lennon
- 4149 Harrison
- 415 Palatia
- 4150 Starr
- 4151 Alanhale
- 416 Vaticana
- 417 Suevia
- 4175 Billbaum
- 4176 Sudek
- 4177 Kohman
- 4179 Toutatis
- 418 Alemannia
- 4183 Cuno
- 4185 Phystech
- 419 Aurelia
- 4197 Morpheus
- 41P/Tuttle–Giacobini–Kresák
- 41st meridian east
- 41st meridian west
- 41st parallel north
- 41st parallel south
- 42 (Doctor Who)
- 42 Aquarii
- 42 Aquilae
- 42 Aurigae
- 42 Camelopardalis
- 42 Cancri
- 42 Capricorni
- 42 Cassiopeiae
- 42 Draconis
- 42 Draconis b
- 42 Herculis
- 42 Isis
- 42 Librae
- 42 Orionis
- 42 Persei
- 420 Bertholda
- 420356 Praamzius
- 4205 David Hughes
- 4209 Briggs
- 421 Zähringia
- 4217 Engelhardt
- 422 Berolina
- 4222 Nancita
- 423 Diotima
- 4230 van den Bergh
- 42355 Typhon
- 424 Gratia
- 425 Cornelia
- 4257 Ubasti
- 426 Hippo
- 4263 Abashiri
- 4265 Kani
- 427 Galene
- 4276 Clifford
- 428 Monachia
- 4282 Endate
- 429 Lotis
- 42P/Neujmin
- 42nd meridian east
- 42nd meridian west
- 42nd parallel north
- 42nd parallel south
- 43 Ariadne
- 43 Aurigae
- 43 Camelopardalis
- 43 Persei
- 43 Sagittarii
- 430 Hybris
- 430 Space Shuttle
- 431 Nephele
- 4318 Baťa
- 432 Pythia
- 4324 Bickel
- 433 Eros
- 4332 Milton
- 434 Hungaria
- 4340 Dence
- 4341 Poseidon
- 4348 Poulydamas
- 4349 Tibúrcio
- 435 Ella
- 4354 Euclides
- 4358 Lynn
- 436 Patricia
- 4362 Carlisle
- 4364 Shkodrov
- 437 Rhodia
- 438 Zeuxo
- 4383 Suruga
- 4388 Jürgenstock
- 439 Ohio
- 4391 Balodis
- 43P/Wolf–Harrington
- 43rd meridian east
- 43rd meridian west
- 43rd parallel north
- 43rd parallel south
- 44 Andromedae
- 44 Aquarii
- 44 Boötis
- 44 Nysa
- 44 Ophiuchi
- 440 Theodora
- 4401 Aditi
- 441 Bathilde
- 442 Eichsfeldia
- 4429 Chinmoy
- 443 Photographica
- 4432 McGraw-Hill
- 4435 Holt
- 444 Gyptis
- 4440 Tchantchès
- 4446 Carolyn
- 445 Edna
- 4450 Pan
- 4451 Grieve
- 446 Aeternitas
- 447 Valentine
- 448 Natalie
- 4486 Mithra
- 449 Hamburga
- 4492 Debussy
- 44P/Reinmuth
- 44th meridian east
- 44th meridian west
- 44th parallel north
- 44th parallel south
- 45 Andromedae
- 45 Aquarii
- 45 Aquilae
- 45 Aurigae
- 45 Boötis
- 45 Cancri
- 45 Draconis
- 45 Eridani
- 45 Eugenia
- 45 Herculis
- 45 Ophiuchi
- 450 Brigitta
- 4501 Eurypylos
- 451 Patientia
- 452 Hamiltonia
- 4524 Barklajdetolli
- 4525 Johnbauer
- 453 Tea
- 45300 Thewrewk
- 454 Mathesis
- 4543 Phoinix
- 4544 Xanthus
- 4547 Massachusetts
- 455 Bruchsalia
- 456 Abnoba
- 457 Alleghenia
- 45737 Benita
- 458 Hercynia
- 4581 Asclepius
- 4585 Ainonai
- 4587 Rees
- 459 Signe
- 45P/Honda–Mrkos–Pajdušáková
- 45th meridian east
- 45th meridian west
- 45th parallel north
- 45th parallel south
- 45×90 points
- 46 Aquilae
- 46 Boötis
- 46 Cancri
- 46 Capricorni
- 46 Ceti
- 46 Hestia
- 46 Leonis Minoris
- 460 Scania
- 4606 Saheki
- 4607 Seilandfarm
- 4608 Wodehouse
- 461 Saskia
- 462 Eriphyla
- 463 Lola
- 464 Megaira
- 4647 Syuji
- 465 Alekto
- 4659 Roddenberry
- 466 Tisiphone
- 4660 Nereus
- 46610 Bésixdouze
- 467 Laura
- 4672 Takuboku
- 4674 Pauling
- 468 Lina
- 469 Argentina
- 469219 Kamoʻoalewa
- 469705 ǂKá̦gára
- 46P/Wirtanen
- 46th meridian east
- 46th meridian west
- 46th parallel north
- 46th parallel south
- 47 Aglaja
- 47 Andromedae
- 47 Aquarii
- 47 Arietis
- 47 Aurigae
- 47 Boötis
- 47 Capricorni
- 47 Cygni
- 47 Ophiuchi
- 47 Tauri
- 47 Tucanae
- 47 Ursae Majoris
- 47 Ursae Majoris b
- 47 Ursae Majoris c
- 47 Ursae Majoris d
- 470 Kilia
- 4707 Khryses
- 4708 Polydoros
- 4709 Ennomos
- 471 Papagena
- 471143 Dziewanna
- 4713 Steel
- 47171 Lempo
- 472 Roma
- 4722 Agelaos
- 473 Nolli
- 474 Prudentia
- 475 Ocllo
- 4754 Panthoos
- 4756 Asaramas
- 476 Hedwig
- 4760 Jia-xiang
- 4765 Wasserburg
- 4769 Castalia
- 477 Italia
- 4776 Luyi
- 478 Tergeste
- 4786 Tatianina
- 4789 Sprattia
- 479 Caprera
- 4790 Petrpravec
- 4791 Iphidamas
- 4792 Lykaon
- 4797 Ako
- 47P/Ashbrook–Jackson
- 47th meridian east
- 47th meridian west
- 47th parallel north
- 47th parallel south
- 48 Cassiopeiae
- 48 Doris
- 48 Hours of Hallucinatory Sex
- 48 Librae
- 48 Persei
- 480 Hansa
- 4804 Pasteur
- 4805 Asteropaios
- 481 Emita
- 482 Petrina
- 4822 Karge
- 4827 Dares
- 4828 Misenus
- 483 Seppina
- 4832 Palinurus
- 4833 Meges
- 4834 Thoas
- 4836 Medon
- 484 Pittsburghia
- 485 Genua
- 486 Cremona
- 4867 Polites
- 4868 Knushevia
- 486958 Arrokoth
- 487 Venetia
- 488 Kreusa
- 489 Comacina
- 4897 Tomhamilton
- 4899 Candace
- 48P/Johnson
- 48th meridian east
- 48th meridian west
- 48th parallel north
- 48th parallel south
- 49 Andromedae
- 49 Aquarii
- 49 Arietis
- 49 Aurigae
- 49 Camelopardalis
- 49 Cancri
- 49 Cassiopeiae
- 49 Ceti
- 49 Librae
- 49 Orionis
- 49 Pales
- 49 Persei
- 490 Veritas
- 4902 Thessandrus
- 4904 Makio
- 491 Carina
- 492 Gismonda
- 4923 Clarke
- 493 Griseldis
- 4936 Butakov
- 494 Virtus
- 4942 Munroe
- 4944 Kozlovskij
- 4946 Askalaphus
- 4947 Ninkasi
- 4949 Akasofu
- 495 Eulalia
- 4951 Iwamoto
- 4954 Eric
- 4957 Brucemurray
- 4959 Niinoama
- 496 Gryphia
- 4962 Vecherka
- 497 Iva
- 49777 Cappi
- 498 Tokio
- 499 Venusia
- 4997 Ksana
- 49P/Arend–Rigaux
- 49th meridian east
- 49th meridian west
- 49th parallel north
- 49th parallel south
- 4C +37.11
- 4C Array
- 4Frontiers Corporation
- 4GLS
- 4Kings
- 4P/Faye
- 4Pi microscope
- 4U 0142+61
- 4U 0614+091
- 4U 1543-475
- 4U 1700-37
- 4th meridian east
- 4th meridian west
- 4th parallel north
- 4th parallel south
- 5 Andromedae
- 5 Aquarii
- 5 Aquilae
- 5 Astraea
- 5 Aurigae
- 5 Camelopardalis
- 5 Cancri
- 5 Canum Venaticorum
- 5 Lacertae
- 5 Persei
- 5 Serpentis
- 5 Tauri
- 5 Ursae Minoris
- 5 Vulpeculae
- 5/16 inch star
- 50 Aquarii
- 50 Boötis
- 50 Cancri
- 50 Cassiopeiae
- 50 Persei
- 50 Virginia
- 500 Selinur
- 50000 Quaoar
- 501 Urhixidur
- 5010 Amenemhêt
- 5011 Ptah
- 5012 Eurymedon
- 502 Sigune
- 5023 Agapenor
- 5026 Martes
- 5027 Androgeos
- 5028 Halaesus
- 503 Evelyn
- 504 Cora
- 5040 Rabinowitz
- 5041 Theotes
- 505 Cava
- 506 Marion
- 507 Laodica
- 50719 Elizabethgriffin
- 508 Princetonia
- 5080 Oja
- 5088 Tancredi
- 509 Iolanda
- 50P/Arend
- 50th meridian east
- 50th meridian west
- 50th parallel north
- 50th parallel south
- 51 Andromedae
- 51 Aquarii
- 51 Aquilae
- 51 Arietis
- 51 Aurigae
- 51 Eridani
- 51 Eridani b
- 51 Hydrae
- 51 Nemausa
- 51 Ophiuchi
- 51 Orionis
- 51 Pegasi
- 51 Pegasi b
- 510 Mabella
- 5101 Akhmerov
- 511 Davida
- 512 Taurinensis
- 5120 Bitias
- 5126 Achaemenides
- 513 Centesima
- 5130 Ilioneus
- 514 Armida
- 514107 Kaʻepaokaʻawela
- 5143 Heracles
- 5144 Achates
- 5145 Pholus
- 5148 Giordano
- 515 Athalia
- 516 Amherstia
- 5160 Camoes
- 517 Edith
- 5171 Augustesen
- 5175 Ables
- 5176 Yoichi
- 518 Halawe
- 51823 Rickhusband
- 51824 Mikeanderson
- 51825 Davidbrown
- 51826 Kalpanachawla
- 51827 Laurelclark
- 51828 Ilanramon
- 51829 Williemccool
- 5185 Alerossi
- 519 Sylvania
- 5196 Bustelli
- 51983 Hönig
- 51P/Harrington
- 51st meridian east
- 51st meridian west
- 51st parallel north
- 51st parallel south
- 52 Arietis
- 52 Cygni
- 52 Europa
- 52 Herculis
- 52 Hydrae
- 52 Persei
- 52 Sagittarii
- 520 Franziska
- 5201 Ferraz-Mello
- 5208 Royer
- 521 Brixia
- 522 Helga
- 5222 Ioffe
- 52246 Donaldjohanson
- 52266 Van Flandern
- 523 Ada
- 524 Fidelio
- 5244 Amphilochos
- 525 Adelaide
- 5254 Ulysses
- 5256 Farquhar
- 5259 Epeigeus
- 526 Jena
- 5261 Eureka
- 5264 Telephus
- 527 Euryanthe
- 528 Rezia
- 5283 Pyrrhus
- 5284 Orsilocus
- 5285 Krethon
- 52872 Okyrhoe
- 529 Preziosa
- 52975 Cyllarus
- 52P/Harrington–Abell
- 52nd meridian east
- 52nd meridian west
- 52nd parallel north
- 52nd parallel south
- 53 Aquarii
- 53 Arietis
- 53 Aurigae
- 53 Camelopardalis
- 53 Cancri
- 53 Eridani
- 53 Kalypso
- 53 Ophiuchi
- 53 Persei
- 53 Piscium
- 53 Virginis
- 530 Turandot
- 531 Zerlina
- 5316 Filatov
- 5318 Dientzenhofer
- 532 Herculina
- 533 Sara
- 5331 Erimomisaki
- 53311 Deucalion
- 5333 Kanaya
- 5335 Damocles
- 534 Nassovia
- 535 Montague
- 5357 Sekiguchi
- 536 Merapi
- 537 Pauly
- 5370 Taranis
- 538 Friederike
- 5380 Sprigg
- 5381 Sekhmet
- 5385 Kamenka
- 539 Pamina
- 5391 Emmons
- 53P/Van Biesbroeck
- 53rd meridian east
- 53rd meridian west
- 53rd parallel north
- 53rd parallel south
- 54 Alexandra
- 54 Arietis
- 54 Aurigae
- 54 Cancri
- 54 Ceti
- 54 Eridani
- 54 Leonis
- 54 Persei
- 54 Piscium
- 54 Piscium b
- 540 Rosamunde
- 541 Deborah
- 541132 Leleākūhonua
- 542 Susanna
- 5426 Sharp
- 543 Charlotte
- 5430 Luu
- 5436 Eumelos
- 544 Jetta
- 545 Messalina
- 54509 YORP
- 54598 Bienor
- 546 Herodias
- 547 Praxedis
- 5474 Gingasen
- 5475 Hanskennedy
- 5477 Holmes
- 548 Kressida
- 5481 Kiuchi
- 549 Jessonda
- 54P/de Vico–Swift–NEAT
- 54th meridian east
- 54th meridian west
- 54th parallel north
- 54th parallel south
- 55 Andromedae
- 55 Arietis
- 55 Cancri
- 55 Cancri b
- 55 Cancri c
- 55 Cancri d
- 55 Cancri e
- 55 Cancri f
- 55 Cygni
- 55 Pandora
- 55 Pegasi
- 55 Persei
- 55 Ursae Majoris
- 550 Senta
- 551 Ortrud
- 5511 Cloanthus
- 552 Sigelinde
- 553 Kundry
- 5535 Annefrank
- 554 Peraga
- 5542 Moffatt
- 555 Norma
- 55576 Amycus
- 556 Phyllis
- 557 Violetta
- 55701 Ukalegon
- 558 Carmen
- 559 Nanon
- 5592 Oshima
- 55P/Tempel–Tuttle
- 55th meridian east
- 55th meridian west
- 55th parallel north
- 55th parallel south
- 56 Andromedae
- 56 Aquarii
- 56 Aquilae
- 56 Arietis
- 56 Ceti
- 56 Cygni
- 56 Melete
- 56 Orionis
- 56 Pegasi
- 56 Persei
- 56 Sagittarii
- 56 Ursae Majoris
- 560 Delila
- 561 Ingwelde
- 562 Salome
- 563 Suleika
- 5635 Cole
- 5638 Deikoon
- 564 Dudu
- 5641 McCleese
- 5642 Bobbywilliams
- 565 Marbachia
- 5652 Amphimachus
- 5653 Camarillo
- 5655 Barney
- 5656 Oldfield
- 566 Stereoskopia
- 567 Eleutheria
- 5677 Aberdonia
- 568 Cheruskia
- 5682 Beresford
- 569 Misa
- 5692 Shirao
- 56P/Slaughter–Burnham
- 56th meridian east
- 56th meridian west
- 56th parallel north
- 56th parallel south
- 57 Aquilae
- 57 Cancri
- 57 Cygni
- 57 Mnemosyne
- 57 Persei
- 570 Kythera
- 571 Dulcinea
- 572 Rebekka
- 573 Recha
- 5731 Zeus
- 574 Reginhild
- 57424 Caelumnoctu
- 575 Renate
- 5751 Zao
- 5756 Wassenbergh
- 576 Emanuela
- 577 Rhea
- 5771 Somerville
- 578 Happelia
- 5786 Talos
- 57868 Pupin
- 579 Sidonia
- 57P/du Toit–Neujmin–Delporte
- 57th meridian east
- 57th meridian west
- 57th parallel north
- 57th parallel south
- 58 Andromedae
- 58 Aquarii
- 58 Aquilae
- 58 Concordia
- 58 Eridani
- 58 Hydrae
- 58 Leonis
- 58 Ophiuchi
- 58 Persei
- 580 Selene
- 5806 Archieroy
- 58097 Alimov
- 581 Tauntonia
- 582 Olympia
- 583 Klotilde
- 584 Semiramis
- 585 Bilkis
- 58534 Logos
- 5855 Yukitsuna
- 586 Thekla
- 587 Hypsipyle
- 588 Achilles
- 589 Croatia
- 5899 Jedicke
- 58P/Jackson–Neujmin
- 58th Primetime Emmy Awards
- 58th meridian east
- 58th meridian west
- 58th parallel north
- 58th parallel south
- 59 Andromedae
- 59 Arietis
- 59 Aurigae
- 59 Cygni
- 59 Elpis
- 59 Leonis
- 59 Persei
- 59 Sagittarii
- 59 Serpentis
- 59 Virginis
- 590 Tomyris
- 5900 Jensen
- 5905 Johnson
- 591 Irmgard
- 592 Bathseba
- 593 Titania
- 594 Mireille
- 595 Polyxena
- 5951 Alicemonet
- 596 Scheila
- 597 Bandusia
- 598 Octavia
- 599 Luisa
- 59P/Kearns–Kwee
- 59th meridian east
- 59th meridian west
- 59th parallel north
- 59th parallel south
- 5D/Brorsen
- 5N65 radar
- 5th FAI World Rally Flying Championship
- 5th meridian east
- 5th meridian west
- 5th parallel north
- 5th parallel south
- 6 Andromedae
- 6 Aurigae
- 6 Boötis
- 6 Canis Minoris
- 6 Canum Venaticorum
- 6 Cassiopeiae
- 6 Ceti
- 6 Corvi
- 6 Draconis
- 6 Equulei
- 6 Geminorum
- 6 Hebe
- 6 Hydrae
- 6 Lacertae
- 6 Lyncis
- 6 Lyncis b
- 6 Persei
- 6 Sagittarii
- 6 Serpentis
- 6-Hydroxymelatonin
- 60 Andromedae
- 60 Aquarii
- 60 Arietis
- 60 Aurigae
- 60 Cancri
- 60 Echo
- 60 Herculis
- 60 Leonis
- 60 Sagittarii
- 60 Serpentis
- 600 Musa
- 601 Nerthus
- 602 Marianna
- 6025 Naotosato
- 603 Timandra
- 604 Tekmessa
- 6042 Cheshirecat
- 605 Juvisia
- 60558 Echeclus
- 606 Brangäne
- 6063 Jason
- 607 Jenny
- 6070 Rheinland
- 608 Adolfine
- 6084 Bascom
- 609 Fulvia
- 60P/Tsuchinshan
- 60th meridian east
- 60th meridian west
- 60th parallel north
- 60th parallel south
- 61 Aquarii
- 61 Cancri
- 61 Cygni
- 61 Danaë
- 61 Leonis
- 61 Ursae Majoris
- 61 Virginis
- 61 Virginis b
- 61 Virginis c
- 61 Virginis d
- 610 Valeska
- 6102 Visby
- 611 Valeria
- 6117 Brevardastro
- 612 Veronika
- 613 Ginevra
- 614 Pia
- 6141 Durda
- 6144 Kondojiro
- 615 Roswitha
- 6159 Andréseloy
- 616 Elly
- 617 Patroclus
- 6170 Levasseur
- 618 Elfriede
- 6181 Bobweber
- 6189 Völk
- 619 Triberga
- 61P/Shajn–Schaldach
- 61st meridian east
- 61st meridian west
- 61st parallel north
- 61st parallel south
- 62 Andromedae
- 62 Aquilae
- 62 Arietis
- 62 Aurigae
- 62 Erato
- 62 Sagittarii
- 620 Drakonia
- 621 Werdandi
- 6216 San Jose
- 622 Esther
- 6223 Dahl
- 6229 Tursachan
- 623 Chimaera
- 6235 Burney
- 6239 Minos
- 624 Hektor
- 6244 Okamoto
- 6247 Amanogawa
- 625 Xenia
- 6250 Saekohayashi
- 6255 Kuma
- 6257 Thorvaldsen
- 626 Night Market
- 626 Notburga
- 6267 Rozhen
- 627 Charis
- 628 Christine
- 629 Bernardina
- 6296 Cleveland
- 62P/Tsuchinshan
- 62nd meridian east
- 62nd meridian west
- 62nd parallel north
- 62nd parallel south
- 63 Andromedae
- 63 Aurigae
- 63 Ausonia
- 63 Ceti
- 63 Cygni
- 63 Ophiuchi
- 630 Euphemia
- 631 Philippina
- 6312 Robheinlein
- 632 Pyrrha
- 633 Zelima
- 63305 Bobkepple
- 634 Ute
- 6344 P-L
- 6349 Acapulco
- 635 Vundtia
- 636 Erika
- 637 Chrysothemis
- 6376 Schamp
- 6377 Cagney
- 638 Moira
- 639 Latona
- 6395 Hilliard
- 6398 Timhunter
- 63P/Wild
- 63rd meridian east
- 63rd meridian west
- 63rd parallel north
- 63rd parallel south
- 64 Andromedae
- 64 Angelina
- 64 Aquarii
- 64 Aquilae
- 64 Arietis
- 64 Aurigae
- 64 Draconis
- 64 Eridani
- 64 Piscium
- 64 Serpentis
- 640 Brambilla
- 641 Agnes
- 642 Clara
- 643 Scheherezade
- 6433 Enya
- 644 Cosima
- 645 Agrippina
- 646 Kastalia
- 6460 Bassano
- 6469 Armstrong
- 647 Adelgunde
- 6470 Aldrin
- 6478 Gault
- 648 Pippa
- 6489 Golevka
- 649 Josefa
- 6498 Ko
- 64P/Swift–Gehrels
- 64th meridian east
- 64th meridian west
- 64th parallel north
- 64th parallel south
- 65 Andromedae
- 65 Arietis
- 65 Aurigae
- 65 Cybele
- 65 Ursae Majoris
- 650 Amalasuntha
- 6500 Kodaira
- 651 Antikleia
- 652 Jubilatrix
- 6522 Aci
- 653 Berenike
- 6537 Adamovich
- 654 Zelinda
- 6546 Kaye
- 65489 Ceto
- 655 Briseïs
- 655th Engineer Topographic Battalion
- 656 Beagle
- 657 Gunlöd
- 658 Asteria
- 65803 Didymos
- 659 Nestor
- 65P/Gunn
- 65th meridian east
- 65th meridian west
- 65th parallel north
- 65th parallel south
- 66 Andromedae
- 66 Aquarii
- 66 Aquilae
- 66 Arietis
- 66 Aurigae
- 66 Cancri
- 66 Eridani
- 66 Maja
- 66 Ophiuchi
- 66 Tauri
- 660 Crescentia
- 661 Cloelia
- 6615 Plutarchos
- 662 Newtonia
- 663 Gerlinde
- 66391 Moshup
- 664 Judith
- 665 Sabine
- 666 Desdemona
- 66652 Borasisi
- 667 Denise
- 668 Dora
- 669 Kypria
- 66P/du Toit
- 66th meridian east
- 66th meridian west
- 66th parallel north
- 66th parallel south
- 67 Aquarii
- 67 Asia
- 67 Cancri
- 67 Ophiuchi
- 670 Ottegebe
- 6708 Bobbievaile
- 6709 Hiromiyuki
- 671 Carnegia
- 672 Astarte
- 6726 Suthers
- 673 Edda
- 674 Rachele
- 675 Ludmilla
- 676 Melitta
- 677 Aaltje
- 678 Fredegundis
- 679 Pax
- 6793 Palazzolo
- 67P/Churyumov–Gerasimenko
- 67th Academy Awards
- 67th meridian east
- 67th meridian west
- 67th parallel north
- 67th parallel south
- 68 Aquarii
- 68 Aquilae
- 68 Cygni
- 68 Draconis
- 68 Herculis
- 68 Leto
- 68 Ophiuchi
- 680 Genoveva
- 6805 Abstracta
- 681 Gorgo
- 68109 Naomipasachoff
- 682 Hagar
- 683 Lanzia
- 684 Hildburg
- 685 Hermia
- 686 Gersuind
- 687 Tinette
- 688 Melanie
- 6882 Sormano
- 689 Zita
- 68P/Klemola
- 68th meridian east
- 68th meridian west
- 68th parallel north
- 68th parallel south
- 69 Aquilae
- 69 Ceti
- 69 Herculis
- 69 Hesperia
- 69 Orionis
- 69 Virginis
- 690 Wratislavia
- 691 Lehigh
- 692 Hippodamia
- 69230 Hermes
- 693 Zerbinetta
- 694 Ekard
- 695 Bella
- 696 Leonora
- 697 Galilea
- 698 Ernestina
- 6980 Kyusakamoto
- 699 Hela
- 69P/Taylor
- 69th meridian east
- 69th meridian west
- 69th parallel north
- 69th parallel south
- 6D (2,0) superconformal field theory
- 6P/d'Arrest
- 6Q0B44E
- 6dF Galaxy Survey
- 6th meridian east
- 6th meridian west
- 6th parallel north
- 6th parallel south
- 7 Andromedae
- 7 Aquarii
- 7 Aquilae
- 7 Arietis
- 7 Boötis
- 7 Camelopardalis
- 7 Cancri
- 7 Cephei
- 7 Ceti
- 7 Comae Berenices
- 7 Draconis
- 7 Iris
- 7 Persei
- 7 Piscium
- 7 Sagittarii
- 7 Skies H3
- 7 Vulpeculae
- 70 Aquarii
- 70 Aquilae
- 70 Cancri
- 70 Ophiuchi
- 70 Panopaea
- 70 Pegasi
- 70 Virginis
- 70 Virginis b
- 700 Auravictrix
- 701 Oriola
- 702 Alauda
- 703 Noëmi
- 704 Interamnia
- 705 Erminia
- 706 Hirundo
- 7066 Nessus
- 707 Steina
- 708 Raphaela
- 7088 Ishtar
- 709 Fringilla
- 7092 Cadmus
- 70P/Kojima
- 70th meridian east
- 70th meridian west
- 70th parallel north
- 70th parallel south
- 71 Aquilae
- 71 Cygni
- 71 Niobe
- 71 Ophiuchi
- 71 Tauri
- 710 Gertrud
- 711 Marmulla
- 7119 Hiera
- 712 Boliviana
- 713 Luscinia
- 714 Ulula
- 715 Transvaalia
- 7152 Euneus
- 716 Berkeley
- 7166 Kennedy
- 7167 Laupheim
- 717 Wisibada
- 718 Erida
- 7187 Isobe
- 719 Albert
- 71P/Clark
- 71st meridian east
- 71st meridian west
- 71st parallel north
- 71st parallel south
- 72 Cygni
- 72 Feronia
- 72 Herculis
- 72 Leonis
- 72 Ophiuchi
- 72 Pegasi
- 720 Bohlinia
- 7204 Ondřejov
- 721 Tabora
- 722 Frieda
- 7225 Huntress
- 723 Hammonia
- 724 Hapag
- 725 Amanda
- 726 Joëlla
- 727 Nipponia
- 728 Leonisis
- 729 Watsonia
- 72P/Denning–Fujikawa
- 72nd meridian east
- 72nd meridian west
- 72nd parallel north
- 72nd parallel south
- 73 Klytia
- 730 Athanasia
- 731 Sorga
- 7317 Cabot
- 732 Tjilaki
- 733 Mocia
- 7336 Saunders
- 734 Benda
- 7346 Boulanger
- 735 Marghanna
- 736 Harvard
- 7369 Gavrilin
- 737 Arequipa
- 738 Alagasta
- 7385 Aktsynovia
- 7387 Malbil
- 739 Mandeville
- 73P/Schwassmann–Wachmann
- 73rd meridian east
- 73rd meridian west
- 73rd parallel north
- 73rd parallel south
- 74 Aquarii
- 74 Cygni
- 74 Galatea
- 74 Ophiuchi
- 74 Orionis
- 74 Virginis
- 740 Cantabia
- 741 Botolphia
- 742 Edisona
- 743 Eugenisis
- 744 Aguntina
- 7440 Závist
- 7449 Döllen
- 745 Mauritia
- 74503 Madola
- 746 Marlu
- 747 Winchester
- 7476 Ogilsbie
- 748 Simeïsa
- 749 Malzovia
- 74P/Smirnova–Chernykh
- 74th meridian east
- 74th meridian west
- 74th parallel north
- 74th parallel south
- 75 Cancri
- 75 Ceti
- 75 Cygni
- 75 Eurydike
- 75 Tauri
- 750 GeV diphoton excess
- 750 Oskar
- 7505 Furusho
- 751 Faïna
- 7517 Alisondoane
- 752 Sulamitis
- 7526 Ohtsuka
- 7529 Vagnozzi
- 753 Tiflis
- 754 Malabar
- 7543 Prylis
- 7545 Smaklösa
- 7548 Engström
- 755 Quintilla
- 7553 Buie
- 756 Lilliana
- 757 Portlandia
- 758 Mancunia
- 759 Vinifera
- 75D/Kohoutek
- 75th meridian east
- 75th meridian west
- 75th parallel north
- 75th parallel south
- 76 Freia
- 760 Massinga
- 7604 Kridsadaporn
- 761 Brendelia
- 762 Pulcova
- 763 Cupido
- 7638 Gladman
- 764 Gedania
- 7648 Tomboles
- 765 Mattiaca
- 7655 Adamries
- 766 Moguntia
- 767 Bondia
- 7675 Gorizia
- 768 Struveana
- 7687 Matthias
- 769 Tatjana
- 76P/West–Kohoutek–Ikemura
- 76th meridian east
- 76th meridian west
- 76th parallel north
- 76th parallel south
- 77 Aquarii
- 77 Ceti
- 77 Frigga
- 770 Bali
- 771 Libera
- 77185 Cherryh
- 772 Tanete
- 773 Irmintraud
- 774 Armor
- 7742 Altamira
- 774–775 carbon-14 spike
- 775 Lumière
- 776 Berbericia
- 777 Gutemberga
- 777 and Other Qabalistic Writings of Aleister Crowley
- 7776 Takeishi
- 778 Theobalda
- 7784 Watterson
- 779 Nina
- 7794 Sanvito
- 7796 Járacimrman
- 77P/Longmore
- 77th meridian east
- 77th meridian west
- 77th parallel north
- 77th parallel south
- 78 Aquarii
- 78 Cancri
- 78 Diana
- 78 Pegasi
- 78 Ursae Majoris
- 78 Virginis
- 780 Armenia
- 7803 Adachi
- 781 Kartvelia
- 7816 Hanoi
- 782 Montefiore
- 783 Nora
- 7835 Myroncope
- 784 Pickeringia
- 78431 Kemble
- 7846 Setvák
- 785 Zwetana
- 786 Bredichina
- 7866 Sicoli
- 787 Moskva
- 788 Hohensteina
- 78816 Caripito
- 789 Lena
- 78P/Gehrels
- 78th meridian east
- 78th meridian west
- 78th parallel north
- 78th parallel south
- 79 Cancri
- 79 Ceti
- 79 Ceti b
- 79 Eurynome
- 790 Pretoria
- 791 Ani
- 792 Metcalfia
- 793 Arizona
- 79360 Sila–Nunam
- 794 Irenaea
- 795 Fini
- 7958 Leakey
- 7959 Alysecherri
- 796 Sarita
- 7968 Elst–Pizarro
- 797 Montana
- 798 Ruth
- 799 Gudula
- 79912 Terrell
- 79P/du Toit–Hartley
- 79th meridian east
- 79th meridian west
- 79th parallel north
- 79th parallel south
- 7P/Pons–Winnecke
- 7th meridian east
- 7th meridian west
- 7th parallel north
- 7th parallel south
- 8 Andromedae
- 8 Aquarii
- 8 Aquilae
- 8 Camelopardalis
- 8 Cancri
- 8 Cygni
- 8 Draconis
- 8 Flora
- 8 Persei
- 8 Vulpeculae
- 80 Sappho
- 800 Kressmannia
- 801 Helwerthia
- 8013 Gordonmoore
- 802 Epyaxa
- 8026 Johnmckay
- 803 Picka
- 8034 Akka
- 804 Hispania
- 805 Hormuthia
- 806 Gyldénia
- 807 Ceraskia
- 808 Merxia
- 809 Lundia
- 80P/Peters–Hartley
- 80th meridian east
- 80th meridian west
- 80th parallel north
- 80th parallel south
- 81 Aquarii
- 81 Cancri
- 81 Ceti
- 81 Ceti b
- 81 Geminorum
- 81 Terpsichore
- 810 Atossa
- 811 Nauheima
- 8116 Jeanperrin
- 812 Adele
- 8121 Altdorfer
- 813 Baumeia
- 814 Tauris
- 815 Coppelia
- 816 Juliana
- 816 Nuclear Military Plant
- 817 Annika
- 818 Kapteynia
- 8187 Akiramisawa
- 819 Barnardiana
- 81P/Wild
- 81st meridian east
- 81st meridian west
- 81st parallel north
- 82 Alkmene
- 82 Aquarii
- 82 Cancri
- 82 G. Eridani
- 820 Adriana
- 821 Fanny
- 822 Lalage
- 823 Sisigambis
- 824 Anastasia
- 825 Tanina
- 826 Henrika
- 827 Wolfiana
- 828 Lindemannia
- 829 Academia
- 82P/Gehrels
- 82nd meridian east
- 82nd meridian west
- 82nd parallel north
- 83 Aquarii
- 83 Beatrix
- 83 Cancri
- 83 Leonis
- 83 Leonis Bb
- 83 Ursae Majoris
- 830 Petropolitana
- 8306 Shoko
- 831 Stateira
- 8318 Averroes
- 832 Karin
- 833 Monica
- 834 Burnhamia
- 835 Olivia
- 836 Jole
- 837 Schwarzschilda
- 8373 Stephengould
- 838 Seraphina
- 839 Valborg
- 83982 Crantor
- 83D/Russell
- 83rd meridian east
- 83rd meridian west
- 83rd parallel north
- 84 Ceti
- 84 Klio
- 840 Zenobia
- 8405 Asbolus
- 841 Arabella
- 842 Kerstin
- 843 Nicolaia
- 844 Leontina
- 8441 Lapponica
- 845 Naëma
- 846 Lipperta
- 847 Agnia
- 848 Inna
- 84882 Table Mountain
- 849 Ara
- 84P/Giclas
- 84th meridian east
- 84th meridian west
- 84th parallel north
- 85 Ceti
- 85 Io
- 85 Pegasi
- 850 Altona
- 851 Zeissia
- 852 Wladilena
- 853 Nansenia
- 854 Frostia
- 8549 Alcide
- 855 Newcombia
- 856 Backlunda
- 857 Glasenappia
- 858 El Djezaïr
- 859 Bouzaréah
- 85D/Boethin
- 85th meridian east
- 85th meridian west
- 86 Aquarii
- 86 Semele
- 860 Ursina
- 861 Aïda
- 862 Franzia
- 863 Benkoela
- 864 Aase
- 865 Zubaida
- 866 Fatme
- 8661 Ratzinger
- 867 Kovacia
- 868 Lova
- 869 Mellena
- 86P/Wild
- 86th meridian east
- 86th meridian west
- 87 Leonis
- 87 Sylvia
- 870 Manto
- 871 Amneris
- 872 Holda
- 873 Mechthild
- 874 Rotraut
- 875 Nymphe
- 876 Scott
- 877 Walküre
- 8776 Campestris
- 878 Mildred
- 879 Ricarda
- 87P/Bus
- 87th meridian east
- 87th meridian west
- 88 Aquarii
- 88 Leonis
- 88 Tauri
- 88 Thisbe
- 880 Herba
- 881 Athene
- 8815 Deanregas
- 882 Swetlana
- 883 Matterania
- 884 Priamus
- 885 Ulrike
- 886 Washingtonia
- 88611 Teharonhiawako
- 887 Alinda
- 888 Parysatis
- 889 Erynia
- 88P/Howell
- 88th meridian east
- 88th meridian west
- 89 Aquarii
- 89 Herculis
- 89 Julia
- 89 Leonis
- 89 Virginis
- 890 Waltraut
- 8900 AAVSO
- 891 Gunhild
- 892 Seeligeria
- 893 Leopoldina
- 894 Erda
- 895 Helio
- 896 Sphinx
- 8967 Calandra
- 897 Lysistrata
- 898 Hildegard
- 899 Jokaste
- 8991 Solidarity
- 8992 Magnanimity
- 89P/Russell
- 89th meridian east
- 89th meridian west
- 8P/Tuttle
- 8th meridian east
- 8th meridian west
- 8th parallel north
- 8th parallel south
- 8½
- 9 Andromedae
- 9 Aurigae
- 9 Boötis
- 9 Cephei
- 9 Ceti
- 9 Cygni
- 9 Equulei
- 9 Hydrae
- 9 Lacertae
- 9 Metis
- 9 Pegasi
- 9 Persei
- 9 Sagittarii
- 9 Star Ki
- 9 Vulpeculae
- 90 Antiope
- 90 Minutes Live
- 90 Tauri
- 900 Rosalinde
- 9000 Hal
- 901 Brunsia
- 902 Probitas
- 9023 Mnesthus
- 903 Nealley
- 90377 Sedna
- 904 Rockefellia
- 90482 Orcus
- 905 Universitas
- 906 Repsolda
- 9069 Hovland
- 907 Rhoda
- 908 Buda
- 9084 Achristou
- 909 Ulla
- 90P/Gehrels
- 90th meridian east
- 90th meridian west
- 91 Aegina
- 91 Aquarii
- 91 Aquarii b
- 910 Anneliese
- 911 Agamemnon
- 9115 Battisti
- 912 Maritima
- 913 Otila
- 914 Palisana
- 9142 Rhesus
- 915 Cosette
- 916 America
- 9165 Raup
- 917 Lyka
- 9175 Graun
- 918 Itha
- 919 Ilsebill
- 91P/Russell
- 91st meridian east
- 91st meridian west
- 92 Undina
- 920 Rogeria
- 921 Jovita
- 922 Schlutia
- 9223 Leifandersson
- 923 Herluga
- 924 Toni
- 925 Alphonsina
- 926 Imhilde
- 9260 Edwardolson
- 927 Ratisbona
- 928 Hildrun
- 929 Algunde
- 9298 Geake
- 92P/Sanguin
- 92nd meridian east
- 92nd meridian west
- 93 Herculis
- 93 Leonis
- 93 Minerva
- 930 Westphalia
- 931 Whittemora
- 932 Hooveria
- 9321 Alexkonopliv
- 933 Susi
- 934 Thüringia
- 9344 Klopstock
- 935 Clivia
- 936 Kunigunde
- 937 Bethgea
- 938 Chlosinde
- 939 Isberga
- 93P/Lovas
- 93rd meridian east
- 93rd meridian west
- 94 Aquarii
- 94 Aurora
- 94 Ceti
- 94 Ceti b
- 94 Piscium
- 940 Kordula
- 941 Murray
- 942 Romilda
- 9423 Abt
- 943 Begonia
- 944 Hidalgo
- 945 Barcelona
- 946 Poësia
- 947 Monterosa
- 948 Jucunda
- 949 Hel
- 94P/Russell
- 94th meridian east
- 94th meridian west
- 95 Arethusa
- 950 Ahrensa
- 951 Gaspra
- 95179 Berkó
- 952 Caia
- 9524 O'Rourke
- 953 Painleva
- 954 Li
- 9549 Akplatonov
- 955 Alstede
- 956 Elisa
- 9564 Jeffwynn
- 957 Camelia
- 958 Asplinda
- 959 Arne
- 95th meridian east
- 95th meridian west
- 96 Aegle
- 96 Aquarii
- 960 Birgit
- 961 Gunnie
- 9617 Grahamchapman
- 962 Aslög
- 963 Iduberga
- 964 Subamara
- 9641 Demazière
- 965 Angelica
- 966 Muschi
- 967 Helionape
- 968 Petunia
- 969 Leocadia
- 9694 Lycomedes
- 96P/Machholz
- 96th meridian east
- 96th meridian west
- 97 Aquarii
- 97 Klotho
- 970 Primula
- 971 Alsatia
- 9712 Nauplius
- 972 Cohnia
- 973 Aralia
- 974 Lioba
- 975 Perseverantia
- 976 Benjamina
- 9767 Midsomer Norton
- 977 Philippa
- 978 Aidamina
- 979 Ilsewa
- 97P/Metcalf–Brewington
- 97th meridian east
- 97th meridian west
- 98 Aquarii
- 98 Herculis
- 98 Ianthe
- 980 Anacostia
- 981 Martina
- 982 Franklina
- 9826 Ehrenfreund
- 983 Gunila
- 984 Gretia
- 9844 Otani
- 985 Rosina
- 986 Amelia
- 987 Wallia
- 988 Appella
- 989 Schwassmannia
- 98P/Takamizawa
- 98th meridian east
- 98th meridian west
- 99 Aquarii
- 99 Dike
- 99 Herculis
- 99 Women
- 990 Yerkes
- 9902 Kirkpatrick
- 9903 Leonhardt
- 9905 Tiziano
- 9909 Eschenbach
- 991 McDonalda
- 9910 Vogelweide
- 9912 Donizetti
- 9916 Kibirev
- 992 Swasey
- 9921 Rubincam
- 993 Moultona
- 9931 Herbhauptman
- 9936 Al-Biruni
- 993–994 carbon-14 spike
- 994 Otthild
- 9949 Brontosaurus
- 995 Sternberga
- 9950 ESA
- 9951 Tyrannosaurus
- 996 Hilaritas
- 9963 Sandage
- 9965 GNU
- 9968 Serpe
- 9969 Braille
- 997 Priska
- 9971 Ishihara
- 998 Bodea
- 9983 Rickfienberg
- 999 Zachia
- 99906 Uofalberta
- 9991 Anežka
- 9994 Grotius
- 99942 Apophis
- 9999 Wiles
- 99P/Kowal
- 99th meridian east
- 99th meridian west
- 9Spitch
- 9th meridian east
- 9th meridian west
- 9th parallel north
- 9th parallel south
- A Aquarii
- A Beautiful Friendship (novel)
- A Beautiful Planet
- A Blink of the Screen
- A Book on Nymphs, Sylphs, Pygmies, and Salamanders, and on the Other Spirits
- A Boy and His Blob
- A Boy and His Blob: Trouble on Blobolonia
- A Brief History of Rocketry in ISRO
- A Brief History of Time
- A Brief History of Time (film)
- A Briefer History of Time (Hawking and Mlodinow book)
- A Bucket of Blood
- A Cancri
- A Carinae
- A Case of Conscience
- A Celestial Atlas
- A Centauri
- A Centauri (disambiguation)
- A Certain Sacrifice
- A Christmas Carol
- A Christmas Carol (2017 play)
- A Christmas Dream
- A Cinderella Story
- A Clone of My Own
- A Cold Wind in August
- A Confusion of Princes
- A Cosmic Christmas
- A Dangerous Method
- A Device of Death
- A Disney Halloween
- A Dog's Breakfast
- A Dog, a Mouse, and a Sputnik
- A Dream (Blake poem)
- A Dream (DeBarge song)
- A Dream (short story)
- A Dream Is a Wish Your Heart Makes
- A Fall of Moondust
- A Far Sunset
- A Farewell to Arms (Futurama)
- A Field Guide to the Birds of Hawaii and the Tropical Pacific
- A Fire in the Sky
- A Flame in Hali
- A Flight to Remember
- A Forest Apart
- A Funny Thing Happened on the Way to the Moon
- A Gift from Earth
- A Gift from the Culture
- A Gift of Dragons
- A Grand Day Out
- A Great Day for Freedom
- A Gun for Jennifer
- A Guy Called Gerald
- A Hat Full of Sky
- A History Channel Thanksgiving
- A History of the Kerala School of Hindu Astronomy
- A Hole in Texas
- A Hydrae
- A Journal of Insomnia
- A Journey in Other Worlds
- A Kiss to Build a Dream On
- A Klingon Christmas Carol
- A Man Has Dreams
- A Man on the Moon
- A Martian Christmas
- A Martian Odyssey
- A Matter of Time (Star Trek: The Next Generation)
- A Matter of Traces
- A Message from Mars (1913 film)
- A Message from Mars (play)
- A Million Open Doors
- A Miracle of Science
- A Modern Utopia
- A Mother's Confession
- A Mystery for Mr. Bass
- A New Machine
- A Night in the Lonesome October
- A Night to Dismember
- A Nightmare on Elm Street
- A Nightmare on Elm Street (franchise)
- A Nightmare on Face Time
- A Pail of Air
- A Passage to Infinity
- A Piece of the Action (film)
- A Pillow of Winds
- A Planet for Texans
- A Planet in Arms
- A Prophetic Romance
- A Pumpkin Full of Nonsense
- A Puppis
- A Question and Answer Guide to Astronomy
- A Rose for Ecclesiastes
- A Saucerful of Secrets (instrumental)
- A Serpentis
- A Sidewalk Astronomer
- A Simple Response to an Elemental Message
- A Sky Full of Ghosts
- A Spaceman Came Travelling
- A Spoonful of Sherman
- A Symphony of Lights
- A Tale of Two Santas
- A Tauri
- A Tenderfoot in Space
- A Tourist Guide to Lancre
- A Treatise on the Astrolabe
- A Trip to Mars
- A Trip to the Moon
- A Trip to the Moon (Chronicle)
- A Trip to the Moon (attraction)
- A True Story
- A Universe from Nothing
- A Velorum
- A Very Wicked Halloween
- A Vision
- A Vision of Judgment
- A Voyage to Arcturus
- A Wise Old Owl
- A Wizard of Mars
- A Woman of the Iron People
- A World Out of Time
- A World of Difference (novel)
- A Wrinkle in Time
- A Wrinkle in Time (2003 film)
- A Wrinkle in Time (2018 film)
- A come Andromeda
- A for Andromeda
- A Árvore dos Sexos
- A-001
- A-002
- A-003
- A-004
- A-Haunting We Will Go (1966 film)
- A-okay
- A-train (satellite constellation)
- A-type asteroid
- A-type main-sequence star
- A. David Andrews
- A. David Thackeray
- A. E. Cogswell
- A. E. Douglass
- A. E. Sewell
- A. Grace Cook
- A. J. After Hours
- A. J. Balaban
- A. J. R. Russell-Wood
- A. L. Narayan
- A. Langley Searles
- A. W. Ecclestone
- A.G. Huntsman Award for Excellence in the Marine Sciences
- A.I. Rising
- A.J. Drexel Plasma Institute
- A.M. 180
- A0620-00
- A1689-zD1
- A1689B11
- A1703 zD6
- A2261-BCG
- A2744 YD4
- AA Tauri
- AAG Gold Medal
- AANAT (gene)
- AAPG Bulletin
- AATSR
- AAU CubeSat
- AAUSAT-II
- AAUSAT3
- AB Andromedae
- AB Aurigae
- AB Doradus
- AB Doradus moving group
- AB Pictoris
- AB magnitude
- AB7
- AB8 (star)
- ABC Warriors
- ABC's Wide World of Entertainment
- ABISMO
- ABJM superconformal field theory
- ABRIXAS
- ABS (satellite operator)
- ABS-3
- ABS-3A
- ABS-7
- AC 00-69
- AC 20-115
- AC 20-152
- AC 25.1309-1
- AC Andromedae
- AC Herculis
- ACARS
- ACIGA
- ACRIMSAT
- ACTS Gigabit Satellite Network
- ACeS
- AD Andromedae
- AD Leonis
- AD Phoenicis
- ADAHELI
- ADCIRC
- ADEOS I
- ADEOS II
- ADL astronomical society
- ADM formalism
- ADM-Aeolus
- ADMS 3
- ADRON-RM
- ADS 1359
- ADS 16402
- ADS 48
- ADS 7251
- ADS 9731
- ADS Group
- AE Andromedae
- AE Aquarii
- AE Aurigae
- AE Phoenicis
- AE Pictoris
- AE: Apocalypse Earth
- AEDC Range G
- AEGIS (astronomy)
- AERCam Sprint
- AERMOD
- AEROS (satellite)
- AESP-14
- AFGL 2298
- AFGL 2591
- AFM-IR
- AFP-675
- AG Carinae
- AG Draconis
- AG Pegasi
- AGC 198691
- AGILE (satellite)
- AGSA Lab
- AGT correspondence
- AH Scorpii
- AH Velorum
- AI Phoenicis
- AI: The Somnium Files
- AIDA (mission)
- AIGO
- AIMStar
- AINUR
- AIPS++
- AISSat-1
- AJ10
- AK Leporis
- AK Pictoris
- AK Pyxidis
- AK Scorpii
- ALEGRA
- ALF (TV series)
- ALF's Hit Talk Show
- ALF: The Animated Series
- ALFALFA
- ALICE (accelerator)
- ALICE (propellant)
- ALMASat-1
- ALOS-2
- ALSE
- ALTIUS
- ALV X-1
- AM 0644-741
- AM 1316-241
- AM Canum Venaticorum
- AM Canum Venaticorum star
- AM Herculis
- AM2R
- AMADEE-18
- AMBA (animated film)
- AMBER (Very Large Telescope)
- AMC-1
- AMC-11
- AMC-14
- AMC-18
- AMC-2
- AMC-21
- AMC-3
- AMC-4
- AMC-5
- AMC-6
- AMC-7
- AMC-8
- AMC-9
- AMOS (satellite bus)
- AMSAT-OSCAR 10
- AMSAT-OSCAR 16
- AMSAT-OSCAR 51
- AMSAT-OSCAR 6
- AMSAT-OSCAR 7
- AMiBA
- AN Ursae Majoris
- AN/AAQ-37
- AN/AAR-47 Missile Approach Warning System
- AN/APG-65 radar family
- AN/APG-68
- AN/APG-76
- AN/APG-77
- AN/APY-10
- AN/USQ-20
- AN/ZPY-1
- ANAIS
- ANARESAT
- ANASIS-II
- ANDROS
- ANNA 1B
- ANSMET
- ANTARES (telescope)
- ANUGA Hydro
- ANUSAT
- AO Cassiopeiae
- AO Mensae
- AP 42 Compilation of Air Pollutant Emission Factors
- AP Columbae
- APM 08279+5255
- AQT-D
- AQUAL
- AR Andromedae
- AR Aurigae
- AR Cassiopeiae
- AR Scorpii
- AR12665
- ARC Centre of Excellence for All-Sky Astrophysics
- ARC Squadron
- ARCADE
- ARCAspace
- ARCTIC (ISS Facility)
- ARGOS (optics system)
- ARGOS (satellite)
- ARGOS DSS
- ARIANNA Experiment
- ARIEL
- ARINC
- ARINC 629
- ARINC 818
- ARINC 826
- ARINC 828
- ARO 12m Radio Telescope
- ARP4754
- ARS (rocket family)
- ARSAT
- ARSAT SG-1
- ARSAT-1
- ARSAT-2
- ARSAT-3K
- ART-XC
- ARTE (Thermal Exchange)
- ARTES
- AS 314
- AS-101
- AS-102
- AS-103
- AS-104
- AS-105
- AS-201
- AS-202
- AS-203
- ASARS-2
- ASASSN-15lh
- ASASSN-19bt
- ASASSN-V J213939.3-702817.4
- ASASSN1
- ASAT program of China
- ASC Purple
- ASC-15
- ASCAMP
- ASCI Blue Pacific
- ASCI Red
- ASCI White
- ASCOM (standard)
- ASM-135 ASAT
- ASN Hotel Building
- ASSET (spacecraft)
- ASTELCO
- ASTER (spacecraft)
- ASTERIA (spacecraft)
- ASTOS
- ASTRO (satellite)
- ASTRON
- ASUSat
- AT Microscopii
- AT2019qiz
- ATB
- ATHLETE
- ATLAS-I
- ATLO
- ATP test
- ATREX
- ATS-1
- ATS-2
- ATS-3
- ATS-4
- ATS-6
- ATSTEP
- AU Microscopii
- AURIGA
- AUSTAL2000
- AV Microscopii
- AVCOAT
- AVH: Alien vs. Hunter
- AVIATR
- AW Canum Venaticorum
- AX Circini
- AXIS Flight Training Systems
- AXP 1E 1048-59
- AXe Spectral Extraction
- AZ Cancri
- AZ Canis Minoris
- AZ Phoenicis
- Aalto-1
- Aamon
- Aang
- Aarhus (meteorite)
- Aaron Loves Angela
- Aaron Parsons
- Aaron Yazzie
- Ab urbe condita
- Abaangui
- Ababinili
- Abaddon's Gate
- Abadox
- Abalos Colles
- Abalos Mensa
- Abalos Undae
- Aban
- Abandoned mine drainage
- Abandonment (mysticism)
- Abar, the First Black Superman
- Abaya Lacus
- Abba Mari ben Eligdor
- Abbas Wasim Efendi
- Abbatija Tad-Dejr
- Abbe (crater)
- Abbe Lane
- Abbey Lounge
- Abbie Hutty
- Abbot (crater)
- Abbott and Costello Go to Mars
- Abby (film)
- Abd al-Rahman al-Fasi
- Abd al-Rahman al-Jadiri
- Abd al-Rahman al-Sufi
- Abd al‐Wajid
- Abd as-Salam al-Alami
- Abduction (1975 film)
- Abdul Karim (soil scientist)
- Abdul Rashid (agriculturist)
- Abdus Salam
- Abdus Salam Centre for Physics
- Abe (Oddworld)
- Abe Saffron
- Abe Silverstein
- Abedin (crater)
- Abee (meteorite)
- Abeir-Toril
- Abel (crater)
- Abel Méndez
- Abell 1146
- Abell 1185
- Abell 12
- Abell 1201 BCG
- Abell 13
- Abell 133
- Abell 1413
- Abell 1689
- Abell 1795
- Abell 1835
- Abell 1835 IR1916
- Abell 1991
- Abell 2029
- Abell 2061
- Abell 2065
- Abell 2067
- Abell 2142
- Abell 2147
- Abell 2152
- Abell 2162
- Abell 2163
- Abell 2199
- Abell 2218
- Abell 222
- Abell 223
- Abell 2256
- Abell 2261
- Abell 2390
- Abell 2597
- Abell 262
- Abell 2667
- Abell 2744
- Abell 2744 Y1
- Abell 31
- Abell 3266
- Abell 33
- Abell 3411
- Abell 3412
- Abell 36
- Abell 370
- Abell 3742
- Abell 383
- Abell 39
- Abell 400
- Abell 478
- Abell 520
- Abell 569
- Abell 576
- Abell 665
- Abell 671
- Abell 7
- Abell 70
- Abell 754
- Abell 78
- Abell 907
- Abell Catalog of Planetary Nebulae
- Abell S1063
- Abell S1077
- Abell S740
- Abell catalogue
- Abenezra (crater)
- Abeona Mons
- Aber Dinlle Fault
- Aberconway Medal
- Abercrombie Station
- Abergavenny fireworks display
- Aberration (astronomy)
- Abetti (crater)
- Abhijit (nakshatra)
- Abigail Allwood
- Abiogenesis
- Abiogenic petroleum origin
- Abiotic component
- Abir Al-Tabbaa
- Abisme (crater)
- Abiyun al-Bitriq
- Ablation
- Ablation zone
- Ablution in Christianity
- Abolfadl Harawi
- Abora (deity)
- Aboriginal stone arrangement
- Above & Beyond (band)
- Above and Below
- Above and Beyond: The Encyclopedia of Aviation and Space Sciences
- Abraham H. Taub
- Abraham Pihl
- Abraham Robertson
- Abraham Zacuto
- Abraham Zelmanov
- Abraham bar Hiyya
- Abraham ibn Ezra
- Abraham's Well
- Abrahão de Moraes
- Abrams Planetarium
- Abrasion (geology)
- Abraxas, Guardian of the Universe
- Abrotelia
- Absolute dating
- Absolute horizon
- Absolute magnitude
- Absolute space and time
- Absolutely Anything
- Absolution Gap
- Absorbance
- Absorptance
- Absorption (chemistry)
- Absorption (electromagnetic radiation)
- Absorption band
- Absorption heat pump
- Absorption of water
- Absorption spectroscopy
- Abstract differential geometry
- Abtew Method
- Abu 'Ali al-Khayyat
- Abu Ali al-Hasan al-Marrakushi
- Abu Hanifa Dinawari
- Abu Ishaq al-Kubunani
- Abu Ja'far al-Khazin
- Abu Ja'far ibn Habash
- Abu Ma'shar
- Abu Muhammad al-Hasan al-Hamdani
- Abu Muqri Mohammed al-Battiwi
- Abu Nasr Mansur
- Abu Nuwas (crater)
- Abu Said Gorgani
- Abu al-Abbas Iranshahri
- Abu al-Hasan al-Ahwazi
- Abu al-Majd ibn Abi al-Hakam
- Abu al-Salt
- Abu al-Wafa' Buzjani
- Abu'l-'Anbas Saymari
- Abu'l-Hasan Bayhaqi
- Abu-Mahmud Khojandi
- Abubakar Kundiri
- Abul Wafa (crater)
- Abulfeda
- Abulfeda (crater)
- Abundance of elements in Earth's crust
- Abundance of the chemical elements
- Abyss (Denning novel)
- Abyss Box
- Abū Ishāq Ibrāhīm al-Zarqālī
- Abū Sahl al-Qūhī
- Abū al‐ʿUqūl
- Academia Sinica Institute of Astronomy and Astrophysics
- Academy (video game)
- Academy of Climate Change Education and Research
- Académie de l'air et de l'espace
- Acanthocereus tetragonus
- Acanthopleuribacter
- Acaryochloris marina
- Accelerando
- Accelerating expansion of the universe
- Accelerator Neutrino Neutron Interaction Experiment
- Acceptable daily intake
- Accession (Star Trek: Deep Space Nine)
- Accessory to War
- Accidental dignity
- Accidental release source terms
- Acción mutante
- Acclimatization
- Accretion (astrophysics)
- Accretion (coastal management)
- Accretion disk
- Accruva Formation
- Accumulation zone
- Ace Combat 04: Shattered Skies
- Ace Combat Infinity
- Ace Combat: Assault Horizon
- Ace Hotel Los Angeles
- Acebrochol
- Acecarbromal
- Acetobacterium carbinolicum
- Achelous (crater)
- Achernar
- Acheron Fossae
- Achill-henge
- Achilles Papapetrou
- Achim Schwenk
- Achita (crater)
- Achlys
- Achmet (oneiromancer)
- Acholeplasma
- Achondrite
- Achromatic telescope
- Achuguayo
- Achyutananda
- Acid neutralizing capacity
- Acid orange 5
- Acid rain
- Acid sulfate soil
- Acidalia Colles
- Acidianus
- Acidianus infernus
- Acidianus sulfidivorans
- Acidihalobacter prosperus
- Acidilobales
- Acidilobus
- Acidilobus aceticus
- Acidilobus saccharovorans
- Acidimicrobium ferrooxidans
- Acidipila rosea
- Acidiplasma
- Aciditerrimonas ferrireducens
- Acidithiobacillales
- Acidithrix ferrooxidans
- Acidobacteria
- Acidobacterium capsulatum
- Acidophile
- Acidophiles in acid mine drainage
- Aciduliprofundum
- Aciduliprofundum boonei
- Ackerly meteorite
- Acme zone
- Acosta (crater)
- Acoustic levitation
- Acoustic metric
- Acoustic paramagnetic resonance
- Acoustic release
- Acoustic resonance spectroscopy
- Acoustic seabed classification
- Acoustical oceanography
- Acoustically Navigated Geological Underwater Survey
- Acousto-optical spectrometer
- Acousto-optics
- Acqua alta
- Acquainted with the Night (book)
- Acraman crater
- Acrion
- Acrisol
- Acrodynia
- Acronical place
- Acronyms and abbreviations in avionics
- Across 110th Street
- Across a Billion Years
- Across the Sea of Suns
- Across the Universe (message)
- Across the Zodiac
- Acrotelm
- Acrux
- Act of God (film)
- Act of Vengeance (1974 film)
- Acta Agriculturae Scandinavica B
- Acta Astronautica
- Acta Astronomica
- Acta Geographica Slovenica
- Acta Geologica Polonica
- Actaea (moon)
- Actigraphy
- Actinometer
- Actinopolyspora xinjiangensis
- Actinorhizal plant
- Action Jackson (1988 film)
- Action Quake 2
- Action for Climate Empowerment
- Action spectrum
- Activated charcoal (medication)
- Activation-synthesis hypothesis
- Active SETI
- Active asteroid
- Active cavity radiometer
- Active galactic nucleus
- Active layer
- Active optics
- Active surface
- Actun Tunichil Muknal
- Acute Exposure Guideline Levels
- Acute inhalation injury
- Acute to chronic ratio
- Acute toxicity
- Ad Astra (film)
- Ad Astra (magazine)
- Ad Astra Rocket Company
- AdS black hole
- AdS/CFT correspondence
- AdS/CMT correspondence
- AdS/QCD correspondence
- Ada Leonard
- Adaheli
- Adakite
- Adalard of Corbie
- Adalbert Krueger
- Adam & Eve, Birmingham
- Adam A500
- Adam Becker
- Adam Frank
- Adam Freeland
- Adam Hollanek
- Adam Johann von Krusenstern
- Adam Prazmowski
- Adam Riess
- Adam Roberts (British writer)
- Adam S. T. Thomson
- Adam Savage
- Adam Steltzner
- Adam Strange
- Adam Woodyatt
- Adam and Eve
- Adamastor Ocean
- Adams (Martian crater)
- Adams (lunar crater)
- Adams–Williamson equation
- Adapter (rocketry)
- Adaptive optics
- Addams (crater)
- Adderall
- Addison Bain
- Address: Centauri
- Addressed fiber Bragg structure
- Adekagagwaa
- Adela Ringuelet
- Adelard of Bath
- Adeleorina
- Adelie Land meteorite
- Adelina Gutiérrez
- Adeline (rocket stage)
- Ademar José Gevaerd
- Aden Meinel
- Adeona family
- Adhi Kot (meteorite)
- Adhi yoga
- Adhik Maas
- Adhil
- Adiabatic invariant
- Adinazolam
- Adinkra symbols (physics)
- Adiri (Titan)
- Adirondack (Mars)
- Adirondack Mountains
- Adithyapuram Sun Temple
- Aditi Pant
- Aditya-L1
- Adivar (crater)
- Adiós Amigo
- Adjustable bed
- Adler Planetarium
- Adlinda (crater)
- Admiral (train)
- Admiralty chart
- Adolescent sleep
- Adolf Berberich
- Adolf Grünbaum
- Adolf Overweg
- Adolf Thiel
- Adolfo Figueroa-Viñas
- Adolph Friedrich Lindemann
- Adolph Gottfried Kinau
- Adolphe Hirsch
- Adolphe Quetelet
- Adolphe Rome
- Adonis
- Adoudounian
- Adrastea (moon)
- Adrenaline (film)
- Adriaan Blaauw
- Adriaan Wesselink
- Adriaan van Maanen
- Adrian Berry, 4th Viscount Camrose
- Adrian Luckman
- Adrian Melott
- Adrian Ponce
- Adrian R. Morrison
- Adrian Rodriguez (DJ)
- Adriana Ocampo
- Adrianne Curry
- Adrift (video game)
- Adrián Galád
- Adsorbable organic halides
- Adsorption
- Adsorption/Bio-oxidation process
- Adult Swim (Canadian TV network)
- Adult movie theater
- Advanced Aerospace Threat Identification Program
- Advanced Airborne Sensor
- Advanced Avionics Module
- Advanced CCD Imaging Spectrometer
- Advanced Composition Explorer
- Advanced Concepts Team
- Advanced Cryogenic Evolved Stage
- Advanced Electric Propulsion System
- Advanced Extremely High Frequency
- Advanced Gemini
- Advanced LIGO Documentary Project
- Advanced Land Observation Satellite
- Advanced Launch System
- Advanced Photon Source
- Advanced Photovoltaic & Electronic Experiment
- Advanced Propulsion Physics Laboratory
- Advanced Research and Conventional Technology Utilization Spacecraft
- Advanced Rocket Research Center
- Advanced Satellite for Cosmology and Astrophysics
- Advanced Scientific Data Format
- Advanced Space Propulsion Investigation Committee
- Advanced Space Vision System
- Advanced Spaceborne Thermal Emission and Reflection Radiometer
- Advanced Stirling radioisotope generator
- Advanced Tactical Airborne Reconnaissance System
- Advanced Technology Vehicle
- Advanced Telescope for High Energy Astrophysics
- Advanced Thin Ionization Calorimeter
- Advanced fire information system
- Advanced microwave sounding unit
- Advanced oxidation process
- Advanced sleep phase disorder
- Advanced very-high-resolution radiometer
- Advances in Atmospheric Sciences
- Advances in Space Research
- Advection
- Advent Rising
- Advent Shadow
- Adventure Rupes
- Adventure Science Center
- Adventure Thru Inner Space
- Adventure Time (short film)
- Adverse outcome pathway
- Advisory circular
- Adzhi-Bogdo
- Aegaeon (moon)
- Aegir (moon)
- Aelita
- Aelita (novel)
- Aeolian processes
- Aeolis Mensae
- Aeolis Palus
- Aepinus (crater)
- Aequorivita crocea
- Aerenchyma
- Aerial Common Sensor
- Aerial Phenomena Research Organization
- Aerial Regional-scale Environmental Survey
- Aerial base station
- Aerial photographic and satellite image interpretation
- Aerial telescope
- Aerial video
- Aerials (film)
- Aero Spacelines Pregnant Guppy
- Aero Spacelines Super Guppy
- AeroCube 3
- Aerobee
- Aerobic denitrification
- Aerobic granulation
- Aerobraking
- Aerocapture
- Aerodynamic heating
- Aerodynamic levitation
- Aerogravity assist
- Aerojet General X-8
- Aerometer
- Aeronautical Telecommunication Network
- Aeronautical and Space Medicine Unit
- Aeronautics Research Mission Directorate
- Aeronomy
- Aeronomy of Ice in the Mesosphere
- Aeropause
- Aeroponics
- Aeropyrum
- Aeropyrum pernix
- Aeroshell
- Aerospace Force of the Islamic Revolutionary Guard Corps
- Aerospace Logistics Technology Engineering Company
- Aerospace Medical Association
- Aerospace Research Institute
- Aerospace manufacturer
- Aerospaceplane
- Aerotech Consumer Aerospace
- Aesara
- Aestivation
- Aestivation hypothesis
- Aestuariibacter halophilus
- Aestus
- Aether (classical element)
- Aether (video game)
- Aethiopian Sea
- Affine gauge theory
- Affine vector field
- Affleck–Dine mechanism
- Affliction (1997 film)
- Affusion
- Afghanistan
- Afghansat 1
- Afocal photography
- AfriStar
- Africa Addio
- African Geographical Review
- African Journal of Marine Science
- African Skies (journal)
- African trypanosomiasis
- Africanism All Stars
- Africanus Horton (crater)
- Afro-Eurasia
- Afrotropical realm
- Afroz Ahmad
- Aft-crossing trajectory
- After Earth
- After School Massacre
- After Worlds Collide
- After the Deluge (painting)
- After the Disco (song)
- After the Gold Rush (song)
- Afterhours club
- Afterimage (Star Trek: Deep Space Nine)
- Aftermath (Muse song)
- Agada
- Against a Dark Background
- Against a Dwarf
- Against the Law (1997 film)
- Aganippe Fossa
- Agassiz (crater)
- Agate (rocket)
- Agatharchides (crater)
- Agave amica
- Age (geology)
- Age of Aquarius
- Age of Ascent
- Age of Earth
- Age of Wonders: Planetfall
- Age of the Gods
- Age of the universe
- AgeHa
- Agen (meteorite)
- Agena target vehicle
- Agencia Espacial Mexicana
- Agent Steel
- Agent of Vega
- Agents of S.H.I.E.L.D.
- Agents of S.H.I.E.L.D. series finale
- Ageostrophy
- Aggañña Sutta
- Agglomerate
- Aggradation
- Aggregat (rocket family)
- Aggregate (geology)
- Aggregatibacter actinomycetemcomitans
- Aggregation-induced emission
- Agila-1
- Aglaonice
- Aglibol
- Agnes Giberne
- Agnes Mary Clerke
- Agnesi (crater)
- Agni
- Agni-V
- Agni-VI
- AgniKul Cosmos
- Agnieszka Fryckowska
- Agniswarar Temple, Kanjanur
- Agnès Acker
- Agnès Fienga
- Agostino Giuntoli
- Agostino Maccari
- Agrahayana
- Agrat bat Mahlat
- Agreement Concerning Cooperation in the Exploration and Use of Outer Space for Peaceful Purposes
- Agreement on the Conservation of Populations of European Bats
- Agricultural Conservation Program
- Agricultural and Forest Meteorology
- Agricultural astrology
- Agricultural pollution
- Agricultural soil science
- Agricultural wastewater treatment
- Agriculture, Ecosystems & Environment
- Agrippa (crater)
- Agrivoltaic
- Agrochemical
- Agroecology
- Agrogeology
- Agrology
- Agrominerals
- Agudar
- Ah Peku Patera
- Ahmad (crater)
- Ahmad Baba (crater)
- Ahmad Nahavandi
- Ahmad ibn Yusuf
- Ahmed Abukhater
- Ahmed Farid
- Ahmed Romel
- Ahmed Zewail
- Ahuna Mons
- Aichelburg–Sexl ultraboost
- Aiden Ford
- Aigarchaeota
- Aigle (rocket)
- Aiken-Augusta Special
- Aikhulu Chasma
- Ailey (crater)
- Ailill Aulom
- Aimend
- Aimé Michel
- Aina Elvius
- Aintab plateau
- Ainu creation myth
- Air (classical element)
- Air Force Maui Optical and Supercomputing observatory
- Air Force Space Command
- Air Force Space and Missile Museum
- Air Power Park
- Air Quality Modeling Group
- Air compressor
- Air data computer
- Air data inertial reference unit
- Air data module
- Air mass (astronomy)
- Air mass (solar energy)
- Air mattress
- Air pollution episode
- Air quality index
- Air raid shelter
- Air shower (physics)
- Air traffic control radar beacon system
- Air well (condenser)
- Air-ground radiotelephone service
- Air-launch-to-orbit
- Air-wedge shearing interferometer
- AirLaunch
- AirNav Systems
- AirStrato
- Airbomb
- Airborne Internet
- Airborne Launch Assist Space Access
- Airborne Maintenance & Engineering Services
- Airborne Precision Spacing
- Airborne Real-time Cueing Hyperspectral Enhanced Reconnaissance
- Airborne collision avoidance system
- Airborne observatory
- Airborne visible/infrared imaging spectrometer
- Airborne wind shear detection and alert system
- Airbus Defence and Space
- Airbus Defence and Space Spaceplane
- Airbus Military
- Aircraft Operations Center
- Aircraft station
- Airdrie Public Observatory
- Airfone
- Airforce Delta Strike
- Airglow
- Airlock
- Airplane II: The Sequel
- Airplane Information Management System
- Airplane mode
- Airship
- Airsprung
- Airy (Martian crater)
- Airy (lunar crater)
- Airy disk
- Airy-0
- Aist 1
- Aitken (crater)
- Aitken Double Star Catalogue
- Aitne (moon)
- Aiśvarya
- Ajanbahu (term)
- Ajaw
- Ajit Kembhavi
- Ak-Sar-Ben Zephyr
- Akaa Solar System Scale Model
- Akadama
- Akakor
- Akari (satellite)
- Akash Mitra Mandal
- Akasha
- Akatsuki (spacecraft)
- Akatsuki (train)
- Akbarpur (meteorite)
- Akebono (satellite)
- Akebono (train)
- Akeno Giant Air Shower Array
- Akeno Observatory
- Akhanda Samrajya yoga
- Akihiko Hoshide
- Akihiko Tago
- Akiira Geothermal Limited
- Akimasa Nakamura
- Akimotoite
- Akino Arai
- Akino Memorial Research
- Akitsune Imamura
- Akna Montes
- Akon Lighting Africa
- Aksakov (crater)
- Akutagawa (crater)
- Akycha
- Al Achsasi al Mouakket
- Al B. Rich
- Al Calavicci
- Al Farabi-1
- Al Howard
- Al Thalimain
- Al Yah Satellite Communications
- Al-Adami
- Al-Akhtal (crater)
- Al-Ashraf Umar II
- Al-Badi' al-Asturlabi
- Al-Bakbuk
- Al-Bakri (crater)
- Al-Battani
- Al-Birjandi
- Al-Biruni
- Al-Biruni (crater)
- Al-Dhira'
- Al-Fadl ibn Naubakht
- Al-Fakik
- Al-Farghani
- Al-Haddar
- Al-Hakim al-Munajjim
- Al-Hamadhani (crater)
- Al-Isfizari
- Al-Jāhiz (crater)
- Al-Kharaqī
- Al-Khawarizmi Astronomy Complex
- Al-Khazini
- Al-Khwarizmi (crater)
- Al-Kindi
- Al-Kutbay
- Al-Kuz
- Al-Mahani
- Al-Marrakushi (crater)
- Al-Mustazi
- Al-Nayrizi
- Al-Qabisi
- Al-Qaum
- Al-Saghani
- Al-Samawal al-Maghribi
- Al-Sijzi
- Al-Ta'ir (satellite)
- Al-Wabkanawi
- Al-Ḥajjāj ibn Yūsuf ibn Maṭar
- Al. Ringling Theatre
- AlSAT-1
- Ala Macula
- Aladdin (crater)
- Aladin Sky Atlas
- Aladino Félix
- Alain Gachet
- Alain Le Bussy
- Alain Manesson Mallet
- Alain Maury
- Alais meteorite
- Alam al-Din al-Hanafi
- Alameda Theatre (Alameda, California)
- Alan Aldridge
- Alan Andrew Watson
- Alan Bean
- Alan Bond (engineer)
- Alan Boss
- Alan C. Gilmore
- Alan Dressler
- Alan Duffy (astronomer)
- Alan Eustace
- Alan G. Poindexter
- Alan Godfrey
- Alan Guth
- Alan Gutierrez
- Alan Hale (astronomer)
- Alan Leo
- Alan Lindenmoyer
- Alan M. Clark
- Alan N. Shapiro
- Alan Priddy
- Alan R. Hildebrand
- Alan Riding
- Alan Shepard
- Alan Soper
- Alan Stern
- Alan Tracy
- Alan William James Cousins
- Alan's Psychedelic Breakfast
- Alar Toomre
- Alarm clock
- Alaska Satellite Facility
- Alaska Volcano Observatory
- Alastair G. W. Cameron
- Alastor Cluster
- Alazan (rocket)
- Alba Mons
- Alba Orbital
- Albano Lacus
- Albany Progress
- Albareto (meteorite)
- Albategnius (crater)
- Albatross (Star Trek: The Animated Series)
- Albatross expedition
- Albedo
- Albedo feature
- Albeluvisols
- Albergo diurno Venezia
- Albert (crater)
- Albert Bijaoui
- Albert Brudzewski
- Albert Curtz
- Albert Einstein
- Albert Einstein ATV
- Albert F. A. L. Jones
- Albert Falsan
- Albert George Wilson
- Albert Graham Ingalls
- Albert H. Crews
- Albert Hibbs
- Albert I, Prince of Monaco
- Albert K. Bender
- Albert Lancaster
- Albert Le Sueur
- Albert Marth
- Albert Pighius
- Albert Pyun
- Albert Sacco
- Albert Scott Crossfield
- Albert Whitford
- Albert William Recht
- Alberto Conti
- Alberto Pappiani
- Alberto Vecchio
- Albertus Antonie Nijland
- Albin (meteorite)
- Albina (mythology)
- Albion (video game)
- Albion Hotel, Balmain
- Albiorix (moon)
- Albireo
- Albor Tholus
- Alborz
- Albrecht Unsöld
- Albrecht-Penck-Medaille
- Albtrauf
- Albubather
- Albulaan
- Alcatel-Lucent
- Alcazar (Paris)
- Alcazar d'Été
- Alcmaeon of Croton
- Alcohol (drug)
- Alcohol and spaceflight
- Alcohol use and sleep
- Alcohol-free zone
- Alcohol-related brain damage
- Alcolapia alcalica
- Alcomsat-1
- Alcor (star)
- Alcott (crater)
- Alcove (landform)
- Alcubierre drive
- Alcuin
- Alcyone (star)
- Alcântara Cyclone Space
- Alcântara Launch Center
- Aldan (river)
- Aldebaran
- Aldebaran (comics)
- Aldebaran (rocket)
- Aldebaran b
- Aldebaran in fiction
- Alden (crater)
- Alder (crater)
- Alder carr
- Alderaan
- Aldnoah.Zero
- Aldo Di Clemente
- Aldric Saucier
- Aldrin (crater)
- Aldynes
- Alec Rose
- Alejandra Melfo
- Alejandra Ávalos
- Alejandro Corichi
- Alejandro Malaspina
- Alejandro Suárez Lozano
- Alek Sandar
- Alekhin (crater)
- Aleksander Jabłoński
- Aleksander Kosiba
- Aleksander Wolszczan
- Aleksandr Aleksandrovich Mikhailov
- Aleksandr Aleksandrovich Volkov
- Aleksandr Chudakov
- Aleksandr Dralkin
- Aleksandr Iosifovich Popov
- Aleksandr Ivanchenkov
- Aleksandr Kaleri
- Aleksandr Laveykin
- Aleksandr Lazutkin
- Aleksandr Nikolayevich Balandin
- Aleksandr Pavlovich Aleksandrov
- Aleksandr Poleshchuk
- Aleksandr Samokutyayev
- Aleksandr Serebrov
- Aleksandr Sergeevič Višnevskij
- Aleksandr Skvortsov (cosmonaut)
- Aleksandr Yakovlevich Orlov
- Aleksandr Zheleznyakov
- Aleksei Gubarev
- Aleksei Isaev
- Aleksei Yeliseyev
- Aleksey Pavlovitch Hansky
- Alencar (crater)
- Alenush Terian
- Aleppo plateau
- Aleriel, or A Voyage to Other Worlds
- Alert, Nunavut
- Alessandro Morbidelli (astronomer)
- Alessandro Piccolomini
- Alessandro Serpieri
- Aleurite
- Alex Chambers
- Alex Ebel
- Alex Filippenko
- Alex Garland
- Alex Jones
- Alex Karbouris
- Alex Kidd in the Enchanted Castle
- Alex M.O.R.P.H.
- Alex McCool
- Alex Proyas
- Alex Schomburg
- Alex Shvartsman
- Alex Szalay
- Alexander (crater)
- Alexander (satellite)
- Alexander A. Clerk
- Alexander A. Gurshtein
- Alexander Adie
- Alexander Agassiz Medal
- Alexander Bolonkin
- Alexander Carmichael Bruce
- Alexander Dalgarno
- Alexander Dallas Bache
- Alexander Dubyago
- Alexander Edgar Douglas
- Alexander Eugen Conrady
- Alexander F. I. Forbes
- Alexander Friedmann
- Alexander George McAdie
- Alexander Gerst
- Alexander J. Dessler
- Alexander Karpinsky
- Alexander Kashlinsky
- Alexander Kazantsev
- Alexander Keith Johnston (1844–1879)
- Alexander Leydenfrost
- Alexander MacFarlane (judge)
- Alexander Macfarlane
- Alexander Nikolaevich Deutsch
- Alexander Ollongren
- Alexander Prokhorov
- Alexander Pushkin (diamond)
- Alexander Salomonovich
- Alexander Selkirk
- Alexander Stewart Herschel
- Alexander Strange
- Alexander Thom
- Alexander Tielens
- Alexander V. Zakharov
- Alexander Vilenkin
- Alexander Vyssotsky
- Alexander Wetmore
- Alexander William Roberts
- Alexander Zaitsev (astronomer)
- Alexander and Nicole Gratovsky
- Alexander von Humboldt Medal (EGU)
- Alexandre Schaumasse
- Alexandru Mironov
- Alexei Fridman
- Alexei Leonov
- Alexei Panshin
- Alexei Starobinsky
- Alexey Stakhov
- Alexey Tryoshnikov
- Alexey Vikhlinin
- Alexicrates
- Alexis A. Gilliland
- Alexis Bouvard
- Alexis Brandeker
- Alexis Caswell
- Alexius Sylvius Polonus
- Alfa (rocket)
- Alfa Planetarium
- Alfisol
- Alfonsine tables
- Alfonso Cuarón
- Alfonso X of Castile
- Alfraganus (crater)
- Alfred Bohrmann
- Alfred Broughton
- Alfred C. Redfield
- Alfred Eisenack
- Alfred Evans (cricketer, born 1858)
- Alfred Gordon Gaydon
- Alfred Harrison Joy
- Alfred J. Eggers
- Alfred J. Lewy
- Alfred Kastler
- Alfred Maddock
- Alfred McEwen
- Alfred Merz
- Alfred Milner, 1st Viscount Milner
- Alfred Robb
- Alfred Russel Wallace centenary
- Alfred Schild
- Alfred Schmitt
- Alfred Wegener Institute for Polar and Marine Research
- Alfred Weld
- Alfred Worden
- Alfred van der Poorten
- Alfredo Fiorito
- Alfvén resonator
- Alfvén wave
- Algae scrubber
- Algatron
- Algerian Space Agency
- Algis Budrys
- Algol
- Algol (film)
- Algol paradox
- Algol variable
- Algoman orogeny
- Algonquin 46m radio telescope
- Algonquin Radio Observatory
- Alhambra Cinema (Israel)
- Alhazen (crater)
- Alhazen's problem
- Ali A.F. Al-Furaih
- Ali Abdelghany
- Ali Baba (crater)
- Ali Moustafa Mosharafa
- Ali Qushji
- Ali ibn Isa al-Asturlabi
- Ali ibn Khalaf
- Ali ibn Ridwan
- Ali ibn Sulayman al-Hashimi
- Aliacensis (crater)
- Alicante 7
- Alicante 8
- Alice (spacecraft instrument)
- Alice Archenhold
- Alice Bowman
- Alice Everett
- Alice Harding
- Alice Johnson (A Nightmare on Elm Street)
- Alice King Chatham
- Alice Larkin
- Alice Liddell
- Alice Prin
- Alice Tully Hall
- Alice in Murderland (film)
- Alice in Wonderland (1951 film)
- Alice in Wonderland dress
- Alice's Adventures in Wonderland
- Alice's Birthday
- Alice's Shop
- Alice, Sweet Alice
- Alicia Austin
- Alicia M. Soderberg
- Alicia Puleo
- Alicyclobacillus acidiphilus
- Alidade
- Alien (1984 video game)
- Alien (Atari 2600)
- Alien (Avalon Hill)
- Alien (Britney Spears song)
- Alien (creature in Alien franchise)
- Alien (film)
- Alien (sculpture)
- Alien 2: On Earth
- Alien 3
- Alien 3 (video game)
- Alien 3: The Gun
- Alien Autopsy (film)
- Alien Carnage
- Alien Encounters (TV series)
- Alien Incident
- Alien Intelligence (Palladium Books)
- Alien Intruder
- Alien Lockdown
- Alien Logic: A Skyrealms of Jorune Adventure
- Alien Mind
- Alien Nation
- Alien Nation (TV series)
- Alien Nation (comics)
- Alien Nation (novel series)
- Alien Oceans
- Alien Pizza Planet
- Alien Planet
- Alien Planet (novel)
- Alien Resurrection
- Alien Resurrection (video game)
- Alien Soldier
- Alien Swarm
- Alien Terminator
- Alien Trespass
- Alien Trilogy
- Alien War
- Alien Worlds (TV series)
- Alien Worlds (radio series)
- Alien Xmas
- Alien abduction
- Alien abduction entities
- Alien autopsy
- Alien from L.A.
- Alien invasion
- Alien language
- Alien language in science fiction
- Alien visitation
- Alien vs Predator (Atari Jaguar game)
- Alien vs Predator (SNES)
- Alien vs. Predator (arcade game)
- Alien vs. Predator (film)
- Alien: Covenant
- Alien: Isolation
- Alien: Out of the Shadows
- Aliens (1990 video game)
- Aliens Adventure Game
- Aliens Infestation
- Aliens Online
- Aliens Predator Customizable Card Game
- Aliens Versus Predator: Extinction
- Aliens in the Attic
- Aliens of London
- Aliens versus Predator (1999 video game)
- Aliens versus Predator 2
- Aliens vs. Predator (2010 video game)
- Aliens vs. Predator: Requiem
- Aliens vs. Predator: Requiem (video game)
- Aliens: A Comic Book Adventure
- Aliens: Colonial Marines
- Aliens: Earth Hive
- Aliens: Nightmare Asylum
- Aliens: Phalanx
- Aliens: Thanatos Encounter
- Aliens: The Computer Game (1986 video game)
- Aliens: The Computer Game (1987 video game)
- Aliens: The Female War
- Alignak
- Alignments of random points
- Aliidiomarina
- Alikhan Bukeikhanov
- Alikhanian–Alikhanov spectrometer
- Alina Kabata-Pendias
- Alinda asteroid
- Alisol
- Alison Murray (scientist)
- Alister Pearson
- Alitus (crater)
- Alizarine Yellow R
- Alkalibacter saccharofermentans
- Alkaline precipitation
- Alkaliphile
- All About Space
- All Bar One
- All Day Long I Dream About Sex
- All Good Things... (Star Trek: The Next Generation)
- All Hallows' Eve (2013 film)
- All Hallows' Eve (2016 film)
- All I Have to Do Is Dream
- All Nighter (bus service)
- All Our Yesterdays (Star Trek: The Original Series)
- All Sky Automated Survey
- All Sky Automated Survey for SuperNovae
- All Summer in a Day
- All Systems Red
- All That's Left Is Love
- All in the Mind (song)
- All in the golden afternoon...
- All the Boys Love Mandy Lane
- All the Way (Buffy the Vampire Slayer)
- All the Weyrs of Pern
- All-Blacks Nunataks
- All-Russian Institute Of Aviation Materials
- All-Star Superman (film)
- AllTrails
- Alla Masevich
- Allabogdanite
- Allah as a lunar deity
- Allahabad Observatory
- Allais effect
- Allan Chapman (historian)
- Allan Hendry
- Allan Hills 77005
- Allan Hills 84001
- Allan Hills A81005
- Allan Hobson
- Allan I. Carswell Astronomical Observatory
- Allan Rechtschaffen
- Allan Sandage
- Allantide
- Allegan (meteorite)
- Allegiance (novel)
- Allegiance (video game)
- Allegro gravitational-wave detector
- Allen Abraham
- Allen F. Donovan
- Allen H. Greenfield
- Allen Hershkowitz
- Allen O. Gamble
- Allen Steele
- Allen Telescope Array
- Allen Theatre
- Allende meteorite
- Allhallowtide
- Alliance for Coastal Technologies
- Alliance for Space Development
- Alliance to Rescue Civilization
- Alliance–Union universe
- Allies (Star Wars novel)
- Allister Whitehead
- Allobarbital
- Allochem
- Allochthon
- Allopatric speciation
- Alluvial river
- Allvar Gullstrand
- Almagest
- Almanach cracoviense ad annum 1474
- Almanach de Liège
- Almanon (crater)
- Almaqah
- Almaz
- Almucantar
- Alnilam
- Alnitak
- Aloha (crater)
- Aloha Wanderwell
- Alois Purgathofer
- Alone Again Or
- Alone in the Universe (book)
- Alonso (crater)
- Alouette 1
- Alouette 2
- Aloysius Cortie
- Aloysius Lilius
- Alp (folklore)
- Alpetragius (crater)
- Alpha & Omega (book)
- Alpha Andromedae
- Alpha Antliae
- Alpha Apodis
- Alpha Aquarii
- Alpha Arae
- Alpha Caeli
- Alpha Camelopardalis
- Alpha Cancri
- Alpha Capricorni
- Alpha Capricornids
- Alpha Cassiopeiae
- Alpha Centauri
- Alpha Centauri (Doctor Who)
- Alpha Centauri Bb
- Alpha Centauri in fiction
- Alpha Centauri or Die!
- Alpha Centaurids
- Alpha Cephei
- Alpha Ceti
- Alpha Chamaeleontis
- Alpha Circini
- Alpha Columbae
- Alpha Comae Berenices
- Alpha Coronae Australis
- Alpha Coronae Borealis
- Alpha Corvi
- Alpha Crateris
- Alpha Cygni variable
- Alpha Delphini
- Alpha Doradus
- Alpha Equulei
- Alpha Fornacis
- Alpha Gruis
- Alpha Herculis
- Alpha Horologii
- Alpha Hydri
- Alpha Indi
- Alpha Lacertae
- Alpha Leporis
- Alpha Librae
- Alpha Lupi
- Alpha Lyncis
- Alpha Magnetic Spectrometer
- Alpha Mensae
- Alpha Microscopii
- Alpha Monocerotids
- Alpha Monocerotis
- Alpha Muscae
- Alpha Octantis
- Alpha Ophiuchi
- Alpha Pavonis
- Alpha Pegasi
- Alpha Persei
- Alpha Persei Cluster
- Alpha Phoenicis
- Alpha Pictoris
- Alpha Piscium
- Alpha Pyxidis
- Alpha Regio
- Alpha Reticuli
- Alpha Sagittae
- Alpha Sagittarii
- Alpha Scorpio
- Alpha Sculptoris
- Alpha Scuti
- Alpha Serpentis
- Alpha Sextantis
- Alpha Telescopii
- Alpha Trianguli
- Alpha Trianguli Australis
- Alpha Tucanae
- Alpha Ursae Majoris
- Alpha Volantis
- Alpha Vulpeculae
- Alpha nuclide
- Alpha particle X-ray spectrometer
- Alpha process
- Alpha-particle spectroscopy
- Alpha1 Capricorni
- Alpha2 Canum Venaticorum variable
- Alpha2 Capricorni
- Alphabus
- Alphard
- Alphenal
- Alpher–Bethe–Gamow paper
- Alphonse Borrelly
- Alphonsus (crater)
- Alpine Astrovillage Lü-Stailas
- Alpine Biogeographic Region
- Alpine Electronics
- Alps
- Alruba
- Als die Götter starben
- Alsat-1B
- Alsat-2A
- Alston Block
- Altai Mountains
- Altair
- Altair (rocket stage)
- Altair (spacecraft)
- Altair in fiction
- Altar (Brazilian band)
- Altar Stone (Stonehenge)
- Altazimuth mount
- Alter (crater)
- Altererythrobacter gangjinensis
- Altererythrobacter ishigakiensis
- Altererythrobacter luteolus
- Altererythrobacter troitsensis
- Alternate Presidents
- Alternatives to general relativity
- Altitude
- Alto Trek
- Altona Observatory
- Aluminium toxicity in people on dialysis
- Aluminium-based nanogalvanic alloys
- Aluminum based nanogalvanic alloys
- Alundra
- Alvan Clark
- Alvan Clark & Sons
- Alvan Graham Clark
- Alvar
- Alvarez hypothesis
- Alver (crater)
- Alvin (crater)
- Alvin Drew
- Alvinella pompejana
- Alwyn Crow
- Alwyn Williams (bishop)
- Alycia J. Weinberger
- Alyoshenka
- Alyssa A. Goodman
- Alén Space
- Alû
- Am star
- Amafufunyana
- Amagat's law
- Amalia Ercoli Finzi
- Amalthea (moon)
- Amanawa Shinmei Shrine
- Amanda Bauer
- Amanda Harkimo
- Amanda Hendrix
- Amanda Lepore
- Amanda Weltman
- Amanoiwato Shrine
- Amaral (crater)
- Amaravella
- Amasa Holcomb
- Amaterasu
- Amateur Astronomers Association of Pittsburgh
- Amateur Telescope Making
- Amateur astronomy
- Amateur radio satellite
- Amateur telescope making
- Amatsumikaboshi
- Amavasya
- Amazon Basin (sedimentary basin)
- Amazon Tall Tower Observatory
- Amazon Women on the Moon
- Amazon biome
- Amazonas 1
- Amazonas 3
- Amazonian pygmy owl
- Amazonis quadrangle
- Amazônia-1
- Amba (landform)
- Ambapur Nagla meteorite
- Ambasada Gavioli
- Ambassador (B&O train)
- Ambassador Theatre (St. Louis)
- Amber Ruffin
- Amber Straughn
- Amberjack Hole
- Ambiguity resolution
- Ambipolar diffusion
- Ambisagrus
- Ambriel
- Ambrogio Fogar
- Ambrose Applejohn's Adventure
- Ambrose Medal
- Ambrosius Aurelianus
- Ame-no-Minakanushi
- Ame-no-Uzume
- Ameghino (crater)
- Amelia Andersdotter
- Amelia Creek crater
- Amelia E. Shevenell
- Amenthes Fossae
- Amenthes quadrangle
- America Sings
- America's Space Prize
- America's Stonehenge
- American Academy of Environmental Engineers and Scientists
- American Academy of Sleep Medicine
- American Association of Sleep Technologists
- American Association of Variable Star Observers
- American Astronautical Society
- American Astronomical Society
- American Astronomical Society 215th meeting
- American Board of Opticianry
- American Board of Sleep Medicine
- American College of Occupational and Environmental Medicine
- American Composer Series
- American Eclipse (book)
- American Ephemeris and Nautical Almanac
- American Federation of Astrologers
- American Geosciences Institute
- American Journal of Science
- American Meteor Society
- American Mineralogist
- American Museum Novitates
- American Museum of Natural History
- American Pyrotechnics Association
- American Quaternary Association
- American Rocket Company
- American Royal Zephyr
- American Satellite Corporation
- American Scary
- American Sleep Apnea Association
- American Society for Photogrammetry and Remote Sensing
- American Society of Agronomy
- Amerika (nightclub)
- Ames Research Center
- Ames Stereo Pipeline
- Ames crater
- Amesbury Archer
- Ametlla de Mar Observatory
- Amguid crater
- Amici (crater)
- Amina Helmi
- Amirani (volcano)
- Amitabha Ghosh (planetary geologist)
- Ammonia
- Ammonia fungi
- Ammonia volatilization from urea
- Ammonifex
- Ammonifex degensii
- Ammonifex thiophilus
- Ammonium perchlorate composite propellant
- Ammonius (crater)
- Ammonius Hermiae
- Amnesia (nightclub)
- Amnion (Gap Cycle)
- Amobarbital
- Amok Time
- Among Us
- Amontons (crater)
- Amor asteroid
- Amore libero - Free Love
- Amorphous carbonia
- Amorphus coralli
- Amorphus orientalis
- Amorphus suaedae
- Amos-17
- Amos-2
- Amos-3
- Amos-4
- Amos-5
- Amos-6
- Amphetamine
- Amphidromic point
- Amphoterite
- Amplitude domain reflectometry
- Amplituhedron
- Ampo (snack)
- Amri Hernández-Pellerano
- Amri Wandel
- Amru Al-Qays (crater)
- Amrutham Chandamamalo
- Amshuman (deity)
- Amsterdam Ordnance Datum
- Amtor
- Amun
- Amundsen (crater)
- Amunet
- Amur (launch vehicle)
- Amurca
- Amy B. Jordan (astronomer)
- Amy Barger
- Amy Barr
- Amy Bower
- Amy Lalonde
- Amy Leventer
- Amy Mainzer
- Amy Simon
- Amy Townsend-Small
- An American Pickle
- An Astronomer
- An Elder Scrolls Legend: Battlespire
- An Exceptionally Simple Theory of Everything
- An Irish Astronomical Tract
- An Old-Time Nightmare (1911 film)
- An Unkindness of Ghosts
- An der Zeitmauer
- Ana (programming language)
- Ana Achúcarro
- Ana Teresa Diego
- Anabranch
- Anacoustic zone
- Anadyrsky District
- Anaerolinea thermolimosa
- Anaerolinea thermophila
- Anala Mons
- Analemma
- Analemmatic sundial
- Analog models of gravity
- Analogue: A Hate Story
- Analytical quality control
- Analytical regularization
- Anammox
- Anania Shirakatsi
- Ananke (moon)
- Ananke group
- Anat Shahar
- Anathem
- Anatolia
- Anatolian Biogeographic Region
- Anatoly Artsebarsky
- Anatoly Berezovoy
- Anatoly Dorodnitsyn
- Anatoly Filipchenko
- Anatoly Levchenko
- Anatoly Solovyev
- Anatoly Vlasov
- Anaxilaus
- Anaximander (crater)
- Anaximenes (crater)
- Ancestral Thames
- Anchialine pool
- Anchor Inn, Birmingham
- Ancient Aliens
- Ancient Echoes Interpretive Centre
- Ancient Egyptian creation myths
- Ancient Egyptian units of measurement
- Ancient Greek astronomy
- Ancient Greek calendars
- Ancient Macedonian calendar
- Ancient Ram Inn
- Ancient astronauts
- Ancient astronauts in popular culture
- Ancillary Justice
- Ancillary Mercy
- Ancillary Sword
- And When the Sky Was Opened
- And yet it moves
- Andal (crater)
- Andalò del Negro
- Andaman hawk-owl
- Andaman scops owl
- Andean Geology
- Andean pygmy owl
- Andean-Saharan glaciation
- Anders (crater)
- Anders Celsius
- Anders Donner
- Anders Johan Lexell
- Anders Jonas Ångström
- Anders Lindstedt
- Anders Planman
- Anders Spole
- Anderson (crater)
- Andersons Cove Formation
- Andersson (crater)
- Andes
- Andesite
- Andesite line
- Andisol
- Andorra
- Andosol
- Andre Melendez
- Andrea Argoli
- Andrea Boattini
- Andrea Di Paola
- Andrea Dupree
- Andrea M. Ghez
- Andrea Milani (mathematician)
- Andreas Albrecht (chemist)
- Andreas Albrecht (cosmologist)
- Andreas Cellarius
- Andreas Eschbach
- Andreas Gerasimos Michalitsianos
- Andreas Nottebohm
- Andreas Stöberl
- Andrei Borisovich Vistelius Research Award
- Andrei Doroshkevich
- Andrei Linde
- Andrei Severny
- Andrei Tarkovsky
- Andrej Čadež
- Andreja Gomboc
- Andrew Abercromby
- Andrew Ainslie Common
- Andrew Ballard
- Andrew Blain
- Andrew Chaikin
- Andrew Claude de la Cherois Crommelin
- Andrew Collier Cameron
- Andrew Digby
- Andrew Fabian
- Andrew Fraknoi
- Andrew G. Haley
- Andrew Graham (astronomer)
- Andrew Hollis
- Andrew I. Porter
- Andrew Ingersoll
- Andrew J. Feustel
- Andrew J. Offutt
- Andrew J. Stofan
- Andrew King (astrophysicist)
- Andrew Lenton
- Andrew Leonard
- Andrew Lyne
- Andrew M. Allen
- Andrew M. Butler
- Andrew M. Davis
- Andrew Marston
- Andrew McKellar
- Andrew Mishkin
- Andrew Niccol
- Andrew R. Liddle
- Andrew Rader
- Andrew Sawyer
- Andrew Siemion
- Andrew Stanton
- Andrew Steele (astrobiologist)
- Andrew Ure
- Andrew Warren (geographer)
- Andrews Cargo Module
- Andrey Fediaev
- Andriamahilala
- Andriyan Nikolayev
- Andro Dunos
- Androcydes (Pythagorean)
- Androgynous Peripheral Attach System
- Andromeda (TV series)
- Andromeda (constellation)
- Andromeda (novel)
- Andromeda Galaxy
- Andromeda I
- Andromeda II
- Andromeda III
- Andromeda IV
- Andromeda IX
- Andromeda Shun
- Andromeda Stories
- Andromeda V
- Andromeda VIII
- Andromeda X
- Andromeda XI
- Andromeda XIX
- Andromeda XVIII
- Andromeda XXI
- Andromeda XXII
- Andromeda in Chinese astronomy
- Andromeda–Milky Way collision
- Andromedids
- Andronov (crater)
- Andrushivka Astronomical Observatory
- Andrzej Trautman
- Andrzej Udalski
- András Vasy
- André Brahic
- André Cailleux
- André Kuipers
- André Lichnerowicz
- André Patry
- Andrés Eloy Martínez
- Andrés de Urdaneta
- Andura meteorite
- Andy Caldwell
- Andy Cato
- Andy Cohen
- Andy Duguid
- Andy Hunter (DJ)
- Andy Thomas
- Andymon
- Andøya Space Center
- Anděl (crater)
- Aneirin (crater)
- Anemic galaxy
- Aneutronic fusion
- Angara-1.2pp
- Angel Hotel, Chippenham
- Angel Links
- Angel Unchained
- Angel and Crown, Covent Garden
- Angel's Luck
- Angela Olinto
- Angela Petrelli
- Angela Speck
- Angelika Brandt
- Angeline Stickney
- Angelique Bouchard Collins
- Angelita Castro-Kelly
- Angell Hall Observatory
- Angelo Marchetti
- Angelo Secchi
- Angelou (crater)
- Angels (nightclub)
- Angels Die Hard
- Angels Hard as They Come
- Angels from Hell
- Angels' Wild Women
- Angers (meteorite)
- Angioletta Coradini
- Angkas
- Angkasawan program
- Angkor Wat
- Angle (astrology)
- Angle-resolved low-coherence interferometry
- Angle-resolved photoemission spectroscopy
- Anglesea Arms, South Kensington
- Anglo-Australian Near-Earth Asteroid Survey
- Anglo-Australian Planet Search
- Anglo-Australian Telescope
- Anglo-French Conference on Time-keeping at Sea
- AngoSat 1
- Angra dos Reis meteorite
- Angrite
- Angry Birds Space
- Angry Birds Star Wars
- Angry Birds Star Wars II
- Angstrom exponent
- Angström (crater)
- Anguissola (crater)
- Angular diameter
- Angular distance
- Angular house
- Angular momentum problem
- Angus McKie
- Angustus Labyrinthus
- Anheung Proving Ground
- Aniak (crater)
- Aniara (film)
- Anil Bhardwaj
- Anil Kumar Das
- Anima Patil-Sabale
- Animals (Muse song)
- Animals in space
- Animated mapping
- Animorphs (TV series)
- Animorphs Chronicles
- Anisothermal plasma
- Anita Buma
- Anita Sengupta
- Anja Cetti Andersen
- Anja Strømme
- Anka Lambreva
- Ankara University Observatory
- Ankaramite
- Ankober (meteorite)
- Ankotarinja
- Anlaug Amanda Djupvik
- Anlong (meteorite)
- Ann Druyan
- Ann E. Wehrle
- Ann Hornschemeier
- Ann Merchant Boesgaard
- Ann W. Richards Congress Avenue Bridge
- Anna Frebel
- Anna Hansell
- Anna Kikina
- Anna L. Nickel telescope
- Anna Lee Fisher
- Anna Milton
- Anna N. Żytkow
- Anna Scaife
- Anna Science Centre, Tiruchirappalli
- Anna Sofaer
- Anna Styszyńska
- Anna Watts
- Anna Wåhlin
- Annaheim meteorite
- Annalee Newitz
- Annales Geophysicae
- Annales de Géographie
- Annals of Carnegie Museum
- Annals of the American Association of Geographers
- Annals of the Former World
- Annapurni Subramaniam
- Anne Archibald
- Anne Barbara Underhill
- Anne Harris (author)
- Anne L. Kinney
- Anne McClain
- Anne Passovoy
- Anne Savage (DJ)
- Anne Thorne
- Anne Tihon
- Anne Walker (astronomer)
- Anne's Spot
- Anne-Marie Lagrange
- Annealed pyrolytic graphite
- Anneila Sargent
- Annette Ferguson
- Anni Hogan
- Annibale Riccò
- Annibale de Gasparis
- Annick Pouquet
- Annick Wilmotte
- Annie Chambers Ketchum
- Annie Easley
- Annie Jump Cannon
- Annie Jump Cannon Award in Astronomy
- Annie Ross
- Annie S. D. Maunder
- Annihilation (film)
- Anniversary (short story)
- Anno 2205
- Annobón scops owl
- Annona (crater)
- Annual Review of Astronomy and Astrophysics
- Annual Review of Earth and Planetary Sciences
- Annual Review of Environment and Resources
- Annual Review of Marine Science
- Annual cycle
- Annualized geo solar
- Anomalous X-ray pulsar
- Anomalous experiences
- Anomalous oxygen
- Anorogenic magmatism
- Another Brick in the Wall
- Another Earth
- Another Life (2019 TV series)
- Another Planet / Voyager
- Another World (video game)
- Anousheh Ansari
- Anoxic event
- Anoxynatronum
- Anoxynatronum sibiricum
- Ansa (Hinduism)
- Ansari X Prize
- Anseris Mons
- Ansgarius (crater)
- Ant-Man and The Wasp: Nano Battle!
- Antagonism (chemistry)
- Antarctic Benthic Deep-Sea Biodiversity Project
- Antarctic Circle
- Antarctic Impulsive Transient Antenna
- Antarctic Muon And Neutrino Detector Array
- Antarctic Science
- Antarctic Specially Managed Area
- Antarctic Submillimeter Telescope and Remote Observatory
- Antarctic Technology Offshore Lagoon Laboratory
- Antarctic continental shelf
- Antarctic ice sheet
- Antarctic microorganism
- Antarctic realm
- Antarctic sea ice
- Antarctica
- Antarctica Schmidt telescopes
- Antares
- Antares A-ONE
- Antariksham 9000 KMPH
- Ante Radonić
- Antecedent drainage stream
- Antecedent moisture
- Anteclise
- Antenna tracking system
- Antennae Galaxies
- Anthe (moon)
- Anthem (video game)
- Anthocyanidin
- Anthocyanin
- Anthology Film Archives
- Anthology of Interest I
- Anthony Acid
- Anthony Aguirre
- Anthony Andre
- Anthony Aveni
- Anthony Besch
- Anthony Boucher
- Anthony Brown (scientist)
- Anthony Heald
- Anthony Llewellyn
- Anthony Moffat
- Anthony Naples
- Anthony Pappa
- Anthony Patrick Fairall
- Anthony W. England
- Anthony Wesley
- Anthony Wynn
- Anthoxanthin
- Anthrepts
- Anthropic Bias (book)
- Anthropic principle
- Anthropic rock
- Anthropization
- Anthropocene Working Group
- Anthropogenic hazard
- Anthroposol
- Anthroposphere
- Anthroposystem
- Anthrosol
- Anthrozoology
- Anti-de Sitter space
- Anti-gravity
- Anti-greenhouse effect
- Anti-satellite weapon
- Anti-sidereal time
- Antic Collective
- Anticenter shell
- Antigo (soil)
- Antihydrogen
- Antikythera mechanism
- Antimatter comet
- Antimatter-catalyzed nuclear pulse propulsion
- Antimycin A
- Antinous (constellation)
- Antipode (journal)
- Antipodes
- Antique Telescope Society
- Antireticular cytotoxic serum
- Antisolar point
- Antitaenite
- Antitail
- Antitropical distribution
- Antlia
- Antlia 2
- Antlia Cluster
- Antlia Dwarf
- Antlia-Sextans Group
- Antoine Poidebard
- Antoine Thomas
- Anton Buslov
- Anton Deusing
- Anton Frederik Bruun
- Anton Gogeisl
- Anton LaVey
- Anton Maria Schyrleus of Rheita
- Anton Melik Geographical Institute
- Anton Staus
- Anton Thraen
- Anton Vamplew
- Anton Zensus
- Antonella Buccianti
- Antoni Opolski
- Antoni Przybylski
- Antonia Ferrín Moreiras
- Antonia Maury
- Antoniadi (Martian crater)
- Antoniadi (lunar crater)
- Antoniadi Dorsum
- Antoniadi scale
- Antonie Pannekoek
- Antonie van Leeuwenhoek
- Antonio Abetti
- Antonio Cagnoli
- Antonio Fresco
- Antonio Lazcano
- Antonio Margheriti
- Antonio Pacinotti
- Antonio Pigafetta
- Antonio Rodotà
- Antonio Santucci
- Antonio Vagnozzi
- Antonio de León y Gama
- Antonio de Ulloa
- Antonov An-225 Mriya
- Antony Cooke
- Antony Hewish
- Antonín Bečvář
- Antonín Mrkos
- Antonín Rükl
- Antricola delacruzi
- Antricola guglielmonei
- Antricola inexpectata
- Antricola marginatus
- Antrix Corporation
- Antu (Mapuche mythology)
- Antígona Segura
- António Cabreira
- António de Mariz Carneiro
- Anuchin (crater)
- Anumati (deity)
- Anumati (lunar phase)
- Anuradha (nakshatra)
- Anushandhitshu Chokro Science Organization
- Anvari
- Anville (crater)
- Anxiety dream
- Anxurus
- Any Colour You Like
- Anybots
- Anyte (crater)
- Anywhere on Earth
- Anzhong Wang
- Aoede (moon)
- Aomawa Shields
- Aoraki / Mount Cook
- Aoraki / Mount Cook National Park
- Aorounga crater
- Aouelloul crater
- Ap (water)
- Ap and Bp stars
- Apache Point Observatory
- Apache Point Observatory Lunar Laser-ranging Operation
- Apache tears
- Apatsahayesvarar Temple, Alangudi
- Apennine Mountains
- Apep
- Apep (star system)
- Aperture
- Aperture Photometry Tool
- Aperture masking interferometry
- Aperture synthesis
- Aphanite
- Aphotic zone
- Aphrodite
- Aphrodite Terra
- Aphroditus
- Apianus (crater)
- Apix, Florida
- Apocalypse (Star Wars novel)
- Apocalypse of Golias
- Apogee of Fear
- Apollinaris Mons
- Apollo
- Apollo (System Copernicus)
- Apollo (crater)
- Apollo (spacecraft)
- Apollo 1
- Apollo 1 Hills
- Apollo 10
- Apollo 11
- Apollo 11 (1996 film)
- Apollo 11 (2019 film)
- Apollo 11 50th Anniversary commemorative coins
- Apollo 11 anniversaries
- Apollo 11 goodwill messages
- Apollo 11 in popular culture
- Apollo 11 lunar sample display
- Apollo 11 missing tapes
- Apollo 12
- Apollo 12 Passive Seismic Experiment
- Apollo 13
- Apollo 13 (film)
- Apollo 13: Mission Control
- Apollo 14
- Apollo 14 Passive Seismic Experiment
- Apollo 15
- Apollo 15 operations on the Lunar surface
- Apollo 15 postal covers incident
- Apollo 16
- Apollo 17
- Apollo 17 lunar sample display
- Apollo 18
- Apollo 18 (film)
- Apollo 18: Mission to the Moon
- Apollo 18: The Moon Missions
- Apollo 20 hoax
- Apollo 21
- Apollo 23
- Apollo 4
- Apollo 5
- Apollo 6
- Apollo 7
- Apollo 8
- Apollo 8 Genesis reading
- Apollo 9
- Apollo Abort Guidance System
- Apollo Applications Program
- Apollo Docking Mechanism
- Apollo Gauntlet
- Apollo Guidance Computer
- Apollo Lunar Module
- Apollo Lunar Surface Experiments Package
- Apollo M. O. Smith
- Apollo Observatory
- Apollo PGNCS
- Apollo TV camera
- Apollo Telescope Mount
- Apollo abort modes
- Apollo asteroid
- Apollo command and service module
- Apollo in Real Time
- Apollo insurance covers
- Apollo program
- Apollo spacecraft feasibility study
- Apollo-Soyuz (cigarette)
- Apollo/Skylab space suit
- Apollodorus (crater)
- Apollonius (crater)
- Apollonius of Tyana
- Apollo–Soyuz
- Appa (character)
- Appalachia (landmass)
- Appalachian Mountains
- Appalachian Plateau
- Apparent horizon
- Apparent longitude
- Apparent magnitude
- Apparent oxygen utilisation
- Apparent place
- Apparent retrograde motion
- Apple Jack
- Apple bobbing
- Apple cider
- Applegate mechanism
- Apples and Oranges (song)
- Appleton (crater)
- Appleton–Hartree equation
- Appley Bridge meteorite
- Application of silicon-germanium thermoelectrics in space exploration
- Applications Technology Satellite
- Applied Geography
- Applied Physics Laboratory
- Applied Spectroscopy (journal)
- Applied and Environmental Microbiology
- Applied spectroscopy
- Apprehensive Films
- Approach and Landing Tests
- Approaching the Unknown
- Appulse
- Aprilis
- AprizeSat
- Aprobarbital
- Apronal
- Apse line
- Apsidal precession
- Apsis
- Apstar 2
- Apstar 2R
- Apstar 6
- Apstar 6C
- Apstar 7
- Apsus Vallis
- Apus
- Apus in Chinese astronomy
- Aqua (satellite)
- Aqua Teen Hunger Force
- AquaSalina
- Aquablue
- Aquacade (satellite)
- Aquamarine (video game)
- Aquanaut
- Aquariids
- Aquarion Evol
- Aquarius (SAC-D instrument)
- Aquarius (astrology)
- Aquarius (constellation)
- Aquarius (rocket)
- Aquarius Dwarf
- Aquarius Reef Base
- Aquarius Stream
- Aquarius in Chinese astronomy
- Aquatic biomonitoring
- Aquatic ecosystem
- Aquatic science
- Aquatic succession
- Aquatic toxicology
- Aquatic toxicology databases
- Aquaveo
- Aqueous geochemistry
- Aquifer
- Aquifer properties
- Aquifer test
- Aquifex
- Aquila (constellation)
- Aquila X-1
- Aquila in Chinese astronomy
- Aquillapollenites
- Aquimarina
- Aquisalimonas asiatica
- Aquisalimonas halophila
- Aquisalimonas lutea
- ArDM
- Ara (constellation)
- Ara in Chinese astronomy
- Arab Astronomical Society
- Arab Satellite Communications Organization
- Arabia quadrangle
- Arabian scops owl
- Arabic and Islamic names of Moon craters
- Arabic parts
- Arabidopsis thaliana
- Arabsat-1A
- Arabsat-1B
- Arabsat-5A
- Arabsat-6A
- Arachnoid (astrogeology)
- Aradia
- Aradia, or the Gospel of the Witches
- Arago (Martian crater)
- Arago (lunar crater)
- Arago spot
- Arago telescope
- Aragon House
- Aragoscope
- Araguainha crater
- Arakawa grids
- Aralkylamine N-acetyltransferase
- Aram Chaos
- Arandas (crater)
- Arase (satellite)
- Aratus (crater)
- Araucaria Project
- Arbol Solo (meteorite)
- Arbuscular mycorrhiza
- Arc blow
- Arc converter
- Arc flash
- Arc lamp
- Arc suppression
- Arc welding
- Arcadia Formation (Australia)
- Arcadia of My Youth
- Arcadia quadrangle
- Arcadio Poveda
- Arcas (crater)
- Arcas (rocket)
- Arcetri Observatory
- Arceus
- Archaea
- Archaeal Richmond Mine acidophilic nanoorganisms
- Archaeal transcription
- Archaeal transcription factor B
- Archaellum
- Archaeoastronomy
- Archaeoastronomy and Stonehenge
- Archaeoastronomy and Vedic chronology
- Archaeocin
- Archaeoglobaceae
- Archaeoglobus profundus
- Archaeonycteris
- Archaerhodopsin
- Archdiocesan Classical Gymnasium (Zagreb)
- Arche (moon)
- Archean
- Archenhold Observatory
- Archeops
- Archer (season 10)
- Arches Cluster
- Arches National Park
- Archibald J. Mason
- Archie (meteorite)
- Archie Roy
- Archimedes (crater)
- Archinaut
- Archives for UFO Research
- Archivist (band)
- Archivos do Museu Nacional
- Archway Tavern
- Archytas
- Archytas (crater)
- Arcing horns
- Arcminute Cosmology Bolometer Array Receiver
- Arcminute Microkelvin Imager
- Arctic
- Arctic (journal)
- Arctic Alaska-Chukotka terrane
- Arctic Biogeographic Region
- Arctic Cape
- Arctic Circle
- Arctic Intermediate Water
- Arctic Lowlands
- Arctic Mars Analog Svalbard Expedition
- Arctic Ocean
- Arctic Planetary Science Institute
- Arctic and Antarctic Research Institute
- Arctic ecology
- Arctic geoengineering
- Arctic ice pack
- Arctic sea ice decline
- Arctic studies
- Arctic, Antarctic, and Alpine Research
- Arctic–alpine
- Arcto-Tertiary Geoflora
- Arcturus
- Arcturus moving group
- Arcus (Titan)
- Arcus (satellite)
- Ardra (nakshatra)
- ArduSat
- Are You Afraid of the Dark?
- Area (journal)
- Area 51: The Dreamland Chronicles
- Area of Special Conservation Interest
- Arecibo Catena
- Arecibo Observatory
- Arecibo Telescope
- Arecibo message
- Areius
- Arendalsfeltet
- Areocentric orbit
- Areostationary orbit
- Areosynchronous orbit
- Ares
- Ares (missile)
- Ares I
- Ares I-X
- Ares V
- Ares Vallis
- Aresas
- Argelander (crater)
- Argentine Institute of Radio Astronomy
- Argentine National Observatory
- Argo (NASA spacecraft)
- Argo (Russian spacecraft)
- Argo (crater)
- Argo (oceanography)
- Argo Navis
- ArgoMoon
- ArgoNeuT
- Argonaut (train)
- Argonaut class reactor
- Argonne National Laboratory
- Argonne Tandem Linear Accelerator System
- Argonne–Northwestern Solar Energy Research Center
- Argos (satellite system)
- Argument of latitude
- Argument of periapsis
- Argunov–Cassegrain telescope
- Argus Coastal Monitoring
- Argus laser
- Argyll Arms
- Argyre Planitia
- Argyre quadrangle
- Ari Ben-Menahem
- Ari Trausti Guðmundsson
- Aria (manga)
- Ariadaeus (crater)
- Ariadne (crater)
- Ariadnes Colles
- Ariane (rocket family)
- Ariane 2
- Ariane Passenger Payload Experiment
- Ariane flight VA240
- Ariane flight VA241
- Ariane flight VA242
- Ariane flight VA243
- Ariane flight VA244
- Ariane flight VA245
- Ariane flight VA246
- Ariane flight VA247
- Ariane flight VA248
- Ariane flight VA253
- Arianespace
- Arica (crater)
- Ariccia
- Arid
- Aridisol
- Aridity index
- Ariel (DJ)
- Ariel (Firefly episode)
- Ariel (anime)
- Ariel (moon)
- Ariel (rocket)
- Ariel 1
- Ariel 2
- Ariel 3
- Ariel 4
- Ariel 5
- Ariel 6
- Ariel Waldman
- Ariel programme
- Aries (astrology)
- Aries (constellation)
- Aries (rocket)
- Aries in Chinese astronomy
- Arietids
- Arif V 216
- Arignote
- Arignotus
- Arinna
- Arirang-1
- Arirang-2
- Aristarchos 2.3 m Telescope
- Aristarchus (crater)
- Aristide Bruant
- Aristides Brezina
- Aristillus (crater)
- Aristoteles (crater)
- Aristotle
- Aristotle's Comet
- Aristoxenus
- Aristoxenus (crater)
- Arixenia esau
- Arizona Geological Survey
- Arizona Limited
- Arizona Science Center
- Arjen Roelofs
- Arjuna asteroid
- Arkady Ostashev
- Arkaim
- Arkanoid vs. Space Invaders
- Arkhangelsky (crater)
- Arlen F. Chase
- Arlene Blum
- Arlene Schnitzer Concert Hall
- Arlene's Grocery
- Arlo U. Landolt
- Arm (geography)
- ArmCosmos
- Arma (deity)
- Armada 2525
- Armadillo Aerospace
- Armageddon (1998 film)
- Armageddon 2419 A.D.
- Armagh Observatory
- Armagh Planetarium
- Armalcolite
- Armand van Helden
- Armavir Radar Station
- Armenia
- Armillary sphere
- Armin Joseph Deutsch
- Armin Otto Leuschner
- Armin van Buuren
- Arming plug
- Armitage III
- Armiński (crater)
- Armor (hydrology)
- Armor (novel)
- Armstrong (crater)
- Armstrong Flight Research Center
- Armstrong Nugget
- Armstrong limit
- Army Ballistic Missile Agency
- Army Map Service
- Army and Navy, Stoke Newington
- Arnab Rai Choudhuri
- Arnaldo Tamayo Méndez
- Arne Henden
- Arno Allan Penzias
- Arno Arthur Wachmann
- Arno of Salzburg
- Arnold (crater)
- Arnold Frutkin
- Arnold Kohlschütter
- Arnold Layne
- Arnold O. Benz
- Arnold Rimmer
- Arnold Wolfendale
- Arnus Vallis
- Aromatum Chaos
- Around the Moon
- AroundMe
- Arp 104
- Arp 107
- Arp 147
- Arp 166
- Arp 187
- Arp 220
- Arp 240
- Arp 256
- Arp 271
- Arp 272
- Arp 273
- Arp 299
- Arp 302
- Arp 7
- Arp 87
- Arp-Madore 1
- Arp-Madore 2
- Arrakis
- Arrakis Planitia
- Array Operations Center
- Array of Low Energy X-ray Imaging Sensors
- Arrhenius (Martian crater)
- Arrhenius (lunar crater)
- Arrival (film)
- Arrow (MILW train)
- Arroyo Aguiar (meteorite)
- Arsenal Design Bureau
- Arsenal Factory
- Arsenate-reducing bacteria
- Arsenic contamination of groundwater
- Arsenio Hall
- Arsia Chasmata
- Arsia Mons
- Art Bell
- Art Corner
- Art Stephenson
- Artaius
- Artamonov (crater)
- Artcraft Theatre
- Artem'ev (crater)
- Artemidorus
- Artemis
- Artemis (crater)
- Artemis (novel)
- Artemis (satellite)
- Artemis 1
- Artemis 2
- Artemis 3
- Artemis Accords
- Artemis Chasma
- Artemis Corona
- Artemis Project
- Artemis program
- Artemis: Spaceship Bridge Simulator
- Artesian aquifer
- Arthrobacter
- Arthrobacter agilis
- Arthrobacter alpinus
- Arthrobacter citreus
- Arthrobacter cryoconiti
- Arthrobacter flavus
- Arthrobacter livingstonensis
- Arthrobacter luteolus
- Arthrobacter psychrochitiniphilus
- Arthrobacter psychrolactophilus
- Arthrobacter roseus
- Arthrobacter russicus
- Arthrobacter subterraneus
- Arthrobacter woluwensis
- Arthur Adel
- Arthur Auwers
- Arthur B. McDonald
- Arthur Beer
- Arthur Berson
- Arthur Bigge, 1st Baron Stamfordham
- Arthur Butler Phillips Mee
- Arthur C. Clarke
- Arthur C. Clarke Institute for Modern Technologies
- Arthur Compton
- Arthur Cowper Ranyard
- Arthur Eddington
- Arthur Francis O'Donel Alexander
- Arthur Geoffrey Walker
- Arthur Hoag
- Arthur Irvin
- Arthur Knight (bishop)
- Arthur L. Day Medal
- Arthur L. Day Prize and Lectureship
- Arthur Leonard Schawlow
- Arthur M. Wolfe
- Arthur Mostyn Field
- Arthur Rambaut
- Arthur Robert Hogg
- Arthur Roberts (cricketer)
- Arthur Rudolph
- Arthur Scott King
- Arthur Storer
- Arthur Thomson (fanzines)
- Arthur Trudeau
- Arthur W. Conway
- Arthur W. Saha
- Arthur Williams McCurdy
- Arthur Williams Wright
- Artie P. Hatzes
- Artificial gravity
- Artificial gravity in fiction
- Artificial satellites in retrograde orbit
- Artificial structures visible from space
- Artificially Expanded Genetic Information System
- Artists and Models
- Arto Oksanen
- Artsimovich (crater)
- Artur Kozłowski (speleologist)
- Artynia Catena
- Artyom Novichonok
- Aruna (Hinduism)
- Arvernus
- Arwen Colles
- Ary Abramovich Sternfeld
- Ary-Mas
- Aryabhata
- Aryabhata (crater)
- Aryabhata (satellite)
- Aryabhata Award
- Aryabhata II
- Aryabhatiya
- Aryabhatta Research Institute of Observational Sciences
- Aryamaan – Brahmaand Ka Yodha
- Aryaman
- Arzachel (crater)
- As above, so below
- Asada (crater)
- Asagumo (rover)
- Asajj Ventress
- Asakaze
- Asaph Hall
- Asaph Hall Jr.
- Asari (crater)
- Ascendant
- Ascension (Star Wars novel)
- Ascension (miniseries)
- Ascent (novel)
- Ascent Abort-2
- Ascent propulsion system
- Asclepi (crater)
- Ascraeus Mons
- Aselsan
- Asemane shab
- Asgard (archaea)
- Asgard (crater)
- Asgardia
- Asger Aaboe
- Asghar Qadir
- Ash Hollow Formation
- Ash pond
- Ash-Shams
- Ashadha
- Ashapatti Tamrakar
- Ashbrook (crater)
- Ashen light
- Asher Space Research Institute
- Ashkharhatsuyts
- Ashlesha (nakshatra)
- Ashley Wallbridge
- Ashraf Choudhary
- Ashtamangala prasnam
- Ashtami
- Ashtar (extraterrestrial being)
- Ashton Observatory
- Ashur (god)
- Ashvin
- Ashvini
- Asia Dinosaur Association
- Asia-Pacific Journal of Atmospheric Sciences
- Asia-Pacific Space Cooperation Organization
- AsiaSat
- AsiaSat 2
- AsiaSat 5
- AsiaSat 6
- AsiaSat 8
- AsiaStar
- Asiago Astrophysical Observatory
- Asiago-DLR Asteroid Survey
- Asian African Association for Plasma Training
- Asian Forum of Parliamentarians on Population and Development
- Asian barred owlet
- Asif Azam Siddiqi
- Asimov (crater)
- Asit Krishna Mukherji
- Askaryan Radio Array
- Askrigg Block
- Asmeret Asefaw Berhe
- Asociación Argentina Amigos de la Astronomía
- Asopus Vallis
- Asp (rocket)
- Aspect (geography)
- Aspects of Venus
- Aspergillus conicus
- Asperity (faults)
- Aspersion
- Asphaltoglaux
- Asphyxiant gas
- Aspledon Undae
- Asraya
- Assamese Calendar
- Assassin (Muse song)
- Assassin of Youth
- Assassination Nation
- Assemblers of Infinity
- Assembly House, Kentish Town
- Assembly of the International Space Station
- Assignment Nor'Dyren
- Assignment: Earth
- Assimilative capacity
- Assimitron
- Assise
- Assisi (meteorite)
- Assisted GPS
- Assiti Shards series
- Association (astronomy)
- Association départementale Isère Drac Romanche
- Association for Women Geoscientists
- Association for the Ecological Defense of Galicia
- Association in Scotland to Research into Astronautics
- Association of Autonomous Astronauts
- Association of British Dispensing Opticians
- Association of Environmental Professionals
- Association of Lunar and Planetary Observers
- Association of Polar Early Career Scientists
- Association of Space Explorers
- Association of Universities for Research in Astronomy
- Associations of environment journalists
- Associazione Friulana di Astronomia e Meteorologia
- Assy McGee
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- Assyrian eclipse
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- Astarte
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- Asteria Regio
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- Asteroid
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- Asteroid Day
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- Asteroid Zoo
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- Asteroids in fiction
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- Astra 1A
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- Astra 1N
- Astra 2A
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- Astra 2C
- Astra 2D
- Astra 2E
- Astra 2F
- Astra 2G
- Astra 3A
- Astra 3B
- Astra 4A
- Astra 5A
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- Astra Lost in Space
- Astraeus
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- Astrid (satellite)
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- Astro Warrior
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- Astrological compatibility
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- Astrology
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- Astrology and the classical elements
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- Astronomical Image Processing System
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- Astronomical League
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- Astronomical Observatory of Capodimonte
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- Astronomical art
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- Astronomical ceiling of Senenmut's Tomb
- Astronomical chronology
- Astronomical clock
- Astronomical clock (Besançon)
- Astronomical complex
- Astronomical constant
- Astronomical day
- Astronomical filter
- Astronomical interferometer
- Astronomical naming conventions
- Astronomical nutation
- Astronomical object
- Astronomical objects and features with Romanian names
- Astronomical optical interferometry
- Astronomical radio source
- Astronomical rings
- Astronomical seeing
- Astronomical spectroscopy
- Astronomical survey
- Astronomical symbols
- Astronomical system of units
- Astronomical unit
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- Astronomische Nachrichten
- Astronomische Vereinigung Kärntens
- Astronomy
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- Astronomy Centre, University of Sussex
- Astronomy Club: The Sketch Show
- Astronomy Day
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- Astronomy and Astrophysics Decadal Survey
- Astronomy and Computing
- Astronomy and religion
- Astronomy and spirituality
- Astronomy education
- Astronomy in Chile
- Astronomy in Serbia
- Astronomy in the medieval Islamic world
- Astronomy on Mars
- Astronomy: Observations and Theories
- Astrooceanography
- Astroparticle Physics (journal)
- Astroparticle physics
- Astropedology
- Astrophilately
- Astrophotography
- Astrophysical Observatory of Javalambre
- Astrophysical Virtual Observatory
- Astrophysical X-ray source
- Astrophysical fluid dynamics
- Astrophysical jet
- Astrophysical maser
- Astrophysical plasma
- Astrophysics
- Astrophysics (journal)
- Astrophysics Data System
- Astrophysics Research Institute
- Astrophysics Source Code Library
- Astrophysics and Space Science
- Astrophysics for People in a Hurry
- Astropulse
- Astropy
- Astrosat
- Astrosat-1000
- Astroscale
- Astroscan
- Astrostatistics
- Astrovirtel
- Astérix (satellite)
- Asymptotic giant branch
- Asymptotic safety in quantum gravity
- Asymptotically flat spacetime
- At the Core
- At-location mapping
- Atacama B-Mode Search
- Atacama Cosmology Telescope
- Atacama Large Millimeter Array
- Atacama Pathfinder Experiment
- Atacama Submillimeter Telescope Experiment
- Atacama skeleton
- Ataegina
- Atagabalin
- Atanua
- Atar
- Atarapa
- Atarsamain
- Atea
- Atelocyanobacterium thalassa
- Aten
- Atenism
- Atget (crater)
- Athabasca Valles
- Athena (spacecraft)
- Athena Coustenis
- Athena Technologies
- Athena-Fidus
- Athene (bird)
- Athens Ohio Halloween Block Party
- Athens insomnia scale
- Athir al-Din al-Abhari
- Atira asteroid
- Atlantic (train)
- Atlantic Biogeographic Region
- Atlantic Bird
- Atlantic Express and Pacific Express
- Atlantic Geology
- Atlantic Ocean
- Atlantic Shield
- Atlantic coastal plain
- Atlantis Chaos
- Atlantis basin
- Atlas (crater)
- Atlas (moon)
- Atlas (rocket family)
- Atlas (star)
- Atlas 3d survey
- Atlas Coelestis
- Atlas G
- Atlas H
- Atlas I
- Atlas Mountains
- Atlas of Peculiar Galaxies
- Atlas-Able
- Atmakaraka
- Atmosphere
- Atmosphere and Telescope Simulator
- Atmosphere of Earth
- Atmosphere of Jupiter
- Atmosphere of Mars
- Atmosphere of Mercury
- Atmosphere of Pluto
- Atmosphere of Titan
- Atmosphere of Triton
- Atmosphere of Uranus
- Atmosphere of Venus
- Atmosphere of the Moon
- Atmosphere-Space Interactions Monitor
- Atmosphere-Space Transition Region Explorer
- Atmospheric Chemistry Suite
- Atmospheric Chemistry and Physics
- Atmospheric Circulation Reconstructions over the Earth
- Atmospheric Dispersion Modelling Liaison Committee
- Atmospheric Environment
- Atmospheric Measurement Techniques
- Atmospheric Model Intercomparison Project
- Atmospheric Neutral Density Experiment
- Atmospheric Radiation Measurement Climate Research Facility
- Atmospheric Reentry Demonstrator
- Atmospheric Reentry Experimental Spaceplane
- Atmospheric Research
- Atmospheric Science Letters
- Atmospheric chemistry
- Atmospheric chemistry observational databases
- Atmospheric correction
- Atmospheric diffraction
- Atmospheric dispersion modeling
- Atmospheric duct
- Atmospheric dynamo
- Atmospheric entry
- Atmospheric escape
- Atmospheric infrared sounder
- Atmospheric lidar
- Atmospheric methane
- Atmospheric mining
- Atmospheric model
- Atmospheric pressure
- Atmospheric pressure discharge
- Atmospheric radiative transfer codes
- Atmospheric reanalysis
- Atmospheric refraction
- Atmospheric science
- Atmospheric sounding
- Atmospheric super-rotation
- Atmospheric theatre
- Atmospheric waveguide
- Atmospheric-pressure plasma
- Atoka meteorite
- Atom Heart Mother (suite)
- Atom Squad
- Atom interferometer
- Atomic Age (comics)
- Atomic Bomberman
- Atomic Clock Ensemble in Space
- Atomic Punk
- Atomic Robo
- Atomic Trades and Labor Council
- Atomic absorption spectroscopy
- Atomic and molecular astrophysics
- Atomic battery
- Atomic emission spectroscopy
- Atomic hydrogen welding
- Atomic spectroscopy
- Atopococcus tabaci
- Atrapadas
- Atsuo Asami
- Atsushi Sugie
- Atsushi Takahashi
- Attack of the Cybermen
- Attack of the Giant Leeches
- Attack of the Killer App
- Attack of the Saucerman
- Attack of the Zolgear
- Attar (god)
- Attenuated total reflectance
- Attenuation coefficient
- Attic calendar
- Attilio Colacevich
- Attilio Palatini
- Attitude and heading reference system
- Attitude control
- Attitude indicator
- Attophysics
- Attraction (film)
- Atum
- Atutahi
- Atwood (crater)
- Au clair de la lune
- AubieSat-1
- Aubrey (producer)
- Aubrey Burl
- Aubrey holes
- Aubrite
- Audi Lunar quattro
- Audouin Dollfus
- Audrey C. Delsanti
- Audrey Napoleon
- Aufeis
- Auger effect
- Auger electron spectroscopy
- Augmented Reality Sandtable
- Augmented Satellite Launch Vehicle
- August Derleth
- August Ferdinand Möbius
- August Hagenbach
- August Herman Pfund
- August Kopff
- August Seydler
- August Underground
- August Underground's Mordum
- August Underground's Penance
- August von Jilek
- Augusta family
- Auguste Charlois
- Augustine Committee
- Augusto Testa
- Auki (crater)
- Aunt Sally
- Auqakuh Vallis
- Aura (satellite)
- Aurelia (crater)
- Aureola
- Auriga (constellation)
- Auriga in Chinese astronomy
- Aurigids
- Aurin
- Auron (character)
- Aurora
- Aurora (mythology)
- Aurora (novel)
- Aurora (train)
- Aurora Borealis Express
- Aurora Max
- Aurora Space Station
- Aurora of November 17, 1882
- Aurora programme
- Aurora: The Secret Within
- Aurorae Chaos
- Aurorae Sinus
- Auroral chorus
- Auroral kilometric radiation
- Auseklis
- Ausonia Mensa
- Ausonia Montes
- Auspace
- Auspicious dreams in Jainism
- Austere Human Missions to Mars
- Austin Creek
- Austin Glen Member
- Austin Powers: The Spy Who Shagged Me
- Austral Launch Vehicle
- Austral pygmy owl
- Australasian Hydrographic Society
- Australasian strewnfield
- Australe Montes
- Australia After Dark
- Australia Mars Analog Research Station
- Australia Telescope Compact Array
- Australia Telescope National Facility
- Australia on the Map
- Australian Aboriginal Astronomy Project
- Australian Aboriginal astronomy
- Australian Dung Beetle Project
- Australian Geographer
- Australian Journal of Earth Sciences
- Australian Shield
- Australian Society of Soil Science Incorporated
- Australian Soil Classification
- Australian Space Agency
- Australian Space Board
- Australian Space Council
- Australian Space Office
- Australian Space Research Institute
- Australian Square Kilometre Array Pathfinder
- Australian and New Zealand Map Society
- Australian flying fox die-offs
- Australian pub
- Australis-OSCAR 5
- Australite
- Austria
- Austrian Journal of Earth Sciences
- Austrian Lightning Detection & Information System
- Austrian Space Agency
- Austrian Space Forum
- Authigenesis
- Auto Train
- Autobiogeography
- Autochem
- Autochthon (geology)
- Autocorrelator
- Autoguider
- Autolycus (crater)
- Automated Data Inquiry for Oil Spills
- Automated Flight Following
- Automated Patrol Telescope
- Automated Planet Finder
- Automated Transfer Vehicle
- Automated mineralogy
- Automated weather map display
- Automatic Dependent Surveillance–Broadcast
- Automatic Ground Collision Avoidance System
- Automatic Independent Surveillance – Privacy
- Automatic behavior
- Automatic direction finder
- Automatic picture transmission
- Automatic target recognition
- Automatic vehicle location
- Automatism (toxicology)
- Automaton Rover for Extreme Environments
- Autometric
- Automotive navigation system
- Automotive oil recycling
- Autonoe (moon)
- Autonomous Landing Hazard Avoidance Technology
- Autonomous Nanosatellite Guardian for Evaluating Local Space
- Autonomous spaceport drone ship
- Autonomous telepresence
- Autopia
- Autopilot
- Autosomal dominant nocturnal frontal lobe epilepsy
- Auwers (crater)
- Auzout (crater)
- Aušrinė
- Av3k
- Available water capacity
- Avak crater
- Avalanche breakdown
- Avanhandava (meteorite)
- Avastha (Hindu astrology)
- Avatar (2009 film)
- Avatar (franchise)
- Avatar (spacecraft)
- Avatar 2
- Avatar 3
- Avatar Flight of Passage
- Avatar: Music from the Motion Picture
- Avatea
- Ave Satani
- Avedon Carol
- Avempace
- Avenged (2013 American film)
- Avenger (1981 video game)
- Avenger (TV series)
- Avengers: Age of Ultron
- Avengers: Endgame
- Avengers: Infinity War
- Avenue 5
- Avernus Colles
- Averroes
- Averted vision
- Avery (crater)
- Avi Loeb
- Avian sleep
- Avicenna
- Avicenna (crater)
- Avidyne Entegra
- Avik Bhattacharya
- Avinash Deshpande
- Avionics
- Avionics Full-Duplex Switched Ethernet
- Avionics software
- Avishai Dekel
- Avizo (software)
- Avogadro (crater)
- Avondale Shipyard
- Avram Davidson
- Avulsion (river)
- Awake (TV series)
- Awards and decorations of the National Oceanic and Atmospheric Administration
- Awards and emblems of the Ministry of Defence of the Russian Federation
- Awarua Tracking Station
- Awasis
- Away (TV series)
- Awilix
- Awonawilona
- Axe (film)
- Axel Firsoff
- Axel Möller
- Axel Nielsen
- Axel Roth
- Axel Timmermann
- Axeman (film)
- Axial precession
- Axial tilt
- Axinite-(Mg)
- Axino
- Axiom Orbital Segment
- Axiom Space
- Axion
- Axion Dark Matter Experiment
- Axis mundi
- Axis of evil (cosmology)
- Ay Ata
- Aya: Imagined Autobiography
- Ayanāṃśa
- Aydar Akhatov
- Ayr Pavilion
- Ayron IV
- Ayvu Rapyta
- Ayyub (crater)
- Azati Prime
- Azazel (Supernatural)
- Azerbaijan
- Azerbaijan National Aerospace Agency
- Azerbaijan Society of Petroleum Geologists
- Azercosmos
- Azersky
- Azerspace-1/Africasat-1a
- Azerspace-2
- Azimuth
- Azo violet
- Azonal
- Azophi (crater)
- Azotti
- Aztec New Year
- Aztec Theatre (San Antonio)
- Aztec calendar
- Azuara impact structure
- Azur (satellite)
- Azure Dragon
- Aśvaghosa (crater)
- Aṣ-Ṣaidanānī
- B 018
- B Aquarii
- B Carinae
- B Centauri
- B Cygni
- B Persei
- B Velorum
- B movies (exploitation boom)
- B&G
- B(e) star
- B-type asteroid
- B-type main-sequence star
- B. Codanayaguy
- B. V. Raman
- B. V. Sreekantan
- B.C. Butcher
- B.Traits
- B2FH paper
- B330
- B612 Foundation
- BA 2100
- BAC Mustard
- BAITSSS
- BARREL
- BASA Film
- BAT99-98
- BATES
- BAe Dynamics
- BB Doradus
- BB Phoenicis
- BBC Sky at Night
- BC Canis Minoris
- BC Cygni
- BD Camelopardalis
- BD Phoenicis
- BD+00 316
- BD+03 2562
- BD+14 4559
- BD+17°3248
- BD+20 2457
- BD+20 594b
- BD+20°307
- BD+40°4210
- BD+43 3654
- BD+48 740
- BD+60°2522
- BD-07 436
- BD-08°2823 b
- BD-08°2823 c
- BD-10°3166 b
- BD-11 4672
- BDF-3299
- BDF-521
- BD−08°2823
- BD−10°3166
- BD−17 63
- BD−17 63 b
- BD−22 5866
- BE Camelopardalis
- BENGAL (project)
- BES III
- BES-5
- BESS (experiment)
- BF Antliae
- BFG (weapon)
- BFI IMAX
- BFI Southbank
- BG Crucis
- BG Geminorum
- BGM-75 AICBM
- BGS Groundhog Desktop
- BGUSAT
- BH Crucis
- BHR 71
- BHUTAN-1
- BI 253
- BI Cygni
- BICEP and Keck Array
- BILSAT-1
- BINGO (telescope)
- BIOMASS
- BIOPAN
- BIOS-3
- BIRD (satellite)
- BK Camelopardalis
- BKL singularity
- BL Boötis
- BL Crucis
- BL Herculis variable
- BL Lacertae
- BL Lacertae object
- BL Telescopii
- BLAST (telescope)
- BLITS
- BLUEsat UNSW
- BM Andromedae
- BMX Bandits (film)
- BN Camelopardalis
- BO Carinae
- BO Microscopii
- BOLAS (spacecraft)
- BOOMERanG experiment
- BOOTES
- BOR-4
- BOR-5
- BOSS Great Wall
- BOSS4GMES
- BP Boötis
- BP Circini
- BP Crucis
- BP Structure
- BPM 37093
- BQ Octantis
- BRAC Onnesha
- BRICSat-2
- BRICSat-P
- BRITE
- BRRISON
- BRUIE
- BSAT-1a
- BSAT-1b
- BSAT-2a
- BSAT-2b
- BSAT-2c
- BSAT-3a
- BSAT-3b
- BSAT-3c
- BSAT-4a
- BSAT-4b
- BSSN formalism
- BSTAR
- BT Monocerotis
- BT MyPlace
- BTA-6
- BTZ black hole
- BU Canis Minoris
- BU Crucis
- BV Centauri
- BW Vulpeculae
- BX Andromedae
- BX Boötis
- BX Circini
- BX442
- BY Draconis
- BY Draconis variable
- BYU Mars Rover
- BZhRK Barguzin
- Ba'het Corona
- BaadAsssss Cinema
- Baade (crater)
- Baade's Window
- Baade-Wesselink method
- Baal
- Baal Hammon
- Babak Amin Tafreshi
- Babakin (Martian crater)
- Babakin (lunar crater)
- Babakin Space Centre
- Babbage (crater)
- Babcock (crater)
- Babcock Model
- Babette's
- Babinet's principle
- Babinet–Soleil compensator
- Baby Boom Galaxy
- Baby Love (1968 film)
- Baby You're a Haunted House
- Babydoll
- Babygrow
- Babylon 5
- Babylon 5: In the Beginning
- Babylon's Ashes
- Babylonian astrology
- Babylonian astronomical diaries
- Babylonian astronomy
- Babylonian calendar
- Babylonian star catalogues
- Babylonokia
- Babysitter Massacre
- Bach (crater)
- Bachelor of Environmental Science
- Bacillus odysseyi
- Bacillus pumilus
- Bacillus safensis
- Bacillus subtilis
- Back (crater)
- Back Track
- Back in the Red
- Back on the Streets (song)
- Back to Reality (Red Dwarf)
- Back to School with Franklin
- Back to Sleep (song)
- Back to the Moon
- Backblast area
- Backdraft 2
- Background (astronomy)
- Background radiation
- Backlash (Star Wars novel)
- Backlund (crater)
- Backlundtoppen
- Backpacker (video game series)
- Backshore
- Backstaff
- Backtesting
- Backwards (Red Dwarf)
- Backyard Worlds
- Baco (crater)
- Bacolor (crater)
- Bacterial circadian rhythm
- Bacteriorhodopsin
- Bacubirito meteorite
- Bad Astronomy
- Bad Boy Bill
- Bad Boy Joe
- Bad Channels
- Bad Girls Go to Hell
- Bad Taste
- Bad Wolf
- Baden-Powell's unilens
- Baden-Württemberg 1
- Badge of Infamy
- Badges of the United States Space Force
- Badi Dooooor Se Aaye Hai
- Badlands
- Badlands Guardian
- Badlands Observatory
- Badnjak (Serbian)
- Badr-1
- Badr-1 (rocket)
- Badr-4
- Badr-B
- Baerbel Lucchitta
- Baer–Babinet law
- Baetic System
- Baetylus
- Bagatelle
- Bagger–Lambert–Gustavsson action
- Bagnall Beach Observatory
- Bagnold Dunes
- Bagnold formula
- Bagnoud Observatory
- Baha' al-din al-'Amili
- Bahcall–Wolf cusp
- Bahloo
- Bahnwärter Thiel
- Bahram Vallis
- Bahtinov mask
- Baháʼí calendar
- Baiheliang
- Baikal (rocket booster)
- Baikal Deep Underwater Neutrino Telescope
- Baikonur Cosmodrome
- Baikonur Cosmodrome Site 109
- Baikonur Cosmodrome Site 110
- Baikonur Cosmodrome Site 200
- Baikonur Cosmodrome Site 250
- Baikonur Cosmodrome Site 31
- Baikonur Cosmodrome Site 41
- Baikonur Cosmodrome Site 45
- Baikonur Cosmodrome Site 81
- Baikonur Cosmodrome Site 90
- Baillaud (crater)
- Bailly (crater)
- Baily (crater)
- Baily's beads
- Baker Observatory
- Bakhchisaray Cave Monastery
- Bakhuysen (crater)
- Baking Bad
- Baksan Neutrino Observatory
- Baktun
- Baku (mythology)
- Bal Bullier
- Bal Tabarin (Paris)
- Bal des Quat'z'Arts
- Bala Fault
- Balagtas (crater)
- Balance (ability)
- Balance of Power (Red Dwarf)
- Balance of system
- Balanchine (crater)
- Balancing lake
- Balandin (crater)
- Balankanche
- Balarishta
- Balbinot 1
- Balboa (lunar crater)
- Balch (crater)
- Baldassarre Capra
- Baldet (Martian crater)
- Baldet (lunar crater)
- Baldwin effect (astronomy)
- Balkhash Radar Station
- Ball (crater)
- Ball Aerospace & Technologies
- Ball State University Observatory
- Ball culture
- Ball lightning
- Ball-pen probe
- Ballistic Missile Defense Organization
- Ballistic capture
- Ballistic missile
- Ballmastrz: 9009
- Ballochroy
- Balloon Experiments with Amateur Radio
- Balloon satellite
- Balloon-borne telescope
- Ballooning instability
- Balls 8
- Balls Cabaret
- Ballute
- Balmer (crater)
- Balmer jump
- Balmer series
- Balnearium lithotrophicum
- Balrog Macula
- Balsamic Moon
- Balsas screech owl
- Baltic Sea anomaly
- Baltis Vallis
- Baltisk
- Baluba mythology
- Balzac (crater)
- Balzan Prize
- Bam (crater)
- Bama (soil)
- Bamahenge
- Bambang Hidayat
- Bamberg (crater)
- Bamboo Club
- Bamboo Gods and Iron Men
- Bamboo cannon
- Banachiewicz (crater)
- Bancroft (crater)
- Bancroft Award
- Band emission
- Band head
- Band-bellied owl
- Bandhana yoga
- Bandits (video game)
- Bandwidth smearing
- Banesh Hoffmann
- Bang Bang Busters
- Bang Face
- Bang snaps
- Bang! Gunship Elite
- Bangabandhu Satellite-1
- Bangabandhu Sheikh Mujibur Rahman Novo Theatre
- Bangalore Astronomical Society
- Bangkok Planetarium
- Bangweulu Block
- Banibrata Mukhopadhyay
- Banig
- Bank (geography)
- Bank Night
- Bank erosion
- Banner of the Stars
- Bantha
- Banting (crater)
- Banwell Caves
- Banxing
- Banū Mūsā
- Baptism by fire
- Baptistina family
- Bapudeva Sastri
- Bar (river morphology)
- Bar Harbor Express
- Bar billiards
- Barabashov (crater)
- Barachois
- Baranauskas (crater)
- Barbara A. Williams
- Barbara Askins
- Barbara Bekins
- Barbara Carroll
- Barbara Cohen (scientist)
- Barbara Crawford Johnson
- Barbara Ercolano
- Barbara J. Thompson
- Barbara Kegerreis Lunde
- Barbara M. Middlehurst
- Barbara Maher
- Barbara Morgan
- Barbara Paulson
- Barbara Sherwood Lollar
- Barbara Tedlock
- Barbara Wienecke
- Barbarella (film)
- Barbarella (rocket)
- Barbexaclone
- Barbie Dreams
- Barbie: Star Light Adventure
- Barbier (crater)
- Barbital
- Barbiturate
- Barbiturate dependence
- Barbiturate overdose
- Barbituric acid
- Barcade
- Barcelona Moon Team
- Barcelona astrolabe
- Barclay Shaw
- Bare Behind Bars
- Bare Knuckles
- Bare-legged owl
- Bareket Observatory
- Barents–Kara Ice Sheet
- Barfield (company)
- Baritosis
- Barium
- Barium star
- Barkla (crater)
- Barlow Memorial Medal
- Barlow Planetarium
- Barlowe's Guide to Extraterrestrials
- Barma (crater)
- Barmbrack
- Barn door tracker
- Barn-owl
- Barna Hedenhös uppfinner julen
- Barnaba Oriani
- Barnacle Bill (Martian rock)
- Barnard (Martian crater)
- Barnard (lunar crater)
- Barnard 147
- Barnard 150
- Barnard 203
- Barnard 30
- Barnard 68
- Barnard Astronomical Society
- Barnard Catalogue
- Barnard Observatory
- Barnard's Loop
- Barnard's Star
- Barnard's Star b
- Barnes–Hut simulation
- Barney (crater)
- Barney Josephson
- Barney and Betty Hill
- Barnstar
- Barnum effect
- Barnumbirr
- Barnyard Blast: Swine of the Night
- Baro (crater)
- Barocius (crater)
- Barometric formula
- Baron Munchausen's Narrative of his Marvellous Travels and Campaigns in Russia
- Barramundi orogeny
- Barranca de Oblatos
- Barred irregular galaxy
- Barred spiral galaxy
- Barreira do Inferno Launch Center
- Barren sign
- Barrier island
- Barrier layer (oceanography)
- Barrier ridge
- Barringer (lunar crater)
- Barringer Medal
- Barrow (crater)
- Barry Barish
- Barry E. Wilmore
- Barry G. Clark
- Barry Goldwater
- Barry Harris (Canadian musician)
- Barry N. Malzberg
- Barry Sonnenfeld
- Barsoom
- Barsoomian language
- Barsukov (crater)
- Bart Bok
- Bart Claessen
- Bart Sibrel
- Bart's Comet
- Bartels (crater)
- Barth (crater)
- Barth Netterfield
- Bartholomaeus Pitiscus
- Bartholomew of Parma
- Bartholomäus Scultetus
- Bartol Research Institute
- Bartolomeo Pollastri
- Barton (crater)
- Barton Beds
- Barton Creek Cave
- Barton Cylinder
- Bartosz Brenes
- Bartók (crater)
- Baruch Samuel Blumberg
- Barycenter
- Barycentric Coordinate Time
- Barycentric Dynamical Time
- Barycentric Julian Date
- Barycentric celestial reference system
- Baryogenesis
- Baryon acoustic oscillations
- Baryon asymmetry
- Baryonic dark matter
- Bas Lansdorp
- Basal sliding
- Basaltic andesite
- Basanite
- Basanta Kumar Sahu
- Base 603
- Base level
- Base-cation saturation ratio
- Base-richness
- Baseball rubbing mud
- Baseflow
- Baseflow residence time
- Baseline (sea)
- Basement Jaxx
- Basement apartment
- Basement high
- Bashiru Ademola Raji
- Bashō (crater)
- Basil Gogos
- Basilia fletcheri
- Basin Groups
- Basin and Range Province
- Basin and range topography
- Bassinet
- Bassorah Fossa
- Bastet
- Bastien Lecouffe-Deharme
- Bastille Day event
- Baszkówka (meteorite)
- Bat
- Bat (heraldry)
- Bat Conservation International
- Bat Conservation Trust
- Bat SARS-like coronavirus WIV1
- Bat World Sanctuary
- Bat and trap
- Bat bomb
- Bat bridge
- Bat bug
- Bat detector
- Bat festival
- Bat fly
- Bat mumps orthorubulavirus
- Bat species identification
- Bat virome
- Bat1K
- Bathochromic shift
- Bathometer
- Bathurst Inlet (rock)
- Bathymetric chart
- Bathymetry
- Batman v Superman: Dawn of Justice
- Batman: Arkham Knight
- Batman: The Dark Knight Returns (film)
- Batsugun
- Batteries Not Included
- Batteries in space
- Battle Angel Alita: Mars Chronicle
- Battle Beyond the Stars
- Battle Beyond the Sun
- Battle Cat
- Battle Clash
- Battle Planet
- Battle at the Binary Stars
- Battle for Andromeda
- Battle for Terra
- Battle in Outer Space
- Battle of Ager Falernus
- Battle of Asakai
- Battle of Cape Esperance
- Battle of Cape Matapan
- Battle of Cephalonia
- Battle of Kapetron
- Battle of Katasyrtai
- Battle of Lubartów (1863)
- Battle of Lubrze
- Battle of Mount Tumbledown
- Battle of Otterburn
- Battle of Pliska
- Battle of Port Arthur
- Battle of Quilacura
- Battle of Ray
- Battle of Savo Island
- Battle of Sept-Îles
- Battle of Sinhagad
- Battle of Skopje
- Battle of Sphacteria
- Battle of Suoi Bong Trang
- Battle of Tippecanoe
- Battle of Torches
- Battle of Vella Lavella (naval)
- Battle of Wauhatchie
- Battle of Xinfeng
- Battle of the Beanfield
- Battle of the Colline Gate (82 BC)
- Battle of the Milvian Bridge
- Battle of the Teutoburg Forest
- Battle of the Worlds
- BattleSphere
- Battlecruiser 3000AD
- Battlefield Airborne Communications Node
- Battlefield Earth (film)
- Battlefield Earth (novel)
- Battlemorph
- Battles Lost and Won
- Battleship (rocketry)
- Battlestar Columbia
- Battlestar Galactica
- Battlestar Galactica (1978 TV series)
- Battlestar Galactica (2003 video game)
- Battlestar Galactica (2004 TV series)
- Battlestar Galactica (fictional spacecraft)
- Battlestar Galactica Online
- Battletoads (Game Boy video game)
- Battletoads (video game)
- Battlezone (1998 video game)
- Bautz–Morgan classification
- Bauxite
- Bavarian State Office for Survey and Geoinformation
- Bay
- Bay Restaurant Group
- Bay de Verde Formation
- Bay mud
- Bay owl
- Bayer (crater)
- Bayer designation
- Bayfordbury
- Bayfordbury Observatory
- Baymouth bar
- Baynes (soil)
- Bayou
- Bays Mountain Park
- Bdelloidea
- Be Forever Yamato
- Be star
- Be/X-ray binary
- Bea Mahaffey
- Beach Abort
- Beach Ball
- Beach Blanket Babylon
- Beach Fever
- Beach advisory
- Beach cusps
- Beach evolution
- Beach nourishment
- Beach ridge
- Beachrock
- Beachy Head West
- Beacon Limestone Formation
- Beacon Theatre (New York City)
- Beagle (crater)
- Beagle 2
- Beagle 3
- Beagle Rupes
- Beaivi
- Beal Aerospace
- Beals (crater)
- Beam origin concept
- Beam park
- Beam-powered propulsion
- Bear Creek (meteorite)
- Bear Valley Strip Mine
- Bear at Home
- Beardmore orogeny
- Beardsley meteorite
- Beast Man
- Beat Girl
- Beat cinema
- Beatrice M. Tinsley Prize
- Beatrice Tinsley
- Beatriz Barbuy
- Beaumont (crater)
- Beauties of the Night
- Beauties of the Night (2016 film)
- Beauty (Once Upon a Time)
- Beauty and the Beast (1934 film)
- Beauty and the Beast (1946 film)
- Beauty and the Beast Live on Stage
- Beauvais astronomical clock
- Beaver Hills (Alberta)
- Beaverhead crater
- Bebhionn (moon)
- Bechet (crater)
- Beckett (crater)
- Becklin–Neugebauer Object
- Becquerel (Martian crater)
- Becquerel (lunar crater)
- Becquerel Prize
- Bed
- Bed base
- Bed frame
- Bed hangings
- Bed jacket
- Bed load
- Bed material load
- Bed rest
- Bed sheet
- Bed size
- Bed skirt
- Bed warmer
- Bed-making
- Beddgelert Fault
- Bedding
- Bedding ceremony
- Beddit
- Bedford Hours
- Bedford Level experiment
- Bediasite
- Bedin I
- Bedlam in Paradise
- Bedout
- Bedrock
- Bedroom
- Bedside sleeper
- Bedtime
- Bedtime story
- Bedwetting alarm
- Bee-Man
- BeeSat-1
- Beef House
- Beehive Cluster
- Beelzebub
- Beer (Martian crater)
- Beer (lunar crater)
- Beer Quarry Caves
- Beerenberg
- Beersel Hills Observatory
- Beer–Lambert law
- Beestonian stage
- Beethoven (crater)
- Beethoven Burst (GRB 991216)
- Before Eden
- Before I Wake (2016 film)
- Before Mars (novel)
- Before Present
- Before and After (Star Trek: Voyager)
- Beggars Night
- Begin (video game)
- Begoña Vila
- Behaim (crater)
- Behavioral geography
- Behavioral modeling in hydrology
- Behavioral sleep medicine
- Behenian fixed star
- Behind the Curve
- Behind the Nudist Curtain
- Behlen Observatory
- Behram (crater)
- BeiDou
- BeiDou-3 M1
- Beige Planet Mars
- Beijerinck (crater)
- Beijing Aerospace Flight Control Center
- Beijing Ancient Observatory
- Beijing Anomaly
- Beijing Astronomical Observatory
- Beijing Planetarium
- Beijing Schmidt CCD Asteroid Program
- Bejan Daruwalla
- Bek (crater)
- Beketov (crater)
- Bel decomposition
- Bel'kovich (crater)
- BelKA
- Bela Lugosi's Dead
- Belarus
- Belarus Space Agency
- Belatucadros
- Belchen System
- Belenus
- Belgian marble
- Belgrade Observatory
- Belgrade Planetarium
- Believe... In Holiday Magic
- Believe... There's Magic in the Stars
- Belinda (moon)
- Belinda Wilkes
- Belinskij (crater)
- Belinski–Zakharov transform
- Belintersat-1
- Bell (crater)
- Bell (satellite)
- Bell Eagle Eye
- Bell Inn, Enfield
- Bell Island Group
- Bell Museum of Natural History
- Bell X-14
- Bella A. Burnasheva
- Bellas de noche
- Bellatrix
- Bellatrix Aerospace
- Belle Vue Quarry
- Bellini (crater)
- Bellinsgauzen (crater)
- Bello (crater)
- Bellot (crater)
- Bellsbank meteorite
- Belmont Cave
- Belogradchik Observatory
- Belopol'skiy (crater)
- Belt of Venus
- Belterra, Pará
- Belus (Babylonian)
- Belushi's
- Belyaev (crater)
- Belz (crater)
- Bem (Star Trek: The Animated Series)
- Ben 10 Alien Force: Vilgax Attacks
- Ben Bova
- Ben Bussey
- Ben Carlin
- Ben Cooper, Inc.
- Ben Franklin (PX-15)
- Ben Gascoigne
- Ben Goertzel
- Ben Liebrand
- Ben Mayer
- Ben Moore (astrophysicist)
- Ben Shaw (DJ)
- Ben Watt
- Bench (crater)
- Bench (geology)
- Bench Crater meteorite
- Benchtop nuclear magnetic resonance spectrometer
- Bendegó meteorite
- Benedetta Ciardi
- Benedict (crater)
- Benedict Jablonski
- Benedict Sestini
- Benedict Zuckermann
- Benedum Center
- Benefic planet
- Benefield Anechoic Facility
- Benefits of space exploration
- Benesi–Hildebrand method
- Bengal Fan
- Bengt Berg (ornithologist)
- Bengt Edlén
- Bengt Gustafsson (astronomer)
- Bengt Strömgren
- Bengt Westerlund
- Benjamin Apthorp Gould
- Benjamin Boss
- Benjamin Franklin Keith
- Benjamin Jekhowsky
- Benjamin Markarian
- Benjamin Peirce
- Benjamin Scott
- Benjamin Spilsbury
- Benjamin West (astronomer)
- Benjamin Zuckerman
- Benmore Peak
- Benmoreite
- Bennett Hill (lunar mountain)
- Benny Benassi
- Benny Ninja
- Benny's Bar bombing
- Benoit (crater)
- Benson Island, British Columbia
- Bentazepam
- Benthic boundary layer
- Bentley's paradox
- Benton Fault
- Benton fireworks disaster
- Benton meteorite
- Benzobarbital
- Benzodiazepine
- Benzylbutylbarbiturate
- BepiColombo
- BeppoSAX
- Berdella
- Beresheet
- Beresheet 2
- Berezin integral
- Bergamo Cathedral
- Bergelmir (moon)
- Bergen School of Meteorology
- Berghain
- Bergisch Gladbach Observatory
- Bergman (crater)
- Bergschrund
- Bergstrand (crater)
- Berkel (crater)
- Berkeley Arms, Purton
- Berkeley SETI Research Center
- Berkeley School of Latin Americanist Geography
- Berkeley-Illinois-Maryland Association
- Berkner (crater)
- Berkshire (soil)
- Berkut spacesuit
- Berlage (crater)
- Berlandiera lyrata
- Berlin Institute for Population and Development
- Berlin Observatory
- Berlin scientific balloon flights
- Berliner (train)
- Berliner Astronomisches Jahrbuch
- Berlioz (crater)
- Bermuda Atlantic Time-series Study
- Bermuda saw-whet owl
- Bernal sphere
- Bernard (crater)
- Bernard A. Harris Jr.
- Bernard Carr
- Bernard F. Burke
- Bernard F. Schutz
- Bernard Foing
- Bernard Haisch
- Bernard John Smith
- Bernard Lovell
- Bernard Lyot Telescope
- Bernard Mills
- Bernard Pagel
- Bernard Palissy
- Bernard R. Goldstein
- Bernard Werber
- Bernhard Dawson
- Bernhard Eitel
- Bernhard Schmidt
- Bernhard Walther
- Bernhard von Lindenau
- Bernhard von Wüllerstorf-Urbair
- Bernie Fanaroff
- Bernie Katz
- Bernini (crater)
- Bernoulli (crater)
- Bernstein–Greene–Kruskal modes
- Berossus
- Berosus (crater)
- Berruornis
- Berry (crater)
- Berserker (novel series)
- Berserker Raids
- Bert I. Gordon
- Bert van Sprang
- Berth (sleeping)
- Bertha Rogers
- Berthold Ribbentrop
- Bertil Lindblad
- Bertram Brockhouse
- Bertrand Meigh Peek
- Bertrand's theorem
- Berw Fault
- Beryl H. Potter
- Beryllium-8
- Berzelius (crater)
- Besançon Astronomical Observatory
- Bessarion (crater)
- Bessel (crater)
- Besselian elements
- Besser Museum for Northeast Michigan
- Best Friends (1975 film)
- Best Little Horror House in Langley Falls
- Best available technology
- Best management practice for water pollution
- Bestial sign
- Bestla (moon)
- Beta (plasma physics)
- Beta Andromedae
- Beta Apodis
- Beta Aquarii
- Beta Aquilae
- Beta Arae
- Beta Arietis
- Beta Aurigae
- Beta Boötis
- Beta Caeli
- Beta Camelopardalis
- Beta Cancri
- Beta Canis Majoris
- Beta Canis Minoris
- Beta Canum Venaticorum
- Beta Capricorni
- Beta Carinae
- Beta Cassiopeiae
- Beta Centauri
- Beta Cephei
- Beta Ceti
- Beta Chamaeleontis
- Beta Circini
- Beta Columbae
- Beta Comae Berenices
- Beta Coronae Australis
- Beta Coronae Borealis
- Beta Corvi
- Beta Crateris
- Beta Delphini
- Beta Doradus
- Beta Draconis
- Beta Equulei
- Beta Eridani
- Beta Fornacis
- Beta Gruis
- Beta Herculis
- Beta Horologii
- Beta Hydrae
- Beta Hydri
- Beta Indi
- Beta Lacertae
- Beta Leonis Minoris
- Beta Leporis
- Beta Librae
- Beta Lupi
- Beta Lyrae
- Beta Lyrae variable
- Beta Mensae
- Beta Microscopii
- Beta Monocerotis
- Beta Muscae
- Beta Octantis
- Beta Ophiuchi
- Beta Pavonis
- Beta Pegasi
- Beta Phoenicis
- Beta Pictoris
- Beta Pictoris b
- Beta Pictoris c
- Beta Pictoris moving group
- Beta Piscis Austrini
- Beta Piscium
- Beta Pyxidis
- Beta Regio
- Beta Reticuli
- Beta Sagittae
- Beta Sagittarii
- Beta Scorpii
- Beta Sculptoris
- Beta Scuti
- Beta Serpentis
- Beta Sextantis
- Beta Tauri
- Beta Taurids
- Beta Trianguli
- Beta Trianguli Australis
- Beta Tucanae
- Beta Ursae Majoris
- Beta Ursae Minoris
- Beta Virginis
- Beta Volantis
- Beta angle
- Beta cloth
- Beta plane
- Beta1 Sagittarii
- Beta2 Sagittarii
- Betelgeuse
- Betelgeuse in fiction
- Betelguese, a Trip Through Hell
- Beth A. Brown
- Beth Meacham
- Beth Moses
- Bethany Ehlmann
- Betic corridor
- Betsy Wollheim
- Better Angels (Supergirl)
- Better Than Life (Red Dwarf episode)
- Bettina Meyer
- Bettine van Vuuren
- Bettinus (crater)
- Betty Ballantine
- Betty Boop's Hallowe'en Party
- Betty Grissom
- Betty Louise Turtle
- Between Planets
- Between the Strokes of Night
- Betz mystery sphere
- Betül Kaçar
- Beutenbergiaceae
- Bevameter
- Bevan Sharpless
- Beverly Shaw
- Beverly-Begg Observatory
- Beware the Batman
- Bexta
- Beyenchime-Salaatin crater
- Beyond Apollo
- Beyond Einstein program
- Beyond Good & Evil (video game)
- Beyond Good and Evil 2
- Beyond Lies the Wub
- Beyond Skyline
- Beyond a Joke (Red Dwarf)
- Beyond the Blue Event Horizon
- Beyond the Farthest Star (Star Trek: The Animated Series)
- Beyond the Law (1993 film)
- Beyond the Red
- Beyond the Red Line
- Bečvář (crater)
- Bhabha (crater)
- Bhadra (Hindu calendar)
- Bhaga
- Bhairava
- Bhakti yoga
- Bharani
- Bharat Ratra
- Bhavartha Ratnakara
- Bhob Stewart
- Bhrigu
- Bhrigu Samhita
- Bhutan
- Bhuvan
- Bhāskara I
- Bhāskara II
- Bhāva
- Bi Sheng (crater)
- Bi-elliptic transfer
- Bi-scalar tensor vector gravity
- Biak scops owl
- Bian River (China)
- Bianca (moon)
- Bianca Del Rio
- Bianca Jagger
- Bianchi classification
- Bianchini (Martian crater)
- Bianchini (lunar crater)
- Bias frame
- Biały Słoń
- Białystok (meteorite)
- Bibcode
- Bibliography and Index of Geology
- Bibliography of Aeolian Research
- Bibliography of Halloween
- Bibliography of encyclopedias: astronomy and astronomers
- Biblis Tholus
- Bicarbonate indicator
- Biconic cusp
- Bicyclobutane
- Bidental
- Biding My Time
- Bidirectional reflectance distribution function
- Bidirectional scattering distribution function
- Biefeld–Brown effect
- Biela (crater)
- Biela's Comet
- Biermann battery
- Bifilar sundial
- Bifurcation lake
- Big Bang
- Big Bang (book)
- Big Bang Observer
- Big Bang nucleosynthesis
- Big Bear Solar Observatory
- Big Bertha (lunar sample)
- Big Bounce
- Big Brake
- Big Chuck and Lil' John
- Big Crunch
- Big Dipper
- Big Gemini
- Big Head Formation
- Big Hero 6 (film)
- Big Hole
- Big Joe 1
- Big Lurch (cosmology)
- Big Money Hustlas
- Big Muley
- Big Picture Science
- Big Planet
- Big Pumpkin
- Big Red Racing
- Big Rip
- Big Wolf on Campus
- Big dumb booster
- Big-Bang Cannon
- Bigach crater
- Bigelow Aerospace
- Bigelow Commercial Space Station
- Bigelow Expandable Activity Module
- Bigelow Laboratory for Ocean Sciences
- Bighorn Basin Dinosaur Project
- Bight (geography)
- Bigsby Medal
- Bijou Theater (Chicago)
- Bike (song)
- Biker Mice from Mars
- Biker Mice from Mars (2006 TV series)
- Bikini Beach
- Bila (sun)
- Bilbo Colles
- Bilharz (crater)
- Bilibili Video Satellite
- Bilitis (film)
- Bill & Ted's Bogus Journey
- Bill Anders
- Bill Ashton (jazz musician)
- Bill Burns (Australian politician)
- Bill Camfield
- Bill Cardille
- Bill Chalker
- Bill Hibbard
- Bill Hopkins (composer)
- Bill Kaysing
- Bill King (Royal Navy officer)
- Bill Maher
- Bill McCay
- Bill Moore (ufologist)
- Bill Mumy
- Bill Nelson
- Bill Nye
- Bill Pickering (rocket scientist)
- Bill Price (physicist)
- Bill Quirk
- Bill Roper (filker)
- Bill Tarmey
- Bill Tindall
- Bill Todd
- Bill Warren (film historian and critic)
- Billain
- Billion years
- Billionaire space race
- Billy (crater)
- Billy Blastoff
- Billy Bounce
- Billy Cranston
- Billy Jack
- Billy Meier
- Billy Stritch
- Bimal Mukherjee
- Bimetric gravity
- Bimodal volcanism
- Binah (Kabbalah)
- Binary asteroid
- Binary black hole
- Binary cycle
- Binary mass function
- Binary pulsar
- Binary star
- Binary stars in fiction
- Binary system
- Bindstone
- Bing Maps Platform
- Bingham (crater)
- Binil Aryal
- Binocular disparity
- Binoculars
- Bio of a Space Tyrant
- Bio-ship Paladin
- BioForge
- BioHome
- BioSentinel
- Bioanalysis
- Bioanalytical equivalent
- Bioassay
- Bioastronautics
- Bioavailability (soil)
- Biobío-Aluminé Fault Zone
- Biochar
- Biochemical oxygen demand
- Bioclimatology
- Bioclogging
- Biocoenosis
- Bioconcentration
- Bioconversion
- Biodiversity
- Biodiversity loss
- Bioeffector
- Biofilm
- Biofilter
- Biogenic substance
- Biogeochemical cycle
- Biogeochemistry
- Biogeographia
- Biogeographic classification of India
- Biogeographic realm
- Biogeographic regions of Europe
- Biogeography
- Biogeography of Deep-Water Chemosynthetic Ecosystems
- Biogeography of gastropods
- Biogeography of paravian dinosaurs
- Biogeology
- Biogeosciences
- Bioindicator
- Bioinstrumentation
- Biolab
- Biological Oxidant and Life Detection
- Biological effects of high-energy visible light
- Biological integrity
- Biological monitoring working party
- Biological rules
- Biological small-angle scattering
- Biological soil crust
- Biomarkers of exposure assessment
- Biomedical spectroscopy
- Biomes in Brazil
- Biometeorology
- Biomics
- Biomineralization
- Biomonitoring
- Bion (satellite)
- Bion No.11
- Bion-M No.1
- Bionic Leaf
- Bionix
- Biophysical environment
- Bioregion
- Bioremediation
- Bioremediation of PCBs
- Bioreporter
- Bioretention
- Biorhexistasy
- Biorhythm (pseudoscience)
- Biosaline agriculture
- Biosand filter
- Biosatellite
- Biosatellite 1
- Biosatellite 2
- Biosatellite 3
- Biosatellite program
- Bioship
- Biosignature
- Biosolarization
- Biospeleology
- Biosphere
- Biosphere 2
- Biosphere model
- Biostimulation
- Biosurvey
- Bioswale
- Biot (crater)
- Biotic Ligand Model
- Biotic ethics
- Biotic index
- Biotic interchange
- Biotic pump
- Biotone
- Biotope
- Bioturbation
- Biphasic and polyphasic sleep
- Bipolar nebula
- Bipolar outflow
- Biranchinarayan Temple, Buguda
- Biranchinarayan Temple, Palia
- Birbal Sahni Institute of Palaeosciences
- Bird's-eye view
- Birds-1
- Birds-2
- Birefringence
- Birge–Sponer method
- Birkat Hachama
- Birkeland (lunar crater)
- Birkeland current
- Birkhoff (crater)
- Birla Planetarium, Chennai
- Birla Planetarium, Kolkata
- Birla Science Museum
- Birmingham (crater)
- Birmingham Astronomical Society
- Birmingham Solar Oscillations Network
- Birmingham Special
- Birrificio Lambrate
- Birt (crater)
- Birth of Fire
- Bis(trifluoromethyl)peroxide
- Biscayne Aquifer
- Bisei Spaceguard Center
- Bishop Museum of Science and Nature
- Bishop Ring (habitat)
- Bishun Khare
- Bismark (TV series)
- Bissextus
- Bitch Slap
- BiteStrip
- Bitter Sweet Symphony
- Biuletyn Peryglacjalny
- Bjarni Tryggvason
- Bjerknes (lunar crater)
- Bjerknes Centre for Climate Research
- Bjerrum plot
- Bjo Trimble
- Bjornson (crater)
- BlaBlaCar
- BlacKkKlansman
- Black (crater)
- Black Antenna
- Black Arrow
- Black Belt Jones
- Black Brant (rocket)
- Black Caesar (film)
- Black Cobra (film series)
- Black Cobra Woman
- Black Devil Doll From Hell
- Black Dynamite
- Black Dynamite (TV series)
- Black Emanuelle
- Black Emanuelle 2
- Black Eye Galaxy
- Black Girl (1972 film)
- Black Gunn
- Black Hawk (CB&Q train)
- Black Heat (film)
- Black Hills meridian
- Black Hole Initiative
- Black Holes and Baby Universes and Other Essays
- Black Horse (rocket)
- Black Horse, Preston
- Black Horse, South Mimms
- Black Horse, Stepney
- Black Jesus (TV series)
- Black Joy (1977 film)
- Black Knight (rocket)
- Black Knight satellite conspiracy theory
- Black Leather Jackets
- Black Lion, Hammersmith
- Black Lion, Kilburn
- Black Lolita
- Black Mama White Mama
- Black Man
- Black Moshannon Observatory
- Black Prince, Bexley
- Black Prophecy
- Black River (Duwamish River tributary)
- Black Samson
- Black Samurai
- Black Sea Biogeographic Region
- Black Shampoo
- Black Shoals
- Black Sister's Revenge
- Black Sky Aerospace
- Black Sky: The Race for Space
- Black Snake (film)
- Black Star of Africa
- Black Starlet
- Black Stone
- Black Sun (symbol)
- Black Tortoise
- Black Widow Pulsar
- Black Zero
- Black body
- Black brane
- Black carbon
- Black drop effect
- Black dwarf
- Black hole
- Black hole bomb
- Black hole complementarity
- Black hole cosmology
- Black hole electron
- Black hole information paradox
- Black hole starship
- Black hole thermodynamics
- Black holes in fiction
- Black moon
- Black powder rocket motor
- Black sand
- Black snake (firework)
- Black star (semiclassical gravity)
- Black triangle (UFO)
- Black-body radiation
- Black-capped screech owl
- Black-eyed children
- BlackGEM
- Blackenstein
- Blackett (crater)
- Blackett effect
- Blackhead Formation
- Blackhole (video game)
- Blackie & Kanuto
- Blackjack (1978 film)
- Blacklight poster
- Blackout (horror experience)
- Blackrock Castle
- Blacksky Pathfinder-1
- Blacksmiths Arms, Broughton Mills
- Blackstar (TV series)
- Blackstar (spacecraft)
- Blackthorn Asylum
- Blackthorne
- Blackwater (coal)
- Blackwater (waste)
- Blacula
- Blade Runner 3: Replicant Night
- Blade Runner: Black Lotus
- Blagg (crater)
- Blagovest (satellite)
- Blahbalicious
- Blairmorite
- Blaisdon Hall
- Blake's 7
- Blakesley Burkhart
- Blakiston's Line
- Blancanus (crater)
- Blanchard (crater)
- Blanchinus (crater)
- Blanco 1
- Blandford (soil)
- Blandford–Znajek process
- Blanet
- Blank & Jones
- Blanket
- Blanket fort
- Blanket sleeper
- Blanketing effect
- Blaník
- Blast Off at Woomera
- Blast Radius
- Blast shelter
- Blast wave
- BlastOff! Corporation
- Blaster Master
- Blaster Master Jr.
- Blaster's Universe
- Blaxploitation
- Blaxploitation horror films
- Blazar
- Blaze Starr Goes Nudist
- Blazed grating
- Blazhko (crater)
- Blazhko effect
- Bleb (mineralogy)
- Bled (crater)
- Bleecker Street Cinema
- Bleien Radio Observatory
- Bless This Acid House
- Bleu Nuit
- Blick Mead
- Blind Beast vs. Dwarf
- Blind Rage (film)
- Blind flying panel
- Blindfold
- Blindsight (Watts novel)
- Blink comparator
- Blink of an Eye (Star Trek: Voyager)
- Bliss (Muse song)
- Bliss (crater)
- Blithfield meteorite
- Blitz Club
- Blitzar
- Blizna
- Block Island meteorite
- Blockfield
- Blok 2BL
- Blood Cult
- Blood Drive (TV series)
- Blood Feast
- Blood Freak
- Blood Gulch
- Blood Junkie
- Blood Mania
- Blood Monkey
- Blood Red Sandman
- Blood Sucking Freaks
- Blood moon prophecy
- Bloodbath of B-R5RB
- Bloodborne
- Bloodsuckers (2005 film)
- Bloodsuckers from Outer Space
- Bloodthirsty Butchers (film)
- Bloody Creek crater
- Bloody Murder
- Bloody Murder 2: Closing Camp
- Bloom (novel)
- Bloop
- Blow Up (club night)
- BlowOut
- Blowhole (geology)
- Blowout (geomorphology)
- BluShift Aerospace
- Blue (Red Dwarf)
- Blue (The Verve song)
- Blue 88
- Blue Abyss
- Blue Anchor, Hammersmith
- Blue Ball Inn
- Blue Comet SPT Layzner
- Blue Dream
- Blue Gemini
- Blue Hill Meteorological Observatory
- Blue Lantern Corps
- Blue Mars (video game)
- Blue Mesa Observatory
- Blue Moon (spacecraft)
- Blue Night Network
- Blue Origin
- Blue Origin Goddard
- Blue Origin facilities
- Blue Origin landing platform ship
- Blue Oyster (Saint-Petersburg, Russia)
- Blue Planet (role-playing game)
- Blue Remembered Earth
- Blue Ridge Limited
- Blue Ridge Mountains
- Blue Sky with a White Sun
- Blue Tiger (film)
- Blue Train (Japan)
- Blue Wall Cafe
- Blue dwarf (red-dwarf stage)
- Blue giant
- Blue hole
- Blue hour
- Blue ice (glacial)
- Blue large-amplitude pulsator
- Blue loop
- Blue moon
- Blue sky catastrophe
- Blue space
- Blue straggler
- Blue supergiant star
- Blue-ice area
- Blueschist
- Blueshift
- Bluestone
- Bluestonehenge
- Blytt–Sernander system
- BlöödHag
- Bo Jiang (NASA researcher)
- Boar's Head Inn, Bishop's Stortford
- Board of Registered Polysomnographic Technologists
- Bob "Hoolihan" Wells
- Bob Behnken
- Bob Berman
- Bob Corritore
- Bob Costas
- Bob Dempsey
- Bob Eggleton
- Bob Gale
- Bob Larkin
- Bob Lazar
- Bob Mould
- Bob P. King
- Bob Parkinson (aerospace engineer)
- Bob Sinclar
- Bob Stane
- Bob Stanley (musician)
- Bob Twiggs
- Bob Wilkins
- Boba Fett
- Bobak Ferdowsi
- Bobbejaan Schoepen
- Bobbie Vaile
- Bobby Short
- Bobillier (crater)
- Bobina
- Bobone (crater)
- Bocage
- Boccaccio (crater)
- Bochum Observatory
- Bodacious Space Pirates
- Bodamalai Betta
- Bode (crater)
- Body Bags (film)
- Body Snatchers (1993 film)
- Body and Soul (1925 film)
- Body of water
- Bodysnatcher (Red Dwarf)
- Bodyswap (Red Dwarf)
- Boeddicker (crater)
- Boeing
- Boeing 601
- Boeing 702
- Boeing Crewed Flight Test
- Boeing Lunar Lander
- Boeing OC-135B Open Skies
- Boeing Orbital Flight Test
- Boeing Orbital Flight Test 2
- Boeing Pad Abort Test
- Boeing Satellite Development Center
- Boeing Starliner
- Boeing Starliner Calypso
- Boeing Starliner-1
- Boeing X-20 Dyna-Soar
- Boeing X-37
- Boeing X-40
- Boethius (Mercurian crater)
- Boethius (lunar crater)
- Bog
- Boggomoss
- Bogomolny equations
- Bogoriellaceae
- Boguslawsky (crater)
- Bohdan Paczyński
- Bohemian crater
- Bohm diffusion
- Bohnenberger (crater)
- Boho Caves
- Bohr (crater)
- Boilerplate (spaceflight)
- Boiling
- Boiling point
- Boise meridian
- Bojite
- Bok (Martian crater)
- Bok (lunar crater)
- Bok Prize
- Bok Telescope
- Bok globule
- Bokashi (horticulture)
- Bold Orion
- Bold They Rise
- Boletín de Geología
- Boleyn Tavern
- Bolide
- Bolivarian Agency for Space Activities
- Bolivia
- Bolivian Space Agency
- Bolkar Mountains
- Boller and Chivens
- Bolocam Galactic Plane Survey
- Bolometer
- Bolometric correction
- Bolsena Lacus
- Bolshoi Cosmological Simulation
- Bolson
- Bolster
- Bolster heath
- Boltzmann (crater)
- Boltzmann brain
- Boltzmann relation
- Bolus of Mendes
- Bolyai (crater)
- Bomb Crater Pond (Walthamstow)
- Bombala (crater)
- Bombay Rock
- Bombelli (crater)
- Bomber Man World
- Bombergirl
- Bomberman
- Bomberman '93
- Bomberman '94
- Bomberman (1983 video game)
- Bomberman (1990 video game)
- Bomberman (2006 video game)
- Bomberman (Nintendo 3DS game)
- Bomberman (Nintendo DS)
- Bomberman 2
- Bomberman 64 (1997 video game)
- Bomberman 64 (2001 video game)
- Bomberman 64: The Second Attack
- Bomberman Blast
- Bomberman Blitz
- Bomberman Fantasy Race
- Bomberman GB
- Bomberman Generation
- Bomberman Hardball
- Bomberman Hero
- Bomberman II
- Bomberman Jetters (video game)
- Bomberman Kart
- Bomberman Land
- Bomberman Land (PSP)
- Bomberman Land (Wii)
- Bomberman Land 2
- Bomberman Land Touch!
- Bomberman Land Touch! 2
- Bomberman Legends
- Bomberman Live
- Bomberman Live: Battlefest
- Bomberman Max
- Bomberman Max 2
- Bomberman Online
- Bomberman Party Edition
- Bomberman Quest
- Bomberman Story DS
- Bomberman Touch
- Bomberman Tournament
- Bomberman Ultra
- Bomberman Wars
- Bomberman World
- Bomberman: Act Zero
- Bomberman: Panic Bomber
- Bombing of Peenemünde in World War II
- Bombing of the Bezuidenhout
- Bombshells (House)
- Bonaventura Cavalieri
- Bond (Chinese constellation)
- Bond (crater)
- Bond albedo
- Bondarenko (crater)
- Bonded Fibre Matrix
- Bondi Beach Cultural Landscape
- Bondi Sands
- Bondi accretion
- Bondi–Metzner–Sachs group
- Bone (1972 film)
- Bone Wars
- Bones (2001 film)
- Bonestell (crater)
- Bonet de Lattes
- Bonfire
- Bonfire Night
- Bonfire toffee
- Bongbong (rocket)
- Bongkrek acid
- Bonilla observation
- Boninite
- Bonnard J. Teegarden
- Bonner sphere
- Bonneville (crater)
- Bonnie Buratti
- Bonnie J. Dunbar
- Bonnie Ross
- Bonnie X Clyde
- Bonnie's Kids
- Bonnor beam
- Bonnor–Ebert mass
- Bonpland (crater)
- Boo 2! A Madea Halloween
- Boo Moon
- Boo to You Too! Winnie the Pooh
- Boo! A Madea Halloween
- Book of Abraham
- Book of Dreams (novel)
- Book of Fixed Stars
- Book of Moses
- Book of Nut
- Book of Optics
- Book of Wonders
- Book of the Nine Rocks
- Booka Shade
- Booking (clubbing)
- Boolardy
- Boole (crater)
- BoomSAR
- Boomerang Nebula
- Booming Ice Chasm
- Boonshoft Museum of Discovery
- Boost-glide
- Boosted Arcas
- Boosted Dart
- Booster pump
- Booster separation motor
- Boot Hill (lunar mountain)
- Boothite
- Bootie (club night)
- Bootstrap current
- Bopolu (crater)
- Bora (Australian)
- Borchgrevink orogeny
- Borda (crater)
- Bordeaux Observatory
- Bordeaux Segalen University
- Border Down
- Borderlands (series)
- Borderlands (video game)
- Borderlands 2
- Borderlands 3
- Borderlands: The Pre-Sequel
- Borderline (Madonna song)
- Borders of the oceans
- Borde–Guth–Vilenkin theorem
- Boreal Biogeographic Region
- Borealis Planitia
- Boreas (journal)
- Borel (crater)
- Borexino
- Boring (earth)
- Boring Billion
- Borirane
- Boris (crater)
- Boris Brejcha
- Boris Chertok
- Boris Dlugosch
- Boris Gerasimovich
- Boris Kadomtsev
- Boris Katorgin
- Boris Komitov
- Boris Morukov
- Boris Rauschenbach
- Boris Vallejo
- Boris Volynov
- Boris Vorontsov-Velyaminov
- Boris Yegorov
- Borman (crater)
- Born (crater)
- Borneo SubOrbitals
- Born–Infeld model
- Borobudur
- Borobudur Temple Compounds
- Boron
- Boron on Mars
- Borowiec Astrogeodynamic Observatory
- Bortle scale
- Boruto Uzumaki
- Borya (crater)
- Bosch (crater)
- Boscombe Bowmen
- Boscovich (crater)
- Bose (crater)
- Boshra Salem
- Bosko's Knight-Mare
- Bosonic string theory
- Boss (crater)
- Boss General Catalogue
- Boss Nigger
- Bosscha Observatory
- Boston Camera
- Boston Journal of Natural History
- Boston Opera House
- Boswell Observatory
- Botanical expedition
- Botswana
- Botticelli (crater)
- Bottle service
- Bottlebrush (cave formation)
- Bottled gas
- Bottom ash
- Bottom crawler
- Bottom water
- Bouguer (Martian crater)
- Bouguer (lunar crater)
- Bouguer anomaly
- Boulder
- Boulder choke
- Boulder clay
- Boulet Brothers
- Boulevard Theater (Miami)
- Boulevard of Broken Dreams (Green Day song)
- Boulia (crater)
- Bounce Rock
- Bouncer (doorman)
- Bouncing Babies
- Bound to Vengeance
- Bound water
- Boundary-Layer Meteorology
- Boundless (video game)
- Bourbon Tunnel
- Bourges Cathedral
- Bourne (stream)
- Boussingault (crater)
- Bousso's holographic bound
- Bovedy (meteorite)
- Bow City crater
- Bow shock
- Bowditch (crater)
- Bowen (crater)
- Bowen-Apollo (crater)
- Bowers Basebed
- Bowman Observatory
- Box Mine
- Box orbit
- Box-bed
- Box-spring
- Boxers NYC Washington Heights
- Boxhole crater
- Boxing Helena
- Boy George
- Boyd Morrison
- Boyd Theatre
- Boyden Observatory
- Boyer–Lindquist coordinates
- Boyhood Daze
- Boyle (crater)
- Boys Noize
- Boznańska (crater)
- Boösaule Montes
- Boötes
- Boötes I (dwarf galaxy)
- Boötes II (dwarf galaxy)
- Boötes III (dwarf galaxy)
- Boötes in Chinese astronomy
- Boötes void
- Boštjan Burger
- Bracewell probe
- Brachina meteorite
- Brachinite
- Bracken House, London
- Brackett (crater)
- Brackish marsh
- Brackish water
- Brad Bird
- Brad Neely's Harg Nallin' Sclopio Peepio
- Brad Steiger
- Brad Turner (director)
- Brad W. Foster
- Brad Wright
- Bradbury Landing
- Braden Allenby
- Bradford A. Smith
- Bradford Parkinson
- Bradford Robotic Telescope
- Bradley C. Edwards
- Bradley Observatory
- Bradley Schaefer
- Bradshaw model
- Bradstreet Observatory
- Bradyseism
- Braeside Observatory
- Bragg (crater)
- Bragg plane
- Bragg's law
- Brahin (meteorite)
- Brahmadeva
- Brahms (crater)
- Braid bar
- Braided river
- Brain Damage (film)
- Brain Damage (song)
- Brain terrain
- Brainiac (story arc)
- Brains (Thunderbirds)
- Brainship
- Brake to Vacate
- Brallobarbital
- Bramante (crater)
- Bramertonian Stage
- Bramshill House
- Brand New Day (Agents of S.H.I.E.L.D.)
- Brandenburg Concertos
- Brandon Block
- Brandon Reilly (musician)
- Brane
- Brane cosmology
- Branner Earth Sciences Library
- Brans–Dicke theory
- Brashear (Martian crater)
- Brashear (lunar crater)
- Brasilsat B1
- Brasilsat B2
- Brasilsat B3
- Brasilsat-A1
- Brasilsat-A2
- Brassica rapa
- Bratschen
- Brattle Theatre
- Braude (crater)
- Braunschweig meteorite
- BraveStarr
- BraveStarr: The Movie
- Bravest Warriors
- Brayley (crater)
- Brazil (1985 film)
- Brazil lunar sample displays
- Brazilea
- Brazilian Decimetric Array
- Brazilian Highlands
- Brazilian Journal of Geology
- Brazilian Space Agency
- Brazilian funnel-eared bat
- Brazilian space program
- Break Free (song)
- Breakaway (Space: 1999)
- Breakdown voltage
- Breaking Strain
- Breakthrough Enceladus mission
- Breakthrough Initiatives
- Breakthrough Listen
- Breakthrough Propulsion Physics Program
- Breakthrough Starshot
- Breathalyzer
- Breathe (Pink Floyd song)
- Breathing
- Brecon Beacons
- Brecon Beacons National Park
- Bredikhin (crater)
- Breeds There a Man...?
- Breislak (crater)
- Breit frame
- Bremsstrahlung
- Bren School of Environmental Science & Management
- Brenda Dingus
- Brenham (meteorite)
- Brenna Flaugher
- Brenner (crater)
- Brent W. Jett Jr.
- Brent crater
- Brera Astronomical Observatory
- Bresser
- Brett Cantor
- Brett Denevi
- Brett J. Gladman
- Brett Leonard
- Brevibacillus borstelensis
- Brevibacterium
- Brevibacterium iodinum
- Brewers Fayre
- Brewster (crater)
- Brewster H. Shaw
- Brewster angle microscope
- Brewster's angle
- Brezinaite
- Brian "Little Legs" Clifford
- Brian A. Skiff
- Brian Aldiss
- Brian Attebery
- Brian Binnie
- Brian Bowsher
- Brian Cox (physicist)
- Brian Duffy (astronaut)
- Brian G. Marsden
- Brian G. W. Manning
- Brian Keating
- Brian Mason (geochemist)
- Brian May
- Brian Milton
- Brian Nord
- Brian O'Leary
- Brian Orr
- Brian P. Roman
- Brian Redman
- Brian Schmidt
- Brian Stableford
- Brian Swimme
- Brian Thomsen
- Brian Williamson
- Brianchon (crater)
- Brianite
- Briault (crater)
- Brick Bradford (serial)
- Brickearth
- Bride of the Monster
- Bride of the Robot
- Brides of March
- Bridge (crater)
- Bridge End Inn
- Bridge scour
- Bridgeland stability condition
- Bridgeport Village (Oregon)
- Bridget Everett
- Bridgewater Triangle
- Bridgman (crater)
- Brief Answers to the Big Questions
- Briggs (crater)
- Bright Sparklers Fireworks disaster
- Bright Star Catalogue
- Bright giant
- Bright spots on Ceres
- Brightburn
- Brightest cluster galaxy
- Brightness Reef
- Brightness temperature
- Brigitta Sipőcz
- Brihat Jataka
- Brihat Parashara Hora Shastra
- Brik-II (satellite)
- Brilliant Pebbles
- Brillouin spectroscopy
- Brillouin zone
- Brine
- Brine pool
- Brine rejection
- Brine shrimp
- Bring the Boys Back Home
- Bringing Back the Bluestones
- Brinsley Le Poer Trench, 8th Earl of Clancarty
- Bris sextant
- Brisbane (lunar crater)
- Brisbane Limited
- Brisbane tuff
- Bristol Aerospace
- Bristol Spaceplanes
- Bristol Youth Strike 4 Climate
- BritGrav
- Britannia Illustrata
- Britannia, Richmond
- British Aerospace
- British Aerospace HOTOL
- British Astronomical Association
- British Cartographic Society
- British Film Institute
- British Firework Championships
- British Interplanetary Society
- British Mid-Ocean Ridge Initiative
- British National Committee for Space Research
- British National Space Centre
- British Oceanographic Data Centre
- British Pyrotechnists Association
- British Rail flying saucer
- British Sleep Society
- British Society for Geomorphology
- British UFO Research Association
- British and Irish Meteorite Society
- British and World Marbles Championship
- British commercial spaceport competition
- British space programme
- British television Apollo 11 coverage
- Brittle–ductile transition zone
- Broad Band X-ray Telescope
- Broadband Global Area Network
- Broadband acoustic resonance dissolution spectroscopy
- Broadband viscoelastic spectroscopy
- Broadcasting Satellite System Corporation
- Broadway Cinema
- Broadway Limited
- Broadway Open House
- Brocadia fulgida
- Brocchi's Cluster
- Brockia
- Brockia lithotrophica
- Brocks Fireworks
- Broglio Space Center
- Broken Bow (Star Trek: Enterprise)
- Bromazepam
- Bromisoval
- Bromley House Library
- Bromocresol green
- Bromocresol purple
- Bromophenol blue
- Bromothymol blue
- Bromoureide
- Bronk (crater)
- Bronnant Fault
- Brontinus
- Brontë (Mercurian crater)
- Brontë (lunar crater)
- Brooke Owens
- Brooke Owens Fellowship
- Brookhill Tavern
- Brookings Report
- Brooklyn Paramount Theater
- Brooks (crater)
- Brooks Astronomical Observatory
- Brooks Observatory
- Brooks Pate
- Broom-Stick Bunny
- Brophebarbital
- Brorfelde Observatory
- Brother Brown
- Brotherhood of Death
- Brothers Hildebrandt
- Brothers in Rhythm
- Brothers of Earth
- Brouwer (crater)
- Brouwer Award (Division on Dynamical Astronomy)
- Brown (crater)
- Brown Bear, Whitechapel
- Brown dwarf
- Brown earth
- Brown podzolic
- Brown-dwarf desert
- Brownie Chasma
- Bruce (crater)
- Bruce A. McIntosh
- Bruce Allen (physicist)
- Bruce Barrymore Halpenny
- Bruce Bugbee
- Bruce C. Murray
- Bruce Cathie
- Bruce E. Melnick
- Bruce Elmegreen
- Bruce Gillespie
- Bruce Hapke
- Bruce Jakosky
- Bruce Jensen
- Bruce Lusignan
- Bruce Maccabee
- Bruce McCandless II
- Bruce Medal
- Bruce Pelz
- Bruce Pennington
- Bruce Peterson
- Bruce Runnegar
- Bruce Sterling
- Bruce T. Draine
- Bruce Winstein
- Bruce Woodgate
- Bruceploitation
- Bruegel (crater)
- Brukkaros Solar Observatory
- Brumaire
- Brunelleschi (crater)
- Brunner (crater)
- Bruno Leibundgut
- Bruno Oberle
- Bruno Rossi
- Bruno Rossi Prize
- Bruno Thüring
- Bruno della Chiesa
- Brunswick star
- Brunt–Väisälä frequency
- Bruny Island Radio Spectrometer
- Brush Electric Illuminating Company
- Brush discharge
- Brute Corps
- Brute Force (video game)
- Bruxism
- Bryan Allen (hang glider)
- Bryan D. O'Connor
- Bryan Gaensler
- Bryan Lunney
- Bryan Robin
- Bryan Singer
- Bryan Versteeg
- Bryan-Gooding Planetarium
- Bryce DeWitt
- Bryneglwys Fault
- Bryocella
- Bryocella elongata
- Bubble Nebula (NGC 6822)
- Bubble and Squeak (video game)
- Bubble fusion
- Bubble octant
- Bubble point
- Bubnoff unit
- Bubo osvaldoi
- Bubsy 3D
- Bubup
- Buch (crater)
- Bucharest Observatory
- Buchberger Leite
- Buck (crater)
- Buck Danny
- Buck Nelson
- Buck Rogers
- Buck Rogers (serial)
- Buck Rogers XXVC
- Buck Rogers in the 25th Century (TV series)
- Buck Rogers in the 25th Century (film)
- Buck Rogers in the 25th Century (radio series)
- Buck Rogers: A Life in the Future
- Buck Rogers: Countdown to Doomsday
- Buck Rogers: Matrix Cubed
- Bucket argument
- Buckethead
- Bucktown (film)
- Bucky O'Hare (NES video game)
- Bucky O'Hare (arcade game)
- Bucky O'Hare and the Toad Wars
- Bucolome
- Bucureștioara River
- Budd Hopkins
- Buddha's Little Finger (film)
- Buddhism and evolution
- Buddy Greco
- Buddy's Bug Hunt
- Budh Planitia
- Budha
- Buehler Planetarium and Observatory
- Buena Vista, Peru
- Buffalo Automation
- Buffer gas
- Buffer strip
- Buffer-gas trap
- Buffon (crater)
- Bug-eyed monster
- BugSat 1
- Bugang
- Bugs Bunny in Double Trouble
- Bugs Bunny's Howl-oween Special
- Building engineering physics
- Built-in hold
- Built-in test equipment
- Buisson (crater)
- Buiten De Zone
- Bujeo
- Buket Uzuner
- Bulbophyllum nocturnum
- Bulgar calendar
- Bulgaria 1300
- BulgariaSat-1
- Bulgarian Astronautical Society
- Bulgarian cosmonaut program
- Bulgarian names in space
- Bulk density
- Bulk soil
- Bulkhead line
- Bull Arm Formation
- Bull Inn, Sonning
- Bull's Head Inn, Poole
- Bull's Head, Strand-on-the-Green
- Bullerwell Lecture
- Bullet Cluster
- Bullet Galaxy
- Bullet Group
- Bulletin de la Société Géologique de France
- Bulletin of Engineering Geology and the Environment
- Bulletin of Geosciences
- Bulletin of Glaciological Research
- Bulletin of Marine Science
- Bulletin of Volcanology
- Bulletin of the American Astronomical Society
- Bulletin of the American Meteorological Society
- Bulletin of the Astronomical Society of India
- Bulletin of the Geological Society of Finland
- Bulletin of the Iraq Natural History Museum
- Bulletin of the Natural History Museum
- Bulletin of the Seismological Society of America
- Bulletstorm
- Bullialdus (crater)
- Bullock Texas State History Museum
- Bully (2001 film)
- Bullyparade – Der Film
- Bumblebee models
- Bumblebeee
- Bumfights
- Bumpy torus
- Bunburra Rockhole (meteorite)
- Bunch of Grapes, Knightsbridge
- Bundesamt für Eich- und Vermessungswesen
- Bundesverband der Deutschen Luft- und Raumfahrtindustrie
- Bundle adjustment
- Bundling (tradition)
- Bunene
- Bunin (crater)
- Bunk bed
- Bunker (Berlin)
- Bunkie board
- Bunsen (crater)
- Bura Tamori
- Buran (spacecraft)
- Buran programme
- Burckhardt (crater)
- Burckle Crater
- Bureau des Longitudes
- Bureau of Oceans and International Environmental and Scientific Affairs
- Bureau of Population, Refugees, and Migration
- Burial vault (tomb)
- Buried Valley Aquifer System
- Buried rupture earthquake
- Buried valley
- Burke (crater)
- Burkina Faso
- Burlesque (compilation album)
- Burlingtons Bar
- Burmese zodiac
- Burn (landform)
- Burn recovery bed
- Burn, Witch. Burn! (American Horror Story)
- Burnham (crater)
- Burnham Double Star Catalogue
- Burning Bridges (Pink Floyd song)
- Burning Heart (novel)
- Burning Pink
- Burning bush
- Burns (crater)
- Burns and Porter
- Burroughs (crater)
- Bursting Pulsar
- Burt Rutan
- Burton (crater)
- Burton Edelson
- Buru boobook
- Burundi
- Bury Me an Angel
- Burying the Ex
- Burçin Mutlu-Pakdil
- Busan International Fireworks Festival
- Busek
- Bush Barrow
- Bushnell Corporation
- Bushwhacked (Firefly)
- Bushwick Inlet Park
- Business ecosystem
- Bussard ramjet
- Busy Philipps
- Butabarbital
- Butalbital
- Butallylonal
- Butcher Billy
- Butcher, Baker, Nightmare Maker
- Butcher–Oemler Effect
- Butlerov (crater)
- Butobarbital
- Butt and Oyster
- Butte Special
- Butterfield dial
- Butterflies and Hurricanes
- Butterfly Cluster
- Button Moon
- Buttoned Down Disco
- Buvinda Vallis
- Buys Ballot Medal
- Buys-Ballot (crater)
- Buzz Aldrin
- Buzz Lightyear
- Buzz Lightyear of Star Command
- Buzz Lightyear of Star Command (video game)
- Buzz Lightyear of Star Command: The Adventure Begins
- Buzz Lightyear's Space Ranger Spin
- Buzzard Coulee meteorite
- By Any Other Name
- By the Sun and Stars
- ByTowne Cinema
- Byrd (lunar crater)
- Byrd Theatre
- Byrgius (crater)
- Byrhtferth
- Byron (crater)
- Byron Haskin
- Byron K. Lichtenberg
- Byron Preiss
- Bytham River
- Byurakan Observatory
- Byzantine calendar
- Byzantine time
- BzK galaxy
- Bärbel Koribalski
- Béla Harkányi
- Bélier (rocket)
- Börde
- Bùi Thanh Liêm
- Bülach Observatory
- Bürg (crater)
- Büsching (crater)
- Břetislav Staš
- Bṛhaspati
- C Aquarii
- C Capricorni
- C Carinae
- C Centauri
- C Puppis
- C Scorpii
- C Ursae Majoris
- C Velorum
- C-41 (rocket)
- C-57D
- C-Band All Sky Survey
- C-type asteroid
- C. B. Collins
- C. C. L. Gregory
- C. Donald Shane
- C. Donald Shane telescope
- C. Doris Hellman
- C. E. K. Mees Observatory
- C. Gordon Fullerton
- C. H. Mullan
- C. Herschel (crater)
- C. Marcella Carollo
- C. Mayer (crater)
- C. Michelle Olmstead
- C. V. Raman
- C. V. Vishveshwara
- C.C. and Company
- C.O.D. (musician)
- C/1652 Y1
- C/1702 H1
- C/1760 A1
- C/1769 P1
- C/1807 R1
- C/1847 T1
- C/1861 G1 (Thatcher)
- C/1861 J1
- C/1865 B1
- C/1874 H1
- C/1881 K1
- C/1890 V1
- C/1911 O1
- C/1911 S3
- C/1948 V1
- C/1957 P1 (Mrkos)
- C/1980 E1 (Bowell)
- C/1989 X1 (Austin)
- C/1992 J1 (Spacewatch)
- C/1999 F1 (Catalina)
- C/1999 J6 (SOHO)
- C/1999 S4 (LINEAR)
- C/2000 U5 (LINEAR)
- C/2000 W1 (Utsunomiya-Jones)
- C/2001 OG108
- C/2001 Q4 (NEAT)
- C/2002 T7
- C/2002 V1 (NEAT)
- C/2003 A2 (Gleason)
- C/2006 M4 (SWAN)
- C/2006 P1 (McNaught)
- C/2006 VZ13 (LINEAR)
- C/2007 E2 (Lovejoy)
- C/2007 F1
- C/2007 K5 (Lovejoy)
- C/2007 Q3 (Siding Spring)
- C/2007 W1 (Boattini)
- C/2008 T2 (Cardinal)
- C/2009 R1 (McNaught)
- C/2010 X1 (Elenin)
- C/2011 J2 (LINEAR)
- C/2011 L4
- C/2011 W3 (Lovejoy)
- C/2012 E2 (SWAN)
- C/2012 F6 (Lemmon)
- C/2012 K1
- C/2012 S4
- C/2013 A1 (Siding Spring)
- C/2013 R1
- C/2013 UQ4 (Catalina)
- C/2013 US10 (Catalina)
- C/2013 V5 (Oukaimeden)
- C/2014 E2 (Jacques)
- C/2014 G3
- C/2014 Q1 (PANSTARRS)
- C/2014 Q2 (Lovejoy)
- C/2014 Q3 (Borisov)
- C/2015 ER61 (PANSTARRS)
- C/2015 F3
- C/2015 F5 (SWAN-XingMing)
- C/2015 G2 (MASTER)
- C/2015 V2 (Johnson)
- C/2016 M1 (PANSTARRS)
- C/2016 R2 (PANSTARRS)
- C/2016 U1 (NEOWISE)
- C/2017 K2
- C/2017 T1 (Heinze)
- C/2017 T2 (PANSTARRS)
- C/2017 U7
- C/2018 C2 (Lemmon)
- C/2018 F4 (PANSTARRS)
- C/2018 V1 (Machholz-Fujikawa-Iwamoto)
- C/2018 Y1 (Iwamoto)
- C/2019 E3 (ATLAS)
- C/2019 U6 (LEMMON)
- C/2019 Y1 (ATLAS)
- C/2019 Y4 (ATLAS)
- C/2020 F5 (MASTER)
- C/2020 F8 (SWAN)
- C/NOFS
- C23 tragedy
- C2A
- C3 Centauri
- C4MIP
- C57BL/6
- CAA Theatre
- CAB Direct (database)
- CACTUS
- CAE Inc.
- CAESAR (spacecraft)
- CALIPSO
- CALLISTO
- CALPUFF
- CALUX
- CAMEO (satellite)
- CAPE-1
- CAPECON project
- CAPSTONE (spacecraft)
- CARTE Museum
- CAS parameters
- CASA (aircraft manufacturer)
- CASSIOPE
- CAT-1
- CBERS-1
- CBERS-2
- CBERS-2B
- CBERS-3
- CBERS-4
- CC Andromedae
- CCCma
- CCPForge
- CCSDS 122.0-B-1
- CCSDS MO Services
- CCSDS Mission Operations
- CD Crucis
- CD-38 2551
- CE Gruis
- CEATSA
- CEIPP
- CELPA (El Chamical)
- CELPA (Mar Chiquita)
- CEMP star
- CENBOL
- CERES (satellite)
- CERGA Observatory
- CERN Axion Solar Telescope
- CERN Neutrinos to Gran Sasso
- CESRA
- CFBDS J005910.90–011401.3
- CFBDSIR 1458+10
- CFBDSIR 2149−0403
- CFESat
- CFHQS J2329-0301
- CG 4
- CGCG 049-033
- CGHS model
- CH Crucis
- CH Cygni
- CH star
- CHAMP (satellite)
- CHARA array
- CHARISSA
- CHEOPS
- CHICOS
- CHIPSat
- CHIRP (algorithm)
- CHON
- CHXR 73
- CI Tauri
- CI1 fossils
- CICE (sea ice model)
- CID-42
- CINDI
- CIOMS/RUCAM scale
- CISL Research Data Archive
- CK Carinae
- CK Vulpeculae
- CL Draconis
- CL J1001+0220
- CL0024+17
- CL1358+62
- CLARREO
- CLAS detector
- CLASS B1359+154
- CLAW hypothesis
- CLEAN (algorithm)
- CLEO (router)
- CLIO
- CLIWOC
- CLOUD experiment
- CLUPI
- CLaMS
- CM Draconis
- CMAQ
- CMB cold spot
- CMBFAST
- CMBStar-1
- CMS-01
- CN Andromedae
- CN star
- CNES
- CNO cycle
- CO-0.40-0.22
- CO2 fertilization effect
- CO2 rocket
- COM DEV International
- COMPASS-2
- CONSERT
- CONTOUR
- CORA dataset
- CORONA (rocket)
- COSMIC-2
- COSMO-1
- COSMO-SkyMed
- COSMOS International
- COSMOSOMAS
- COSPAR international reference atmosphere
- CP Boötis
- CP Lacertae
- CP Puppis
- CP violation
- CP-823/U
- CP6 (satellite)
- CPD−57°2874
- CQ Camelopardalis
- CRRES
- CS Camelopardalis
- CS-4
- CSA Scientific Research on the International Space Station
- CSES Mission
- CSIRO
- CSIRO Oceans and Atmosphere
- CSTS
- CT Chamaeleontis
- CT Serpentis
- CTA-102
- CTD (instrument)
- CTL-mediated cytotoxicity
- CU Spaceflight
- CU Virginis
- CUORE
- CUTE-1.7 + APD
- CUTE-1.7 + APD II
- CVSO 30
- CW Leonis
- CX Canis Majoris
- CXOU J061705.3+222127
- CXOU J164710.2−455216
- CYP119A1
- Cab Calloway
- Cabane Choucoune
- Cabannes (crater)
- Cabaret
- Cabaret (musical)
- Cabaret Cornichon
- Cabaret de L'Enfer
- Cabaret des Quat'z'Arts
- Cabaret du Ciel
- Cabaret du Néant
- Cabbeling
- Cabeus (crater)
- Cabify
- Cabin Boy
- Cabinet of curiosities
- Cable bacteria
- Cabled observatory
- Cabo Wabo
- Cabo da Roca
- Cachalot (novel)
- Cachaça (nightclub)
- Cache Creek Ocean
- Cachecam
- Cachet Fault
- Cadarache
- Cadejo Macula
- Cadent house
- Cadillac Palace Theatre
- Cadran solaire
- Caelum
- Caelum Supercluster
- Caesar Jenkyns
- Caesar's Comet
- Cafe con Leche (Sunday party)
- Caffeine-induced sleep disorder
- Café 't Mandje
- Café d'Anvers (Club)
- Café de la Rotonde
- Cage bed
- Caged Desires
- Caged Fury (1989 film)
- Cageworld series
- Cagigal Observatory
- Cagliari Observatory
- Cahokia Woodhenge
- Cai Lun (crater)
- Cailleux (crater)
- Cain's Cutthroats
- Cairo Demographic Center
- Cajal (crater)
- Cajori (crater)
- Cajun (rocket)
- Cajun Dart
- Cake (firework)
- Cal Langley
- CalSky
- Calabash Nebula
- Calabi flow
- Calabi–Yau manifold
- Calahorra (crater)
- Calar Alto Legacy Integral Field Area Survey
- Calar Alto Observatory
- Calcareous
- Calcareous grassland
- Calcein
- Calcid
- Calciorthid
- Calcisol
- Calcium sulfide
- Calcium triplet
- Calcium-rich supernovae
- Calcium–aluminium-rich inclusion
- Calculating God
- Caldanaerobacter
- Caldanaerobacter uzonensis
- Caldanaerobius
- Caldanaerobius fijiensis
- Caldanaerobius polysaccharolyticus
- Caldanaerobius zeae
- Caldanaerovirga
- Calder (crater)
- Caldicellulosiruptor
- Caldicellulosiruptor bescii
- Caldicellulosiruptor saccharolyticus
- Caldicoprobacter algeriensis
- Caldicoprobacter faecalis
- Caldicoprobacter guelmensis
- Caldicoprobacter oshimai
- Caldilinea aerophila
- Caldimicrobium rimae
- Caldimicrobium thiodismutans
- Caldisericum
- Caldisphaera
- Caldisphaeraceae
- Caldithrix
- Caldivirga
- Caldococcus
- Caldwell catalogue
- Caleb Scharf
- Caledonian Sleeper
- Calends
- Caleuche Chasma
- Caliban (moon)
- Caliban's War
- Calibre (musician)
- Caliche
- California Academy of Sciences
- California Extremely Large Telescope
- California Girls (film)
- California Limited
- California Nebula
- California River
- California Science Center
- California Space Authority
- California Theatre (Los Angeles)
- California Volcano Observatory
- California Zephyr
- California Zephyr (1949–1970)
- California lunar sample displays
- California v. Murray
- Californians for Population Stabilization
- Californium (video game)
- Caligula (film)
- Calippus (crater)
- Call Girl (2012 film)
- Call of Duty: Black Ops
- Call of Duty: Ghosts
- Call of Duty: Infinite Warfare
- Callanish Stones
- Callicrates (crater)
- Calling All the Monsters
- Calling Occupants of Interplanetary Craft
- Calliphon of Croton
- Callippic cycle
- Callirrhoe (moon)
- Callista trilogy
- Callisto (moon)
- Callows
- Calmagite
- Caloranaerobacter azorensis
- Caloranaerobacter ferrireducens
- Caloribacterium
- Calories (story)
- Calorimetric Electron Telescope
- Caloris Group
- Caloris Montes
- Caloris Planitia
- Caltech Submillimeter Observatory
- Calusa Nature Center and Planetarium
- Calvera (X-ray source)
- Calvert DeForest
- Calvin crater
- Calvino (crater)
- Calvin–Rehoboth Observatory
- Calydon fossa
- Calypso (moon)
- Calypso Deep
- Calán/Tololo Survey
- Camazepam
- Camazotz
- Cambion
- Cambisol
- Cambria (journal)
- Cambridge Interferometer
- Cambridge Low Frequency Synthesis Telescope
- Cambridge Observatory
- Cambridge Optical Aperture Synthesis Telescope
- Camelford water pollution incident
- Camelopardalis
- Camelopardalis in Chinese astronomy
- Camelot (TV series)
- Camelot (crater)
- Camelot 30K
- Camera, hand lens, and microscope probe
- Cameron (crater)
- Cameron Leslie (businessman)
- Cameron Mitchell (Stargate)
- Camille (Red Dwarf)
- Camille 2000
- Camille Cazedessus Jr.
- Camille Flammarion Observatory
- Camillo Leonardi
- Camp Hazen
- Camp bed
- Campanus (crater)
- Campanus of Novara
- Campbell (Martian crater)
- Campbell (lunar crater)
- Campo Imperatore Near-Earth Object Survey
- Campo del Cielo
- Campylobacter
- Camões (crater)
- Can of Worms (Red Dwarf)
- Can of Worms (film)
- CanSat
- Canada After Dark
- Canada Centre for Mapping and Earth Observation
- Canadarm
- Canada–France–Hawaii Telescope
- Canadian (train)
- Canadian Advanced Nanospace eXperiment Program
- Canadian Arrow
- Canadian Association of Rocketry
- Canadian Astronaut Corps
- Canadian Cartographic Association
- Canadian GeoAlliance
- Canadian Geospace Monitoring
- Canadian Geotechnical Journal
- Canadian Hydrogen Intensity Mapping Experiment
- Canadian Institute for Theoretical Astrophysics
- Canadian Institute of Geomatics
- Canadian Journal of Earth Sciences
- Canadian Journal of Remote Sensing
- Canadian Land Surface Scheme
- Canadian Penning Trap Mass Spectrometer
- Canadian Reflections
- Canadian Remote Sensing Society
- Canadian Shield
- Canadian Sleep Society
- Canadian Society of Soil Science
- Canadian Space Agency
- Canadian Sport Parachuting Association
- Canadian Youth Climate Coalition
- Canadian system of soil classification
- Canal
- Canal Room
- Canberra Deep Space Communication Complex
- Canceled Apollo missions
- Canceled Space Shuttle missions
- Cancer (astrology)
- Cancer (constellation)
- Cancer Minor (constellation)
- Cancer in Chinese astronomy
- Cancer slope factor
- Candas Jane Dorsey
- Candice Hansen-Koharcheck
- Candidatus Brocadia anammoxidans
- Candidatus Desulforudis audaxviator
- Candidatus Scalindua
- Candor Chasma
- Candy
- Candy Stripe Nurses
- Candy and a Currant Bun
- Candy apple
- Candy corn
- Candy pumpkin
- Canecão Mineiro nightclub fire
- Canes II Group
- Canes Venatici
- Canes Venatici I (dwarf galaxy)
- Canes Venatici II (dwarf galaxy)
- Canes Venatici in Chinese astronomy
- Canfield joint
- Canfield ocean
- Canis Major
- Canis Major Overdensity
- Canis Major in Chinese astronomy
- Canis Minor
- Canis Minor in Chinese astronomy
- Canis-Minorids
- Cannes Mandelieu Space Center
- Cannibal Terror
- Cannibal film
- Cannibal! The Musical
- Canning Basin
- Canning Randy
- Cannizzaro (crater)
- Cannon (crater)
- Canon Episcopi
- Canon of Eclipses
- Canon of Kings
- Canonical quantum gravity
- Canonical units
- Canopus
- Canopus (mythology)
- Canopus 2
- Canopus Hill Observatory
- Canopus in Argos
- Canopy bed
- Canopy interception
- Canso (Martian crater)
- Cantera (stone)
- Cantilever enhanced photoacoustic spectroscopy
- Cantor (crater)
- Canyon (satellite)
- Canyon Diablo (meteorite)
- Caotun Night Market
- Cap carbonate
- Capacitance probe
- Capacitively coupled plasma
- Cape (geography)
- Cape Baba
- Cape Canaveral Launch Complex 1
- Cape Canaveral Launch Complex 10
- Cape Canaveral Launch Complex 14
- Cape Canaveral Launch Complex 15
- Cape Canaveral Launch Complex 16
- Cape Canaveral Launch Complex 19
- Cape Canaveral Launch Complex 2
- Cape Canaveral Launch Complex 25
- Cape Canaveral Launch Complex 26
- Cape Canaveral Launch Complex 29
- Cape Canaveral Launch Complex 3
- Cape Canaveral Launch Complex 30
- Cape Canaveral Launch Complex 31
- Cape Canaveral Launch Complex 34
- Cape Canaveral Launch Complex 4
- Cape Canaveral Launch Complex 43
- Cape Canaveral Launch Complex 5
- Cape Canaveral Launch Complex 9
- Cape Canaveral Space Force Station
- Cape Canaveral Space Launch Complex 20
- Cape Canaveral Space Launch Complex 37
- Cape Chelyuskin
- Cape Dezhnev
- Cape Eluanbi
- Cape Fligely
- Cape Flissingsky
- Cape Froward
- Cape Horn
- Cape Nordkinn
- Cape Photographic Catalogue
- Cape Prince of Wales
- Cape Provinces
- Cape St. Charles
- Cape Town Treaty
- Cape Tribulation (Mars)
- Cape Verde (Mars)
- Cape York (Mars)
- Cape York International Spaceport
- Cape York Peninsula
- Cape York meteorite
- Capella
- Capella (crater)
- Capella Space
- Capilla Peak Observatory
- Capillary action
- Capillary flow porometry
- Capillary fringe
- Capitol Cinema (Ottawa)
- Capitol Limited
- Capitol Limited (B&O train)
- Capitol Theatre (New York City)
- Capitol Theatre (Windsor, Ontario)
- Capnophile
- Capote (crater)
- Cappello romano
- Capri Mensa
- Capricorn (astrology)
- Capricorn One
- Capricornio (rocket)
- Capricornus
- Capricornus in Chinese astronomy
- Captain Black (Captain Scarlet)
- Captain Blue (Captain Scarlet)
- Captain EO
- Captain Future
- Captain Haddock
- Captain Harlock
- Captain Ken
- Captain Kremmen
- Captain Marvel (film)
- Captain Olimar
- Captain Power and the Soldiers of the Future
- Captain Scarlet (character)
- Captain Scarlet and the Mysterons
- Captain Scarlet vs. the Mysterons
- Captain Sternn
- Captain Stormfield's Visit to Heaven
- Captain Underpants and the Attack of the Talking Toilets
- Captain Video and His Video Rangers
- Captain Z-Ro
- Captain's Holiday
- Captive State
- Captive Universe
- Capture the Flag (film)
- Capuanus (crater)
- Car Wash (film)
- Caramel apple
- Caramel corn
- Caravaggio (crater)
- Caravan of Courage: An Ewok Adventure
- Carbogen
- Carbon Balance and Management
- Carbon Dioxide Information Analysis Center
- Carbon Disclosure Project
- Carbon Trade Watch
- Carbon arc welding
- Carbon chauvinism
- Carbon cycle
- Carbon detonation
- Carbon dioxide in Earth's atmosphere
- Carbon dioxide scrubber
- Carbon monoxide
- Carbon nanotube
- Carbon planet
- Carbon respiration
- Carbon star
- Carbon-based life
- Carbon-burning process
- Carbon-to-nitrogen ratio
- Carbonate compensation depth
- Carbonates and Evaporites
- Carbonates on Mars
- Carboxydothermus
- Carboxydothermus ferrireducens
- Carboxydothermus islandicus
- Carboxydothermus pertinax
- Carboxydothermus siderophilus
- Carbromal
- Carbubarb
- Cardanus (crater)
- Cardiac rhythm problems during space flight
- Cardiff Rift
- Cardinal (train)
- Cardinal sign (astrology)
- Carducci (crater)
- Cardy formula
- Careem
- Career Achievement Award
- Carefree sundial
- Careful with That Axe, Eugene
- Carey mask
- Cargo (2009 film)
- Cargo (2019 film)
- Cargo Dragon C208
- Cargo spacecraft
- Carhenge
- Caribbean Cinemas
- Carina (constellation)
- Carina Dwarf Spheroidal Galaxy
- Carina Nebula
- Carina OB1
- Carina OB2
- Carina in Chinese astronomy
- Carina–Sagittarius Arm
- Cariocecus
- Carkeek Observatory
- Carl A. Wiley
- Carl A. Wirtanen
- Carl August von Steinheil
- Carl Blaze
- Carl Bremiker
- Carl Charlier
- Carl Clarence Kiess
- Carl Cox
- Carl Critchlow
- Carl E. Heiles
- Carl E. Walz
- Carl Frederik Fearnley
- Carl Friedrich Gauss
- Carl Gottlieb Ehler
- Carl Gustav Witt
- Carl Hollitzer
- Carl J. Meade
- Carl Keenan Seyfert
- Carl Laemmle
- Carl Leo Stearns
- Carl Ludwig Christian Rümker
- Carl Otto Lampland
- Carl R. Disch
- Carl Runge
- Carl Sagan
- Carl Sagan Institute
- Carl Sagan Medal
- Carl Sagan Memorial Award
- Carl Størmer
- Carl Theodor Albrecht
- Carl Theodor Anger
- Carl W. Akerlof
- Carl W. Hergenrother
- Carl Wilhelm Wirtz
- Carl Wolfgang Benjamin Goldschmidt
- Carl Zeiss
- Carl Zeiss AG
- Carl Zeiss Meditec
- Carl Zeiss Planar 50mm f/0.7
- Carl Zeiss SMT
- Carl-Gustaf Rossby Research Medal
- Carl-Zeiss-Stiftung
- Carle M. Pieters
- Carleton (crater)
- Carlini (crater)
- Carlo Cattaneo (mathematician)
- Carlo Resoort
- Carlos Del Castillo
- Carlos Dengler
- Carlos Frenk
- Carlos I. Noriega
- Carlos Jaschek
- Carlos José Lambert
- Carlos Lousto
- Carlos Segers
- Carlos Torres (astronomer)
- Carlos Ulrrico Cesco
- Carlos Varsavsky
- Carlota Escutia Dotti
- Carlotta Maury
- Carlsberg Fault zone
- Carlsberg Meridian Telescope
- Carlsbergite
- Carlton Inn
- Carlton R. Pennypacker
- Carlyle Smith Beals
- Carme (moon)
- Carme group
- Carmel Head Thrust
- Carmelau Monestime
- Carmelle Robert
- Carmichael (crater)
- Carmo Planetarium
- Carn Menyn
- Carnac stones
- Carnal Madness
- Carnarvon Basin
- Carnarvon Tracking Station
- Carnarvon xeric shrublands
- Carnarvon, Western Australia
- Carne (1968 film)
- Carnegie telescope
- Carnets de Géologie
- Carnewas and Bedruthan Steps
- Carnival (Bear novel)
- Carnival of Lost Souls
- Carnival of the Animals (ballet)
- Carnivores (video game)
- Carnot (crater)
- Carny (1980 film)
- Carol Danvers
- Carol Heyer
- Carol Jo Crannell
- Carolan (crater)
- Carole & Tuesday
- Carole Ann Haswell
- Carole Jordan
- Carole Mundell
- Carolin Crawford
- Carolina Special
- Carolina Villagrán
- Caroline Aigle
- Caroline Herschel
- Caroline Herzenberg
- Caroline M. Solomon
- Caroline Smith (scientist)
- Carolyn Meinel
- Carolyn Porco
- Carolyn S. Griner
- Carolyn S. Shoemaker
- Carpainter
- Carpathian Mountains
- Carpe Jugulum
- Carpenter (crater)
- Carpenter Street (Star Trek: Enterprise)
- Carpenter v. United States
- Carpo (moon)
- Carr (landform)
- Carrel (crater)
- Carrie Anderson
- Carrillo (crater)
- Carrington (crater)
- Carrington Event
- Carrying the Fire
- Carse
- Carson Beckett
- Carson Daly
- Carswell crater
- Cartan (crater)
- Cartan–Karlhede algorithm
- Carte du Ciel
- Carter constant
- Cartes du Ciel
- Carthay Circle Theatre
- Cartographic censorship
- Cartographic design
- Cartographic expeditions to Greenland
- Cartographic propaganda
- Cartographica
- Cartography
- Cartography and Geographic Information Science
- Cartography and Geographic Information Society
- Cartography of Africa
- Cartography of Europe
- Cartography of Palestine
- Cartopology
- Cartosat
- Cartosat-1
- Cartosat-2
- Cartosat-2A
- Cartosat-2B
- Cartosat-2C
- Cartosat-2D
- Cartosat-2E
- Cartosat-2F
- Cartosat-3
- Cartouche (cartography)
- Cartwheel Galaxy
- Caru' cu Bere
- Caruso (crater)
- Carver (crater)
- Cary 14 Spectrophotometer
- Casa Grande (soil)
- Casaba-Howitzer
- Casatus (crater)
- Cascade (train)
- Cascade effect
- Cascaded Arc Plasma Source
- Cascades Volcano Observatory
- Case hardening of rocks
- Case is Altered, Eastcote
- Cashel Lookout Formation
- Casimir Marie Gaudibert
- Casimir effect
- Casius quadrangle
- Casper (film)
- Casper Meets Wendy
- Casper's Halloween Special
- Cassandra (Red Dwarf)
- Cassandra Peterson
- Cassegrain (crater)
- Cassegrain Nasmyth
- Cassegrain reflector
- Cassini (Martian crater)
- Cassini (lunar crater)
- Cassini Regio
- Cassini retirement
- Cassini's laws
- Cassini–Huygens
- Cassiopeia (constellation)
- Cassiopeia (film)
- Cassiopeia (train)
- Cassiopeia A
- Cassiopeia Dwarf
- Cassiopeia in Chinese astronomy
- Castalia (spacecraft)
- Castiglione (crater)
- Castle Cinema
- Castle Grayskull
- Castle thunder (sound effect)
- Castleween
- Castor (star)
- Castor Moving Group
- Castor-Orbus
- Cat (zodiac)
- Cat Country (novel)
- Cat Rambo
- Cat's Eye Nebula
- Cat-Women of the Moon
- Cataclysmic variable star
- Catacombs Nightclub Philadelphia
- Catadioptric system
- Catalan Space Agency
- Catalina Real-time Transient Survey
- Catalina Sky Survey
- Catalina Station
- Catalog of 5,268 Standard Stars Based on the Normal System N30
- Catalog of Components of Double and Multiple Stars
- Catalog of Nearby Habitable Systems
- Catalog of Stellar Identifications
- Catalogue of Galaxies and of Clusters of Galaxies
- Catalogue of Nebulae and Clusters of Stars
- Catalogue of Spectroscopic Binary Orbits
- Catalogue of rotational velocities of the stars
- Catalogues of Fundamental Stars
- Catalogus Codicum Astrologorum Graecorum
- Catalán (crater)
- Catania Astrophysical Observatory
- Cataphile
- Cataplexy
- Cataract bog
- Catasterismi
- Catastrophism
- Catathrenia
- Catatumbo lightning
- Catchment hydrology
- Catena (soil)
- Catena Abulfeda
- Catena Artamonov
- Catena Yuri
- Catequilla
- Caterina Scarpellini
- Catharina (crater)
- Catharine Conley
- Catharine Garmany
- Cathedral of St. Michael and St. Gudula
- Catherine Barton
- Catherine Cesarsky
- Catherine Coleman
- Catherine Corrigan
- Catherine Heymans
- Catherine King (scientist)
- Catherine Nakalembe
- Catherine Ritz
- Catherine Wolfe Bruce
- Catherine wheel (firework)
- Catherine, Baroness d'Erlanger
- Cathie Clarke
- Cathryn Mitchell
- Cathy Olkin
- Cation-exchange capacity
- Catlin Seaview Survey
- Catoptrics
- Catra
- Catriona Sparks
- Catseye (novel)
- Catullus (crater)
- Caucasus Mountains
- Cauchy (crater)
- Cauchy surface
- Cauldron (video game)
- Cauldron II: The Pumpkin Strikes Back
- Causal dynamical triangulation
- Causal fermion systems
- Causal patch
- Causal sets
- Causal structure
- Causality (video game)
- Causality conditions
- Cause and Effect (Star Trek: The Next Generation)
- Cavalerius (crater)
- Cavalier (N&W train)
- Cavallo di fuoco
- Cave
- Cave (song)
- Cave Clan
- Cave dweller
- Cave of Dogs
- Cave of Reveillon
- Cave of Treasures
- Cave popcorn
- Cave survey
- Cave5D
- Cavea-B
- Cavendish (crater)
- Cavendish Astrophysics Group
- Cavendish experiment
- Caventou (crater)
- Caves of Mars Project
- Cavity ring-down spectroscopy
- Cawthron Atkinson Observatory
- Caxias (crater)
- Cayley (crater)
- Cayrel's Star
- Caza
- Cebes
- Cebrenia quadrangle
- Cebreros Station
- Cecil (soil)
- Cecil Airport
- Cecil Chubb
- Cecilia Ceccarelli
- Cecilia Payne-Gaposchkin
- Cecilia Tan
- Cedric Gervais
- Cefn-cerig road
- Cefora
- Ceibwr Bay Fault
- Celaeno (star)
- Celatone
- Celaya fireworks disaster
- Cele Goldsmith Lalli
- Celebrate! Tokyo Disneyland
- Celebration of Light
- Celephaïs
- Celestia
- Celestial Matters
- Celestial Mechanics and Dynamical Astronomy
- Celestial Observatory
- Celestial Sphere Woodrow Wilson Memorial
- Celestial cartography
- Celestial coordinate system
- Celestial equator
- Celestial event
- Celestial mechanics
- Celestial navigation
- Celestial pole
- Celestial sphere
- Celestial spheres
- Celestis
- Celestri
- Celestron
- Celio Calcagnini
- Cellular confinement
- Celsius (crater)
- Cementation (geology)
- Cemento
- Cenarchaeaceae
- Cenarchaeales
- Cenarchaeum
- Cenarchaeum symbiosum
- Cenote
- Cenozoic
- Cenozoic Research Laboratory
- Censorinus (crater)
- Census of Marine Life
- Centalun
- Centaur (rocket stage)
- Centaur (small Solar System body)
- Centaure (rocket)
- Centauri Montes
- Centauro event
- Centaurus
- Centaurus (spacecraft mission)
- Centaurus A
- Centaurus A/M83 Group
- Centaurus Cluster
- Centaurus X-3
- Centaurus in Chinese astronomy
- Centennial Challenges
- Centennial Planetarium
- Center Theater (Hartsville, South Carolina)
- Center Theatre (New York City)
- Center for Advanced Materials, University of Houston
- Center for Air and Space Law
- Center for Biofilm Engineering
- Center for Coastal & Ocean Mapping
- Center for Computational Relativity and Gravitation
- Center for Detectors
- Center for Earth Resources Observation and Science
- Center for Earthquake Studies
- Center for Environmental Philosophy
- Center for Gravitational Wave Astronomy
- Center for Integrated Plasma Studies
- Center for Life Detection Science
- Center for Meteorite Studies
- Center for Microbial Oceanography: Research and Education
- Center for Nanophase Materials Sciences
- Center for Nanoscale Materials
- Center for Near-Earth Object Studies
- Center for Southeastern Tropical Advanced Remote Sensing
- Center for Studies and Research in Aeronautical Medicine
- Center for UFO Studies
- Center for Urban and Regional Analysis
- Center of Astronomy (Heidelberg University)
- Center of Research in Astronomy, Astrophysics, and Geophysics
- Center-of-momentum frame
- Centered in the Universe
- Centers for Space Oceanography
- Centiloquium
- Central African Republic
- Central Air Data Computer
- Central American Pacific Islands
- Central American pygmy owl
- Central Basin Spreading Center
- Central Bureau for Astronomical Telegrams
- Central Geological Service
- Central Highlands (Madagascar)
- Central Idaho Dark Sky Reserve
- Central Indo-Pacific
- Central Laser Facility
- Central Line (Tanzania)
- Central Mangrove Wetland
- Central Molecular Zone
- Central Station (gay club, Moscow, Russia)
- Central Station (gay club, Saint-Petersburg, Russia)
- Central configuration
- Central hypoventilation syndrome
- Central massive object
- Central meridian (planets)
- Central nervous system effects from radiation exposure during spaceflight
- Central sleep apnea
- Centre Spatial Universitaire Montpellier-Nîmes
- Centre de données astronomiques de Strasbourg
- Centre for Astrophysics and Supercomputing
- Centre for Astrophysics of the University of Porto
- Centre for Computational Geography
- Centre for International Climate and Environmental Research
- Centre for Life
- Centre for Marine Living Resources & Ecology
- Centre for Polar Observation & Modelling
- Centre for Radiation, Chemical and Environmental Hazards
- Centre interarmées d'essais d'engins spéciaux
- Centrifugal mechanism of acceleration
- Centrifuge Accommodations Module
- Centro de Estudios Científicos
- Centro de Investigaciones de Astronomia
- Century Rain
- Century leap year
- Cepheid variable
- Cepheus (constellation)
- Cepheus (crater)
- Cepheus OB1
- Cepheus in Chinese astronomy
- Ceramic discharge metal-halide lamp
- Ceraunius Fossae
- Ceraunius Tholus
- Cerberus (constellation)
- Cerberus Fossae
- Cerberus Palus
- Cercops
- Cereal Killaz
- Ceres (dwarf planet)
- Ceres Connection
- Ceres Polar Lander
- Ceres Robotics
- Ceres Storm
- Cerise (satellite)
- Cernan Earth and Space Center
- Cerro Armazones Observatory
- Cerro Aspero Batholith
- Cerro Chajnantor Atacama Telescope
- Cerro Colorado Formation
- Cerro Pachón
- Cerro Tololo Inter-American Observatory
- Cerro Toro
- Cerro de la Calavera
- Cerro do Jarau crater
- Cerulli (crater)
- Cervantes (crater)
- Cesare Cremonini (philosopher)
- Cesare Marsili
- Cestrum nocturnum
- Cetus
- Cetus Dwarf
- Cetus in Chinese astronomy
- Cevin Fisher
- CfA 1.2 m Millimeter-Wave Telescope
- CfA Redshift Survey
- CfA2 Great Wall
- Ch'od
- Cha 110913−773444
- ChaHα8
- ChaNGa
- Chabot Space and Science Center
- Chacaltaya
- Chaco Culture National Historical Park
- Chaco owl
- Chacornac (crater)
- Chad
- Chad Trujillo
- Chadwick (crater)
- Chafe (crater)
- Chaffee (crater)
- Chaikovskij (crater)
- Chained Girls
- Chained for Life
- Chairman of the Indian Space Research Organisation
- Chaitra
- Chakkamkulangara Siva Temple
- Chakrulo
- Chalce Montes
- Chaldene
- Chalice (superhero character)
- Challenge ProMode Arena
- Challenger (1990 film)
- Challenger (train)
- Challenger Center for Space Science Education
- Challenger Colles
- Challenger Deep
- Challenger Society for Marine Science
- Challenger flag
- Challenger: The Final Flight
- Challis (crater)
- Chalonge (crater)
- Cham calendar
- Chamaeleon
- Chamaeleon complex
- Chamaeleon in Chinese astronomy
- Chamberlin (lunar crater)
- Chamberlin trimetric projection
- Chamberlin–Moulton planetesimal hypothesis
- Chambliss Amateur Achievement Award
- Chambliss Astronomical Writing Award
- Chambord meteorite
- Chameleon (The Twilight Zone)
- Chameleon particle
- Champagne Supernova
- Champagne flow model
- Champion (train)
- Champion Oil Field
- Champollion (crater)
- Champollion (spacecraft)
- Chancey Juday
- Chand Par Chadayee
- Chanda Jog
- Chanda Prescod-Weinstein
- Chandler (crater)
- Chandra
- Chandra Deep Field South
- Chandra Wickramasinghe
- Chandra X-ray Observatory
- Chandramauli Upadhyay
- Chandrasekhar limit
- Chandrasekhar number
- Chandrasekhar polarization
- Chandrasekhar potential energy tensor
- Chandrasekhar virial equations
- Chandrasekhar's variational principle
- Chandrasekhar's white dwarf equation
- Chandrasekhar–Kendall function
- Chandrasekhar–Page equations
- Chandrashekhar J. Joshi
- Chandravakyas
- Chandrayaan programme
- Chandrayaan-1
- Chandrayaan-2
- Chandrayaan-3
- Chang Heng (crater)
- Chang Kee Jung
- Chang'e
- Chang'e 1
- Chang'e 2
- Chang'e 3
- Chang'e 4
- Chang'e 5
- Chang'e 5-T1
- Chang'e 6
- Chang'e 7
- Change Your Mind (Steven Universe)
- Changxi
- Chang–Refsdal lens
- Channel (geography)
- Channel River
- Channel pattern
- Channel types
- Chanquillo
- Chant (crater)
- Chantrey Inlet
- Chan–Paton factor
- Chao Meng-Fu (crater)
- Chaochuan Formation
- Chaoite
- Chaos (cosmogony)
- Chaos Canyon
- Chaos Walking (film)
- Chaos de Montpellier-le-Vieux
- Chaos on Deponia
- Chaos terrain
- Chaotic rotation
- Chapais (crater)
- Chaplygin (crater)
- Chaplygin gas
- Chapman (crater)
- Chapman Medal
- Chappe (crater)
- Chappell (crater)
- Chapter 10: The Passenger
- Chapter 11: The Heiress
- Chapter 12: The Siege
- Chapter 13: The Jedi
- Chapter 14: The Tragedy
- Chapter 15: The Believer
- Chapter 1: The Mandalorian
- Chapter 24
- Chapter 2: The Child
- Chapter 3: The Sin
- Chapter 4: Sanctuary
- Chapter 5: The Gunslinger
- Chapter 6: The Prisoner
- Chapter 7: The Reckoning
- Chapter 8: Redemption
- Chapter 9: The Marshal
- Chapter Sixty-One: Halloween
- Chapterhouse: Dune
- Characteristic energy
- Characteristic velocity
- Charge Composition Explorer
- Charge modulation spectroscopy
- Charge-coupled device
- Charged Particle Lunar Environment Experiment
- Charged-device model
- Chargino
- Chariot (Chinese constellation)
- Chariots of the Gods (film)
- Chariots of the Gods?
- Charitum Montes
- Charity Shoal crater
- Charles A. Beichman
- Charles Adams (seismologist)
- Charles Alexander Shain
- Charles Arden-Clarke
- Charles Augustus Young
- Charles Babbage
- Charles Band
- Charles Bartley
- Charles Bassett
- Charles Binger
- Charles Bolden
- Charles Bruce Stephenson
- Charles C. Steidel
- Charles Camarda
- Charles Czeisler
- Charles D. Gemar
- Charles D. Walker
- Charles Darwin
- Charles Dillon Perrine
- Charles Doolittle Walcott Medal
- Charles Duke
- Charles E. Brady Jr.
- Charles Eastlake Smith
- Charles Edward Barns
- Charles Edward St. John
- Charles Egerton (Indian Army officer)
- Charles Elachi
- Charles Elmer
- Charles Emile Stuyvaert
- Charles Gifford (astronomer)
- Charles Glover Barkla
- Charles Greeley Abbot
- Charles Green (astronomer)
- Charles H. Holbrow
- Charles H. Townes
- Charles Hailey
- Charles Henry Parkhurst
- Charles Hugh Smiley
- Charles Igwe Arizechukwu
- Charles J. Donlan
- Charles J. Precourt
- Charles Jacquinot
- Charles Jasper Joly
- Charles Jean-Pierre Lallemand
- Charles K. Johnson
- Charles Kay Ogden
- Charles Kohlhase
- Charles L. Bennett
- Charles L. Veach
- Charles Lane Poor
- Charles Lethbridge Kingsford
- Charles Malapert
- Charles Medhurst
- Charles Messier
- Charles N. Brown
- Charles O. Hobaugh
- Charles P. de Saint-Aignan
- Charles Piazzi Smyth
- Charles Platt (author)
- Charles Pollard Olivier
- Charles Pritchard
- Charles Pym (Conservative politician)
- Charles R. Alcock
- Charles R. Bentley
- Charles Rabot
- Charles Richards (NASA engineer)
- Charles S. Cockell
- Charles S. Venable
- Charles Schneeman
- Charles Schnetzler
- Charles Schuchert Award
- Charles Sherman (artist)
- Charles Simonyi
- Charles Skinner (geologist)
- Charles Stokes (collector)
- Charles Stuart Bowyer
- Charles T. Kowal
- Charles Todd (pioneer)
- Charles Vélain
- Charles W. Juels
- Charles W. Misner
- Charles Wheatstone
- Charles Whyte
- Charles Wilkes
- Charles William Adams (surveyor)
- Charles William Barkley
- Charles Wylie (astronomer)
- Charles Yerkes
- Charles de Lint
- Charlevoix crater
- Charley Aylett
- Charley Lippincott
- Charlie Atom
- Charlie Had One But He Didn't Like It, So He Gave It To Us
- Charlie Rose
- Charlie Spivak
- Charlie and the Great Glass Elevator
- Charlier (Martian crater)
- Charlier (lunar crater)
- Charlotte (TV series)
- Charlottetown (soil series)
- Charon (moon)
- Charpai
- Chart Rulership
- Chart datum
- Chas Chandler
- Chaser (video game)
- Chasing the Moon (2019 film)
- Chasles' theorem (gravitation)
- Chasm City
- Chasma
- Chasma Boreale
- Chasqui I
- Chassigny (meteorite)
- Chatla
- Chatter mark
- Chaturdashi
- Chaturthi
- Chaucer (crater)
- Chauvenet (crater)
- Chaxiraxi
- CheMin
- Chebyshev (crater)
- Check It Out! with Dr. Steve Brule
- Check dam
- Cheerleaders Beach Party
- Chef & Brewer
- Cheick Modibo Diarra
- Chekhov (crater)
- Chelativorans composti
- Chelmos Observatory
- Chelsea Handler
- Chelsea Potter
- Chelyabinsk meteor
- Chelyabinsk meteorite
- ChemXSeer
- Chemical cycling
- Chemical imaging
- Chemical oxygen demand
- Chemical oxygen generator
- Chemical purity
- Chemical safety assessment
- Chemical shift
- Chemical transport model
- Chemical vapor deposition
- Chemical waste
- Chemically inert
- Chemically peculiar star
- Chemiluminescence
- Chemistry and Camera complex
- Chemistry of wetland dredging
- Chemosphere (journal)
- Chemosynthesis
- Chen Dong (astronaut)
- Chen Jin Lang
- Chen Quan
- Cheomseongdae
- Cheonsang Yeolchabunyajido
- Cher Ng
- Cherenkov Array at Themis
- Cherenkov Telescope Array
- Chergach
- Chernobog
- Chernobyl groundwater contamination
- Chernozem
- Chernyshev (crater)
- Chern–Simons form
- Cherokee spiritual beliefs
- Cherry Springs State Park
- Cherry bomb
- Cheryl Morgan
- Chesapeake Bay Interpretive Buoy System
- Chesapeake Bay impact crater
- Chesed
- Chesley Bonestell
- Chester Burleigh Watts
- Chester Lyman
- Chesterton (crater)
- Chesty Morgan (band)
- Chevallier (crater)
- Chevron (land form)
- Chevy Chase
- Chewbacca
- Chez Ami Supper Club
- Chez Ntemba
- Chi Andromedae
- Chi Aquarii
- Chi Aquilae
- Chi Aurigae
- Chi Boötis
- Chi Cancri
- Chi Capricorni
- Chi Carinae
- Chi Cassiopeiae
- Chi Centauri
- Chi Ceti
- Chi Cygni
- Chi Draconis
- Chi Eridani
- Chi Geminorum
- Chi Herculis
- Chi Hydrae
- Chi Leonis
- Chi Lupi
- Chi Ophiuchi
- Chi Orionis
- Chi Pegasi
- Chi Persei
- Chi Piscium
- Chi Puppis
- Chi Sagittarii
- Chi Scorpii
- Chi Serpentis
- Chi Tauri
- Chi Ursae Majoris
- Chi Virginis
- Chi Virginis b
- Chi and Me
- Chi-Won Yoon
- Chi1 Hydrae
- Chi1 Orionis
- Chi1 Sagittarii
- Chi2 Hydrae
- Chi2 Orionis
- Chi3 Sagittarii
- Chiaki Mukai
- Chiang K'ui (crater)
- Chiang Mai Night Bazaar
- Chiara Mingarelli
- Chibiusa
- Chicago Air Shower Array
- Chicago City Limits
- Chicago Limited (NYC train)
- Chicago Night Express
- Chicago Pile-1
- Chicago Pile-3
- Chicago Pile-5
- Chicago Theatre
- Chichen Itza
- Chickasaw meridian
- Chico Community Observatory
- Chicomecōātl
- Chicxulub crater
- Chicxulub impactor
- Chief (train)
- Chief of Space Operations
- Chief of the Astronaut Office
- Chiemgau impact hypothesis
- Chikyū
- Chilakamarthi Prabhakar Chakravarthy Sharma
- Chilam Balam
- Chilbolton Observatory
- Chilca Launch Range
- Child Museum (Cairo)
- Childhood's End
- Childhood's End (Pink Floyd song)
- Childhood's End (miniseries)
- Children Shouldn't Play with Dead Things
- Children of Dune
- Children of God (novel)
- Children of Time (Star Trek: Deep Space Nine)
- Children of Time (novel)
- Children of a Dead Earth
- Children of the Gods
- Children of the Lens (novel)
- Children of the Night (1991 film)
- Children of the Whales
- Children's Environmental Exposure Research Study
- Childrens Hospital
- Chilonatalus
- Chimborazo
- Chimera (spacecraft)
- China Academy of Launch Vehicle Technology
- China Academy of Space Technology
- China Aerodynamics Research and Development Center
- China Aerospace Science and Industry Corporation
- China Aerospace Science and Technology Corporation
- China Carbon Forum
- China Chang Feng
- China Dark Matter Experiment
- China Fusion Engineering Test Reactor
- China Geological Survey
- China Manned Space Engineering Office
- China Miéville
- China National Space Administration
- China Pollution Map Database
- China exclusion policy of NASA
- China's spaceplane program
- China, IL
- ChinaSat 10
- ChinaSat 12
- ChinaSat 9
- ChinaSat 9A
- Chinasat
- Chinatown, Vancouver
- China–Brazil Earth Resources Satellite program
- Chincoteague (crater)
- Chinese Deep Space Network
- Chinese Docking Mechanism
- Chinese Future Giant Telescope
- Chinese Giant Solar Telescope
- Chinese Lunar Exploration Program
- Chinese New Year's Eve
- Chinese Society of Astronautics
- Chinese astrology
- Chinese astronomy
- Chinese constellations
- Chinese creation myths
- Chinese fireworks
- Chinese large modular space station
- Chinese names in space
- Chinese reusable experimental spacecraft
- Chinese space program
- Chinese spirit possession
- Chinese star maps
- Chinese star names
- Chinese women in space
- Chinese zodiac
- Ching-Te (crater)
- Chinga meteorite
- Chinguetti meteorite
- Chinigchinix
- Chip E.
- Chirality (chemistry)
- Chiron (hypothetical moon)
- Chiron-type comet
- Chiroptonyssus
- Chirp mass
- Chitinozoan
- Chiyli crater
- Chladni (crater)
- Chloracidobacterium
- Chloracne
- Chloral betaine
- Chloral hydrate
- Chloralodol
- Chloride-bearing deposits on Mars
- Chlorine gas poisoning
- Chlorobutanol
- Chloroflexus aggregans
- Chlorophenol red
- Chlorotrifluorosilane
- Chloryl fluoride
- Chocolate bomb
- Choctaw Rocket
- Choctaw meridian
- Choctaw mythology
- Chofu Aerospace Center
- Choghadiya
- Choir wall of Chartres Cathedral
- Choke Canyon
- Cholinergic crisis
- Chollian
- Chondrite
- Chondritic uniform reservoir
- Chondrule
- Chongqing Science and Technology Museum
- Chonide orogeny
- Chooz (experiment)
- Chopin (crater)
- Chopper Chicks in Zombietown
- Choquequirao
- Chord (astronomy)
- Chorography
- Chorology
- Chriet Titulaer
- Chris Achilleos
- Chris Baker (artist)
- Chris Carter (screenwriter)
- Chris Chapman (seismologist)
- Chris Cowie
- Chris Cox (DJ)
- Chris Elliott
- Chris Fortier
- Chris Foss
- Chris Freeman (scientist)
- Chris Hadfield
- Chris Hardwick
- Chris Hirata
- Chris Impey
- Chris Kemp
- Chris Lake
- Chris Leck
- Chris Lintott
- Chris Malinchak
- Chris Moore (illustrator)
- Chris Noth
- Chris Paciello
- Chris Pancratz
- Chris Rapley
- Chris Roberts (video game developer)
- Chris Rush
- Chris Spencer (actor)
- Chris Tinney
- Chris Turney
- Chris Willrich
- Christ Community Church
- Christa McAuliffe
- Christa McAuliffe Space Education Center
- Christen Sørensen Longomontanus
- Christer Fuglesang
- Christfried Kirch
- Christiaan Huygens
- Christiaan Huygens Medal
- Christian Astrology
- Christian August Friedrich Peters
- Christian Calson
- Christian Doppler
- Christian Guilleminault
- Christian Gärtner
- Christian Heinrich Friedrich Peters
- Christian Horrebow
- Christian Ludwig Gerling
- Christian Ludwig Ideler
- Christian Mayer (astronomer)
- Christian Pollas
- Christian T. Elvey
- Christian Topography
- Christian Wurstisen
- Christian of Prachatice
- Christian views on environmentalism
- Christiane Bonnelle
- Christina Hulbe
- Christina Koch
- Christina Richey
- Christina Riesselman
- Christine Darden
- Christine Jones Forman
- Christine Kirch
- Christine Lane
- Christine Siddoway
- Christine Wilson (scientist)
- Christmas Icetastrophe
- Christmas on Mars
- Christmas on the International Space Station
- Christoffel symbols
- Christoffer Schander
- Christofilos effect
- Christoforo Borri
- Christoph Arnold
- Christoph Grienberger
- Christoph Rothmann
- Christoph Scheiner
- Christoph Sutter
- Christopher Aikman
- Christopher Anne Suczek
- Christopher Blair
- Christopher C. Kraft Jr.
- Christopher Cassidy
- Christopher Chyba
- Christopher Clavius
- Christopher Conselice
- Christopher E. Gerty
- Christopher Ferguson
- Christopher Glein
- Christopher Hansteen
- Christopher Kochanek
- Christopher Lawrence (DJ)
- Christopher Lee
- Christopher McKay
- Christopher McKee
- Christopher Nolan
- Christopher Paolini
- Christopher Scolese
- Christopher Shy
- Christopher Wanjek
- Christopher Whall
- Christopher Wren
- Chrome (video game)
- Chrome and Hot Leather
- Chromism
- Chromosphere
- Chromo–Weibel instability
- Chronic toxicity
- Chronobiology
- Chronobiotic
- Chronocinematograph
- Chronology of Pakistan's rocket tests
- Chronology of discoveries of water on Mars
- Chronology of the universe
- Chronology protection conjecture
- Chronon
- Chronosequence
- Chronostratigraphy
- Chronotherapy (sleep phase)
- Chronotherapy (treatment scheduling)
- Chronotype
- Chronozone
- Chroococcidiopsis
- Chrysalis (Star Trek: Deep Space Nine)
- Chryse Alien
- Chryse Planitia
- Chryseobacterium frigidisoli
- Chryseobacterium haifense
- Chryseobacterium oranimense
- Chryseobacterium solincola
- Chrysler SERV
- Chrysoine resorcinol
- Chryssa Kouveliotou
- Chrétien (crater)
- Chthonian planet
- Chu Silk Manuscript
- Chu Ta (crater)
- Chuck E. Cheese in the Galaxy 5000
- Chuckie (DJ)
- Chuhuiv Observational Station
- Chukcha crater
- Churchill Rocket Research Range
- Chuseok
- Chushiro Hayashi
- Chute (gravity)
- Château de Meudon
- Ché OVNI
- Chézy formula
- Chía (goddess)
- Chōzubachi
- Chōzuya
- Chŏng Ch'ŏl (crater)
- Ciaphas Cain
- Cibola Burn
- Ciccaba
- Cichus (crater)
- Cid (soil)
- Cider house
- Cidoxepin
- Ciel Satellite Group
- Ciel-2
- CieloBuio
- Cilix (crater)
- Cima Ekar Observing Station
- Cimarron meridian
- Cimon (robot)
- Cinazepam
- Cincinnati Limited
- Cincinnati Observatory
- Cincinnati Street Gas Lamps
- Cinco (crater)
- Cinder (novel)
- Cine Rex
- Cine TAM
- CineStar IMAX Lahore
- CineVista Theatres
- Cinefamily
- Cinema 16
- Cinema Insomnia
- Cinema Rex fire
- Cinema Vox (Casablanca)
- Cinema da Boca do Lixo
- Cinema etiquette
- Cinemas in Portland, Oregon
- Cinemateca Uruguaya
- Cinematheque
- Cinerama Dome
- Cinereous owl
- Cinesphere
- Cinex
- Cinnabar boobook
- Cinnamon basil
- Cinnamon screech owl
- Cinolazepam
- Cinzia Verde
- Circadian clock
- Circadian rhythm
- Circadian rhythm sleep disorder
- Circasemidian rhythm
- Circaseptan
- Circinus
- Circinus Galaxy
- Circinus X-1
- Circinus in Chinese astronomy
- Circle (TV series)
- Circle of equal altitude
- Circle of latitude
- Circle-Vision 360°
- Circular dichroism
- Circular orbit
- Circular polarization
- CircumArctic Rangifer Monitoring and Assessment Network
- Circumbinary planet
- Circumlunar trajectory
- Circumnavigation world record progression
- Circumplanetary disk
- Circumpolar constellation
- Circumpolar distribution
- Circumpolar star
- Circumstellar disc
- Circumstellar dust
- Circumstellar envelope
- Circumstellar habitable zone
- Circus Tavern, Manchester
- Cirque
- Cirque du Bout du Monde
- Cirque glacier
- Cirque stairway
- Cirrus (rocket)
- Cirrus Minor (song)
- Cirrus cloud thinning
- Cis-Neptunian object
- Cisco TelePresence
- Cislunar Explorers
- Cissonius
- Cistugo
- Citcom
- Cities of the Underworld
- Citizen (app)
- Citizens Against UFO Secrecy
- Citizens Convention for Climate
- Citizens for Public Justice
- Citizens' Advisory Council on National Space Policy
- Cittie of Yorke
- City (journal)
- City Limits (TV series)
- City Night Line
- City at World's End
- City of Arts and Sciences
- City of Erie v. Pap's A. M.
- City of Illusions
- City of Los Angeles (train)
- City of Miami (train)
- City of New Orleans (train)
- City of Perth Skyworks
- City of Portland (train)
- City of San Francisco (train)
- City of Sorcery
- City of St. Louis (train)
- City of the Chasch
- City on the Moon
- CityNightLine
- CitySurf Globe
- Cité de l'espace
- Cité des Sciences et de l'Industrie
- Ciuacoatl Mons
- Civic Planetarium of Lecco
- Civil time
- Civilian Saucer Intelligence
- Civilian Space eXploration Team
- Civilization II
- Civilization II: Test of Time
- Civilization III
- Civilization IV
- Civilization IV: Beyond the Sword
- Civilization Revolution
- Civilization Revolution 2
- Civilization: Beyond Earth
- Civilization: Beyond Earth – Rising Tide
- Ciénega
- Clabon Allen
- Claerwen Fault
- Claes-Ingvar Lagerkvist
- Claimed moons of Earth
- Clairaut (crater)
- Clairaut's theorem
- Claire Armstrong
- Claire Ellen Max
- Claire Horwell
- Claire Parkinson
- Clangers
- Clans of the Alphane Moon
- Claptrap
- Clara (film)
- Clare Burrage
- Clare Francis
- Clare Parnell
- Clarence Chant
- Clarence N. Hickman
- Clarence Syvertson
- Clarence T. Jones Observatory
- Clarion (company)
- Claritas Fossae
- Claritas Rupes
- Clark (Martian crater)
- Clark (lunar crater)
- Clark Chapman
- Clark Planetarium
- Clarke Medal
- Clarke number
- Class of 1984
- Classic Star Wars
- Classical Cepheid variable
- Classical compass winds
- Classical diffusion
- Classical element
- Classical elements in popular culture
- Classical planet
- Classification of electromagnetic fields
- Classification of non-silicate minerals
- Classification of silicate minerals
- Classification of sleep disorders
- Clastic wedge
- Clathrate hydrate
- Claude Jaupart
- Claude Lorius
- Claude Nicollier
- Claude R. Canizares
- Claudia (crater)
- Claudia Alexander
- Claudia Cazacu
- Claudia Letizia
- Claudia Maraston
- Claudia de Rham
- Claudie Haigneré
- Claudine Rinner
- Claudio Casacci
- Claudio Maccone
- Claudio Stampi
- Clausius (crater)
- Clavibacter michiganensis
- Clavius (crater)
- Clavius Base
- Clawful
- Claxton meteorite
- Clay
- Clay (short story)
- Clay cutan
- Clay mineral
- Clay-with-Flints
- Claymation Comedy of Horrors
- Claypan
- Clayton Anderson
- Clayton Lake State Park
- Clean Air Society of Australia and New Zealand
- CleanSeaNet
- Cleaning event
- Clear Sky Chart
- ClearSpace-1
- Clearcut (film)
- Clearing the neighbourhood
- Clearwater Lakes
- Clebsch representation
- Cleinias of Tarentum
- Clementine (spacecraft)
- Cleo Loi
- Cleomedes (crater)
- Cleon Lacefield
- Cleopatra (crater)
- Cleopatra Jones
- Cleopatra Jones and the Casino of Gold
- Cleostratus (crater)
- Clerke (crater)
- Clerkenwell cinema fire
- Cleveland Abbe
- Cleveland Museum of Natural History
- Cleveland Night Express
- Click (2006 film)
- Clickworkers
- Cliff
- Cliff-former
- Cliff-top dune
- Cliffed coast
- Clifford Cunningham
- Clifford E. Charlesworth
- Clifford Martin Will
- Clifford Stoll
- Clifford W. Holmes Award
- Clifton Williams
- Clifton–Pohl torus
- Climacteric year
- Climate
- Climate Change Performance Index
- Climate Change TV
- Climate Dynamics
- Climate Emergency in the United Kingdom
- Climate Forecast Applications Network
- Climate Policy (journal)
- Climate Research (journal)
- Climate Solutions Road Tour
- Climate and Development
- Climate change mitigation
- Climate engineering
- Climate ethics
- Climate gap
- Climate inertia
- Climate justice
- Climate model
- Climate of Pluto
- Climate of Titan
- Climate of Uranus
- Climate of ancient Rome
- Climate of the Arctic
- Climate of the Past
- Climate restoration
- Climate system
- Climate variability and change
- Climate-Alliance Germany
- Climateprediction.net
- Climatic Change (journal)
- Climatic Research Unit
- Climatic geomorphology
- Climatology
- Climax community
- Climax species
- Clime
- Cline (hydrology)
- Clinical sleep educator
- Clinophilia
- Clinton A. J. Duffy
- Clinton B. Ford
- Clinton-Sherman Industrial Airpark
- Clip (film)
- Clipper Schooner
- Clive Phillipps-Wolley
- Clive Ruggles
- Cloak of Deception
- Clocental
- Clock drift
- Clockwork universe
- Clohessy–Wiltshire equations
- Clomethiazole
- Clone Wars (Star Wars)
- Clone Wars Adventures
- Clonycavan Man
- Clorazepate
- Close encounter
- Close to Critical
- Close-out (aerospace)
- Closed ecological system
- Closed timelike curve
- Clostridium algoriphilum
- Closure (atmospheric science)
- Closure phase
- Cloud Aerosol Transport System
- Cloud albedo
- Cloud drop effective radius
- Cloud fraction
- Cloud's Rider
- Cloud-forest screech owl
- CloudSat
- Cloudcroft Observatory
- Clouds Across the Moon
- Clouds and the Earth's Radiant Energy System
- Clover (detector)
- Clover (telescope)
- Cloverleaf quasar
- Clowes–Campusano LQG
- Club Cumming
- Club Drive
- Club Filter Melbourne
- Club Foot (song)
- Club Glow
- Club Kids
- Club RaYé
- Club Saint-Germain
- Club Space
- Club Wild
- Club Zanzibar
- Club drug
- Club of Rome
- Clubbing (subculture)
- Clubs Are Trump
- Clumping factor
- Cluster (spacecraft)
- Cluster II (spacecraft)
- Cluster Lensing and Supernova survey with Hubble
- Cluster One
- Clutter (radar)
- Clutter folding
- Clyde Foster
- Clyde Tombaugh
- Clärenore Stinnes
- Clémentine (satellite)
- Co-location (satellite)
- Co-orbital configuration
- Co-sleeping
- CoDominium
- CoGeNT
- CoKu Tau/4
- CoRoT
- CoRoT-1
- CoRoT-10b
- CoRoT-11b
- CoRoT-12b
- CoRoT-13b
- CoRoT-14b
- CoRoT-15b
- CoRoT-16b
- CoRoT-17b
- CoRoT-18b
- CoRoT-19b
- CoRoT-1b
- CoRoT-2
- CoRoT-20b
- CoRoT-20c
- CoRoT-21b
- CoRoT-22b
- CoRoT-23b
- CoRoT-2b
- CoRoT-3
- CoRoT-3b
- CoRoT-4
- CoRoT-4b
- CoRoT-5
- CoRoT-5b
- CoRoT-6
- CoRoT-6b
- CoRoT-7
- CoRoT-7b
- CoRoT-7c
- CoRoT-7d
- CoRoT-8b
- CoRoT-9b
- Coachmakers Arms, Hammersmith
- Coahuila meteorite
- Coal Hole, Strand
- Coal slurry
- Coalition for Deep Space Exploration
- Coalsack Nebula
- Coast
- Coast Starlight
- Coastal Batholith of Peru
- Coastal Batholith of central Chile
- Coastal Cliff of northern Chile
- Coastal development hazards
- Coastal erosion
- Coastal flooding
- Coastal geography
- Coastal management
- Coastal meadow
- Coastal morphodynamics
- Coastal reservoir
- Coastal sediment supply
- Coastal sediment transport
- Coastal zone color scanner
- Coastline (sculpture)
- Coastline paradox
- Coat of arms and flag of Transylvania
- Coat of arms of Aarhus
- Coat of arms of Adygea
- Coat of arms of Alba Iulia
- Coat of arms of Algiers
- Coat of arms of Antigua and Barbuda
- Coat of arms of Argentina
- Coat of arms of Australia
- Coat of arms of Bolivia
- Coat of arms of Bonaire
- Coat of arms of Bosnia and Herzegovina
- Coat of arms of Brazil
- Coat of arms of Brisbane
- Coat of arms of British Columbia
- Coat of arms of Buenos Aires Province
- Coat of arms of Calgary
- Coat of arms of Cameroon
- Coat of arms of Chad
- Coat of arms of Chile
- Coat of arms of Copenhagen
- Coat of arms of Costa Rica
- Coat of arms of Crimea
- Coat of arms of Croatia
- Coat of arms of Cuba
- Coat of arms of Dagestan
- Coat of arms of Darwin
- Coat of arms of Deva, Romania
- Coat of arms of East Timor
- Coat of arms of Ecuador
- Coat of arms of Edmonton
- Coat of arms of Focșani
- Coat of arms of French Polynesia
- Coat of arms of Ghana
- Coat of arms of Guadeloupe
- Coat of arms of Haarlem
- Coat of arms of Hamburg
- Coat of arms of Hobart
- Coat of arms of Ingushetia
- Coat of arms of Ivory Coast
- Coat of arms of Kiribati
- Coat of arms of Klaipėda
- Coat of arms of La Guajira Department
- Coat of arms of Lancaster University
- Coat of arms of Latvia
- Coat of arms of Leeds
- Coat of arms of Liberia
- Coat of arms of Libya
- Coat of arms of Maastricht
- Coat of arms of Madrid
- Coat of arms of Magdalena Department
- Coat of arms of Malacca
- Coat of arms of Malawi
- Coat of arms of Mali
- Coat of arms of Mauritius
- Coat of arms of Moldova
- Coat of arms of Morocco
- Coat of arms of Namibia
- Coat of arms of Nauru
- Coat of arms of Netherlands New Guinea
- Coat of arms of New South Wales
- Coat of arms of New York
- Coat of arms of New Zealand
- Coat of arms of Niger
- Coat of arms of Norfolk Island
- Coat of arms of North Dakota
- Coat of arms of Northern Ireland
- Coat of arms of Nunavut
- Coat of arms of Panama
- Coat of arms of Paraguay
- Coat of arms of Perm
- Coat of arms of Poltava Oblast
- Coat of arms of Pope Francis
- Coat of arms of Poznań
- Coat of arms of Risør
- Coat of arms of Romania
- Coat of arms of Samoa
- Coat of arms of Sarawak
- Coat of arms of Senegal
- Coat of arms of Sevastopol
- Coat of arms of Singapore
- Coat of arms of Sint Maarten
- Coat of arms of Slovenia
- Coat of arms of Solomon Islands
- Coat of arms of Somalia
- Coat of arms of South Georgia and the South Sandwich Islands
- Coat of arms of Stellaland
- Coat of arms of Suriname
- Coat of arms of Sweden
- Coat of arms of Sydney
- Coat of arms of São Tomé and Príncipe
- Coat of arms of Texas
- Coat of arms of Thuringia
- Coat of arms of Timișoara
- Coat of arms of Tonga
- Coat of arms of Transnistria
- Coat of arms of Tunisia
- Coat of arms of Uganda
- Coat of arms of Ulcinj
- Coat of arms of Uruguay
- Coat of arms of Vardø
- Coat of arms of Victoria (Australia)
- Coat of arms of West Yorkshire
- Coat of arms of Western Sahara
- Coat of arms of Winnipeg
- Coat of arms of Zagreb
- Coat of arms of Zimbabwe
- Coat of arms of the Azores
- Coat of arms of the BBC
- Coat of arms of the Bahamas
- Coat of arms of the British Indian Ocean Territory
- Coat of arms of the Cayman Islands
- Coat of arms of the Central African Republic
- Coat of arms of the Collectivity of Saint Martin
- Coat of arms of the Community of Madrid
- Coat of arms of the Cook Islands
- Coat of arms of the Drapers Company
- Coat of arms of the Federation of Bosnia and Herzegovina
- Coat of arms of the Federation of Rhodesia and Nyasaland
- Coat of arms of the Kurdistan Region
- Coat of arms of the London Borough of Haringey
- Coat of arms of the London Borough of Hillingdon
- Coat of arms of the Netherlands Antilles
- Coat of arms of the Ottoman Empire
- Coat of arms of the Philippines
- Coat of arms of the Republic of Bashkortostan
- Coat of arms of the Republic of Karelia
- Coat of arms of the Royal Borough of Greenwich
- Coat of arms of the Székelys
- Coat of arms of the Tuva Republic
- Coat of arms of the Washington family
- Coatlicue (star)
- Coats Observatory
- Cobb–Eickelberg Seamount chain
- Coblentz (Martian crater)
- Coblentz (lunar crater)
- Coblentz Society
- Cobra (manga)
- Coburn (band)
- Cochise (crater)
- Cocidius
- Cockcroft (crater)
- Cockcroft Institute
- Cockercombe tuff
- Cocoon (club)
- Cocoricò (nightclub)
- Code of the Lifemaker
- Coded aperture
- Codex Borbonicus
- Codex Borgia
- Codex Fejérváry-Mayer
- Codex Mexicanus
- Codex Ríos
- Codex Telleriano-Remensis
- Codex: Imperial Guard
- Coesite
- Coeurl
- Coffee River Cave
- Coffin Joe
- Coffy
- Cognitive behavioral therapy for insomnia
- Cognitive geography
- Cognitive neuroscience of dreams
- Cognized environment
- Cohenite
- Coherence (film)
- Coherence scanning interferometry
- Coherence theory (optics)
- Coherent Raman scattering microscopy
- Coherent anti-Stokes Raman spectroscopy
- Coherent diffraction imaging
- Coherent electromagnetic radio tomography
- Coherent spectroscopy
- Cohocksink Creek
- Cohoquinoque Creek
- Coihaique Group
- Coilgun
- Cointe Observatory
- Col
- Colaba Observatory
- Colangüil Batholith
- Colatitude
- Colcannon
- Cold Atom Laboratory
- Cold Big Bang
- Cold Blank
- Cold Front (Star Trek: Enterprise)
- Cold Fusion (novel)
- Cold Hands, Warm Heart
- Cold Warriors
- Cold as Ice (novel)
- Cold camera photography
- Cold cathode
- Cold dark matter
- Cold gas thruster
- Cold quasar
- Cold seep
- Cold trap
- Cold trap (astronomy)
- Cold vapour atomic fluorescence spectroscopy
- Cold-water geyser
- Colectiv nightclub fire
- Coleman–Mandula theorem
- Coleridge (crater)
- Coleta de Dados Colles
- Colette Heald
- Colicin
- Coliform index
- Colima pygmy owl
- Colin Curtis (DJ)
- Colin Faver
- Colin Franklin (engineer)
- Colin Hayter Crick
- Colin Morgan
- Colin Pillinger
- Colin Pittendrigh
- Colin Ronan
- Colin Stanley Gum
- Colin Thubron
- Colin Trevorrow
- Colin Wilson
- Coliseum Theatre (Washington Heights)
- Collaborative Computational Project Q
- Collage (geology)
- Collapsar
- CollectSPACE
- Colleen Cavanaugh
- Colleen Farrington
- Colleen Hartman
- College circuit
- Collider (film)
- Colliding beam fusion
- Colliding-wind binary
- Collimated beam
- Collin Roesler
- Collinder 135
- Collinder 140
- Collinder catalogue
- Collins (crater)
- Collins Observatory
- Collis (planetary nomenclature)
- Collision Earth
- Collision avoidance (spacecraft)
- Collision-induced absorption and emission
- Collisional excitation
- Collisional family
- Collocation (remote sensing)
- Colloid thruster
- Collurania-Teramo Observatory
- Colluvium
- Colocalization Benchmark Source
- Coloe Fossae
- Colombian Geological Survey
- Colombian Space Commission
- Colombo (crater)
- Colombo University Observatory
- Colonial (PRR train)
- Colonial American Astronomy
- Colonial Time Service Observatory
- Colonist (The X-Files)
- Colonization (series)
- Colonization of Europa
- Colonization of Mars
- Colonization of Titan
- Colonization of Venus
- Colonization of the Moon
- Colonization of the asteroids
- Colonization of the inner Solar System
- Colonization of the outer Solar System
- Colonization of trans-Neptunian objects
- Colonization resistance
- Colonization: Aftershocks
- Colonization: Down to Earth
- Colonization: Second Contact
- Colony (Grant novel)
- Colony (TV series)
- Colony (short story)
- Colony Wars
- Colony Wars: Red Sun
- Colony Wars: Vengeance
- Colony in Space
- Color Me Blood Red
- Color confinement
- Color in Chinese culture
- Color index
- Color index (geology)
- Color of water
- Color superconductivity
- Colorado Center for Astrodynamics Research
- Colorado Student Space Weather Experiment
- Colored dissolved organic matter
- Colored-particle-in-cell
- Colorimeter (chemistry)
- Colors of the day in Thailand
- Color–color diagram
- Color–flavor locking
- Colossus and the Crab
- Colossus of Nero
- Colossus of Rhodes
- Columba (constellation)
- Columba association
- Columba in Chinese astronomy
- Columbia Accident Investigation Board
- Columbia Hills (Mars)
- Columbia Mountains
- Columbia Non-neutral Torus
- Columbia Plateau
- Columbia: The Tragic Loss
- Columbian (MILW train)
- Columbus (ISS module)
- Columbus (crater)
- Columbus Control Centre
- Columbus Man-Tended Free Flyer
- Columbus – External Payload Facility
- Columnar jointing
- Colure
- Colwellia
- Colônia crater
- Coma (cometary)
- Coma Berenices
- Coma Berenices (dwarf galaxy)
- Coma Berenices in Chinese astronomy
- Coma Berenicids
- Coma Cluster
- Coma Filament
- Coma I
- Coma Star Cluster
- Coma Supercluster
- Coma cocktail
- Comas Sola (crater)
- Combat Mecha Xabungle
- Combat Rock (novel)
- Combat Shock
- Combinatorial mirror symmetry
- Combine (Half-Life)
- Combined Array for Research in Millimeter-wave Astronomy
- Combined sewer
- Combustion Integrated Rack
- Combustion tap-off cycle
- Come Back to Me (Ayreon song)
- Come Sail Away
- Comendite
- Comet
- Comet (book)
- Comet (experiment)
- Comet (film)
- Comet (pyrotechnics)
- Comet Arend–Roland
- Comet Bennett
- Comet Borrelly
- Comet Chasers
- Comet Crash
- Comet Donati
- Comet Encke
- Comet Galaxy
- Comet HLLV
- Comet Hale–Bopp
- Comet Holmes
- Comet Hopper
- Comet Howard–Koomen–Michels
- Comet Humason
- Comet Hyakutake
- Comet IRAS–Araki–Alcock
- Comet ISON
- Comet Ikeya–Seki
- Comet Interceptor
- Comet Kohoutek
- Comet Lulin
- Comet Machholz
- Comet Man
- Comet McNaught–Russell
- Comet Morehouse
- Comet NEOWISE
- Comet Nucleus Dust and Organics Return
- Comet Pereyra
- Comet Pojmański
- Comet Rendezvous Asteroid Flyby
- Comet Rendezvous, Sample Acquisition, Investigation, and Return
- Comet Shoemaker–Levy 9
- Comet Skjellerup–Maristany
- Comet Skorichenko–George
- Comet Stonehouse
- Comet Swift–Tuttle
- Comet West
- Comet White–Ortiz–Bolelli
- Comet Yi–SWAN
- Comet Zhu–Balam
- Comet de Vico
- Comet dust
- Comet in Moominland
- Comet in Moominland (film)
- Comet nucleus
- Comet of 1472
- Comet of 1729
- Comet seeker
- Comet tail
- Cometary knot
- Comets in fiction
- Comfortably Numb
- Comical History of the States and Empires of the Moon
- Comin' Home (Hum song)
- Coming Back to Life
- Comisión Nacional de Actividades Espaciales
- Comley limestone
- Command & Conquer: Yuri's Revenge
- Command missile
- Command module Columbia
- Commander Keen in Goodbye, Galaxy
- Commander Keen in Invasion of the Vorticons
- Commander Keen in Keen Dreams
- Commander Shepard
- Commander USA's Groovie Movies
- Commemorations of Benjamin Banneker
- Commensurability (astronomy)
- Commentariolus
- Commercial Crew Program
- Commercial Lunar Mission Support Services
- Commercial Lunar Payload Services
- Commercial Orbital Transportation Services
- Commercial Resupply Services
- Commercial Space Launch Act of 1984
- Commercial Space Launch Competitiveness Act of 2015
- Commercial Spaceflight Federation
- Commercial Standard Digital Bus
- Commercial Tavern
- Commercial astronaut
- Commercial use of space
- Commission for Dark Skies
- Commission for the Management and Application of Geoscience Information
- Commission on Maps and the Internet
- Committee on Earth Observation Satellites
- Committee on Space Research
- Common Berthing Mechanism
- Common Core Booster
- Common Law Cabin
- Common Law Wife (film)
- Common Missile
- Common Time
- Common envelope
- Common heritage of mankind
- Common modeling infrastructure
- Common squirrel monkey
- Common surface features of Mars
- Common traffic advisory frequency
- Common year starting on Friday
- Common year starting on Monday
- Common year starting on Saturday
- Common year starting on Sunday
- Common year starting on Thursday
- Common year starting on Tuesday
- Common year starting on Wednesday
- Common-path interferometer
- Commonwealth Bay
- Commonwealth Saga
- Commonwealth Star
- Communicating vessels
- Communication with extraterrestrial intelligence
- Communication-Centric Intelligence Satellite
- Communications Satellite Act of 1962
- Communications Technology Satellite
- Communications of the Lunar and Planetary Laboratory
- Communications satellite
- Communicative planning
- Communion (book)
- Community (ecology)
- Community Climate System Model
- Community Cyberinfrastructure for Advanced Microbial Ecology Research and Analysis
- Community Earth System Model
- Community Radiative Transfer Model
- Community Surface Dynamics Modeling System
- Community fingerprinting
- Community studies
- Commuter Husbands
- Comoving and proper distances
- Comoé National Park Research Station
- CompTox Chemicals Dashboard
- Compact Reconnaissance Imaging Spectrometer for Mars
- Compact Toroidal Hybrid
- Compact dimension
- Compact fluorescent lamp
- Compact intracloud discharge
- Compact star
- Compact toroid
- Compactification (physics)
- Compaction (geology)
- Compaction simulation
- Comparative Toxicogenomics Database
- Comparative Tracking Index
- Comparative planetary science
- Comparison of Asian national space programs
- Comparison of ICBMs
- Comparison of Star Trek and Star Wars
- Comparison of communication satellite operators
- Comparison of crewed space vehicles
- Comparison of embedded computer systems on board the Mars rovers
- Comparison of free off-line satellite navigation software
- Comparison of orbital launch systems
- Comparison of orbital launcher families
- Comparison of orbital rocket engines
- Comparison of photogrammetry software
- Comparison of remote sensing satellites
- Comparison of satellite buses
- Comparison of satellite navigation software
- Comparison of solid-fuelled orbital launch systems
- Comparison of space station cargo vehicles
- Compass (NASA)
- Compass rose
- Compass-1
- Compass-G1
- Compass-IGSO1
- Compassionate conservation
- Compatibility (geochemistry)
- Competition between Airbus and Boeing
- Complex (geology)
- Complex crater
- Complex response
- Complexometric indicator
- Composante Spatiale Optique
- Composite Binary Offset Carrier
- Composite chart
- Composite gravity
- Composition of Mars
- Compost
- Compressed air dryer
- Compressed fluid
- Compressed hydrogen
- Compression (geology)
- Compton (crater)
- Compton Gamma Ray Observatory
- Compton edge
- Compton scattering
- Compton telescope
- Compton–Belkovich Thorium Anomaly
- Compton–Getting effect
- Computation of radiowave attenuation in the atmosphere
- Computational Infrastructure for Geodynamics
- Computational astrophysics
- Computed tomography imaging spectrometer
- Computer Space
- Comrie (crater)
- Comstock (crater)
- Conaco
- Conamara Chaos
- Conan (dog)
- Conan (talk show)
- Conan O'Brien
- Conan O'Brien Can't Stop
- Conan O'Brien Needs a Friend
- Conan blimp
- Concentric crater fill
- Concentric spheres
- Concert Mayol
- Concession stand
- Concordant coastline
- Concordia Station
- Concurrent (Easter)
- Concurrent Design Facility
- CondoSat
- Condon (crater)
- Condor (Argentine missile)
- Condorcet (crater)
- Cone (crater)
- Cone Nebula
- Cone of depression
- ConeXpress
- Coneybury Henge
- Confederation of Indian Amateur Astronomers
- Conference of Latin Americanist Geographers
- Confessio Amantis
- Confidence and Paranoia
- Confined space
- Confluence
- Conformal Killing vector field
- Conformal anomaly
- Conformal antenna
- Conformal cyclic cosmology
- Conformal gravity
- Conformal map projection
- Conformal supergravity
- Conformastatic spacetimes
- Confusional arousals
- Congo red
- Congreve (crater)
- Congruence (general relativity)
- Conical hill
- Conifold
- Coniology
- Coniraya (crater)
- Conjunction (astronomy)
- Connaissance des Temps
- Connecticut Yankee (train)
- Connecting Slough
- Connolly Basin crater
- Connor Palace
- Conny Aerts
- Conny van Rietschoten
- Conon (crater)
- Conquering Worlds
- Conquest of Space
- Conrad Dasypodius
- Conrad Haas
- Conrad discontinuity
- Conroy Virtus
- Consell Observatory
- Conservation and restoration of insect specimens
- Conservation movement
- Conservation psychology
- Conservatory Water
- Consider Phlebas
- Constance Adams
- Constant routine protocol
- Constantijn Huygens Jr.
- Constantin Le Paige
- Constantinople Observatory of Taqi ad-Din
- Constellation
- Constellation Observing System for Meteorology, Ionosphere, and Climate
- Constellation family
- Constellation program
- Constellation-X Observatory
- Constructed wetland
- Construction of a complex null tetrad
- Consultative Committee for Space Data Systems
- Consumer fireworks
- Contact (1997 American film)
- Contact (novel)
- Contact (video game)
- Contact Conference
- Contact binary
- Contact binary (small Solar System body)
- Contact protection
- Contactee
- Contamination
- Contamination (film)
- Contents of the Voyager Golden Record
- Context Is for Kings
- Continent of stability
- Continent-ocean boundary
- Continental Biogeographic Region
- Continental crust
- Continental drift
- Continental margin
- Continental rise
- Continental shelf
- Continuous positive airway pressure
- Contour advection
- Contour line
- Contour plowing
- Contour trenching
- Contracted Bianchi identities
- Contribution to ARIEL Spectroscopy of Exoplanets
- Contributions to Mineralogy and Petrology
- Control moment gyroscope
- Controlled Experiment
- Controlled atmosphere
- Controlled ecological life-support system
- Controlled source electro-magnetic
- Controlled traffic farming
- Controller–pilot data link communications
- Controversy over the discovery of Haumea
- Convair C-131 Samaritan
- Convection
- Convection zone
- Convective overshoot
- Convective overturn
- Convention Relating to the Distribution of Programme-Carrying Signals Transmitted by Satellite
- Convention on Transit Trade of Land-locked States
- Conventional International Origin
- Conventional pollutant
- Convergence zone
- Conversion electron Mössbauer spectroscopy
- Conversion of Paul the Apostle
- Conviction (Star Wars novel)
- Cook (crater)
- Cool Breeze (film)
- Cool and the Crazy
- Cool tropics paradox
- Cooley High
- Coolidge Corner Theatre
- Cooling flow
- Cooling pond
- Cooma Mail
- Coonskin (film)
- Cooper (crater)
- Cooperative Institute for Climate Science
- Cooperative Institute for Meteorological Satellite Studies
- Cooperative Institute for Research in Environmental Sciences
- Cooperia (plant)
- Coordinate time
- Coordinated Universal Time
- Copaline
- Cope's gray treefrog
- Copeland Septet
- Copenhagen Suborbitals
- Copernican Revolution
- Copernican heliocentrism
- Copernican period
- Copernican principle
- Copernicium
- Copernicus (Martian crater)
- Copernicus (lunar crater)
- Copernicus Atmosphere Monitoring Service
- Copernicus Climate Change Service
- Copernicus Foundation for Polish Astronomy
- Copernicus Programme
- Copernicus Science Centre
- Cophasing
- Copland (crater)
- Copland Pass
- Copley (crater)
- Copper Breaks State Park
- Copper in heat exchangers
- Copperhead (Image Comics)
- Coppélia
- Coprates Chasma
- Coprates quadrangle
- Coprothermobacter platensis
- Coprothermobacter proteolyticus
- Coptic calendar
- Copyscope
- Coqui (NASA)
- Cor Caroli
- Cora G. Burwell
- Coral Reef Conservation Program
- Coral reef
- Corby (crater)
- Cordelia (moon)
- Cordell–Lorenz Observatory
- Cordillera Blanca Batholith
- Core sample
- Coreless planet
- Coreshine
- Core–mantle boundary
- Core–mantle differentiation
- Cori (lunar crater)
- Coricancha
- Corina Brussaard
- Corinne Manogue
- Coriolis (crater)
- Coriolis (satellite)
- Coriolis field
- Coriolis frequency
- Cormac Ó Ceallaigh
- Corn Ranch
- Corn on the Cop
- Cornbread, Earl and Me
- Cornelia C. Cameron
- Cornelia Lüdecke
- Cornelio Malvasia
- Cornelis Dirk Andriesse
- Cornelis Easton
- Cornelis Johannes van Houten
- Cornelis de Jager
- Cornelis de Jode
- Cornelius Gemma
- Cornelius Lanczos
- Cornell Mayer
- Cornell University Satellite
- Corona (planetary geology)
- Corona (satellite)
- Corona Australis
- Corona Australis in Chinese astronomy
- Corona Borealis
- Corona Borealis Supercluster
- Corona Borealis in Chinese astronomy
- Corona Zombies
- Corona discharge
- Corona ring
- Coronae Montes
- Coronal cloud
- Coronal hole
- Coronal loop
- Coronal mass ejection
- Coronal radiative losses
- Coronal rain
- Coronal seismology
- Coronet Cluster
- Corossol crater
- Corotation circle
- Corporal Clegg
- Corps of Topographs (Russian Empire)
- Corpse uncleanness
- Corpulent Stump
- Corpuscular theory of light
- Corrado Lamberti
- Corralitos Observatory
- Corrective Optics Space Telescope Axial Replacement
- Correlation function (astronomy)
- Corrosion in space
- Corsair (comics)
- Cort Aslakssøn
- Cortisol awakening response
- Coruscant Nights
- Corvalol
- Corvus (constellation)
- Corvus in Chinese astronomy
- Cory Doctorow
- Cos-B
- Cosener's House
- Cosimo Bambi
- Cosmic Anisotropy Polarization Mapper
- Cosmic Anisotropy Telescope
- Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
- Cosmic Background Explorer
- Cosmic Background Imager
- Cosmic Birth
- Cosmic Calendar
- Cosmic Call
- Cosmic Conflict
- Cosmic Dancer
- Cosmic Dawn Center
- Cosmic Evolution (book)
- Cosmic Evolution Survey
- Cosmic Explorer (gravitational wave observatory)
- Cosmic Girl (aircraft)
- Cosmic Girl (song)
- Cosmic Horseshoe
- Cosmic Hunt
- Cosmic Infrared Background ExpeRiment
- Cosmic Jackpot
- Cosmic Origins Spectrograph
- Cosmic Patrol
- Cosmic Radiation Satellite
- Cosmic Ray Energetics and Mass Experiment
- Cosmic Ray Subsystem
- Cosmic Research
- Cosmic Vision
- Cosmic Voyage (1936 film)
- Cosmic Wars
- Cosmic Zoom
- Cosmic age problem
- Cosmic ancestry
- Cosmic background radiation
- Cosmic censorship hypothesis
- Cosmic crystallography
- Cosmic distance ladder
- Cosmic dust
- Cosmic infrared background
- Cosmic latte
- Cosmic microwave background
- Cosmic neutrino background
- Cosmic noise
- Cosmic ocean
- Cosmic pluralism
- Cosmic ray
- Cosmic ray spallation
- Cosmic ray visual phenomena
- Cosmic string
- Cosmic time
- Cosmic variance
- Cosmic wind
- Cosmic-Ray Extremely Distributed Observatory
- Cosmic-ray observatory
- CosmicOS
- CosmoCaixa Barcelona
- Cosmoball
- Cosmobiology
- Cosmochemistry
- Cosmodome
- Cosmogenic nuclide
- Cosmogony
- Cosmographia (Bernardus Silvestris)
- Cosmographiae Introductio
- Cosmography
- Cosmolabe
- Cosmological constant
- Cosmological constant problem
- Cosmological decade
- Cosmological horizon
- Cosmological interpretation of quantum mechanics
- Cosmological lithium problem
- Cosmological natural selection
- Cosmological perturbation theory
- Cosmological principle
- Cosmology
- Cosmology (book)
- Cosmology Large Angular Scale Surveyor
- Cosmonautica
- Cosmonautics Day
- Cosmonauts Alley
- Cosmonova
- Cosmopolis XXI
- Cosmopolitan distribution
- Cosmos
- Cosmos (Sagan book)
- Cosmos 1
- Cosmos Redshift 7
- Cosmos and Psyche
- Cosmos: A Personal Voyage
- Cosmos: A Spacetime Odyssey
- Cosmos: Possible Worlds
- Cosmos: War of the Planets
- Cosmosphere
- Costa Rican pygmy owl
- Costume Contest
- Costume Quest
- Costume Quest 2
- Cot side
- Cotton Candy Nebula
- Cotton Comes to Harlem
- Cotton effect
- Couch surfing
- Couder (crater)
- Coudé Auxiliary Telescope
- Couloir
- Coulomb (crater)
- Coulomb collision
- Council for the Central Laboratory of the Research Councils
- Council of Laodicea
- Count Alois von Beckh Widmanstätten
- Count Floyd
- Count Gore de Vol
- Count Scary
- Countdown
- Countdown (1968 film)
- Counter-Earth
- Counter-Earth (comics)
- Counter-mapping
- Counterpoise (ground system)
- Counterstrike (drum and bass group)
- Counterweight
- Counting sheep
- Country Song (Pink Floyd song)
- Coup of 18 Brumaire
- Couperin (crater)
- Coupled Model Intercomparison Project
- Coupling, Energetics and Dynamics of Atmospheric Regions
- Courage the Cowardly Dog
- Courier 1B
- Courier Forschungsinstitut Senckenberg
- Course deviation indicator
- Courtney (crater)
- Couture crater
- Covariant derivative
- Cove
- Covenant (Halo)
- Cover Girl Models
- Cover crop
- Cowboy Bebop
- Cowboy Bebop (1998 video game)
- Cowboy Bebop: The Movie
- Cowboy Bebop: Tsuioku no Serenade
- Cowboy bedroll
- Cowboys & Aliens
- Cowon
- Cox and Underwood
- Coxcatlan Cave
- Coyolxāuhqui
- Crab (unit)
- Crab Nebula
- Crab Pulsar
- Crab-eating macaque
- Crackle breccia
- Crackle tube
- Cracovian
- Cradle (bed)
- Crag and tail
- Craig Chester (astronomer)
- Craig Edward DeForest
- Craig Ferguson
- Craig Hogan
- Craig Kilborn
- Craig Newmark
- Craig Richards (DJ)
- Craig telescope
- Cranbourne meteorite
- Cranbrook Educational Community
- Cranbury Park
- Crane Observatory
- Cranmer Park
- Crash – Cop's Daughter
- Crater (constellation)
- Crater 101
- Crater 2 Dwarf
- Crater Critters
- Crater chain
- Crater counting
- Crater depth
- Crater illusion
- Crater in Chinese astronomy
- Crater of eternal darkness
- Cratonic sequence
- Crawford Observatory
- Crawford crater
- Crawfordsville monster
- Crawler-transporter
- Crawlerway
- Crayford Manor House Astronomical Society
- Crayford focuser
- Crazy Horse (cabaret)
- Crazy Party Night (Pumpkin no Gyakushū)
- Crazy Planets
- Crazy Thunder Road
- Cream (nightclub)
- Creatio ex nihilo
- Creation Club
- Creation Engine
- Creation myth
- Creation of NASA
- Creation of life from clay
- Creationism
- Creative Energy Homes
- Creator deity
- Creature (1985 film)
- Creature Double Feature
- Creature Feature (1973 TV series)
- Creature Features
- Creature Features (1969 TV series)
- Creature Shock
- Creek mythology
- Creighton University Observatory
- Crematia Mortem
- Cremona (crater)
- Crenarchaeota
- Crepuscular animal
- Crescent
- Crescent (train)
- Crescent Nebula
- Cresol Red
- Cressida (moon)
- Crest (hydrology)
- Crest of the Stars
- Crested owl
- Cretaceous–Paleogene boundary
- Cretaceous–Paleogene extinction event
- Crevasse
- Crew Dragon C201
- Crew Dragon Demo-1
- Crew Dragon Demo-2
- Crew Dragon Endeavour
- Crew Dragon In-Flight Abort Test
- Crew Dragon Pad Abort Test
- Crew Dragon Resilience
- Crew Exploration Vehicle
- Crew Medical Support Office
- Crew Module Atmospheric Re-entry Experiment
- Crew Return Vehicle
- Crew equipment interface test
- Crewe (crater)
- Crewed Mars rover
- Cribbage
- Crider (soil)
- Criegee intermediate
- Crile (crater)
- Crimean Astrophysical Observatory
- Crimes of the Hot
- Criminally Insane (film)
- Criminally Insane 2
- Criminals Gone Wild
- Crimson Dragon
- Crimson Dynamo
- Crimson Sea
- Crisco Disco
- Crisis on Infinite Earths
- Crisis on Infinite Earths (Arrowverse)
- Crispin Freeman
- Cristiana Dumitrache
- Cristina Takacs-Vesbach
- Critical cartography
- Critical dimension
- Critical ionization velocity
- Critical point (thermodynamics)
- Critical system
- Critical-list minor planet
- Criticism of the Space Shuttle program
- Critters: A New Binge
- Crivitz (crater)
- Crocco (crater)
- Crom Cruach
- Cromer Shoal Chalk Beds
- Crommelin (Martian crater)
- Crommelin (lunar crater)
- Cronius the Pythagorean
- Cronus
- Crooked Billet, Wimbledon
- Crookers
- Crookes (crater)
- Crookes radiometer
- Crookes tube
- Crop Science Society of America
- Crop coefficient
- Crop rotation
- Crop tolerance to seawater
- Cross Bearer
- Cross Keys, Covent Garden
- Cross Keys, Dagenham
- Cross sea
- Cross section (physics)
- Cross-boundary subsidy
- Cross-plot
- Cross-resistance
- Crossatron
- Crossed Dragone
- Crossing the Red Sea
- Crossley telescope
- Crossover (Star Trek: Deep Space Nine)
- Crossworlds
- Crotylbarbital
- Crowdfunded satellites
- Crowdmapping
- Crown & Thistle, Gravesend
- Crown Hill Formation
- Crown Wetlands
- Crown and Anchor, Euston
- Crown and Thistle Inn, Monmouth
- Crown flash
- Crozier (crater)
- Crucible (Star Wars novel)
- Cruel Intentions
- Cruel Passion
- Cruinlagh
- Cruis'n Exotica
- Cruise ship pollution in Europe
- Cruise ship poolside theater
- Cruls (crater)
- Crumbling Land
- Crusade (TV series)
- Crusade (short story)
- Crust (geology)
- Crux
- Crux in Chinese astronomy
- Crying Suns
- CryoEDM
- CryoSat
- CryoSat-1
- CryoSat-2
- Cryobacterium psychrophilum
- Cryochemistry
- Cryoconite
- Cryogenian
- Cryogenic Dark Matter Search
- Cryogenic Low-Energy Astrophysics with Neon
- Cryogenic Rare Event Search with Superconducting Thermometers
- Cryoplanation
- Cryopump
- Cryoseism
- Cryosphere
- Cryosuction
- Cryoturbation
- Cryovolcano
- Cryptic (geology)
- Cryptoexplosion
- Crypton (particle)
- Cryptospore
- Crysis (video game)
- Crysis 3
- Crystal (comics)
- Crystal Singer
- Crystal violet
- Crüger (crater)
- Ctesibius (crater)
- Cthulhu
- Cthulhu Macula
- CubETH
- Cuba meteorite
- Cuban pygmy owl
- CubeRover
- CubeSail
- CubeSail (UltraSail)
- CubeSat
- CubeSat UV Experiment
- CubeSat for Solar Particles
- Cubesat Space Protocol
- Cuckold Formation
- Cuckoo Stone
- Cuckoo's Egg (book)
- Cuesta
- Culemborg fireworks disaster
- Culham Centre for Fusion Energy
- Culham Inlet
- Culmination
- Cultural Geographies
- Cultural astronomy
- Cultural depictions of Stonehenge
- Cultural eutrophication
- Cultural tracking
- Culture series
- Cumbrian Coast Group
- Cumulene
- Cunitz (crater)
- Cunningham (crater)
- Cuno Hoffmeister
- Cupid (moon)
- Cupola (ISS module)
- Cupola (geology)
- Cupriavidus metallidurans
- Cured (Red Dwarf)
- Curia Calabra
- Curie (Martian crater)
- Curie (lunar crater)
- Curiosity (rover)
- Curious George Gets a Medal
- Current (stream)
- Current sheet
- Current solar income
- Currentology
- Curse (video game)
- Cursus Barrows
- Curt Michel
- Curtis (crater)
- Curtis Brown
- Curtis Peebles
- Curtis Santiago
- Curtius (crater)
- Curtobacterium
- Curtobacterium flaccumfaciens
- Curtright field
- Curvaton
- Curvature collineation
- Curve of growth
- Curved space
- Cusanus (crater)
- Cusp (astrology)
- Cuspate foreland
- Cuspy halo problem
- Custer Observatory
- Custos Messium
- Cut La Roc
- Cut bank
- Cutans
- Cutt Off
- Cutty Sark (pub)
- Cuvier (crater)
- Cwm Llwyd Fault
- Cwm Pennant Fault
- Cyane Fossae
- Cyanide
- Cyanide fishing
- Cyanidin
- Cyanobacteria
- Cyanometer
- Cyberdemon
- Cyberman
- Cybermorph
- Cycle Psycho
- Cycler
- Cycles of Time
- Cyclic alternating pattern
- Cyclic model
- Cyclobacterium halophilum
- Cyclobacterium qasimii
- Cyclobacterium xiamenense
- Cyclobarbital
- Cyclone (Marvel Comics)
- Cyclone Global Navigation Satellite System
- Cyclonic Niño
- Cyclopean stairs
- Cyclopentobarbital
- Cyclopropane
- Cyclopropene
- Cyclopropyl cyanide
- Cyclops laser
- Cyclostratigraphy
- Cyclotron radiation
- Cyfoesi Myrddin a Gwenddydd ei Chwaer
- Cygnus (constellation)
- Cygnus (spacecraft)
- Cygnus A
- Cygnus CRS OA-4
- Cygnus CRS OA-5
- Cygnus CRS OA-6
- Cygnus CRS OA-7
- Cygnus CRS OA-8E
- Cygnus CRS OA-9E
- Cygnus CRS Orb-1
- Cygnus CRS Orb-2
- Cygnus CRS Orb-3
- Cygnus Loop
- Cygnus NG-10
- Cygnus NG-11
- Cygnus NG-12
- Cygnus NG-13
- Cygnus NG-14
- Cygnus NG-15
- Cygnus NG-16
- Cygnus OB2
- Cygnus OB2-12
- Cygnus OB2-8A
- Cygnus OB7
- Cygnus Orb-D1
- Cygnus X (star complex)
- Cygnus X-1
- Cygnus X-3
- Cygnus in Chinese astronomy
- Cyllene (moon)
- Cylon (Battlestar Galactica)
- Cymbaline
- Cymbeline (film)
- Cymdeithas Edward Llwyd
- Cynopterinae
- Cynthia E. Rosenzweig
- Cynthia Jameson
- Cypher (gamer)
- Cypress Hills Interprovincial Park
- Cypress dome
- Cyprián Karásek Lvovický
- Cyprus Space Exploration Organisation
- Cyprus scops owl
- Cyrano (crater)
- Cyril Hazard
- Cyril Jackson (astronomer)
- Cyril M. Kornbluth
- Cyril Ponnamperuma
- Cyrille Pierre Théodore Laplace
- Cyrillus (crater)
- Cysatus (crater)
- Cyteen
- Cytherean
- Cytotoxicity
- Czech Astronomical Olympiad
- Czech Hydrometeorological Institute
- Czech Republic
- Czech Space Office
- Czech names in space
- Céline Bœhm
- Cézanne (crater)
- Côte d'Azur Observatory
- Cāmara yoga
- Cửu Long Delta Rice Research Institute
- D Cancri
- D Carinae
- D Centauri
- D Velorum
- D'Alembert (crater)
- D'Arrest (crater)
- D'Arsonval (crater)
- D'Orbigny meteorite
- D-MARS
- D-Mark
- D-Rok
- D-brane
- D-term
- D-type asteroid
- D. Brainerd Holmes
- D. Harold McNamara
- DA-Group
- DAMA/LIBRA
- DAMA/NaI
- DAMP Project
- DAPPLE Project
- DART (satellite)
- DART radiative transfer model
- DAVE (CP-7)
- DAVINCI
- DB AutoZug
- DB-ALM
- DC10 (nightclub)
- DCMU
- DD Microscopii
- DDO 169
- DDO 190
- DDO 44
- DEAP
- DEEP-IN
- DEEP2 Redshift Survey
- DEN 0255−4700
- DEN 1048−3956
- DENIS J081730.0−615520
- DENIS J082303.1−491201
- DENIS-P J020529.0−115925
- DENIS-P J082303.1−491201 b
- DENIS-P J1058.7−1548
- DENIS-P J1228.2−1547
- DEPTHX
- DESTINY+
- DF-21
- DF-224
- DF-26
- DF-31
- DF-4
- DF-41
- DF-5
- DFM Engineering
- DFS Kopernikus
- DFS Kopernikus-3
- DG Canum Venaticorum
- DG Tauri B
- DGP model
- DH Cephei
- DH Tauri b
- DH-1 (rocket)
- DI Chamaeleontis
- DI Herculis
- DI Lacertae
- DICE model
- DIDO-2
- DISPERSION21
- DIVA software
- DJ AM
- DJ Antoine
- DJ Baby Anne
- DJ Bonics
- DJ Boston
- DJ Chus
- DJ Cocoa Chanelle
- DJ Dan
- DJ Dean
- DJ Dextrous
- DJ Disciple
- DJ EBK
- DJ EZ
- DJ Falcon
- DJ Froggy
- DJ Heavygrinder
- DJ Hidden
- DJ Hyper
- DJ Irene
- DJ JP
- DJ Jazzy Joyce
- DJ Keoki
- DJ Lynnwood
- DJ Paulette
- DJ Puffy
- DJ Puzzle
- DJ Reid Speed
- DJ Rekha
- DJ Ricardo!
- DJ Riddler
- DJ Rolando
- DJ Ron
- DJ SFR
- DJ SS
- DJ Scene
- DJ Skee
- DJ Skribble
- DJ Spinbad
- DJ Sun
- DJ Three
- DJ Tonka
- DJ Umek
- DJ Vibe
- DJ Yonny
- DJ Ötzi
- DK Lacertae
- DL Crucis
- DLA0817g
- DLR-Archenhold Near Earth Objects Precovery Survey
- DLR-Tubsat
- DM Geminorum
- DM Lyrae
- DN Geminorum
- DN Orionis
- DN160822 03
- DNA (Red Dwarf)
- DNA Lounge
- DO-160
- DO-178B
- DO-178C
- DO-212
- DO-219
- DO-254
- DODGE
- DOME MicroDataCenter
- DOME project
- DORIS (satellite system)
- DOS-2
- DP Leonis
- DP Leonis b
- DPANN
- DPHM-RS
- DQ Herculis
- DR 21
- DR 6 nebula
- DRAGONSat
- DRAKON
- DRDO Technology Demonstration Vessel
- DRL (video game)
- DS Andromedae
- DS Crucis
- DS Tucanae
- DS/CFT correspondence
- DS2000
- DSE-Alpha
- DSN Corporation
- DSN-2
- DSSAM Model
- DSSAT
- DSV Shinkai 2000
- DSV Shinkai 6500
- DT Virginis
- DTED
- DTU Space
- DTUsat
- DU Crucis
- DU Lyncis
- DU spectrophotometer
- DUMAND Project
- DUT1
- DV Aquarii
- DVS1
- DWANGO
- DX Andromedae
- DX Cancri
- DY Centauri
- DY Persei
- DY Persei variable
- Da Liu Ren
- Da Vinci (Martian crater)
- Da Vinci (lunar crater)
- Da Vinci Project
- DaWood
- Dabie-Sulu orogeny
- Dacite
- Daddy, Darling
- Daddy-O
- Daedalia Planum
- Daedalus (crater)
- Daffy Duck: The Marvin Missions
- Daft Punk
- Dafydd Williams
- Dagmar Nordstrom
- Dagobah
- Dagr
- Daguerre (crater)
- Dainya yoga
- Daisuke Enomoto
- Daksha
- Dakshinayana
- Dale (crater)
- Dale (landform)
- Dale Arden
- Dale Cruikshank
- Dale D. Myers
- Dale Frail
- Dale Gardner
- Dalek
- Dalgaranga crater
- Dali (crater)
- Dali (goddess)
- Dali Chasma
- Dalilah (crater)
- Dallas Abbott
- Dallas DuBois
- Dallasite
- Dallol (hydrothermal system)
- Dallol, Ethiopia
- Dalton (crater)
- Dalton Minimum
- Daly (lunar crater)
- Dambo
- Damer (crater)
- Damien Broderick
- Damis
- Damnatus
- Damo (philosopher)
- Damocloid
- Damodara
- Damoiseau (crater)
- Damon Dash
- Damon Knight
- Damon Simonelli
- Damon and Pythias
- Damped Lyman-alpha system
- Dan Alderson
- Dan Aykroyd
- Dan Cooper (comics)
- Dan Dare
- Dan H. Yaalon
- Dan Hooper
- Dan Milisavljevic
- Dan Steffan
- Dan Werthimer
- Dana Bergstrom
- Dana Mall
- Dana Medal
- Dana Weigel
- Dana van Dreven
- Dance bar
- Dance of the Vampires (musical)
- Dances with Smurfs
- Dandelion Crater
- Dandelion Energy
- Dandridge MacFarlan Cole
- Danger Run
- Dangerously Close
- Daniel (rocket)
- Daniel 1
- Daniel 2
- Daniel 4
- Daniel 7
- Daniel 8
- Daniel Apai
- Daniel Batcheldor
- Daniel Brandenstein
- Daniel C. Burbank
- Daniel Dos Santos
- Daniel Dumbacher
- Daniel E. Reichart
- Daniel Eisenstein
- Daniel Fry
- Daniel Huber
- Daniel Jackson (Stargate)
- Daniel Jaffe
- Daniel Jubb
- Daniel K. Inouye Solar Telescope
- Daniel Kirkwood
- Daniel M. Kimmel
- Daniel M. Popper
- Daniel M. Tani
- Daniel McKinsey
- Daniel Murphy (bishop)
- Daniel N. Baker
- Daniel Parsons
- Daniel Pomarède
- Daniel Rouan
- Daniel S. Schanck Observatory
- Daniel Santbech
- Daniel Sarokon
- Daniel Scholl Observatory
- Daniel Simon
- Daniel St. Pierre
- Daniel T. Barry
- Daniel W. Bursch
- Daniel du Toit
- Daniel's
- Daniela Billi
- Daniela Calzetti
- Daniell (crater)
- Danielle Egnew
- Danielson (crater)
- Danilova (crater)
- Danish Astronautical Society
- Danish Astronomical Society
- Danish Journal of Geography
- Danish Organisation for Renewable Energy
- Danish Space Research Institute
- Danjon (crater)
- Danjon scale
- Dannie Heineman Prize for Astrophysics
- Danny Cannon
- Danny Carey
- Danny Dunn and the Anti-Gravity Paint
- Danny Flynn (artist)
- Danny Frolich
- Danny Goes to Mars
- Danny Howells
- Danny Tenaglia
- Danny Thomas
- Danse macabre (Saint-Saëns)
- Dante (crater)
- Dante 01
- Dante Lauretta
- Dantu (crater)
- Danube Gorge (Weltenburg)
- Danube Planum
- Danube fan
- Danz CM
- Dao Vallis
- Daphnis (moon)
- Dar al Gani
- Dar al-Muwaqqit
- Dara Norman
- Dara O'Rourke
- Daran Norris
- Darbhanga Planetarium
- Darcy (unit)
- Darcy's law
- Daren Dochterman
- Daresbury Laboratory
- Daria Guidetti
- Darian calendar
- Daridorexant
- Daridra yoga
- Darin Epsilon
- Darius (series)
- Darius (video game)
- Darius Cozmic Collection
- Darius Force
- Darius Gaiden
- Darius II (video game)
- Darius Twin
- Dariusburst
- Dark (TV series)
- Dark Age (Brown novel)
- Dark Ages Radio Explorer
- Dark City (1998 film)
- Dark Cloud
- Dark Colony
- Dark Doodad Nebula
- Dark Emperor & Other Poems of the Night
- Dark Empire
- Dark Energy Spectroscopic Instrument
- Dark Energy Survey
- Dark Eyes (song)
- Dark Harvest (2004 film)
- Dark Horizon
- Dark Horse (astronomy)
- Dark Lord: The Rise of Darth Vader
- Dark Matter (TV series)
- Dark Matter (comics)
- Dark Matter Particle Explorer
- Dark Matter Time Projection Chamber
- Dark Phoenix (film)
- Dark Planet (film)
- Dark Seed II
- Dark Side (video game)
- Dark Side of the Moon (2002 film)
- Dark Skies
- Dark Skies (film)
- Dark Sky Observatory
- Dark Star (film)
- Dark They Were, and Golden-Eyed
- Dark Times: The Path to Nowhere
- Dark Universe Observatory
- Dark Was the Night, Cold Was the Ground
- Dark cabaret
- Dark earth
- Dark energy
- Dark flow
- Dark fluid
- Dark galaxy
- Dark globular cluster
- Dark matter
- Dark matter halo
- Dark moon
- Dark nebula
- Dark photon
- Dark radiation
- Dark septate endophyte
- Dark slope streak
- Dark star (Newtonian mechanics)
- Dark star (dark matter)
- Dark therapy
- Dark-energy star
- Dark-frame subtraction
- Dark-sky movement
- Dark-sky preserve
- DarkOrbit
- DarkSide
- DarkSpace
- DarkStar One
- Darken's equations
- Darkening Sky
- Darker (video game)
- Darklight Conflict
- Darkling (Star Trek: Voyager)
- Darklore Manor
- Darko Suvin
- Darkover
- Darkover Landfall
- Darkover series
- Darkspore
- Darkstar: The Interactive Movie
- Darktown Strutters
- Darlah
- Darlene Lim
- Darling Cabaret
- Darling Harbour
- Darling's Observatory
- Darney (crater)
- Darrell K. Sweet
- Darrell Schweitzer
- Darren Emerson
- Darren Tate
- Darrieus–Landau instability
- Darryl Knickrehm
- Dart (rocketry)
- Darth Vader
- Darts
- Darude
- Darusentan
- Darwin (Martian crater)
- Darwin (lunar crater)
- Darwin (spacecraft)
- Darwin glass
- Darwin–Radau equation
- Daryabar Fossa
- Daryal radar
- Daryl F. Mallett
- Daryl Haggard
- Darzamat (crater)
- Darío (crater)
- Das (crater)
- Dasadhyayi
- Dash Express
- Dasha (astrology)
- Dashami
- Dashboard of Sustainability
- Data Processing and Analysis Consortium
- Data assimilation
- Data2map
- DataScene
- Date Bait
- Datum of 2022
- Datura discolor
- Datura innoxia
- Daubrée (crater)
- Daubréelite
- Dauphin (rocket)
- Dave Audé
- Dave Beer
- Dave D'Mello
- Dave Dorman
- Dave Green (astrophysicist)
- Dave Lavery
- Dave Lee (DJ)
- Dave Lister
- Dave Pelz
- Dave Truesdale
- Dave Van Ronk
- Dave VanDam
- David & Carr
- David (crater)
- David A. Cherry
- David A. Hardy
- David A. Hubbard, Jr
- David A. King (engineer)
- David Alter
- David Axon
- David Ayer
- David Bischoff
- David Bohm
- David Bowie
- David Breed Beard
- David Brown (entrepreneur)
- David Burroughs Mattingly
- David C. Hilmers
- David C. Jewitt
- David Carson (director)
- David Catling
- David Charbonneau
- David Ciardi
- David Clarke (journalist)
- David Cole (record producer)
- David Cole Observatory
- David Crawford (astronomer)
- David Criswell
- David Cronenberg
- David D. Balam
- David D. Friedman
- David D. Levine
- David Davies (rugby league, born 1902)
- David Drewry
- David Dunlap Observatory
- David Dunlap Observatory Catalogue
- David Dunne (DJ)
- David E. Skaggs Research Center
- David E. Sugden
- David Edgar Cartwright
- David Elbaz
- David F. Dinges
- David Fabricius
- David Field (astrophysicist)
- David Florida Laboratory
- David Flower
- David Fowler (mathematician)
- David Frawley
- David Friesenhausen
- David G. Hartwell
- David G. Iadevaia
- David G. Turner
- David Gans
- David Gerdes
- David Gill (astronomer)
- David Gregory (mathematician)
- David Grinspoon
- David Grutman
- David Guetta
- David H. Levy
- David H. Lyth
- David H. Staelin
- David Healy (astronomer)
- David Helfand
- David Hilbert
- David Holmes (musician)
- David Hughes (astronomer)
- David Icke
- David J. Asher
- David J. Lane (astronomer)
- David J. Schlegel
- David J. Stevenson
- David J. Tholen
- David Kennedy (astronomer)
- David Kyle
- David L. Heiserman
- David L. Rabinowitz
- David Langford
- David Layzer
- David Leestma
- David Letterman
- David Louis Band
- David Lovelock
- David M. Brown
- David M. Jacobs
- David M. Jones
- David M. Walker (astronaut)
- David Mackay (pilot)
- David Malin
- David Mancuso
- David McClelland (physicist)
- David McDaniel
- David Meade (author)
- David Merritt
- David Morales
- David Morrison (astrophysicist)
- David Origanus
- David P. Anderson
- David Padilla (DJ)
- David Palumbo
- David Peck Todd
- David Penn (DJ)
- David Pringle
- David Rank
- David Reitze
- David Rittenhouse
- David Rothery
- David S. Garnett
- David S. McKay
- David Saint-Jacques
- David Schramm (astrophysicist)
- David Scott
- David Sobral
- David Southwood
- David Spade
- David Spergel
- David Stanley Evans
- David Starr, Space Ranger
- David Steel (Royal Navy officer)
- David Stewart Jenkinson
- David Stoddart (geographer)
- David Strangway
- David Sudarsky
- David Suzuki Foundation
- David Tegfan Davies
- David Todd Wilkinson
- David Twohy
- David Vendetta
- David Wands
- David Waxman
- David Wilkinson (theologian)
- David Williams (astrochemist)
- David Williams (card game player)
- David Wolf (astronaut)
- David Wu
- David ben Yom Tov
- Davidson Seamount
- Davies (crater)
- Davinia Taylor
- Davisson (crater)
- Davy (crater)
- Dawes (Martian crater)
- Dawes (lunar crater)
- Dawn
- Dawn (McLaughlin novel)
- Dawn (spacecraft)
- Dawn Sumner
- Dawn deities
- Dawn of the Dead (1978 film)
- Dawn of the Dead (2004 film)
- Dawn simulation
- Dawson (crater)
- Daxter (video game)
- Day
- Day Eleven: Love
- Day length fluctuations
- Day of the Dead (1985 film)
- Day of the Dead (2008 film)
- Day of the Dead 2: Contagium
- Day of the Dead: Bloodline
- Day of the Dumpster
- Day-Glo Color Corp.
- DayCent
- Daya Bay Reactor Neutrino Experiment
- Daybed
- Daylighting (streams)
- Days Are Forgotten
- Daytime
- Daz Saund
- Dazhbog Patera
- Dazu Lotus Manor
- Dažbog
- De Forest (crater)
- De Gasparis (crater)
- De Gerlache (crater)
- De Graft (crater)
- De Havilland Propellers
- De Heptarchia Mystica
- De La Rue (crater)
- De Lalande (crater)
- De Laval nozzle
- De Moraes (crater)
- De Morgan (crater)
- De Natura Fossilium
- De Phenomenis in Orbe Lunae
- De Roy (crater)
- De Sitter (crater)
- De Sitter effect
- De Sitter invariant special relativity
- De Sitter space
- De Sitter universe
- De Sitter–Schwarzschild metric
- De Vaucouleurs's law
- De Vico (crater)
- De Vries (crater)
- De revolutionibus orbium coelestium
- De sphaera mundi
- De systemate orbis cometici, deque admirandis coeli characteribus
- DeFRaG
- DeHackEd
- DeLisle Stewart
- DeLorme
- Deacon (rocket)
- Dead Beat (The Dresden Files)
- Dead Boy Detectives
- Dead Inside (song)
- Dead Man's Party (song)
- Dead Moon (video game)
- Dead Moon Circus
- Dead Sea
- Dead Space (mobile game)
- Dead Space (video game)
- Dead Space 2
- Dead Space 3
- Dead Space Ignition
- Dead Space: Extraction
- Dead Star/In Your World
- Dead or Alive 4
- Dead zone (ecology)
- Dead-ice
- Deadlock: Planetary Conquest
- Deadly Dreams
- Deadly Earnest
- Deadly Weapons
- Dean Benjamin McLaughlin
- Dean Grennell
- Dean Johnson (entertainer)
- Dean Martin
- Dean Regas
- Dean drive
- Dear Dave
- Dear God No!
- Dear Pen Pal
- DearMoon project
- Death (DC Comics)
- Death Busters
- Death Dimension
- Death Drug
- Death Faces
- Death Force
- Death Game
- Death Guild
- Death Hawk
- Death Journey
- Death Makes a Holiday
- Death Nurse
- Death Nurse 2
- Death Racers
- Death Scenes
- Death Screams
- Death Ship (The Twilight Zone)
- Death Star
- Death Star (business)
- Death Troopers
- Death Valley
- Death Valley National Park
- Death Warmed Up
- Death by Black Hole
- Death by GPS
- Death from the Skies!
- Death horoscopes in Tibetan Buddhism
- Death of Max Spiers
- Death on Demand
- Death's Domain
- Death: At Death's Door
- Death: The High Cost of Living
- Death: The Time of Your Life
- Deathstalker (series)
- Debaryomyces
- Debaryomyces hansenii
- Debatable Space
- Debate between Winter and Summer
- Debate between sheep and grain
- Debbie Hughes
- Debes (crater)
- Debility (astrology)
- Deborah Kelley
- Deborah Steinberg
- Deborah Swackhamer
- Debra Elmegreen
- Debra Fischer
- Debrecen Heliophysical Observatory
- Debris disk
- Debris flow
- Debus (crater)
- Debussy (crater)
- Debussy quadrangle
- Debye
- Debye (crater)
- Debye function
- Debye length
- Debye sheath
- Debye–Falkenhagen effect
- Debye–Hückel equation
- Debye–Hückel theory
- Debye–Waller factor
- Decadal Planning Team
- Decadary Cult
- Decade Volcanoes
- Decagram (geometry)
- Decan
- Decan (astrology)
- Decaturville crater
- Deceit (1989 film)
- Deceleration parameter
- December (Roman month)
- December solstice
- Decentralized wastewater system
- Deception Point
- Dechen (crater)
- Deci-hertz Interferometer Gravitational wave Observatory
- Decimal time
- Decker (TV series)
- Declan Perkins
- Declaration recognising the Right to a Flag of States having no Sea-coast
- Declination
- Deconfinement
- Decorah crater
- Decoupling (cosmology)
- Decree of Canopus
- Dee O'Hara
- Deep Bay crater
- Deep Black (1986 book)
- Deep Dish (duo)
- Deep Ecliptic Survey
- Deep Impact (film)
- Deep Impact (spacecraft)
- Deep Lens Survey
- Deep Navigation
- Deep Near Infrared Survey of the Southern Sky
- Deep Rock Galactic
- Deep Sea Conservation Coalition
- Deep Sea Research
- Deep Space 1
- Deep Space 2
- Deep Space Atomic Clock
- Deep Space Climate Observatory
- Deep Space Habitat
- Deep Space Homer
- Deep Space Industries
- Deep Space Nine (fictional space station)
- Deep Space Optical Communications
- Deep Space Systems
- Deep Space Transport
- Deep Space: Operation Copernicus
- Deep Underground Neutrino Experiment
- Deep carbon cycle
- Deep chlorophyll maximum
- Deep crustal hot zone
- Deep ecology
- Deep geological repository
- Deep scattering layer
- Deep sea community
- Deep sea mining
- Deep sleep therapy
- Deep space bands
- Deep space exploration
- Deep time
- Deep water cycle
- Deep-Sea Hydrothermal Vent Euryarchaeota 2
- Deep-Sky Planner
- Deep-level transient spectroscopy
- Deep-ocean Assessment and Reporting of Tsunamis
- Deep-sea exploration
- Deep-sky object
- DeepMap
- Deeper, Deeper, Deeper Still
- Def by Temptation
- Defender (1981 video game)
- Defenders of the Earth
- Defenestration
- Defense Advanced GPS Receiver
- Defense Grid 2
- Defense Grid: The Awakening
- Defense Meteorological Satellite Program
- Defense Satellite Communications System
- Defense Support Program
- Deferent and epicycle
- Defiance (TV series)
- Deficit irrigation
- Definition of planet
- Defoliant
- Deformation bands
- Deformed Hermitian Yang–Mills equation
- Defying Gravity (TV series)
- Degas (crater)
- Degenerate Higher-Order Scalar-Tensor theories
- Degenerate matter
- Deglaciation
- Degradation (geology)
- Degree Angular Scale Interferometer
- Degree Confluence Project
- Degree of ionization
- Degree of polarization
- Degrowth
- Deidre Hunter
- Deimos (moon)
- Deimos Imaging
- Deimos and Phobos Interior Explorer
- Deimos and The Resurrection of Mars
- Deimos-1
- Deimos-2
- Deinococcus
- Deinococcus apachensis
- Deinococcus ficus
- Deinococcus frigens
- Deinococcus geothermalis
- Deinococcus marmoris
- Deinococcus murrayi
- Deinococcus radiodurans
- Deinococcus saxicola
- Deinococcus–Thermus
- Dejnev (Martian crater)
- Dekatron
- Deke Slayton
- Delacroix (crater)
- Delambre (crater)
- Delaunay (crater)
- Delaunay tessellation field estimator
- Delaware Mineralogical Society
- Delayed sleep phase disorder
- Delco Carousel
- Delfi-C3
- Delfi-n3Xt
- Deliberate crash landings on extraterrestrial bodies
- Delinquent Daughters
- Delisle (crater)
- Dell Horoscope
- Della Duck
- Dellen
- Dellinger (crater)
- Delmotte (crater)
- Delocated
- Delorazepam
- Delphine Lannuzel
- Delphinus
- Delphinus in Chinese astronomy
- Delporte (crater)
- Delta (rocket family)
- Delta 0100
- Delta 1000
- Delta 2000
- Delta A
- Delta Andromedae
- Delta Antliae
- Delta Apodis
- Delta Aquarii
- Delta Aquilae
- Delta Arae
- Delta Arietis
- Delta Aurigae
- Delta Aurigids
- Delta B
- Delta Boötis
- Delta C
- Delta Caeli
- Delta Cancri
- Delta Cancrids
- Delta Canis Majoris
- Delta Canis Minoris
- Delta Capricorni
- Delta Cassiopeiae
- Delta Centauri
- Delta Cephei
- Delta Ceti
- Delta Chamaeleontis
- Delta Circini
- Delta Columbae
- Delta Coronae Australis
- Delta Coronae Borealis
- Delta Corvi
- Delta Crateris
- Delta Cryogenic Second Stage
- Delta Cygni
- Delta D
- Delta Delphini
- Delta Doradus
- Delta Draconis
- Delta Dreamflight
- Delta E
- Delta Equulei
- Delta Eridani
- Delta Fornacis
- Delta G
- Delta Geminorum
- Delta Gruis
- Delta Herculis
- Delta Horologii
- Delta Hydrae
- Delta Hydri
- Delta II
- Delta III
- Delta IV
- Delta Indi
- Delta J
- Delta L
- Delta Leonis
- Delta Leporis
- Delta Librae
- Delta Lupi
- Delta Lyrae
- Delta Lyrae cluster
- Delta M
- Delta Mensae
- Delta Microscopii
- Delta Monocerotis
- Delta Muscae
- Delta N
- Delta Normae
- Delta Octantis
- Delta Ophiuchi
- Delta Pavonis
- Delta Persei
- Delta Phoenicis
- Delta Pictoris
- Delta Piscis Austrini
- Delta Piscium
- Delta Pyxidis
- Delta Reticuli
- Delta Sagittae
- Delta Sagittarii
- Delta Scorpii
- Delta Sculptoris
- Delta Scuti
- Delta Scuti variable
- Delta Serpentis
- Delta Sextantis
- Delta Squadron (video game)
- Delta Tauri
- Delta Telescopii
- Delta Trianguli
- Delta Trianguli Australis
- Delta Tucanae
- Delta Ursae Majoris
- Delta Ursae Minoris
- Delta Velorum
- Delta Virginis
- Delta Volantis
- Delta-DOR
- Delta-K
- Delta-P
- Delta-v
- Delta-v budget
- Delta1 Canis Minoris
- Delta1 Chamaeleontis
- Delta1 Gruis
- Delta1 Lyrae
- Delta1 Tauri
- Delta1 Telescopii
- Delta2 Canis Minoris
- Delta2 Chamaeleontis
- Delta2 Gruis
- Delta2 Lyrae
- Delta2 Tauri
- Delta2 Telescopii
- Delta3 Canis Minoris
- Delta3 Tauri
- Deluc (crater)
- Dembowski (crater)
- Dementia 13
- Demequinaceae
- Demeter (satellite)
- Demetrios Christodoulou
- DemoSat
- Democrates
- Democratic principle
- Democritus (crater)
- Demographics of the world
- Demography
- Demon Seed (video game)
- Demonax (crater)
- Demonic possession
- Demons & Angels
- Demons (Star Trek: Enterprise)
- Demonstration and Science Experiments
- Demonwarp
- Den sommeren jeg fylte 15
- Denbigh Arms
- Dendera zodiac
- Dendrochronologia
- Deneb
- Deneb Karentz
- Deneb el Okab
- Deneb in fiction
- Denebola
- Denel Dynamics Bateleur
- Deng Qingming
- Denis Albert Bardou
- Denis Burgarella
- Denis Kenzo
- Denis Matveev
- Denis Villeneuve
- Denise Okuda
- Denison Olmsted
- Denitrification
- Denitrifying bacteria
- Denma
- Denmark Arms
- Denning (Martian crater)
- Denning (lunar crater)
- Dennis Brutus
- Dennis Chamberland
- Dennis Ferrer
- Dennis Fong
- Dennis K. Chesney
- Dennis Lyons
- Dennis M. Bushnell
- Dennis Mammana
- Dennis Rawlins
- Dennis Tito
- Dennis W. Sciama
- Dennis di Cicco
- Denny Tsettos
- Dense Pack
- Dense plasma focus
- Density contrast
- Density wave theory
- Denso Ten
- Denudation
- Denudation chronology
- Denver Museum of Nature and Science
- Denver Zephyr
- Deorbit of Mir
- Department of Defense Manned Space Flight Support Office
- Department of Geodesy GUT
- Department of Physics and Astronomy, University of Manchester
- Department of Space
- Depocenter
- Depolarization ratio
- Depolarizer (optics)
- Deponia (video game)
- Deponia Doomsday
- Deported Women of the SS Special Section
- Depositional environment
- Depression (geology)
- Depth conversion
- Depth in a well
- Depth sounding
- Depth–slope product
- Depyrogenation
- Der Alte Schwede
- Der Fan
- Der Naturforscher
- Der Vampyr
- Der Vampyr (Lindpaintner)
- Derain (crater)
- Derain quadrangle
- Derek Frank Lawden
- Derek Jackson
- Derek Keir
- Derek Long
- Derek Riggs
- Derek Vonberg
- Derek Walker-Smith, Baron Broxbourne
- Derivations of the Lorentz transformations
- Derivative house
- Deriving the Schwarzschild solution
- Derk-Jan Dijk
- Dermabacteraceae
- Dermott's law
- Derrick May (musician)
- Derrick Pitts
- Dersios sinkhole
- Derzhavin (crater)
- Desargues (crater)
- Desbutal
- Descartes (crater)
- Descartes Highlands
- Descendant (astrology)
- Descent (1995 video game)
- Descent (Star Trek: The Next Generation)
- Descent (upcoming video game)
- Descent 3
- Descent propulsion system
- Descent: FreeSpace – The Great War
- Deschloroetizolam
- Desdemona (moon)
- Deseilligny (crater)
- Desert
- Desert Beaver Observatory
- Desert Eagle Observatory
- Desert Fireball Network
- Desert Research Institute
- Desert Research and Technology Studies
- Desert Wind
- Desert pavement
- Desert planet
- Desert varnish
- Desertification
- Deserts and xeric shrublands
- Design Bureau for Special Machine-Building
- Desire (2017 film)
- Desire (ship)
- Deskee
- Deslandres (crater)
- Deslandres table
- Desolation Road
- Despicable Me (film)
- Despina (moon)
- Despréz (crater)
- Destination Earth
- Destination Mars
- Destination Moon (film)
- Destination: Imagination
- Destination: Void
- Destiny (ISS module)
- Destiny (video game)
- Destiny 2
- Destiny 2 post-release content
- Destiny in Space
- Destiny post-release content
- Destiny: A Chronicle of Deaths Foretold
- Destiny: The Taken King
- Destroy All Humans! 2
- Destroy All Monsters
- Desulfocella halophila
- Desulfoconvexum algidum
- Desulfofaba gelida
- Desulfofrigus fragile
- Desulfofrigus oceanense
- Desulfohalobium
- Desulfovibrio arcticus
- Desulfovibrio ferrireducens
- Desulfovirgula
- Desulfurobacterium thermolithotrophum
- Desulfurococcaceae
- Desulfurococcales
- Desulfurococcus
- Desus Nice
- Detached object
- Detecting Earth from distant star-based systems
- Detention basin
- Determination of the day of the week
- Detlef Quadfasel
- Detriment (astrology)
- Detrital zircon geochronology
- Detritivore
- Detroit 9000
- Detroit Opera House
- Detunatele
- Deuterium
- Deuterium arc lamp
- Deuterium fusion
- Deuteronilus Mensae
- Deutsch (crater)
- Deutsche Arbeitsgemeinschaft zum Schutz der Eulen
- Deutsches Geodätisches Forschungsinstitut
- Devasthal Observatory
- Development and Educational Communication Unit
- Development of Doom
- Development of The Elder Scrolls IV: Oblivion
- Development of the Commercial Crew Program
- Developmental toxicity
- Devil Girl from Mars
- Devil Hunter (film)
- Devil among the tailors
- Devil's Angels
- Devil's Night
- Devil's Night (American Horror Story)
- Devil's Sinkhole State Natural Area
- Devon Bat Group
- Devonshire Arms, Fitzroy
- Dew point
- Dewar (crater)
- Dewbow
- Dewi Ratih
- Dexamyl
- Dexter electron transfer
- Dextre
- Dextrorotation and levorotation
- Dezful (missile)
- Dhala crater
- Dhana yoga
- Dhanishta
- Dhanu (month)
- Dharma Karmadhipati yoga
- Dhatri
- Dhisana
- Dhruva Space
- DiRAC
- Dia (moon)
- Diabasbrottet Quarry
- Diachronism
- Diacria quadrangle
- Diagenesis
- Dialing scales
- Dialogo de Cecco di Ronchitti da Bruzene in perpuosito de la stella Nuova
- Dialogue Concerning the Two Chief World Systems
- Dialogues in Human Geography
- Diamant
- Diamantina Fracture Zone
- Diamantina River ring feature
- Diamicton
- Diamond
- Diamond (dog)
- Diamond Cross
- Diamond Light Source
- Diamond flaw
- Diana (Felderhoff)
- Diana (mythology)
- Diana Nemorensis
- Diana Pavlac Glyer
- Diana Prince
- Diana Valencia
- Diana the Huntress Fountain
- Diane L. Evans
- Diane McKnight
- Dianic Wicca
- Diapir
- Diary of a Camper
- Diary of a Nudist
- Diary of the Dead
- Diaspora (video game)
- Diathermancy
- Diatomaceous earth
- Diatomic carbon
- Diazotroph
- Dibyendu Nandi
- Dichloralphenazone
- Dichroism
- Dichroscope
- Dick Assman
- Dick Bond (astrophysicist)
- Dick Dyszel
- Dick Scobee
- Dick Smith (software)
- Dicke effect
- Dickens (crater)
- Dickinson (crater)
- Dictionary of Occult, Hermetic and Alchemical Sigils
- Dicuil
- Did You Ever See a Dream Walking?
- Diddy (DJ)
- Diderot (crater)
- Didier Queloz
- Die Arche
- Die Astronautin
- Die Glocke (hoax)
- Die Katakombe
- Die Schneider Krankheit
- Diedrich Wattenberg
- Diego Rodríguez (mathematician)
- Diego de Pantoja
- Dielectric breakdown model
- Dielectric spectroscopy
- Dienst der Hydrografie
- Dies (deity)
- Dieter Grau
- Diether Krebs
- Dietzia psychralcaliphila
- Difebarbamate
- Diffeomorphism constraint
- Differential Doppler effect
- Differential GPS
- Differential dynamic microscopy
- Differential interference contrast microscopy
- Differential optical absorption spectroscopy
- Differential rotation
- Differential stress
- Diffraction
- Diffraction efficiency
- Diffraction formalism
- Diffraction grating
- Diffraction in time
- Diffraction spike
- Diffraction-limited system
- Diffractive beam splitter
- Diffuse Infrared Background Experiment
- Diffuse extragalactic background radiation
- Diffuse interstellar bands
- Diffuse reflectance infrared Fourier transform spectroscopy
- Diffuse reflectance spectroscopy
- Diffuse series
- Diffuse sky radiation
- Diffuse supernova neutrino background
- Diffusing-wave spectroscopy
- Diffusion Inhibitor
- Diffusion chronometry
- Diffusion damping
- Diffusion-limited escape
- Difluorosilane
- Dig Allen Space Explorer
- Dig Down
- Digicel IMAX
- Digiscoping
- Digistar
- Digistar Users Group
- Digital Access to a Sky Century @ Harvard
- Digital Universe Atlas
- Digital anchor
- Digital elevation model
- Digital line graph
- Digital outcrop model
- Digital raster graphic
- Digital soil mapping
- Digital sundial
- DigitalGlobe
- Digitalism (band)
- Digitized Sky Survey
- Dikran Tahta
- Dilaton
- Dilhan Eryurt
- Dillon & Dickins
- Dillon's Reprise Room
- Dilly (crater)
- Dilmun (Titan)
- Dilution of precision (navigation)
- Diluvium
- Dimension Jump (Red Dwarf episode)
- Dimension X (Teenage Mutant Ninja Turtles)
- Dimension X (video game)
- Dimensional reduction
- Dimethyl sulfide
- Dimitar Sasselov
- Dimitri Hegemann
- Dimitri Mihalas
- Dimmitt (meteorite)
- Dimorphos
- Dinaric Alps
- Diner
- Dingle Dell meteorite
- Dingo Bar
- Dino (singer)
- Dinocyst
- Dinorwic (crater)
- Dinosaucers
- Dinosaur (film)
- Dinosaur Planet (novel)
- Dinosaur renaissance
- Dinosporin
- Dinsmore Alter
- Diné Bahaneʼ
- Diocotron instability
- Diodorus of Aspendus
- Diogenite
- Diogo Abreu (geographer)
- Dione (moon)
- Dionisia
- Dionysis Simopoulos
- Dionysius (crater)
- Diophantus (crater)
- Dioptra
- Dioptrics
- Dioxin Reassessment Report
- Dip slope
- Diphascon
- Diphenhydramine
- Diplomat (train)
- Diplomatic Immunity (novel)
- Dipole anisotropy
- Dipole model of the Earth's magnetic field
- Dipper (Chinese constellation)
- Dirac large numbers hypothesis
- Dirac string
- Direct DNA damage
- Direct Fusion Drive
- Direct ascent
- Direct collapse black hole
- Direct exchange geothermal heat pump
- Direct insolation
- Directed Energy System for Targeting of Asteroids and ExplorRation
- Directed panspermia
- Direction finding
- Directional Infrared Counter Measures
- Directional Recoil Identification from Tracks
- Directional boring
- Director General of the European Space Agency
- Dirichlet (crater)
- Dirichlet's ellipsoidal problem
- Dirk Brouwer
- Dirk Frimout
- Dirk Klinkenberg
- Dirk Reuyl
- Dirk Schulze-Makuch
- Dirk Terrell
- Dirt! The Movie
- Dirty Cop No Donut
- Dirty Water Club
- Dirtyphonics
- Disaster Monitoring Constellation
- Disc galaxy
- Disc permeameter
- Discharge (hydrology)
- Disco Bloodbath
- Disco Fever
- Disco Godfather
- Disco ball
- Discordant coastline
- Discotic liquid crystal
- Discourse on Comets
- Discourse on the Tides
- Discoverer 1
- Discoverer 10
- Discoverer 11
- Discoverer 12
- Discoverer 14
- Discoverer 16
- Discoverer 17
- Discoverer 18
- Discoverer 19
- Discoverer 2
- Discoverer 20
- Discoverer 21
- Discoverer 22
- Discoverer 23
- Discoverer 24
- Discoverer 25
- Discoverer 26
- Discoverer 27
- Discoverer 28
- Discoverer 29
- Discoverer 3
- Discoverer 30
- Discoverer 31
- Discoverer 32
- Discoverer 33
- Discoverer 34
- Discoverer 35
- Discoverer 36
- Discoverer 37
- Discoverer 4
- Discoverer 5
- Discoverer 6
- Discoverer 7
- Discoverer 8
- Discoverer 9
- Discoveries of exoplanets
- Discovery Investigations
- Discovery Museum and Planetarium
- Discovery One
- Discovery Rupes
- Discovery Seamounts
- Discovery and exploration of the Solar System
- Discovery image
- Discovery of Neptune
- Discovery of cosmic microwave background radiation
- Discredited hypotheses for the Cambrian explosion
- Discrete debris accumulation
- Discrete ordinates method
- Discrete spectrum
- Discworld (video game)
- Discworld (world)
- Discworld Diary
- Discworld II: Missing Presumed...!?
- Discworld MUD
- Discworld Noir
- Disease causative agent
- Disease suppressive soils
- Diseases from Space
- Disinfection by-product
- Disjunct distribution
- Disk Detective
- Disk-over-water method
- Disney (crater)
- Disney Dreams!
- Disney Gifts of Christmas
- Disney Illuminations
- Disney Infinity 3.0
- Disney Village
- Disney in the Stars
- Disney utilidor system
- Disney's Celebrate America
- Disney's Halloween Treat
- Disney's Lilo & Stitch (Game Boy Advance video game)
- Disney's LuminAria
- Disney's Nightmare in the Sky
- Disney's Stitch: Experiment 626
- Disneyland Forever
- Disneyland Monorail System
- Disneyland Railroad
- Disocactus anguliger
- Disocactus crenatus
- Dispersion (geology)
- Disrupted planet
- Dissimilatory metal-reducing microorganisms
- Dissociative recombination
- Dissolved load
- Dissolved organic carbon
- Distance measures (cosmology)
- Distances Between Ports
- Distant (upcoming film)
- Distant Worlds
- Distant minor planet
- Distant retrograde orbit
- Distorted Schwarzschild metric
- Distortion
- Distribution of lightning
- District 9
- Disturbance storm time index
- Disulfur monoxide
- Dita Von Teese
- Diurnal cycle
- Diurnal motion
- Diurnal sign
- Diurnality
- Divalia Fossa
- Dive bar (drinking establishment)
- Divertor
- Divided Loyalties (novel)
- Dividing engine
- Divination by Astrological and Meteorological Phenomena
- Divine Adoratrice of Amun
- Diviner
- Division for Planetary Sciences
- Division on Dynamical Astronomy
- Diwali
- Diwata-1
- Diwata-2
- Dixie Flagler
- Dixie Flyer (train)
- Diyar Planitia
- Dizzya
- Django Unchained
- Djordje Stanojević
- Djorgovski 1
- Dmitri Kondratyev
- Dmitri the Astronaut
- Dmitrij F. Lupishko
- Dmitriy G. Stankevich
- Dmitriy Petelin
- Dmitry Chestnov
- Dmitry Dmitrievich Maksutov
- Dmitry Okhotsimsky
- Dmitry V. Bisikalo
- Dmitry Zaikin
- Dmitryivanovite
- Dnepropetrovsk Sputnik
- Dnestr radar
- Dnipropetrovsk Oblast
- Do Androids Dream of Electric Sheep?
- Do They Know It's Hallowe'en?
- Do You Realize??
- Dobrovol'skiy (crater)
- Dobson ozone spectrophotometer
- Dobsonian telescope
- Dock Creek
- Dock Road Edwardian Pumping Station
- Docking Compartment
- Docking and berthing of spacecraft
- Doctor (Loïc Nottet song)
- Doctor Blood's Coffin
- Doctor Destiny
- Doctor Doctor (UFO song)
- Doctor Dolittle in the Moon
- Doctor Light (Kimiyo Hoshi)
- Doctor Madblood
- Doctor Omega
- Doctor Who
- Doctor Who – The Ultimate Adventure
- Document 12-571-3570
- Dodecagram
- Dodecatemoria
- Doerfel (crater)
- Dog (zodiac)
- Dog and Duck, Soho
- Dog days
- Dogs (Pink Floyd song)
- Dogsbody (novel)
- Dogyuun
- Dohkwibuhch
- Doina (Eminescu)
- Dolce e selvaggio
- Dolemite
- Doll Asylum
- Dollfus (crater)
- Dollond (crater)
- Dolomitization
- Dolphin Nature Conservation Society
- Dolphin lamp standard
- Domain wall (string theory)
- Domains of Darkover
- Dombarovsky Air Base
- Dome A
- Dome C
- Domed city
- Domenico Guglielmini
- Domenico Maria Novara da Ferrara
- Domenico Troili
- Domeyko Fault
- Domicile (astrology)
- Dominant Species (video game)
- Domination (video game)
- Dominic A. Antonelli
- Dominic Burns
- Dominic L. Pudwill Gorie
- Dominical letter
- Dominici (crater)
- Dominion Astrophysical Observatory
- Dominion Observatory
- Dominion Observatory, Wellington
- Dominion Radio Astrophysical Observatory
- Dominoes
- Domovoy (crater)
- Don Camilo
- Don Davis (artist)
- Don Diablo
- Don Dixon (artist)
- Don Dohler
- Don Eyles
- Don Flickinger
- Don Glaciation
- Don Harrington Discovery Center
- Don Ivan Punchatz
- Don L. Lind
- Don Maitz
- Don Melnick
- Don Pendleton
- Don Puddy
- Don Sakers
- Don Stephens
- Don VandenBerg
- Don Wilhelms
- Don Winget
- Don't Blame the Stork
- Don't Deliver Us from Evil
- Don't Escape: 4 Days to Survive
- Don't Fear the Roofer
- Don't Go in the House
- Don't Go in the Woods (1981 film)
- Don't Have a Cow (That's So Raven)
- Don't Leave Me Now (Pink Floyd song)
- Don't Look Up (upcoming film)
- Don't Open till Christmas
- Don-2N radar
- Donal T. Manahan
- Donald A. Thomas
- Donald A. Wollheim
- Donald B. Campbell
- Donald Blackwell
- Donald C. Backer
- Donald C. Parker
- Donald E. Brownlee
- Donald E. Ford
- Donald E. Williams
- Donald Edward Osterbrock
- Donald Figer
- Donald G. Keller
- Donald Glaude
- Donald H. Peterson
- Donald Holmquest
- Donald Howard Menzel
- Donald J. Atwood Jr.
- Donald J. Kessler
- Donald Keyhoe
- Donald Kurtz
- Donald L. Mallick
- Donald Liebenberg
- Donald Lynden-Bell
- Donald MacRae (astronomer)
- Donald Machholz
- Donald Mackay (scientist)
- Donald Pettit
- Donald R. Davis
- Donald R. F. Harleman
- Donald R. McMonagle
- Donald Sadler
- Donald's Halloween Scare
- Donaldson–Thomas theory
- Donat Fault
- Donat Wentzel
- Donatella Ricci
- Donati (crater)
- Donatiello I
- Donato Giancola
- Donelaitis (crater)
- Donella Meadows
- Dong Fang Hong 2
- Dong Fang Hong I
- Dong Neng-2
- Dongdamen Night Market
- Dongfanghong program
- Donghuamen Night Market
- Donn F. Eisele
- Donna (crater)
- Donna Shirley
- Donne (crater)
- Donner (crater)
- Donnie Darko
- Donnie Darko: The Director's Cut
- DontStayIn
- Doom (1993 video game)
- Doom (2016 video game)
- Doom (film)
- Doom (franchise)
- Doom 3
- Doom 3: BFG Edition
- Doom 3: Resurrection of Evil
- Doom 64
- Doom Eternal
- Doom II
- Doom II RPG
- Doom Mons
- Doom RPG
- Doom Resurrection
- Doom engine
- Doom modding
- Doom: Annihilation
- Doom: The Boardgame
- Doomguy
- Doomlord
- Doomsday (Doctor Who)
- Doomsday Book (film)
- Doomsday Machine (film)
- Doomsday Rock
- Doomsday rule
- Doppel-Sport Panoramic Camera
- Doppelgänger (1969 film)
- Doppelmayer (crater)
- Doppler (crater)
- Doppler Shift Compensation
- Doppler broadening
- Doppler cooling
- Doppler effect
- Doppler imaging
- Doppler parameter
- Doppler radio direction finding
- Doppler spectroscopy
- Doppler tracking
- Doppler velocity sensor
- Dopplergraph
- Dopplerite
- Dora (case study)
- Dora the Explorer: Journey to the Purple Planet
- Dorado
- Dorado Group
- Dorado in Chinese astronomy
- Doraemon: Nobita Drifts in the Universe
- Doraemon: Nobita and the Animal Planet
- Doraemon: Nobita and the Galaxy Super-express
- Doraemon: Nobita's Chronicle of the Moon Exploration
- Doraemon: Nobita's Little Star Wars
- Doraemon: The Record of Nobita's Spaceblazer
- Doraemon: The Records of Nobita, Spaceblazer
- Dorbod Banner
- Dorian Gray (club)
- Doris Abele
- Doris Daou
- Doris Vickers
- Dorota Skowron
- Dorothea Klumpke
- Dorothy (Charonian crater)
- Dorothy (Venusian crater)
- Dorothy Blackwell McNeil
- Dorothy Dandridge
- Dorothy Hill Medal
- Dorothy J. Heydt
- Dorothy Mengering
- Dorothy Metcalf-Lindenburger
- Dorrit Hoffleit
- Dorsa Aldrovandi
- Dorsa Andrusov
- Dorsa Argand
- Dorsa Argentea Formation
- Dorsa Barlow
- Dorsa Burnet
- Dorsa Cato
- Dorsa Dana
- Dorsa Ewing
- Dorsa Geikie
- Dorsa Harker
- Dorsa Lister
- Dorsa Mawson
- Dorsa Rubey
- Dorsa Smirnov
- Dorsa Sorby
- Dorsa Stille
- Dorsa Tetyaev
- Dorsa Whiston
- Dorsum Arduino
- Dorsum Azara
- Dorsum Bucher
- Dorsum Buckland
- Dorsum Cayeux
- Dorsum Cloos
- Dorsum Cushman
- Dorsum Gast
- Dorsum Grabau
- Dorsum Guettard
- Dorsum Heim
- Dorsum Higazy
- Dorsum Nicol
- Dorsum Niggli
- Dorsum Oppel
- Dorsum Owen
- Dorsum Scilla
- Dorsum Termier
- Dorsum Thera
- Dorsum Von Cotta
- Dorsum Zirkel
- Dorthe Dahl-Jensen
- Dory Rips
- Doryphoribius
- Dose (biochemistry)
- Dose–response relationship
- Dostoevskij (crater)
- Double (lunar crater)
- Double Agent 73
- Double Asteroid Redirection Test
- Double Chooz
- Double Cluster
- Double Exposure (1982 film)
- Double Fourier sphere method
- Double Helix Nebula
- Double Star
- Double Star (satellite)
- Double bass array
- Double copy theory
- Double diversion
- Double layer (plasma physics)
- Double mass analysis
- Double periodic variable
- Double planet
- Double star
- Double summit
- Double sunset
- Double, Double, Toil and Trouble
- Doublet state
- Doubletime (gene)
- Doubly ionized oxygen
- Doubly special relativity
- Doug Hurley
- Doug Liman
- Doug Rich
- Doug Shane
- Doug Weston
- Douglas Gough
- Douglas H. Wheelock
- Douglas Hill
- Douglas Mawson
- Douglas N. C. Lin
- Douglas SASSTO
- Douglas Trumbull
- Douglas Vakoch
- Douglass (Martian crater)
- Douglass (lunar crater)
- Doumu
- Doushantuo type preservation
- Dove (crater)
- Dove-2
- Dove-OSCAR 17
- Dover Demon
- Dowland (crater)
- Down by the Hipster
- Down to a Sunless Sea (Lin Carter novel)
- Downbelow Station
- Downcutting
- Downer (soil)
- Downhill creep
- Downrange
- Downscaling
- Downtime (Doctor Who)
- Downwelling
- Doxefazepam
- Doxepin
- Doxylamine
- Doyle Owl
- Doyle's Cafe
- Dr Dee
- Dr Mu
- Dr. Black, Mr. Hyde
- Dr. Creep
- Dr. Denton
- Dr. Gangrene
- Dr. Lamb
- Dr. Minx
- Dr. Neil Trivett Global Atmosphere Watch Observatory
- Dr. Seuss's Sleep Book
- Dr. Shiver
- Dr. Shock
- Dr. Who and the Daleks
- Draco (constellation)
- Draco Dwarf
- Draco Supercluster
- Draco in Chinese astronomy
- Draconids
- Dracs
- Dracula (Czech musical)
- Dracula - Swing of Death
- Dracula 3000
- Dracula Sucks
- Dracula vs. Frankenstein
- Dracula – Entre l'amour et la mort
- Dracula, the Musical
- Dracula: A Chamber Musical
- Dracula: the Musical
- Dradenau
- Draft Universe
- Drag and Atmospheric Neutral Density Explorer
- Dragon (Dragonriders of Pern)
- Dragon (remote sensing)
- Dragon (rocket)
- Dragon (zodiac)
- Dragon 2 DragonFly
- Dragon Ball Z: Bardock – The Father of Goku
- Dragon C106
- Dragon C108
- Dragon Harper
- Dragon Spacecraft Qualification Unit
- Dragon Storm (astronomy)
- Dragon and Slave
- Dragon's Egg
- Dragon's Fire
- Dragon's Kin
- Dragon's Time
- Dragon's egg
- Dragondrums
- Dragonetti: The Ruthless Contract Killer
- Dragonfish Nebula
- Dragonflight
- Dragonfly (Durbin novel)
- Dragonfly (spacecraft)
- Dragonfly 44
- Dragonfly Telephoto Array
- Dragonfly: NASA and the Crisis Aboard Mir
- Dragongirl
- Dragonheart (novel)
- Dragonquest
- Dragonsblood
- Dragonsdawn
- Dragonseye
- Dragonsinger
- Dragonsong
- Dragstrip Girl
- Dragstrip Girl (1994 film)
- Dragula (song)
- Dragão do Mar Center of Art and Culture
- Drainage basin
- Drainage density
- Drainage divide
- Drainage equation
- Drainage research
- Drainage system (geomorphology)
- Drake Planetarium and Science Center
- Drake equation
- Drake's Drum
- Drakengard 3
- Drakon (novel)
- Drakonjina špilja
- Draper (crater)
- Draper Laboratory
- Draw sheet
- Drawdown (hydrology)
- Drawing down the Moon (ritual)
- Dray Prescot series
- Drayton Arms, Earls Court
- Dreadful Sanctuary
- Dreadnought (video game)
- Dream
- Dream (1944 song)
- Dream (2008 film)
- Dream (Dizzee Rascal song)
- Dream (Suzy and Baekhyun song)
- Dream (character)
- Dream Analysis
- Dream Bank
- Dream Brother
- Dream Cave
- Dream Chaser
- Dream Corp LLC
- Dream Cycle
- Dream Demon
- Dream Director
- Dream Hunter Rem
- Dream Lover
- Dream Merchant
- Dream On (Aerosmith song)
- Dream On (Nazareth song)
- Dream Police (song)
- Dream Pool Essays
- Dream Weaver
- Dream a Little Dream of Me
- Dream art
- Dream diary
- Dream dictionary
- Dream guide
- Dream incubation
- Dream interpretation
- Dream sequence
- Dream sharing
- Dream speech
- Dream telepathy
- Dream vision
- Dream world (plot device)
- Dream yoga
- Dream, Dream
- DreamUp
- Dreamcatcher
- Dreamcatcher (novel)
- Dreamer (Europe song)
- Dreamer (Ozzy Osbourne song)
- Dreamer (Supertramp song)
- Dreamer Deceiver
- Dreamin' (Cliff Richard song)
- Dreamin' (Vanessa Williams song)
- Dreaming (Australian Aboriginal art)
- Dreaming (I Dream song)
- Dreaming of You (Selena song)
- Dreaming with a Broken Heart
- Dreamkiller
- Dreams (1990 film)
- Dreams (Beck song)
- Dreams (Diana DeGarmo song)
- Dreams (Fleetwood Mac song)
- Dreams (Gabrielle song)
- Dreams (High and Mighty Color song)
- Dreams (The Cranberries song)
- Dreams (The Game song)
- Dreams (Van Halen song)
- Dreams (Will Come Alive)
- Dreams Come True (song)
- Dreams of Empire
- Dreams of a Life
- Dreams to Reality
- Dreamside
- Dreamwork
- Drebach Observatory
- Drebbel (crater)
- Dredge-up
- Dreem (device)
- Dreem Teem
- Dreicer field
- Dreikanter
- Drekkana
- Dresden & Johnston
- Dresden Codex
- Dresden White Diamond
- Dreyer (crater)
- Drift ice
- Drift waves
- Drigganita
- Driller's depth
- Drilosphere
- Driscoll (crater)
- Drive Angry
- Drive-In Massacre
- Drive-in theater
- Drizzle (image processing)
- Dromore (crater)
- Dronino meteorite
- Drop structure
- Drop tube
- Dropa stones
- Dropout (astronomy)
- Dropping In Microgravity Environment
- Dropsonde
- Dropstone
- Drosophila circadian rhythm
- Drought
- Drought Research Initiative
- Drought refuge
- Drude (crater)
- Drug metabolism
- Druid's Head, Kingston upon Thames
- Drum (1976 film)
- Drumian
- Drumlin
- Drummer (soil)
- Druze
- Dry dam
- Dry quicksand
- Dry thunderstorm
- Dry well
- Dryden (crater)
- Drygalski (crater)
- Drying height
- Dryland salinity
- Du Fu (crater)
- Du Martheray (crater)
- Dual Air Density Explorer
- Dual Spires
- Dual Universe
- Dual graviton
- Dual mode propulsion rocket
- Dual photon
- Dual resonance model
- Dual segmented Langmuir probe
- Dual-Stage 4-Grid
- Dual-polarization interferometry
- Duane G. Carey
- Duane Graveline
- DubaiSat-1
- DubaiSat-2
- Dubakella
- Duban (crater)
- Dubyago (crater)
- Duccio (crater)
- Duck Dodgers (TV series)
- Duck Dodgers Starring Daffy Duck
- Duck Dodgers and the Return of the 24½th Century
- Duck Dodgers in the 24½th Century
- Duck Pimples
- Duck curve
- DuckTales (video game)
- DuckTales: Remastered
- Duckie (group)
- Duct Soup
- Ductility (Earth science)
- Dude, Where's My Car?
- Dufay (crater)
- Dufek Intrusion
- Dugan (crater)
- Duke Island (lunar mountain)
- Duke Nukem 3D
- Duke Nukem II
- Duke of Cumberland, Fulham
- Duke of Kent, Ealing
- Duke of Wellington, Belgravia
- Duke of Wellington, Bethnal Green
- Duke of York Inn, Elton
- Duke of York, Bloomsbury
- Duke of York, Ganwick Corner
- Duke of York, Leysters
- Dulcinea (The Expanse)
- Dumbbell Galaxy
- Dumbbell Nebula
- Dumitru Dediu
- Dunay radar
- Dunc's Halloween
- Duncan Jones
- Duncan Sommerville
- Duncan Steel
- Duncan Waldron
- Dune
- Dune (1984 film)
- Dune (2021 film)
- Dune (crater)
- Dune (novel)
- Dune (video game)
- Dune 2000
- Dune II
- Dune II (MUSH)
- Dune Messiah
- Dune prequel series
- Dune: House Atreides
- Dune: House Corrino
- Dune: House Harkonnen
- Dune: The Battle of Corrin
- Dune: The Butlerian Jihad
- Dune: The Machine Crusade
- Dunedin Astronomical Society
- Dungal of Bobbio
- Dungeon of the Endless
- Dunham Massey Hall sundial
- Dunham expansion
- Dunhuang Star Chart
- Dunlap Institute for Astronomy & Astrophysics
- Dunsink Observatory
- Dunthorne (crater)
- Dunyazad (crater)
- Dunér (crater)
- Duoplasmatron
- Duplex soil
- Dupuit–Forchheimer assumption
- Durban Industry Climate Change Partnership Project
- Durchmusterung
- Durham Cathedral
- Durham University Department of Physics
- Duria Antiquior
- Duricrust
- Durio graveolens
- Durio zibethinus
- Duripan
- Durisol
- Durk Pearson
- Durrington Walls
- Dusk
- Dust 514
- Dust devil
- Dust devil tracks
- Dust explosion
- Dust lane
- Dust solution
- DustPedia
- Dusty plasma
- Dutch Open Telescope
- Dutch elm disease
- Duvet cover
- Duília de Mello
- Dušan Kalmančok
- Dvorak technique
- Dvorák (crater)
- Dwadasama
- Dwadashi
- Dwarf elliptical galaxy
- Dwarf forest
- Dwarf galaxy
- Dwarf galaxy problem
- Dwarf nova
- Dwarf planet
- Dwarf slit-faced bat
- Dwarf spheroidal galaxy
- Dwarf spiral galaxy
- Dwarf star
- Dwayne Hicks
- Dwell time (GNSS)
- Dwile flonking
- Dwingeloo 1
- Dwingeloo 2
- Dwingeloo Radio Observatory
- Dwitiya
- Dyad (philosophy)
- Dyadobacter arcticus
- Dyadobacter crusticola
- Dyadobacter psychrophilus
- Dybbuk
- Dye tracing
- Dying Earth genre
- Dying of the Light (1977 novel)
- Dynameter
- Dynamic Albedo of Neutrons
- Dynamic Ionosphere CubeSat Experiment
- Dynamic light scattering
- Dynamic method
- Dynamic recrystallization
- Dynamic steady state
- Dynamic topography
- Dynamical dimensional reduction
- Dynamical friction
- Dynamical horizon
- Dynamical lifetime
- Dynamical parallax
- Dynamical time scale
- Dynamics Explorer
- Dynamics of the celestial spheres
- Dynamite Brothers
- Dynamo theory
- Dynetics
- Dynetics HLS
- Dynomak
- Dynoro
- Dyon
- Dysnomia (deity)
- Dysnomia (moon)
- Dyson (crater)
- Dyson sphere
- Dyson spheres in popular culture
- Dyson tree
- Dyson's eternal intelligence
- Dyson–Harrop satellite
- Dyssomnia
- Dziewulski (crater)
- Déjà Vu (company)
- Dépôt de la Guerre
- Dünyayı Kurtaran Adam
- Dürer (crater)
- Düsseldorf-Bilk Observatory
- E Carinae
- E Centauri
- E Nebula
- E Velorum
- E-40
- E-40-07
- E-ASTROGAM
- E-CORCE
- E-Group
- E-USOC
- E-Werk (Berlin)
- E-belt asteroids
- E-folding
- E-st@r
- E-st@r-II
- E-type asteroid
- E. Everett Evans
- E. F. Bleiler
- E. M. Antoniadi
- E. Myles Standish
- E. R. Ward Neale Medal
- E. Ruth Hedeman
- E. T. Whittaker
- E.Deorbit
- E.S.S. Mega
- E.T. (song)
- E.T. Adventure
- E.T. the Extra-Terrestrial
- E.V.O.: Search for Eden
- E.X. Troopers
- E0102
- EASE/ACCESS
- EAVP
- EBLM J0555-57
- EC 20058-5234
- EC50
- ECAPS
- ECEF
- ECHAM
- ECI Prize
- ECMWF re-analysis
- ECOSTRESS
- ECSS-E-TM-10-25A
- EChO
- EDELWEISS
- EDGE of Existence programme
- EE Pegasi
- EEGECS
- EELV Secondary Payload Adapter
- EETA 79001
- EF Eridani
- EG Andromedae
- EGS-zs8-1
- EGSY8p7
- EIRSAT-1
- EISCAT
- EK Trianguli Australis
- EKS (satellite system)
- EL Aquilae
- ELA-1
- ELA-2
- ELA-3
- ELEX
- ELFIN
- ELISA (satellite)
- ELODIE spectrograph
- EMBRACE (telescope)
- EMISAT
- EMMA (accelerator)
- EN 13537
- ENGIN-X
- ENGO
- EO Aurigae
- EOS-01
- EOSDIS
- EPA list of extremely hazardous substances
- EPIC 204278916
- EPIC 204376071
- EPIC 211945201 b
- EPOXI
- EQ Pegasi
- EQ Virginis
- EQUULEUS
- EQUiSat
- ER=EPR
- ERA-40
- ERM Telematics
- EROS (satellite)
- EROS A
- EROS B
- EROSITA
- ESA CAVES
- ESA Centre for Earth Observation
- ESA Optical Ground Station
- ESA Scientific Research on the International Space Station
- ESA Television
- ESO 137-001
- ESO 146-5
- ESO 198-13
- ESO 235-58
- ESO 269-57
- ESO 280-SC06
- ESO 3.6 m Telescope
- ESO 306-17
- ESO 325-G004
- ESO 439-26
- ESO 444-46
- ESO 453-13
- ESO 453-5
- ESO 510-G13
- ESO 540-030
- ESO 603-G21
- ESO Hotel
- ESO Supernova Planetarium & Visitor Centre
- ESO/ST-ECF Science Archive Facility
- ESPRESSO
- ESPRIT
- ESRB re-rating of The Elder Scrolls IV: Oblivion
- ESRO 2B
- ESSA-1
- ESSA-2
- ESSA-3
- ESSA-4
- ESSA-5
- ESSA-6
- ESSA-7
- ESSA-8
- ESSA-9
- ESTAR project
- ESTCube-1
- ESTCube-2
- ESTRACK
- ET Andromedae
- ET Virginis
- ETC Group (eco-justice)
- ETE (tokamak)
- ETRSS-1
- ETS-VII
- ETS-VIII
- EU Andromedae
- EUREF Permanent Network
- EUROGEO-European Association of Geographers
- EURONEAR
- EUROfusion
- EV Carinae
- EV Lacertae
- EVT-201
- EW Aquarii
- EX Hydrae
- EXOSAT
- EXPORT
- EXPOSE
- EXPRES
- EZ Aquarii
- EZ Canis Majoris
- Eacus (god)
- Eagle (Meridiani Planum crater)
- Eagle Butte crater
- Eagle Nebula
- Eagle Station meteorite
- Eagle Vision 1 (Commercial Satellite Imagery)
- Eagleheart (TV series)
- Earl C. Slipher
- Earl Kemp
- Earl Norem
- Earl of Essex, Manor Park
- Earle K. Bergey
- Earle K. Plyler Prize for Molecular Spectroscopy
- Earle L. Reynolds
- Early Germanic calendars
- Early Irish astrology
- Early Life Stage test
- Early Palaeozoic Icehouse
- Early Ruker orogeny
- Early life of Isaac Newton
- Earnshaw's theorem
- Earth
- Earth & Beyond
- Earth (Brin novel)
- Earth (classical element)
- Earth (wuxing)
- Earth 2 (TV series)
- Earth Afire
- Earth Awakens
- Earth Escape Explorer
- Earth Girls Are Easy
- Earth Impact Database
- Earth Interactions
- Earth Learning Idea
- Earth Observation Center
- Earth Observing System
- Earth Observing-1
- Earth Observing-3
- Earth Prime
- Earth Radiation Budget Satellite
- Earth Science Education Unit
- Earth Science Week
- Earth Similarity Index
- Earth Simulator
- Earth Spacedock
- Earth Story
- Earth Surface Dynamics
- Earth Surface Processes and Landforms
- Earth System Dynamics
- Earth System Governance Project
- Earth System Modeling Framework
- Earth System Research Laboratory
- Earth System Science Partnership
- Earth X
- Earth analog
- Earth and Planetary Science Letters
- Earth ellipsoid
- Earth embassy
- Earth in culture
- Earth in science fiction
- Earth inductor compass
- Earth mass
- Earth mysteries
- Earth observation
- Earth observation satellite
- Earth observation satellites transmission frequencies
- Earth orbit rendezvous
- Earth orientation parameters
- Earth phase
- Earth physical characteristics tables
- Earth pigment
- Earth radius
- Earth religion
- Earth science
- Earth sciences graphics software
- Earth structure
- Earth symbol
- Earth system governance
- Earth system science
- Earth systems engineering and management
- Earth systems model of intermediate complexity
- Earth tide
- Earth to Echo
- Earth trojan
- Earth's circumference
- Earth's critical zone
- Earth's crust
- Earth's crustal evolution
- Earth's energy budget
- Earth's inner core
- Earth's internal heat budget
- Earth's mantle
- Earth's orbit
- Earth's outer core
- Earth's rotation
- Earth's shadow
- Earth, Moon, and Planets
- Earth, Planets and Space
- Earth-616
- Earth-One
- Earth-Science Reviews
- Earth-Three
- Earth-Two
- Earth-centered inertial
- Earth-grazing fireball
- Earth-grazing meteoroid of 13 October 1990
- Earth-maker myth
- Earth: The Power of the Planet
- EarthArXiv
- EarthCARE
- EarthNow
- EarthSat
- Earthcore
- Earthflow
- Earthjet
- Earthlight
- Earthlight (astronomy)
- Earthlight (crater)
- Earthlight (video game)
- Earthling
- Earthlock
- Earthly Branches
- Earthquake
- Earthquake Research Institute, University of Tokyo
- Earthrise
- Earthrise (1990 video game)
- Earthscope
- Earthsea
- Earthworm
- Earth–Moon–Earth communication
- Earth–ionosphere waveguide
- East Asia Climate Partnership
- East Brazilian pygmy owl
- East Greenland Current
- East Greenland Ice-Core Project
- East Kentucky Science Center
- East Wind (train)
- East-Asian Planet Search Network
- Eastbrook, Dagenham
- Eastern Air Lines Flight 212
- Eastern Analytical Symposium
- Eastern Anatolia Observatory
- Eastern Asia (WGSRPD)
- Eastern Continental Divide
- Eastern Ghats
- Eastern Hemisphere
- Eastern Highlands
- Eastern Himalaya
- Eastern bent-wing bat
- Eastern forest–boreal transition
- Easting and northing
- Eastman (crater)
- Easy Rider
- Easy Wheels
- Eat My Dust!
- Ebb Cade
- Eben Jenks Loomis
- Ebenezer Cunningham
- Eberhard August Wilhelm von Zimmermann
- Eberhard Grün
- Eberhard Köllner
- Eberhard Rees
- Eberhart Jensen
- Eberswalde (crater)
- Ebola
- Ebola Syndrome
- Ebolavirus
- Ebony, Ivory & Jade
- Ebullism
- EcAMSat
- Eccentric Jupiter
- Eccentric anomaly
- Eccentricity vector
- Ecco the Dolphin (video game)
- Echecrates of Phlius
- Echegaray (crater)
- Echelle grating
- Echelon (1987 video game)
- Echelon cracks
- Echiniscus testudo
- Echinopsis eyriesii
- Echinopsis pachanoi
- Echo Night: Beyond
- EchoStar
- EchoStar I
- EchoStar II
- EchoStar III
- EchoStar IV
- EchoStar Mobile
- EchoStar V
- EchoStar VI
- EchoStar VII
- EchoStar VIII
- EchoStar X
- EchoStar XI
- EchoStar XIV
- EchoStar XV
- EchoStar XVI
- EchoStar XVII
- EchoStar XXI
- Echoes (Pink Floyd song)
- Echoes of Apollo
- Echopraxia (novel)
- Echostage
- Echus Chasma
- Echus Montes
- Eckert (crater)
- Eckfelder Maar
- Eclipse
- Eclipse (Pink Floyd song)
- Eclipse Phase
- Eclipse cycle
- Eclipse of Thales
- Eclipse season
- Eclipses: Astronomically and Astrologically Considered and Explained
- Ecliptic
- Ecliptic Plane Input Catalog
- Ecliptic coordinate system
- Eco.mont
- EcoHealth Alliance
- EcoTarium
- Ecohydrology
- Ecological anthropology
- Ecological classification
- Ecological death
- Ecological design
- Ecological economics
- Ecological engineering
- Ecological facilitation
- Ecological forecasting
- Ecological indicator
- Ecological light pollution
- Ecological niche
- Ecological regions of Quebec
- Ecological release
- Economic Geography (journal)
- Economic Geology (journal)
- Economic and Environmental Geology
- Economics of extraterrestrial resource extraction
- Ecopath
- Ecophagy
- Ecoprovince
- Ecopsychology
- Ecoregion
- Ecosharing
- Ecosystem
- Ecosystem diversity
- Ecosystem ecology
- Ecosystem engineer
- Ecosystem model
- Ecosystem service
- Ecosystem valuation
- Ecosystem-based management
- Ecotechnology
- Ecotone
- Ecotoxicity
- Ecoweek
- Ecphantus the Pythagorean
- Ectomycorrhiza
- Ecuadorian Civilian Space Agency
- Ecumene
- Ed & Red's Night Party
- Ed Baird
- Ed Emshwiller
- Ed Kenney
- Ed Krupp
- Ed Lu
- Ed Mirvish Theatre
- Ed Nather
- Ed Straker
- Ed White (astronaut)
- Ed Wood
- Ed van den Heuvel
- EdGCM
- Edaphobacter aggregans
- Edaphobacter modestus
- Edaphology
- Edarem
- Edd Cartier
- Eddie (crater)
- Eddie Gordon
- Eddie Jones (artist)
- Eddie Nash
- Eddington (crater)
- Eddington (spacecraft)
- Eddington Medal
- Eddington experiment
- Eddington luminosity
- Eddington number
- Eden (Lem novel)
- Eden Lake
- Eden Patera
- Edgar Bright Wilson
- Edgar Frisby
- Edgar G. Ulmer
- Edgar Langeveldt
- Edgar Mitchell
- Edgar Tillyer
- Edgar W. Woolard
- Edgar Wilson Award
- Edgar Wright
- Edgardo M. Latrubesse
- Edge effects
- Edge wave
- Edge-localized mode
- Edgeworth David
- Edinburgh-Cape Blue Object Survey
- Edison (crater)
- Edison Demonstration of Smallsat Networks
- Edison Pettit
- Edison's Conquest of Mars
- Edith Alice Müller
- Edith Fanta
- Edith Farkas
- Edith Klemperer
- Edmond Bonan
- Edmond Halley
- Edmond Herbert Grove-Hills
- Edmund Bertschinger
- Edmund Neville Nevill
- Edmund Scientific Corporation
- Edmund Weiss
- Edmund Wragge
- Edoardo Amaldi
- Edoardo Amaldi ATV
- Edscottite
- EduSAT
- Eduard Brückner
- Eduard Heis
- Eduard Mahler
- Eduard Meine van Zinderen-Bakker
- Eduard Richter
- Eduard Schönfeld
- Educational Launch of Nanosatellites
- Educator Astronaut Project
- Eduction (geology)
- Edvard Hugo von Zeipel
- Edward A. Halbach
- Edward Adrian Wilson
- Edward Anders
- Edward Belbruno
- Edward Bernard
- Edward Bernds
- Edward Brinton
- Edward Bulwer-Lytton
- Edward C. Stone
- Edward C. T. Chao
- Edward C. Welsh
- Edward Charles Howard
- Edward Charles Pickering
- Edward Colborne Baber
- Edward D. Swift
- Edward Daniel Johnson
- Edward E. Kramer
- Edward Emerson Barnard
- Edward F. Crawley
- Edward Fitzherbert (British Army officer)
- Edward Fomalont
- Edward Frederick Robert Bage
- Edward Gibson
- Edward Guinan
- Edward Israel
- Edward J. Ruppelt
- Edward J. Weiler
- Edward James (historian)
- Edward John White
- Edward Joseph Lowe
- Edward Kelley
- Edward Kolb
- Edward L. Beach Jr.
- Edward L. Cahn
- Edward L. Ferman
- Edward L. G. Bowell
- Edward L. Wright
- Edward Leamington Nichols
- Edward Linfoot
- Edward M. Sion
- Edward Makuka Nkoloso
- Edward Mercer
- Edward Mordrake (American Horror Story)
- Edward Mounier Boxer
- Edward Nairne
- Edward Nelson (marine biologist)
- Edward Pigot
- Edward Richardson (priest)
- Edward Riddle
- Edward Robert Festing
- Edward Robert Harrison
- Edward Rosen
- Edward S. Holden
- Edward Sabine
- Edward Scarlett
- Edward Skinner King
- Edward Spiegel
- Edward Stewart Kennedy
- Edward Troughton
- Edwards Air Force Base
- Edwin Bergin
- Edwin Brant Frost
- Edwin Charles Steinbrecher
- Edwin Dunkin
- Edwin Ernest Salpeter
- Edwin Foster Coddington
- Edwin Francis Carpenter
- Edwin Holmes (astronomer)
- Edwin Hubble
- Edwin Lincoln Moseley
- Edwin P. Martz
- Edwin Raub
- Edwin Silverman
- Eedle and Meyers
- Eelco Alta
- Eerie, Indiana: The Other Dimension
- Eez-eh
- Effect of Sun angle on climate
- Effect of spaceflight on the human body
- Effective evolutionary time
- Effective one-body formalism
- Effective porosity
- Effective radius
- Effective temperature
- Effects of Planet Nine on trans-Neptunian objects
- Effects of climate change on oceans
- Effects of overtime
- Effects of sleep deprivation in space
- Effects of sleep deprivation on cognitive performance
- Effects range low and effects range median
- Effelsberg 100-m Radio Telescope
- Effluent
- Effusion
- Efi Foufoula-Georgiou
- Egbert Adriaan Kreiken
- Ege University Observatory
- Egede (crater)
- Egevadluq Ragee
- Egg London
- Egg Nebula
- Eggatron
- Egonu (crater)
- Eguchi–Hanson space
- Egypt Mons
- EgyptSat 1
- EgyptSat 2
- EgyptSat-A
- Egyptian Theatre
- Egyptian Theatre (Coos Bay, Oregon)
- Egyptian Theatre (DeKalb, Illinois)
- Egyptian Theatre (Delta, Colorado)
- Egyptian astronomy
- Egyptian calendar
- Egyptian chronology
- Egyptian sun temple
- Ehlers group
- Ehrlich (crater)
- Eichstadt (crater)
- Eidouranion
- Eigenvector slew
- Eight Bells, Fulham
- Eight Worlds
- Eighth Cambridge Survey
- Eiji Tsuburaya
- Eijkman (crater)
- Eilat stone
- Eileen Collins
- Eileen Gunn
- Eimmart (crater)
- Einar Tandberg-Hanssen
- Einasto profile
- Einhard
- Einhänder
- Einstein (crater)
- Einstein Cross
- Einstein Gravity in a Nutshell
- Einstein Observatory
- Einstein Telescope
- Einstein Tower
- Einstein aether theory
- Einstein coefficients
- Einstein field equations
- Einstein protocol
- Einstein radius
- Einstein ring
- Einstein vs. Stephen Hawking
- Einstein's Bridge (novel)
- Einstein's Dreams
- Einstein's Unfinished Symphony
- Einstein's thought experiments
- Einstein's unsuccessful investigations
- Einstein@Home
- Einstein–Cartan theory
- Einstein–Hilbert action
- Einstein–Infeld–Hoffmann equations
- Einstein–Rosen metric
- Einstein–de Sitter universe
- Einthoven (crater)
- Eire Pub
- Eirene (moon)
- Eirik Newth
- Eise Eisinga
- Eise Eisinga Planetarium
- Eisenhorn
- Eisenhorn: Xenos
- Eisenhower dollar
- Eitoku (crater)
- Ejecta
- Ejecta blanket
- Ejler Jakobsson
- Ejnar Hertzsprung
- Ejriksson (Martian crater)
- Ekadashi
- Eki (goddess)
- Ekman layer
- Ekman spiral
- Ekman transport
- Ekman velocity
- Ekpyrotic universe
- Ekran
- Ekspress (satellite bus)
- Ekspress A2
- Ekspress A3
- Ekspress AM22
- Ekspress AM4
- Ekspress AM4R
- Ekspress AM5
- Ekspress AM6
- Ekspress AM7
- Ekspress AM8
- Ekspress AT1
- Ekspress AT2
- Ekspress MD1
- Ekspress MD2
- Ekspress-AMU1
- El (crater)
- El Arenosillo
- El Boludo (meteorite)
- El Capitan (Mars)
- El Capitan (train)
- El Capitan Theatre
- El Castillo, Chichen Itza
- El Gordo (galaxy cluster)
- El Hierro
- El Hierro Launch Centre
- El Tiro (meteorite)
- El Vino
- El diputado
- El sacerdote
- El-P
- Elagabalus (deity)
- Elaine Ingham
- Elaine Sadler
- Elaine Stritch
- Elaine Walker (composer)
- Elara (moon)
- Elastic Heart
- Elbo Room
- Elbogen (meteorite)
- Elbow (lunar crater)
- Elbow crater
- Elder Thing
- Elder race
- Eldridge M. Moores
- Eleanor F. Helin
- Eleanor Honnywill
- Eleanor Rieffel
- Eleazar of Worms
- Electional astrology
- Electra (radio)
- Electra (satellite)
- Electra (star)
- Electric arc
- Electric arc furnace
- Electric discharge
- Electric discharge in gases
- Electric sail
- Electric spark
- Electric-pump-fed engine
- Electrical aerosol spectrometer
- Electrical ballast
- Electrical breakdown
- Electrical discharge machining
- Electrical disruptions caused by squirrels
- Electrical system of the International Space Station
- Electrical treeing
- Electrically detected magnetic resonance
- Electrically powered spacecraft propulsion
- Electrically scanning microwave radiometer
- Electris deposits
- Electro-optical MASINT
- Electrochromism
- Electrodeless lamp
- Electrodeless plasma excitation
- Electrodeless plasma thruster
- Electrodynamic tether
- Electrogas welding
- Electrogravitics
- Electrojet
- Electrokinetic remediation
- Electromagnetic absorption by water
- Electromagnetic electron wave
- Electromagnetic propulsion
- Electromechanical disintegration
- Electron (rocket)
- Electron Microscopy Center
- Electron avalanche
- Electron backscatter diffraction
- Electron beam ion trap
- Electron cyclotron resonance
- Electron degeneracy pressure
- Electron diffraction
- Electron energy loss spectroscopy
- Electron interferometer
- Electron magnetic circular dichroism
- Electron nuclear double resonance
- Electron orbital imaging
- Electron paramagnetic resonance
- Electron phenomenological spectroscopy
- Electron spectrometer
- Electron spectroscopy
- Electron spiral toroid
- Electron wake
- Electronic Cultural Atlas Initiative
- Electronic centralised aircraft monitor
- Electronic flight bag
- Electronic flight instrument system
- Electronic speckle pattern interferometry
- Electrosexual
- Electroslag welding
- Electrostatic discharge
- Electrostatic ion cyclotron wave
- Electrostatic lens
- Electrostatic levitation
- Electrothermal instability
- Electrotroph
- Electrovacuum solution
- Electroweak epoch
- Electroweak star
- Electrowerkz
- Elegy (The Twilight Zone)
- Elektro-L No.1
- Elektro-L No.2
- Elektron (satellite program)
- Elektro–L
- Element Girl
- Elemental
- Elementary School Musical (The Simpsons)
- Elements (journal)
- Elena Aprile
- Elena Kazimirtchak-Polonskaïa
- Elena Ramírez Parra
- Elena V. Pitjeva
- Eleonora Troja
- Elephant trunk (astronomy)
- Elephant's Trunk Nebula
- Eles, Tunisia
- Elevated photography
- Elevation
- Elevational diversity gradient
- Elevator:2010
- Eleventh planet
- Elfie Hopkins
- Elger (crater)
- Elgin and Winter Garden Theatres
- Elgin, Ladbroke Grove
- Elginfield Observatory
- Elia Millosevich
- Elias 2-27
- Elijah Mizrachi
- Eline Tolstoy
- Elinor Busby
- Elinor Mavor
- Elis Strömgren
- Elisa Quintana
- Elisabeth Hevelius
- Elisabeth Isaksson
- Elisabeth von Matt
- Elisabetta Pierazzo
- Elise Matthesen
- Eliss
- Elite (video game)
- Elite Dangerous
- Elivagar Flumina
- Elizabeth Alexander (scientist)
- Elizabeth Anne Hull
- Elizabeth Beckley
- Elizabeth Brown (astronomer)
- Elizabeth Colbert Busch
- Elizabeth Hand
- Elizabeth J. Tasker
- Elizabeth Johnson (pamphleteer)
- Elizabeth Klarer
- Elizabeth Roemer
- Elizabeth Truswell
- Elizabeth Turtle
- Elizabeth Weir (Stargate)
- Elizaveta Karamihailova
- Ellen Asher
- Ellen Datlow
- Ellen Gould Zweibel
- Ellen Greene
- Ellen Harding Baker
- Ellen Mosley-Thompson
- Ellen Ochoa
- Ellen S. Baker
- Ellen Stofan
- Ellen Thomas (scientist)
- Ellerman (crater)
- Ellerman bombs
- Ellicott's Stone
- Ellington (crater)
- Elliot See
- Ellipsometry
- Elliptic flow
- Elliptic orbit
- Elliptical galaxy
- Elliptical polarization
- Ellis R. Lippincott Award
- Ellis drainhole
- Ellis wormhole
- Ellison (crater)
- Ellison Onizuka
- Elmer (crater)
- Elmer Balaban
- Elmo Says Boo!
- Elon Musk
- Elon Musk's Tesla Roadster
- Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future
- Elongation (astronomy)
- Elope, Inc.
- Elqui-Limarí Batholith
- Elsa G. Vilmundardóttir
- Elsa van Dien
- Elsevier Biobase
- Elsie Cohen
- Elsie Sunderland
- Elstree Studios
- Elstree Studios (Shenley Road)
- Eltanin impact
- Elton's quadrant
- Eluvium
- Elves (film)
- Elvey (crater)
- Elvira Presents Haunted Hits
- Elvira Presents Monster Hits
- Elvira's Halloween Special
- Elvis Tsui
- Elysium (volcanic province)
- Elysium Fire
- Elysium Fossae
- Elysium Mons
- Elysium Space
- Elysium quadrangle
- Eman Ghoneim
- Emanuel von der Pahlen
- Emanuelle Around the World
- Emanuelle and the Last Cannibals
- Emanuelle and the White Slave Trade
- Emanuelle in America
- Emanuelle in Bangkok
- Emballonuroidea
- Embedded cluster
- Embedded lens
- Emblem of Algeria
- Emblem of Angola
- Emblem of Djibouti
- Emblem of Ethiopia
- Emblem of Guinea-Bissau
- Emblem of Hong Kong
- Emblem of Italy
- Emblem of Kosovo
- Emblem of Kyrgyzstan
- Emblem of Macau
- Emblem of Maldives
- Emblem of Mozambique
- Emblem of North Korea
- Emblem of Sri Lanka
- Emblem of Tibet
- Emblem of Turkmenistan
- Emblem of Uzbekistan
- Emblem of Vietnam
- Emblem of Yugoslavia
- Emblem of the Abkhaz Autonomous Soviet Socialist Republic
- Emblem of the Adjar Autonomous Soviet Socialist Republic
- Emblem of the Armenian Soviet Socialist Republic
- Emblem of the Azerbaijan Soviet Socialist Republic
- Emblem of the Bashkir Autonomous Soviet Socialist Republic
- Emblem of the Byelorussian Soviet Socialist Republic
- Emblem of the Checheno-Ingush Autonomous Soviet Socialist Republic
- Emblem of the Chuvash Autonomous Soviet Socialist Republic
- Emblem of the Crimean Autonomous Soviet Socialist Republic
- Emblem of the Dagestan Autonomous Soviet Socialist Republic
- Emblem of the Estonian Soviet Socialist Republic
- Emblem of the Georgian Soviet Socialist Republic
- Emblem of the Kabardino-Balkarian Autonomous Soviet Socialist Republic
- Emblem of the Kalmyk Autonomous Soviet Socialist Republic
- Emblem of the Karelian Autonomous Soviet Socialist Republic
- Emblem of the Karelo-Finnish Soviet Socialist Republic
- Emblem of the Kazakh Soviet Socialist Republic
- Emblem of the Kirghiz Soviet Socialist Republic
- Emblem of the Komi Autonomous Soviet Socialist Republic
- Emblem of the Latvian Soviet Socialist Republic
- Emblem of the Lithuanian Soviet Socialist Republic
- Emblem of the Mari Autonomous Soviet Socialist Republic
- Emblem of the Moldavian Autonomous Soviet Socialist Republic
- Emblem of the Moldavian Soviet Socialist Republic
- Emblem of the Mordovian Autonomous Soviet Socialist Republic
- Emblem of the Nakhchivan Autonomous Soviet Socialist Republic
- Emblem of the North Ossetian Autonomous Soviet Socialist Republic
- Emblem of the People's Republic of Bulgaria
- Emblem of the Russian Soviet Federative Socialist Republic
- Emblem of the Socialist Republic of Romania
- Emblem of the Tajik Soviet Socialist Republic
- Emblem of the Tatar Autonomous Soviet Socialist Republic
- Emblem of the Transcaucasian Socialist Federative Soviet Republic
- Emblem of the Turkestan Autonomous Soviet Socialist Republic
- Emblem of the Turkmen Soviet Socialist Republic
- Emblem of the Tuvan Autonomous Soviet Socialist Republic
- Emblem of the Udmurt Autonomous Soviet Socialist Republic
- Emblem of the Ukrainian Soviet Socialist Republic
- Emblem of the Uzbek Soviet Socialist Republic
- Emblem of the Volga German Autonomous Soviet Socialist Republic
- Emblem of the Yakut Autonomous Soviet Socialist Republic
- Emblems of the Soviet Republics
- Embodied energy
- Embodied imagination
- Embrujada
- Embryo (song)
- Embryo space colonization
- Embutramide
- Emden (crater)
- Emden–Chandrasekhar equation
- Emek (movie theater)
- Emerald Theatre
- Emeraude (rocket)
- Emergency Detection System
- Emergent coastline
- Emergent gravity
- Emil Cohen
- Emil Ernst
- Emil Petaja
- Emil Racoviță
- Emil Truog
- Emile Plantamour
- Emilio Santos Corchero
- Emilios T. Harlaftis
- Emily (film)
- Emily Lakdawalla
- Emily Levesque
- Eminent Ecologist Award
- Eminescu (crater)
- Eminescu quadrangle
- Emios
- Emirates Lunar Mission
- Emirates Mars Mission
- Emirates Soil Museum
- Emissary (Star Trek: Deep Space Nine)
- Emission intensity
- Emission nebula
- Emission spectrum
- Emission-line star
- Emissions budget
- Emissions target
- Emissivity
- Emma Beckwith
- Emma Bunce
- Emma Chapman
- Emma Dean (crater)
- Emma Rush
- Emmanuel Hugot
- Emmanuel Mignot
- Emmanuelle (film)
- Emmett Leith
- Emohawk: Polymorph II
- Emory (crater)
- Emperor: Battle for Dune
- Empire (Kasabian song)
- Empire Builder
- Empire Star
- Empire from the Ashes
- Empire!
- Empire, Leicester Square
- Empires of Eve
- Employee Transfer
- Empress Theatre (Montreal)
- Empress of Mars
- Emptiness (Chinese constellation)
- Empusa
- Empyrean
- En echelon veins
- EnMAP
- EnVision (spacecraft)
- Enallylpropymal
- Encampment (Chinese constellation)
- Enceladus
- Enceladus Explorer
- Enceladus Icy Jet Analyzer
- Enceladus Life Finder
- Enceladus Life Signatures and Habitability
- Enchanted loom
- Enchantress from the Stars
- Encino Man
- Encke (crater)
- Enclave (geology)
- Encore Las Vegas
- Encounter at Farpoint
- Encounter in the Dawn
- Encounter with Tiber
- Encyclopedia Astronautica
- Encyclopedia Galactica
- Encyclopedia of the Brethren of Purity
- Encyclopedic Dictionary of Astronomy
- End of the World (1931 film)
- Endeavour (crater)
- Ender's Game (comics)
- Ender's Game (film)
- Ender's Game (novel series)
- Endgame (Star Trek: Voyager)
- Endless (comics)
- Endless Bummer (film)
- Endolith
- Endor (Star Wars)
- Endorheic basin
- Endorheic lake
- Endosymbiont
- Endothermic gas
- Endowment (Mormonism)
- Endurance (crater)
- Endurance: A Year in Space, a Lifetime of Discovery
- Enduring Quests and Daring Visions
- Endy Sleep
- Endymion (crater)
- Enectalí Figueroa-Feliciano
- Enemy Mine (film)
- Enemy Mine (novella)
- Enemy Territory: Quake Wars
- EnerWorks
- Energetic Gamma Ray Experiment Telescope
- Energetic neutral atom
- Energia Lunar Expedition
- Energia-100
- Energy & Environmental Science
- Energy Research Institute of the Russian Academy of Sciences
- Energy Systems Language
- Energy and Climate Intelligence Unit
- Energy being
- Energy condition
- Energy economics
- Energy flow (ecology)
- Energy level
- Energy policy
- Energy-dispersive X-ray diffraction
- Energy-dispersive X-ray spectroscopy
- Engel'gardt (crater)
- Engelbert Schücking
- Engelier
- EngenderHealth
- Enggano scops owl
- Engineering Geology (journal)
- Engineering controls
- Engraved Hourglass Nebula
- Enhanced GPS
- Enhanced avionics system
- Enhanced flight vision system
- Enhanced geothermal system
- Enhanced vegetation index
- Enheduanna (crater)
- Enhydro agate
- Enipeus Vallis
- Enki
- Enki Bilal
- Enki Catena
- Enlargement of the European Space Agency
- Enlighten Thy Daughter
- Enlightenment (Doctor Who)
- Enlil
- Enlil and Ninlil
- Ennead
- Enneagram (geometry)
- Enoch Fitch Burr
- Enormous Toroidal Plasma Device
- Enos (chimpanzee)
- Enriched Xenon Observatory
- Enrico Costa (physicist)
- Enrico Dalgas
- Enrico Fermi
- Enrico Palermo
- Enrique Loedel Palumbo
- Enrique of Malacca
- Enschede fireworks disaster
- Ensemble de Lancement Soyouz
- Ensemble forecasting
- Ensisheim meteorite
- Ensor (crater)
- Entangled (Red Dwarf)
- Enter Sandman
- Enterprise (Via Rail train)
- Enterprise Rupes
- Enthusiasm
- Entisol
- Entomopathogenic nematode
- Entomotoxicology
- Entrainment (chronobiology)
- Entrainment (physical geography)
- Entrapta
- Entropia Universe
- Entropic gravity
- Entropy (astrophysics)
- Entropy (video game)
- Enuma Anu Enlil
- Envelope (waves)
- Envenomation
- Envihab
- Environment Agency Wales
- Environment International
- Environmental Assessment Institute
- Environmental Chemistry (journal)
- Environmental Communication (journal)
- Environmental Development
- Environmental Earth Sciences
- Environmental Effects of Illicit Drug Production
- Environmental Fluid Mechanics
- Environmental Modeling Center
- Environmental Modelling & Software
- Environmental Pollution (journal)
- Environmental Quality Incentives Program
- Environmental Research
- Environmental Research Institute of Michigan
- Environmental Research Letters
- Environmental Science & Technology
- Environmental Science & Technology Letters
- Environmental Science Services Administration
- Environmental Science: Processes & Impacts
- Environmental Sciences Europe
- Environmental Toxicology and Chemistry
- Environmental Vulnerability Index
- Environmental analysis
- Environmental anthropology
- Environmental archaeology
- Environmental biotechnology
- Environmental chemistry
- Environmental communication
- Environmental consulting
- Environmental data rescue
- Environmental economics
- Environmental education
- Environmental effects of laundry wastewater
- Environmental engineering
- Environmental engineering science
- Environmental ethics
- Environmental geology
- Environmental hazard
- Environmental health
- Environmental health ethics
- Environmental hermeneutics
- Environmental history
- Environmental history of Latin America
- Environmental impact of pharmaceuticals and personal care products
- Environmental impact of silver nanoparticles
- Environmental impact statement
- Environmental informatics
- Environmental law
- Environmental modelling
- Environmental personhood
- Environmental policy
- Environmental politics
- Environmental psychology
- Environmental resource management
- Environmental science
- Environmental sensitivity
- Environmental social science
- Environmental soil science
- Environmental stewardship
- Environmental surveying
- Environmental vegetarianism
- Environmental virtue ethics
- Envisat
- Enwonwu (crater)
- Enzmann starship
- Enūma Eliš
- Eocyte hypothesis
- Eohypsibiidae
- Eon (magazine)
- Eonothem
- Eos
- Eos Chasma
- Eostrix
- Epaminondas Stassinopoulos
- Epcard
- Epcot Forever
- Epeirogenic movement
- Ephemeride Lunaire Parisienne
- Ephemeris
- Ephemeris day
- Ephemeris time
- Ephialtes (illness)
- Ephwurd
- Epiales
- Epic (video game)
- Epic of evolution
- Epicharmus of Kos
- Epicurus
- Epicyclic frequency
- Epideme
- Epidemic dropsy
- Epidemiology
- Epidemiology (Community)
- Epidemiology data for low-linear energy transfer radiation
- Epidendrum nocturnum
- Epigenes (crater)
- Epigenes of Byzantium
- Epigeus (crater)
- Epimenides
- Epimenides (crater)
- Epimetheus (moon)
- Epip
- Epiphreatic zone
- Epiphyllum
- Epiphyllum oxypetalum
- Epiphyllum pumilum
- Episodes (journal)
- Epistles of Wisdom
- Epitome Astronomiae Copernicanae
- Eplivanserin
- Epoch (astronomy)
- Epoch (geology)
- Epoch (video game)
- Epomophorinae
- Epping Forest Country Club
- Epsilon (film)
- Epsilon (rocket)
- Epsilon Andromedae
- Epsilon Antliae
- Epsilon Apodis
- Epsilon Aquarii
- Epsilon Aquilae
- Epsilon Arae
- Epsilon Arietis
- Epsilon Aurigae
- Epsilon Boötis
- Epsilon Cancri
- Epsilon Canis Majoris
- Epsilon Canis Minoris
- Epsilon Capricorni
- Epsilon Carinae
- Epsilon Cassiopeiae
- Epsilon Centauri
- Epsilon Cephei
- Epsilon Ceti
- Epsilon Chamaeleontis
- Epsilon Circini
- Epsilon Columbae
- Epsilon Coronae Australis
- Epsilon Coronae Borealis
- Epsilon Corvi
- Epsilon Crateris
- Epsilon Cygni
- Epsilon Delphini
- Epsilon Doradus
- Epsilon Draconis
- Epsilon Equulei
- Epsilon Eridani
- Epsilon Eridani b
- Epsilon Eridani in fiction
- Epsilon Fornacis
- Epsilon Geminorum
- Epsilon Gruis
- Epsilon Herculis
- Epsilon Hydrae
- Epsilon Hydri
- Epsilon Indi
- Epsilon Leonis
- Epsilon Leporis
- Epsilon Librae
- Epsilon Lupi
- Epsilon Lyrae
- Epsilon Mensae
- Epsilon Microscopii
- Epsilon Monocerotis
- Epsilon Muscae
- Epsilon Normae
- Epsilon Octantis
- Epsilon Ophiuchi
- Epsilon Pavonis
- Epsilon Pegasi
- Epsilon Persei
- Epsilon Phoenicis
- Epsilon Piscis Austrini
- Epsilon Piscium
- Epsilon Pyxidis
- Epsilon Reticuli
- Epsilon Reticuli b
- Epsilon Sagittae
- Epsilon Sagittarii
- Epsilon Scorpii
- Epsilon Sculptoris
- Epsilon Scuti
- Epsilon Serpentis
- Epsilon Sextantis
- Epsilon Tauri
- Epsilon Tauri b
- Epsilon Team
- Epsilon Telescopii
- Epsilon Trianguli
- Epsilon Trianguli Australis
- Epsilon Tucanae
- Epsilon Ursae Majoris
- Epsilon Ursae Minoris
- Epsilon Virginis
- Epsilon Volantis
- Epsilon1 Arae
- Epsilon2 Arae
- Eptesicini
- Epworth Sleepiness Scale
- Equal Rites
- Equal house system (Hindu astrology)
- Equal-Armed Cross
- Equant
- Equation of state (cosmology)
- Equation of the center
- Equation of time
- Equations for a falling body
- Equator
- Equatorial Atlantic Magmatic Province
- Equatorial Rossby wave
- Equatorial Vortex Experiment
- Equatorial ascendant
- Equatorial bulge
- Equatorial coordinate system
- Equatorial electrojet
- Equatorial layered deposits
- Equatorial mount
- Equatorial plasma bubble
- Equatorial platform
- Equatorial ridge
- Equatorial ridge on Iapetus
- Equatorial ring
- Equatorial room
- Equatorium
- Equestria
- Equiano (crater)
- Equilibrium partitioning sediment benchmark
- Equinox
- Equinox (celestial coordinates)
- Equivalence principle
- Equivalence principle (geometric)
- Equivalent width
- Equuleus
- Equuleus in Chinese astronomy
- Era (geology)
- Erasmus Oswald Schreckenfuchs
- Erasmus Reinhold
- Erathem
- Eratosthenes (crater)
- Eratosthenian
- Erbil Observatory
- Erciyes University Radio Observatory
- Ercole Dembowski
- Erden Eruç
- Erdkunde
- Erdstall
- Erebor Mons
- Erebus
- Erebus (crater)
- Erebus Montes
- Eremobiotus
- Eren Ozmen
- Ergosphere
- Erhard Etzlaub
- Erhard Weigel
- Eric (novel)
- Eric Agol
- Eric Bailey (politician)
- Eric Becklin
- Eric Bloom
- Eric Boe
- Eric C. Anderson
- Eric Chaisson
- Eric Flint
- Eric G. Blackman
- Eric Gairy
- Eric Goode
- Eric Hessels
- Eric J. Christensen
- Eric Lerner
- Eric Miller (musician)
- Eric Prydz
- Eric Rignot
- Eric S. Raymond
- Eric Schulman
- Eric Steig
- Eric Walter Elst
- Eric Wolff
- Erich Jantsch
- Erich Karkoschka
- Erich Meyer
- Erich Mühsam
- Erich Obst
- Erich Przybyllok
- Erich Regener
- Erich von Däniken
- Erick Morillo
- Erickatoure Aviance
- Ericoid mycorrhiza
- Ericsson R290
- Eridania Lake
- Eridania Planitia
- Eridania quadrangle
- Eridanos (geology)
- Eridanus (constellation)
- Eridanus Cluster
- Eridanus Group
- Eridanus II
- Eridanus in Chinese astronomy
- Erie Limited
- Erik Holmberg (astronomer)
- Erik Ian Asphaug
- Erik M. Conway
- Erik Prosperin
- Erik Quistgaard
- Erik Rhodes (actor, born 1906)
- Erik Satie
- Erik Selvig
- Erik Sørensen
- Erik Tengström
- Erika Blumenfeld
- Erika Böhm-Vitense
- Erika Hamden
- Erin Hotchkiss
- Erin Pettit
- Erinome
- Eriochrome Black T
- Eris (dwarf planet)
- Eris (mythology)
- Eris (simulation)
- Erlanger (crater)
- Erle Ellis
- Ernan McMullin
- Ernest H. Taves
- Ernest Leonard Johnson
- Ernest Scared Stupid
- Ernest William Brown
- Ernesto Capocci
- Ernie Anderson
- Ernst Abbe
- Ernst Friedrich Knorre
- Ernst Geissler
- Ernst Hartwig
- Ernst K. Zinner
- Ernst Krenkel Observatory
- Ernst Meissel
- Ernst Messerschmid
- Ernst Miescher
- Ernst R. G. Eckert
- Ernst Steinhoff
- Ernst Stuhlinger
- Ernst Zinner
- Ernst angle
- Ernst equation
- Ernst von Rebeur-Paschwitz
- Ernst Öpik
- Ernst-Abbe-Sportfeld
- Erodability
- Erol Alkan
- Erol Otus
- Erosion
- Erosion and tectonics
- Erosion control
- Erosion index
- Erosion prediction
- Erosion surface
- Erotic Nights of the Living Dead
- Erra-Pater
- Erriapus
- Erro (crater)
- Erroll Chunder Sen
- Error analysis for the Global Positioning System
- Ersa (moon)
- Erté (crater)
- Erwin Finlay-Freundlich
- Erwin Obermair
- Erwin Schwab
- Erwin Strauss
- Erygmascope
- Erythraean Sea
- Erythrolitmin
- Erznoznik v. City of Jacksonville
- Es'hail 2
- Es'hailSat
- Escalante (Martian crater)
- Escambia Amateur Astronomers Association
- Escape Dynamics
- Escape Velocity (video game)
- Escape Velocity Nova
- Escape Velocity Override
- Escape from Arcturus
- Escape from Cluster Prime
- Escape from Galaxy 3
- Escape from Mars
- Escape from New York
- Escape from Planet Earth
- Escape from the Planet of the Robot Monsters
- Escape in the Fog
- Escape pod
- Escape velocity
- Eschenberg Observatory
- Esclangon (crater)
- Escort Girls
- Esdat
- Eskimo Nebula
- Esko Valtaoja
- Esmeralda Mallada
- Esnault-Pelterie (crater)
- Espacio Lejano Station
- Espacio y Desarrollo
- Esperance Stonehenge
- Esperanto symbols
- Espin (crater)
- Espresso crema effect
- Esquel (meteorite)
- Esrange
- Esri
- Essaim (satellite)
- Essam Heggy
- Essential Biodiversity Variables
- Essential dignity
- Esso Research Centre
- Establishment of a port
- Estan Patera
- Estavelle
- Esteban Adame
- Esteban Terradas i Illa
- Estehlal Headquarters
- Estella Atekwana
- Estelle Asmodelle
- Estevan Antonio Fuertes
- Esther Friesner
- Estuaries and Coasts
- Estuarine, Coastal and Shelf Science
- Estuary
- Estudios Geológicos
- Eswatini
- Eszopiclone
- Eta Andromedae
- Eta Antliae
- Eta Apodis
- Eta Aquarii
- Eta Aquariids
- Eta Aquilae
- Eta Arae
- Eta Arietis
- Eta Aurigae
- Eta Boötis
- Eta Cancri
- Eta Canis Majoris
- Eta Canis Minoris
- Eta Capricorni
- Eta Carinae
- Eta Carinids
- Eta Cassiopeiae
- Eta Centauri
- Eta Cephei
- Eta Ceti
- Eta Chamaeleontis
- Eta Circini
- Eta Columbae
- Eta Coronae Australis
- Eta Coronae Borealis
- Eta Corvi
- Eta Crateris
- Eta Crucis
- Eta Cygni
- Eta Delphini
- Eta Doradus
- Eta Draconis
- Eta Eridani
- Eta Geminorum
- Eta Gruis
- Eta Herculis
- Eta Horologii
- Eta Hydrae
- Eta Hydri
- Eta Indi
- Eta Leonis
- Eta Leporis
- Eta Lupi
- Eta Lyrae
- Eta Mensae
- Eta Microscopii
- Eta Muscae
- Eta Normae
- Eta Ophiuchi
- Eta Orionis
- Eta Pavonis
- Eta Pegasi
- Eta Persei
- Eta Phoenicis
- Eta Pictoris
- Eta Piscis Austrini
- Eta Piscium
- Eta Pyxidis
- Eta Reticuli
- Eta Sagittae
- Eta Sagittarii
- Eta Scorpii
- Eta Sculptoris
- Eta Scuti
- Eta Serpentis
- Eta Telescopii
- Eta Trianguli Australis
- Eta Tucanae
- Eta Ursae Majoris
- Eta Ursae Minoris
- Eta Virginis
- Eta Volantis
- Eta1 Coronae Australis
- Eta1 Doradus
- Eta1 Hydri
- Eta1 Pictoris
- Eta2 Coronae Australis
- Eta2 Doradus
- Eta2 Hydri
- Eta2 Hydri b
- Eta2 Pictoris
- Etak
- Etalon (satellite)
- Eternal inflation
- Eternals (film)
- Eternity Road (song)
- Eternity Weeps
- Eterobarb
- Ethallobarbital
- Ethan Siegel
- Ethan Vishniac
- Ethan of Athos
- Ethanimine
- Ethel Bellamy
- Ethenone
- Ethical extensionism
- Ethics of terraforming
- Ethics of uncertain sentience
- Ethinamate
- Ethiopia
- Ethiopia – United States Mapping Mission
- Ethnogeology
- Ethyl loflazepate
- Ethylene glycol poisoning
- Etizolam
- Etodroxizine
- Ettore Bortolotti
- EuCROPIS
- Euan MacKie
- Euanthe (moon)
- Euboea Montes
- Eucla Basin
- Euclid (spacecraft)
- Euclidean quantum gravity
- Euclides (crater)
- Eucrite
- Euctemon (crater)
- Eudoxus (Martian crater)
- Eudoxus (lunar crater)
- Eugen Sänger
- Eugene Aserinsky
- Eugene H. Trinh
- Eugene L. Tattini
- Eugene Loh
- Eugene Merle Shoemaker
- Eugene Milone
- Eugene Parker
- Eugene Podkletnov
- Eugene Rabe
- Eugenie… The Story of Her Journey into Perversion
- Eugenio de Bellard Pietri
- Eugenius I of Toledo
- Eugeniusz Rybka
- Eugène Joseph Delporte
- Eugène Lourié
- Eugénie de Sade
- Eukelade
- Euler (crater)
- Euler characteristic of an orbifold
- Euler's three-body problem
- Eumetcast
- Eun-Suk Seo
- Eunomia family
- Eupheme (moon)
- Euporie (moon)
- Eurasian Astronomical Society
- Eurasian Geography and Economics
- Eureka, Nunavut
- Eurekan orogeny
- Euripus Mons
- Euro Space Center
- Euro-Mediterranean Center on Climate Change
- Euro-Mir
- Euro-VO
- EuroNight
- Eurobird
- Eurockot Launch Services
- Eurocode 7: Geotechnical design
- Euroluna
- Euromir
- Europa (moon)
- Europa (rocket)
- Europa Clipper
- Europa Imaging System
- Europa Jupiter System Mission – Laplace
- Europa Lander
- Europa Orbiter
- Europa Report
- Europa Thermal Emission Imaging System
- Europa Ultraviolet Spectrograph
- European Association for Astronomy Education
- European Association of Remote Sensing Laboratories
- European Astrobiology Network Association
- European Astronaut Centre
- European Astronaut Corps
- European Astronomical Society
- European Atlas of the Seas
- European Bat Night
- European Centre for Medium-Range Weather Forecasts
- European Centre for Space Applications and Telecommunications
- European Climate Foundation
- European Combined Geodetic Network
- European Commissioner for Industry and Entrepreneurship
- European Conference on Radar in Meteorology and Hydrology
- European Cooperation for Space Standardization
- European Data Relay System
- European Digital Archive on Soil Maps of the World
- European Drawer Rack
- European Environment Agency
- European Fireball Network
- European GNSS Agency
- European Geography Association
- European Geosciences Union
- European Geostationary Navigation Overlay Service
- European Gravitational Observatory
- European Journal of Remote Sensing
- European Launcher Development Organisation
- European Low Gravity Research Association
- European Lunar Explorer
- European Mars Analog Research Station
- European Multidisciplinary Seafloor and water column Observatory
- European Northern Observatory
- European Organisation for Civil Aviation Equipment
- European Organisation for the Exploitation of Meteorological Satellites
- European Physical Journal D
- European Physiology Modules
- European Plain
- European Pollen Database
- European Programme for Life and Physical Sciences in Space
- European Project on Ocean Acidification
- European Pulsar Timing Array
- European Remote-Sensing Satellite
- European Retrievable Carrier
- European Robotic Arm
- European Rover Challenge
- European Satellite Navigation Competition
- European Satellite Navigation Industries
- European Service Module
- European Sleep Apnea Database
- European Soil Bureau Network
- European Soil Database
- European Solar Physics Division
- European Solar Telescope
- European Southern Observatory
- European Southern Observatory Catalog
- European Space Agency
- European Space Agency Science Programme
- European Space Astronomy Centre
- European Space Camp
- European Space Information System
- European Space Operations Centre
- European Space Research Organisation
- European Space Research and Technology Centre
- European Space Security and Education Centre
- European Space Weather portal
- European Student Moon Orbiter
- European Synchrotron Radiation Facility
- European Technology Exposure Facility
- European Transportation Carrier
- European Underground Rare Event Calorimeter Array
- European Union Agency for the Space Programme
- European Union System for the Evaluation of Substances
- European VLBI Network
- European Venus Explorer
- European contribution to the International Space Station
- European eXPErimental Re-entry Testbed
- European environmental research and innovation policy
- European grid
- European hazard symbols
- European watershed
- Europlanet
- Europlanetarium Genk
- Eurospace
- Eurospy film
- Eurostar (satellite bus)
- Eurostar E3000
- Euryarchaeota
- Eurydome (moon)
- Eurymedon (mythology)
- Eurytus (Pythagorean)
- Eustachio Manfredi
- Eutelsat
- Eutelsat 113 West A
- Eutelsat 115 West B
- Eutelsat 117 West A
- Eutelsat 16B
- Eutelsat 16C
- Eutelsat 21B
- Eutelsat 25B/Es'hail 1
- Eutelsat 31A
- Eutelsat 33B
- Eutelsat 33C
- Eutelsat 33E
- Eutelsat 36A
- Eutelsat 36B
- Eutelsat 3D
- Eutelsat 4A
- Eutelsat 5 West A
- Eutelsat 5 West B
- Eutelsat 70B
- Eutelsat 8 West C
- Eutelsat I F-1
- Eutelsat Konnect
- Eutelsat W3A
- Eutrophication
- Eutropical subsea
- Euxinia
- Eva Ahnert-Rohlfs
- Eva Grebel
- Eva Longoria
- Evan Lorne
- Evans & Sutherland
- Evans (crater)
- Evans Starzinger
- Evaporating gaseous globule
- Evaporation
- Evapotranspiration
- Evdokimov (crater)
- Eve Graham
- Eve Online
- Eve Sleep
- Eve's Hangout
- Eve: The Second Genesis
- Eve: Valkyrie
- Evection
- Evelyn C. Leeper
- Evelyn Miralles
- Evening economy
- Evening's Empires
- Event 0
- Event Horizon (film)
- Event Horizon Telescope
- Event chart
- Event horizon
- Event symmetry
- Ever Upwards: ISRO in Images
- Everett Kinstler
- Everett's scops owl
- Evershed (crater)
- Evershed effect
- Everspace
- Every Christian Lion Hearted Man Will Show You
- Every Picture Tells a Story (event)
- Everything Happens to Me (1980 film)
- Everything's Magic
- Evgenidio Foundation
- Evgeny Tarelkin
- Evidence of water on Mars found by Mars Reconnaissance Orbiter
- Evidence of water on Mars from Mars Odyssey
- Evidence-based conservation
- Evidence-based toxicology
- Evil Laugh
- Evil-Lyn
- Evo Terra
- Evochron Alliance
- Evochron Legends
- Evochron Renegades
- Evolution (Baxter novel)
- Evolution of Hawaiian volcanoes
- Evolutionary Map of the Universe
- Evolutionary fauna
- Evolva
- Evolve (video game)
- Evolving the Alien
- Evoxine
- Evryscope
- Ew!
- Ewald's sphere
- Ewan Pearson
- Ewen Whitaker
- Ewine van Dishoeck
- Ewok
- Ewoks: The Battle for Endor
- ExPRESS Logistics Carrier
- ExPace
- Exact solutions in general relativity
- Exaltation (astrology)
- Excalibur Almaz
- Excavations at Stonehenge
- Exceptional Public Achievement Medal
- Excession
- Excessive daytime sleepiness
- Excimer lamp
- Excited and Scared
- Exclusive economic zone
- Excursion to the Moon
- Executive Committee of the Space Research Council
- Executor (rocket engine)
- Exeligmos
- Exeter Cathedral astronomical clock
- Exfoliating granite
- Exfoliation joint
- Exhaust gas
- Exhumation (geology)
- Exhumed river channel
- Exiguobacterium
- Exile's Song
- Exmoor
- Exner equation
- Exner function
- ExoCube (CP-10)
- ExoLance
- ExoLife Finder
- ExoMars
- ExoMol
- Exoatmospheric Kill Vehicle
- Exoatmospheric Reentry-vehicle Interceptor Subsystem
- Exobiology Radiation Assembly
- Exocomet
- Exodus (Starfire)
- Exogenesis: Symphony
- Exolaunch
- Exomedicine
- Exomoon
- Exoplanet
- Exoplanet Data Explorer
- Exoplanet Explorers
- Exoplanet naming convention
- Exoplanetary Circumstellar Environments and Disk Explorer
- Exoplanetology
- Exos Aerospace
- Exosphere
- Exotheology
- Exotic Erotic Ball
- Exotic matter
- Exotic star
- Exozodiacal dust
- Expanded clay aggregate
- Expanded crater
- Expander cycle
- Expanding Earth
- Expanding nozzle
- Expansion of the universe
- Expansions of Eve Online
- Expansive clay
- Expectation fulfilment theory of dreaming
- Expedition (book)
- Expedition 1
- Expedition 10
- Expedition 11
- Expedition 12
- Expedition 13
- Expedition 14
- Expedition 15
- Expedition 16
- Expedition 17
- Expedition 18
- Expedition 19
- Expedition 2
- Expedition 20
- Expedition 21
- Expedition 22
- Expedition 23
- Expedition 24
- Expedition 25
- Expedition 26
- Expedition 27
- Expedition 28
- Expedition 29
- Expedition 3
- Expedition 30
- Expedition 31
- Expedition 32
- Expedition 33
- Expedition 34
- Expedition 35
- Expedition 36
- Expedition 37
- Expedition 38
- Expedition 39
- Expedition 4
- Expedition 40
- Expedition 41
- Expedition 42
- Expedition 43
- Expedition 44
- Expedition 45
- Expedition 46
- Expedition 47
- Expedition 48
- Expedition 49
- Expedition 5
- Expedition 50
- Expedition 51
- Expedition 52
- Expedition 53
- Expedition 54
- Expedition 55
- Expedition 56
- Expedition 57
- Expedition 58
- Expedition 59
- Expedition 6
- Expedition 60
- Expedition 61
- Expedition 62
- Expedition 63
- Expedition 64
- Expedition 65
- Expedition 7
- Expedition 8
- Expedition 9
- Expedition Venus
- Expendable launch system
- Experience Curiosity
- Experiment to Detect the Global EoR Signature
- Experimental Geodetic Payload
- Exploding head syndrome
- Exploitation film
- Exploration Flight Test-1
- Exploration Gateway Platform
- Exploration Ground Systems
- Exploration Systems Architecture Study
- Exploration of Io
- Exploration of Jupiter
- Exploration of Mars
- Exploration of Mercury
- Exploration of Neptune
- Exploration of Pluto
- Exploration of Saturn
- Exploration of Uranus
- Exploration of the Moon
- Explore Scientific
- Explorer 1
- Explorer 10
- Explorer 11
- Explorer 12
- Explorer 13
- Explorer 14
- Explorer 15
- Explorer 16
- Explorer 17
- Explorer 18
- Explorer 19
- Explorer 2
- Explorer 20
- Explorer 21
- Explorer 22
- Explorer 23
- Explorer 24
- Explorer 26
- Explorer 27
- Explorer 28
- Explorer 29
- Explorer 3
- Explorer 31
- Explorer 32
- Explorer 33
- Explorer 34
- Explorer 35
- Explorer 36
- Explorer 38
- Explorer 39
- Explorer 4
- Explorer 41
- Explorer 43
- Explorer 45
- Explorer 47
- Explorer 49
- Explorer 5
- Explorer 50
- Explorer 51
- Explorer 52
- Explorer 54
- Explorer 55
- Explorer 6
- Explorer 60
- Explorer 7
- Explorer 8
- Explorer 9
- Explorer of Enceladus and Titan
- Explorer-1 Prime
- Exploring the Earth and the Cosmos
- Explosion
- Expocode
- Exponerad
- Exposing Microorganisms in the Stratosphere
- Exposition Flyer
- Exposure (heights)
- Exposure assessment
- Exposure science
- Extant (TV series)
- Extended Duration Orbiter
- Extended Groth Strip
- Extended Net
- Extended X-ray absorption fine structure
- Extended supersymmetry
- Extended theories of gravity
- External Active Thermal Control System
- External stowage platform
- External vision system
- Extinct (2017 TV series)
- Extinct comet
- Extinct radionuclide
- Extinction (astronomy)
- Extinction Rebellion
- Extinction Rebellion Youth
- Extinction cross
- Extinction debt
- Extinction event
- Extra dimensions
- Extra-Terrestrial Exposure Law
- ExtraTERRORestrial Alien Encounter
- Extracellular polymeric substance
- Extragalactic astronomy
- Extragalactic background light
- Extragalactic cosmic ray
- Extragalactic planet
- Extraplanar gas
- Extrasolar Planets Encyclopaedia
- Extrasolar object
- Extraterrestrial (2014 film)
- Extraterrestrial (TV program)
- Extraterrestrial Civilizations
- Extraterrestrial Sample Curation Center
- Extraterrestrial atmosphere
- Extraterrestrial diamonds
- Extraterrestrial hypothesis
- Extraterrestrial intelligence
- Extraterrestrial life
- Extraterrestrial liquid water
- Extraterrestrial materials
- Extraterrestrial real estate
- Extraterrestrial sample curation
- Extraterrestrial sky
- Extraterrestrial vortex
- Extraterrestrials in fiction
- Extravehicular Mobility Unit
- Extravehicular activity
- Extremal black hole
- Extreme Ice Survey
- Extreme Measures (Star Trek: Deep Space Nine)
- Extreme Ultraviolet Explorer
- Extreme environment
- Extreme helium star
- Extreme mass ratio inspiral
- Extreme point (disambiguation)
- Extreme points of Central America
- Extreme points of Earth
- Extreme points of Eurasia
- Extreme points of North America
- Extreme points of South America
- Extreme points of the Arctic
- Extreme points of the Caribbean
- Extreme points of the Commonwealth of Nations
- Extreme trans-Neptunian object
- Extreme ultraviolet Imaging Telescope
- Extremely Large Telescope
- Extremely large telescope
- Extremes (novel)
- Extremes on Earth
- Extremophile
- Extremozyme
- Eye in the Sky (novel)
- Eye of Harmony
- Eye of Ra
- Eye of the Needle (Star Trek: Voyager)
- Eye tracking on the International Space Station
- Eye-D
- Eyeball planet
- Eyepiece
- Eyes Galaxies
- Eyesat-1
- Eyre Lacuna
- Ezinu (crater)
- Ezra Otis Kendall
- Ezra T. Newman
- E²
- Eärendil and Elwing
- Eóganacht Áine
- Eóganachta
- Eötvös (crater)
- Eötvös effect
- F Centauri
- F Cygni
- F Eridani
- F Hydrae
- F Orionis
- F Puppis
- F Velorum
- F region
- F(R) gravity
- F-1 (satellite)
- F-Zero
- F-Zero (video game)
- F-Zero Climax
- F-Zero GX
- F-Zero X
- F-Zero: GP Legend (video game)
- F-ratio
- F-term
- F-theory
- F-type asteroid
- F-type main-sequence star
- F. Drew Gaffney
- F. J. Duarte
- F. J. M. Stratton
- F. M. Busby
- F. Orlin Tremaine
- F. Richard Stephenson
- F. W. Harvey
- F.W. Clarke Medal
- F.lux
- F2 propagation
- F24 camera
- FACSAT-1
- FADEC
- FAI Gold Air Medal
- FAO soil classification
- FAST20XX
- FASTRAC
- FASTSAT
- FASat-Alfa
- FC Carl Zeiss Jena
- FC Kahuna
- FEDOR (robot)
- FESOM
- FF Andromedae
- FF Aquilae
- FG Sagittae
- FG-02
- FG-15
- FG-36
- FG-46
- FG-47
- FH Serpentis
- FIELDS
- FITS
- FK Comae Berenices
- FL Lyrae
- FLARM
- FLCL
- FLEX (satellite)
- FLTSATCOM-3
- FN Canis Majoris
- FNET
- FO Aquarii
- FOCAL (spacecraft)
- FORTE
- FOSI, Forum Sedimentologiwan Indonesia
- FOXSI Sounding Rocket
- FR-1 (satellite)
- FRB 180916.J0158+65
- FRW/CFT duality
- FS Canis Majoris
- FS Canis Majoris variable
- FSC 15307+3253
- FSR 1758
- FTL: Faster Than Light
- FTV-1126
- FTV-1132
- FTV-2203
- FU Orionis
- FU Orionis star
- FU Tauri
- FUNcube-1
- Fabbroni (crater)
- Faber–Jackson relation
- Fabian Gottlieb von Bellingshausen
- Fabian Lenz
- Fabibacter pacificus
- Fabio (DJ)
- Fabio Pacucci
- Fabio Zerpa
- Fabra Observatory
- Fabric (club)
- Fabricius (crater)
- Fabrizio Bernardi
- Fabry (crater)
- Fabry–Pérot interferometer
- Face control
- Face on Moon South Pole
- Faces of Death
- Faces of Death II
- Faces of Death III
- Faces of Death IV
- Faces of Death V
- Faces of Death VI
- Facial disc
- Facility for Airborne Atmospheric Measurements
- Facing Future (Organization)
- Factions of Halo
- Facula
- Faculty of Astrological Studies
- Faculty of Earth Sciences, King Abdulaziz University
- Faculty of Geodesy and Land Management of the University of Warmia and Mazury in Olsztyn
- Faculty of Geodesy, University of Zagreb
- Faerie (DC Comics)
- Fahlband
- Fahrenheit (crater)
- Failed supernova
- Failure Is Not an Option
- Faint Images of the Radio Sky at Twenty-Centimeters
- Faint Object Camera
- Faint Object Spectrograph
- Faint blue galaxy
- Faint young Sun paradox
- Fairbanks Museum and Planetarium
- Fairchild K-20
- Fairy circle (arid grass formation)
- Faith (meteorite)
- Faith Vilas
- Faizrakhmanist
- Fajr (satellite)
- Fakhr al-Din al-Razi
- Falacer
- Falco Lombardi
- Falcon 9 first-stage landing tests
- Falcon 9 flight 10
- Falcon 9 flight 20
- Falcon 9 flight 26
- Falcon 9 prototypes
- Falcon Heavy test flight
- FalconSAT
- FalconSAT-2
- Falcons of Narabedla
- Falk Herwig
- Falke (spacecraft)
- Fall line
- Fall line (topography)
- Fall prevention
- Fall protection
- Fallen Astronaut
- Falling (execution)
- Falling (sensation)
- Falling Onto Mars
- Falling Skies
- Falling Skies (season 1)
- Falling Skies (season 2)
- Falling Skies (season 3)
- Falling Skies (season 4)
- Falling Skies (season 5)
- Falling Water (TV series)
- Fallout shelter
- Fallow Buck Inn
- Falls in older adults
- Fallstreak hole
- Fallturm Bremen
- False awakening
- False vacuum
- Falsion
- Falstaff (rocket)
- Family Portrait (MESSENGER)
- Family Portrait (Voyager)
- Family symmetries
- Fan Mountain Observatory
- Fan death
- Fanaroff–Riley classification
- Fand Mons
- Fang Lizhi
- Fangyan Formation
- Fanhui Shi Weixing
- Fanny Hill (1968 film)
- Fantasmic!
- Fantastic Fireworks
- Fantastic Planet
- Fantasy Bedtime Hour
- Fantasy in the Sky
- Fanuankuwel
- Far 3 kpc Arm
- Far Cry 5
- Far Gate
- Far Out Space Nuts
- Far Ultraviolet Camera/Spectrograph
- Far Ultraviolet Spectroscopic Explorer
- Far side of the Moon
- Far-infrared Outgoing Radiation Understanding and Monitoring
- Far-infrared astronomy
- FarFarOut
- Faraday (crater)
- Faraday cup
- Faraday effect
- Farah Alibay
- Farah Mendlesohn
- Faramir Colles
- Farbauti (moon)
- Farcaster
- Farewell Fantastic Venus
- Farewell to the Master
- Fargam
- Fargo (season 2)
- Farhana Sultana
- Farim (crater)
- Farinelli and the King
- Farley–Buneman instability
- Farm Cove Observatory
- Farm Forestry Toolbox
- Farmer in the Sky
- Farnese Atlas
- Farnham Astronomical Society
- Farouk El-Baz
- Farpoint (video game)
- Farpoint Observatory
- Farscape
- Farside Cannon
- Farzana Dua Elahe
- Fashion Monster
- Fasli calendar
- Fast Auroral Snapshot Explorer
- Fast Data eXchange
- Fast Infrared Exoplanet Spectroscopy Survey Explorer
- Fast Low-Ionization Emission Region
- Fast Sulphon Black F
- Fast blue optical transient
- Fast ice
- Fast inverse square root
- Fast radio burst
- Faster-than-light
- Faster-than-light neutrino anomaly
- Fasti
- Fasti (poem)
- Fasti Antiates Maiores
- Fasti Capitolini
- Fasti Ostienses
- Fasti Potentini
- Fasti Triumphales
- Fasti vindobonenses
- Fat Cat, Norwich
- Fat Guy Stuck in Internet
- Fat Old Sun
- Fatal Frame: Mask of the Lunar Eclipse
- Fatal insomnia
- Fathers & Suns
- Fathom Five National Marine Park
- Fati (god)
- Fatih Ozmen
- Fatin Gökmen
- Fatoumata Kébé
- Faucet Inn
- Faulkes Telescope North
- Faulkes Telescope Project
- Faulkes Telescope South
- Faulkner (crater)
- Fault breccia
- Fault gouge
- Faustini (crater)
- Fauth (crater)
- Faye (crater)
- Fayet–Iliopoulos D-term
- Fe, Fi, Fo, Fum, and Phooey
- Fear, Itself
- Fearful Pranks Ensue
- Fearful owl
- Fearless (Pink Floyd song)
- Fearless Photog
- Feature data
- Febarbamate
- Februarius
- Fech fech
- Fechner (crater)
- FedSat
- Fedde Le Grand
- Federal Building (Colorado Springs, Colorado)
- Federal Express (train)
- Federal Institute for Geosciences and Natural Resources
- Federation (novel)
- Federation of Analytical Chemistry and Spectroscopy Societies
- Federation of Astronomical Societies
- Federation of Damanhur
- Federation of Earth Science Information Partners
- Federation of Free Traders
- Fedorov (crater)
- Feeder bluff
- Feersum Endjinn
- Feet of Clay (novel)
- Fei Junlong
- Feia Lacus
- Feige 55
- Feinstein's/54 Below
- Feitian space suit
- Felguk
- Felicia Day
- Felicity (film)
- Felicity Aston
- Felicjan Kępiński
- Felis (constellation)
- Felisa Wolfe-Simon
- Felix A. Aharonian
- Felix Andries Vening Meinesz
- Felix Baumgartner
- Felix Chayes Prize
- Felix Hormuth
- Felix Pirani
- Felix Ziegel
- Felix da Housecat
- Fell
- Fellfield
- Fellgett's advantage
- Felsite
- Female Convict Scorpion: Beast Stable
- Female Prisoner Scorpion: 701's Grudge Song
- Female Prisoner: Cage
- Female Vampire
- Femme nue dormant au bord de l'eau
- Femtochemistry
- Fen
- Fen-meadow
- Fena: Pirate Princess
- Fenadiazole
- Fenagh (crater)
- Fenambosy Chevron
- Fengjia Night Market
- Fengyun
- Fengyun 2-05
- Fengyun 2-07
- Fennia (journal)
- Fenrir (moon)
- Fenton's reagent
- Feodosy Krasovsky
- Feoktistov (crater)
- Feralia Planitia
- Ferber method
- Ferdinand (moon)
- Ferdinand Augustin Hallerstein
- Ferdinand Joseph Schmidt
- Ferdinand Magellan
- Ferdinand Rudolph Hassler
- Ferdinand von Wrangel
- Ferenc Pavlics
- Feretrius
- Fergie (DJ)
- Ferguson landslide
- Ferhan Çeçen
- Ferhat Ozcep
- Feriale Duranum
- Fermat (crater)
- Fermat's and energy variation principles in field theory
- Fermi (crater)
- Fermi Gamma-ray Space Telescope
- Fermi acceleration
- Fermi and Frost
- Fermi ball
- Fermi glow
- Fermi paradox
- Fermi resonance
- Fermi–Walker transport
- Fernand Courty
- Fernand Rigaux
- Fernando Pedichini
- Fernando Villaamil
- Fernbank Observatory
- Fernbank Science Center
- Fernelius (crater)
- Ferrallitisation
- Ferranti Argus
- Ferret Data Visualization and Analysis
- Ferricrete
- Ferrimicrobium acidiphilum
- Ferro meridian
- Ferrofluid
- Ferroglobus
- Ferromagnetic resonance
- Ferromanganese nodules
- Ferroplasma
- Ferroplasma acidiphilum
- Ferroplasmaceae
- Ferry Corsten
- Fersman (crater)
- Fertile Crescent
- Fervidicoccus
- Feryal Özel
- Fesenkov (Martian crater)
- Fesenkov (lunar crater)
- Fesenkov Astrophysical Institute
- Festa del Redentore
- Festungsfront Oder-Warthe-Bogen
- Fet (crater)
- Fetish club
- Feuillée (crater)
- Feynman's Lost Lecture
- Fiammetta Wilson
- Fiasco (novel)
- Fiber Bragg grating
- Fiber roll
- Fiber-optic Improved Next-generation Doppler Search for Exo-Earths
- Fibersat
- Fibiger (crater)
- Fibre multi-object spectrograph
- Fibrous root system
- Fick Observatory
- Fiction featuring Merlin
- Fictional planets of the Solar System
- Fictional universe of Avatar
- Fiebre (film)
- Field Trip (application)
- Field capacity
- Field galaxy
- Field guide
- Field of Streams
- Field of regard
- Field propulsion
- Field-aligned irregularity
- Field-reversed configuration
- Fife Symington
- Fifth Cambridge Survey of Radio Sources
- Fifth Planet (novel)
- Fifth planet (hypothetical)
- Fifth principal meridian
- Fifty Shades of Black
- Fight for Your Life
- Fighters from Mars
- Figure of the Earth
- Figure-ground (cartography)
- Filar micrometer
- Filip Hjulström
- Filipino names in space
- Filippo Ferrari
- Filippo Salviati
- Fill dirt
- Film Forum
- Film Guild Cinema
- Film Streams
- Film society
- Filmstaden (cinema chain)
- Filo & Peri
- Filter fluorometer
- Filter strip
- Fimbulthul stream
- Final Countdown (video game)
- Final Doom
- Final Exam (1981 film)
- Final Fantasy IV
- Final Fantasy XIV
- Final Fantasy: The Spirits Within
- Final Space
- Finale (Smallville)
- Financial astrology
- Find My Friends
- Finderscope
- Finding Merlin
- Finding Nemo Submarine Voyage
- Finding of Moses
- Fine Gold Intrusive Suite
- Fine Guidance Sensor (HST)
- Fine Guidance Sensor and Near Infrared Imager and Slitless Spectrograph
- Fine guidance sensor
- Fine-Resolution Epithermal Neutron Detector
- Fine-tuned universe
- Finished (short story)
- Finisterre universe
- Finite Volume Community Ocean Model
- Finite element machine
- Finite water-content vadose zone flow method
- Finity's End
- Finley Duncan
- Finnegans Wake
- Finnis souterrain
- Finnish Geodetic Institute
- Finnish Meteorological Institute
- Finsch (crater)
- Finsen (crater)
- Fiona A. Harrison
- Fiona Kelleghan
- Fiorella Terenzi
- Firdousi (crater)
- Fire (Kasabian song)
- Fire (classical element)
- Fire (wuxing)
- Fire Eagle
- Fire Maidens from Outer Space
- Fire Season
- Fire and brimstone
- Fire in ancient Iranian culture
- Fire in the Sky
- Fire rock
- Fire temple
- Fire urgency estimator in geosynchronous orbit
- Fire worship
- Fireball XL5
- Firecracker
- Firecracker welding
- Firefly
- Firefly (TV series)
- Firefly (franchise)
- Firefly Aerospace
- Firehose instability
- Firewall (physics)
- Firework Code
- Fireworks
- Fireworks (magazine)
- Fireworks Regulations 2004
- Fireworks bans in China
- Fireworks by Grucci
- Fireworks competitions
- Fireworks law in the United Kingdom
- Fireworks policy in Belgium
- Fireworks policy in the European Union
- Fireworks policy in the Netherlands
- Fireworks policy in the United States
- Firkin Brewery
- Firmament
- Firmicus (crater)
- Firn
- Firouz Naderi
- Firsoff (Martian crater)
- Firsov (crater)
- First Cambridge Catalogue of Radio Sources
- First Contact (Star Trek: The Next Generation)
- First Contact (novelette)
- First Contact?
- First Council of Braga
- First Dutch Expedition to Nusantara
- First Expedition
- First Landing
- First Lensman
- First Light (Preston book)
- First Lunar Outpost
- First Man (film)
- First Man: The Life of Neil A. Armstrong
- First Men in the Moon (1964 film)
- First Men to the Moon
- First Orbit
- First Point of Aries
- First State (DJ)
- First Wave (TV series)
- First and Only (novel)
- First appearance datum
- First contact (science fiction)
- First flush
- First light (astronomy)
- First observation of gravitational waves
- First on the Moon
- First on the Moon (Armstrong, Collins, and Aldrin book)
- First principal meridian
- First to the Moon: The Journey of Apollo 8
- First-magnitude star
- Firstborn (Clarke and Baxter novel)
- Firstborn (Star Trek: The Next Generation)
- Fischer (crater)
- Fischler–Susskind mechanism
- Fish Go Deep
- Fish kill
- Fish owl
- Fish sting
- FishCenter Live
- Fishery Bulletin
- Fishing owl
- Fiske Planetarium
- Fissility (geology)
- Fission Product Pilot Plant
- Fitnah (crater)
- FitzGerald (crater)
- FitzGerald dynasty
- Fitzroy Tavern
- Five Against Venus
- Five All Night, Live All Night
- Five Billion Years of Solitude
- Five Chariots
- Five College Radio Astronomy Observatory
- Five Eyes Air Force Interoperability Council
- Five Mile House, Duntisbourne Abbots
- Five Suns
- Five on the Black Hand Side
- Five-hundred-meter Aperture Spherical Telescope
- Five-planet Nice model
- Five-pointed star
- Fixed sign
- Fixed stars
- Fixed-point ocean observatory
- Fizeau (crater)
- Fizeau interferometer
- Fjord
- Flack parameter
- Flag (crater)
- Flag and coat of arms of Johor
- Flag and coat of arms of Kelantan
- Flag and coat of arms of Moldavia
- Flag and coat of arms of Negeri Sembilan
- Flag and coat of arms of Selangor
- Flag and coat of arms of Terengganu
- Flag and seal of Illinois
- Flag and seal of New Hampshire
- Flag of Earth
- Flag of Mars
- Flag of Sioux Falls, South Dakota
- Flag of the United States Space Force
- Flaiano (crater)
- Flame Nebula
- Flame rectification
- Flame structure
- Flaming (song)
- Flaming chalice
- Flaming sword (mythology)
- Flamingo (train)
- Flammarion (Martian crater)
- Flammarion (lunar crater)
- Flammulated owl
- Flamsteed (crater)
- Flamsteed designation
- Flanders Marine Institute
- Flandrau Science Center and Planetarium
- Flandrian interglacial
- Flare star
- Flarestar Observatory
- Flark
- Flaser bed
- Flash (Queen song)
- Flash (lake)
- Flash Gordon
- Flash Gordon & the Warriors of Mongo
- Flash Gordon (1954 TV series)
- Flash Gordon (1996 TV series)
- Flash Gordon (2007 TV series)
- Flash Gordon (film)
- Flash Gordon (pinball)
- Flash Gordon (serial)
- Flash Gordon (soundtrack)
- Flash Gordon (video game)
- Flash Gordon Classic
- Flash Gordon Conquers the Universe
- Flash Gordon Strange Adventure Magazine
- Flash Gordon's Trip to Mars
- Flash Gordon: The Greatest Adventure of All
- Flash flood
- Flash flood guidance system
- Flash photolysis
- Flashback (1992 video game)
- Flashline Mars Arctic Research Station
- Flashtube
- Flat (landform)
- Flat Earth
- Flat Earth FC
- Flat cat
- Flat coast
- Flat-field correction
- Flatlander (short story)
- Flatline (B.o.B song)
- Flatness (cosmology)
- Flatness problem
- Flatspace
- Flattening
- Flatwood
- Flatwoods monster
- Flaubert (crater)
- Flaugergues (crater)
- Flavobacterium psychrophilum
- Flavour (particle physics)
- Flaxman crater
- Fleece Hotel
- Fleet Science Center
- Fleet Survey Team
- Fleet telematics system
- FleetBroadband
- Fleischmann Planetarium & Science Center
- Fleming (crater)
- Fleming 1
- Flensburg radar detector
- Flesh Gordon
- Flesh Gordon Meets the Cosmic Cheerleaders
- Fletcher Watson
- Fleur de Lys, St Albans
- Flex temp
- FlexCraft
- Flexible path
- Flick (physics)
- Flight Research Laboratory
- Flight controller
- Flight director (aeronautics)
- Flight dynamics
- Flight dynamics (fixed-wing aircraft)
- Flight dynamics (spacecraft)
- Flight envelope protection
- Flight management system
- Flight on Titan
- Flight qualification
- Flight recorder
- Flight spare
- Flight test
- Flight to Mars (film)
- Flight traffic mapping
- FlipOut!
- Flipped SU(5)
- Floating (The Moody Blues song)
- Floating cities and islands in fiction
- Floating collimator
- Floating landing platform
- Floc (biofilm)
- Flocculent spiral galaxy
- Flock-1
- Flood
- Flood (Halo)
- Flood Studies Report
- Flood barrier
- Flood basalt
- Flood bypass
- Flood forecasting
- Flood opening
- Flood stage
- Flood warning
- Flooded grasslands and savannas
- Floodgate
- Floodplain
- Flop-transition
- Flora Hiperspectral
- Flora family
- Florence Cathedral
- Florence Gschwend
- Florence Shirley Patterson Jones
- Florence Taylor Hildred
- Florence meridian
- Florensky (crater)
- Florentine calendar
- Flores scops owl
- Florey (crater)
- Florian Goebel
- Florica Topârceanu
- Florida Environmental Research Institute
- Florida Space Institute
- Florida Space Research Institute
- Florida Studio Theatre
- Florida Theatre
- Floréal
- Flotilla (video game)
- Flotsam, jetsam, lagan and derelict
- Flow tracer
- Flow-following, finite-volume Icosahedral Model
- Flower and Snake
- Flower of Kent
- Flowerpot technique
- Flownet
- Flubromazepam
- Fluctuation X-ray scattering
- Fludiazepam
- Flue-gas stack
- Fluence response
- Fluid Science Laboratory
- Fluid conductance
- Fluid flow through porous media
- Fluid solution
- Fluid thread breakup
- Flula Borg
- Fluorescence
- Fluorescence correlation spectroscopy
- Fluorescence cross-correlation spectroscopy
- Fluorescence image-guided surgery
- Fluorescence intermittency
- Fluorescence microscope
- Fluorescence recovery after photobleaching
- Fluorescence spectroscopy
- Fluorescent lamp
- Fluorescent lamps and health
- Fluorescent-lamp formats
- Fluorometer
- Fluoromethane
- Fluppy Dogs
- Flurazepam
- Flute (glacial)
- Fluting (geology)
- Fluvial landforms of streams
- Fluvial processes
- Fluvio-glacial
- Fluvio-thermal erosion
- Fluvioglacial landform
- Fluvisol
- Flux (novel)
- Flux loop
- Flux transfer event
- Flux tube
- Flux-cored arc welding
- Fly Me
- Fly Me to the Moon
- Fly Me to the Moon (film)
- Flyby (spaceflight)
- Flyby anomaly
- Flyby of Io with Repeat Encounters
- Flying (Beatles instrumental)
- Flying Disc Man from Mars
- Flying Horse Inn
- Flying Saucer Rock'n'Roll
- Flying Saucers (attraction)
- Flying Saucers from Outer Space
- Flying Scotsman, Kings Cross
- Flying and gliding animals
- Flying primate hypothesis
- Flying river
- Flying saucer
- Flying serpent (asterism)
- Flynn Creek crater
- Fnatic
- Foamhenge
- Fobos-Grunt
- Focal-plane array (radio astronomy)
- Focas (Martian crater)
- Focas (lunar crater)
- Focus Corporation
- Foe (unit)
- Foelsche crater
- Fog bow
- Fog collection
- Fogtrein
- Foil (song)
- Fokker Technologies
- Fold (geology)
- Fold and thrust belt
- Folies Bergère
- Follow Me (Muse song)
- Follow That Dream (song)
- Follow the Drinkin' Gourd
- Fomalhaut
- Fomalhaut C
- Fomalhaut b
- Fomalhaut in fiction
- Fon creation myth
- Fontana (Martian crater)
- Fontana (lunar crater)
- Fontanelle cemetery
- Fontenelle (crater)
- Fonteyn (crater)
- Foo fighter
- Food & Fuel Pubs
- Food chain
- Food for the Gods
- Footfall
- Foothill Observatory
- Footprint (satellite)
- Footprints on the Moon (1969 film)
- For All Mankind
- For All Mankind (TV series)
- For All Moonkind
- For the Emperor (novel)
- For the Man Who Has Everything
- For the World Is Hollow and I Have Touched the Sky
- Forbidden Planet
- Forbidden World
- Forbidden mechanism
- Forbush decrease
- Forcarei Astronomical Observatory
- Force field (fiction)
- Force spectroscopy
- Force-free magnetic field
- Forced Alliance
- Forced Entry (1973 film)
- Forces of Nature (TV series)
- Ford Insomnia Response to Stress Test
- Ford Observatory
- Ford Prefect (character)
- Forebulge
- Foredune
- Foreigner universe
- Forel-Ule scale
- Forensic astronomy
- Forensic geology
- Forensic palynology
- Forerunner (DC Comics)
- Foreset bed
- Forest Ray Moulton
- Forest floor
- Forest floor interception
- Forever Autumn (novel)
- Forge (level editor)
- Forge of Heaven
- Forgotten Freshness Volume 4
- Formation and evolution of the Solar System
- Formation fluid
- Former constellation
- Forming gas
- Formosat-1
- Formosat-2
- Formosat-5
- Fornax
- Fornax Cluster
- Fornax Dwarf
- Fornax Wall
- Fornax in Chinese astronomy
- Fornjot (moon)
- Foros (crater)
- Forrest J Ackerman
- Forrest S. Petersen
- Forsaken (2018 film)
- Forschungsflugkörper
- Forschungszentrum Jülich
- Fort Armstrong Theatre
- Fort Night
- Fort St George In England
- Fort Worth Museum of Science and History
- Forth & Clyde Hotel
- Fortress 2: Re-Entry
- Fortress of Solitude
- Fortunian
- Forty Thousand in Gehenna
- Fossa (planetary nomenclature)
- Fossil (novel)
- Fossil Record
- Fossil hash
- Fossil preparation
- Fossil stellar magnetic field
- Fossil water
- Fossombrone Cathedral
- Foster (crater)
- Fotla Corona
- Foton (satellite)
- Foton-M No.1
- Foton-M No.2
- Foton-M No.4
- Foucault (crater)
- Foucault knife-edge test
- Fougèrite
- Foundered strata
- Four Advisors
- Four Dimensions of Greta
- Four Moons of Darkover
- Four Pillars of Destiny
- Four Rooms
- Four Symbols
- Four continents
- Four corners of the world
- Four-poster bed
- Four-stage-to-orbit
- Four-tensor
- Fourier (crater)
- Fourier-transform infrared spectroscopy
- Fourier-transform spectroscopy
- Fournier (crater)
- Fourth Cambridge Survey
- Fourth International Posadist
- Fourth principal meridian
- Fowler (crater)
- Fox (crater)
- Fox Bruin Theater
- Fox Fur Nebula
- Fox McCloud
- Fox Oakland Theatre
- Fox Park Public Observatory
- Fox Theater, Westwood Village
- Fox Theatre (Atlanta)
- Fox Theatre (Detroit)
- Fox Theatre (Fullerton, California)
- Fox Theatre (San Francisco)
- Fox Theatre (St. Louis)
- Fox Theatres
- Fox and Anchor
- Fox and Grapes, Birmingham
- Fox and Pheasant
- Fox-1A
- Fox-1B
- Fox-1Cliff
- Fox-1D
- Foxy Brown (film)
- Fra Mauro (crater)
- Fra Mauro formation
- Fracastorius (crater)
- Fractal cosmology
- Fractal in soil mechanics
- Fractional Orbital Bombardment System
- Fractionated spacecraft
- Fragipan
- Fram (crater)
- Framboid
- Frame fields in general relativity
- Frame of reference
- Frame-dragging
- Fran Bošnjaković
- Fran Cosgrave
- France A. Córdova
- Frances Bagenal
- Frances Barkley
- Frances Faye
- Frances Hurwitz
- Frances Langford
- Frances Lowater
- Frances Northcutt
- Francesco Barozzi
- Francesco Bertelli
- Francesco Bianchini
- Francesco Capuano Di Manfredonia
- Francesco Carlini
- Francesco Denza
- Francesco Fontana
- Francesco Manca
- Francesco Maria Grimaldi
- Francesco Sambiasi
- Francesco Sizzi
- Francesco de Vico
- Franciade
- Francis Abbott
- Francis Alfred Cooper
- Francis Barker & Son
- Francis Charles McMath
- Francis Chichester
- Francis Crick
- Francis Drake
- Francis Dunnell
- Francis F. Chen
- Francis Fletcher (priest)
- Francis G. Pease
- Francis Graham-Smith
- Francis Grasso
- Francis Inge
- Francis Marion University Observatory
- Francis Mugliston
- Francis Nimmo
- Francis Penrose
- Francis Preserved Leavenworth
- Francis Roberts (cricketer)
- Francisca Oboh Ikuenobe
- Francisco (moon)
- Francisco Rubio (astronaut)
- Franciszek Armiński
- Franck (crater)
- Franck Marchis
- Franck–Condon principle
- Franco Brambilla (illustrator)
- Franco Malerba
- Franco Pacini
- Franco Rasetti
- Francois Safieddine
- Frangible nut
- Frank Arthur Bellamy
- Frank B. McDonald
- Frank B. Zoltowski
- Frank Bateson
- Frank Borman
- Frank Bradshaw Wood
- Frank Brunner
- Frank De Winne
- Frank Drake
- Frank Edwards (writer and broadcaster)
- Frank Elmore Ross
- Frank Frazetta
- Frank Hagar Bigelow
- Frank Hall (broadcaster)
- Frank Herbert's Dune (video game)
- Frank Hill (scientist)
- Frank Hope-Jones
- Frank J. Low
- Frank J. Tipler
- Frank John Kerr
- Frank K. Edmondson
- Frank Kameny
- Frank L. Culbertson Jr.
- Frank Malina
- Frank McClean
- Frank Muller (astronomer)
- Frank Parkhurst Brackett
- Frank Pattyn
- Frank Phillips (cricketer)
- Frank Pieter Israel
- Frank Press
- Frank R. Paul
- Frank Schlesinger
- Frank Scott Hogg
- Frank Scully
- Frank Shu
- Frank Skjellerup
- Frank T. M. White
- Frank Walls
- Frank Washington Very
- Frank Winkler
- Frank Wu (artist)
- Frankenhooker
- Frankenstein Meets the Space Monster
- Frankie Bones
- Frankie Knuckles
- Franklin (crater)
- Franklin Chang Díaz
- Franklin E. Roach
- Franklin Institute
- Franklin J. Schaffner
- Franklin Ruehl
- Frano Kršinić (biologist)
- Frans Pretorius
- Frans Tengnagel
- František Nušl
- Franz (crater)
- Franz Boll (philologist)
- Franz Brünnow
- Franz Daniel Kahn
- Franz Halberg
- Franz Joseph (artist)
- Franz Kaiser
- Franz Rottensteiner
- Franz Viehböck
- Franz Xaver von Zach
- Franz de Paula Triesnecker
- Franz von Gruithuisen
- François Bouchet
- François Bourgeon
- François Folie
- François Forget
- François Gonnessiat
- François J. Terby
- François Wesemael
- Françoise Combes
- Françoise Gasse
- Frasca International
- Frascati Tokamak Upgrade
- Fraser Lowland
- Frauengefängnis
- Fraunhofer (crater)
- Fraunhofer diffraction
- Fraunhofer diffraction equation
- Fraunhofer distance
- Fraunhofer lines
- Frazil ice
- Freaky Deaky Music Festival
- Fred 2: Night of the Living Fred
- Fred Adams
- Fred Buck
- Fred Espenak
- Fred Ford (programmer)
- Fred Haise
- Fred Hoyle
- Fred Lawrence Whipple
- Fred Lawrence Whipple Observatory
- Fred M. Wilcox (director)
- Fred Moore (soldier)
- Fred Patten
- Fred Singer
- Fred W. Turek
- Fred Watson
- Fred the Godson
- Freddy Bastone
- Freddy Krueger
- Frede (cabaret manager)
- Frederica Perera
- Frederick Ackerley
- Frederick Atwood Greeley
- Frederick Brundrett
- Frederick C. Durant
- Frederick C. Leonard
- Frederick D. Gregory
- Frederick G. Keyes
- Frederick Hanley Seares
- Frederick Hauck
- Frederick James Hargreaves
- Frederick Larson (filmmaker)
- Frederick Lugard, 1st Baron Lugard
- Frederick Pilcher
- Frederick Simpson (historian)
- Frederick Slocum
- Frederick Sumner Brackett
- Frederick Turner (poet)
- Frederick W. Leslie
- Frederick W. Sturckow
- Frederick de Houtman
- Frederik Kaiser
- Frederik Pohl
- Fredholm (crater)
- Fredric Jameson
- Fredrik Johan Wiik
- Free Amazons of Darkover
- Free Four
- Free drift
- Free fall
- Free streaming
- Free, White and 21
- Free-air gravity anomaly
- Free-fall time
- Free-return trajectory
- Free-running sleep
- Free-space optical communication
- FreeFlyer
- FreeSpace 2
- Freedom Planet
- Freedom Project
- Freelancer (video game)
- Freeman Dyson
- Freeman law
- Freenex
- Freestar experiment
- Freeway (1996 film)
- Freeway II: Confessions of a Trickbaby
- Freeze-dried ice cream
- Fregat
- Frege's puzzles
- Freimut Börngen
- Freja (satellite)
- Fremen
- French Geodesic Mission
- French Geodesic Mission to Lapland
- French Republican calendar
- French ship Monge
- French space program
- Frento Vallis
- Frequency (gene)
- Frequency comb
- Frequency domain sensor
- Frequency separation
- Frequency-Agile Solar Radiotelescope
- Frequent flyer program (Guantanamo)
- Fresh water
- Freshet
- Freshwater acidification
- Freshwater ecosystem
- Freshwater environmental quality parameters
- Freshwater marsh
- Fresnel (unit)
- Fresnel Imager
- Fresnel diffraction
- Fresnel equations
- Fresnel number
- Fresnel rhomb
- Fresnel zone
- Fresnel–Arago laws
- Fresno scraper
- Fretted terrain
- Freud (crater)
- Freundlich (crater)
- Freund–Rubin compactification
- Friability
- Frida Palmer
- Friday Foster (film)
- Friday Night! with Ralph Benmergui
- Friday the 13th: Killer Puzzle
- Fridman (crater)
- Fried Egg structure
- Fried parameter
- Friede
- Friedmann Prize
- Friedmann equations
- Friedmann–Lemaître–Robertson–Walker metric
- Friedrich August Theodor Winnecke
- Friedrich Bernhard Gottfried Nicolai
- Friedrich Bessel
- Friedrich Georg Wilhelm von Struve
- Friedrich Hayn
- Friedrich Karl Arnold Schwassmann
- Friedrich Karl Ginzel
- Friedrich Schmiedl
- Friedrich Simon Archenhold
- Friedrich Tietjen
- Friedrich Wilhelm Argelander
- Friedrich Wilhelm Opelt
- Friedrich Zander
- Friedrich von Hahn
- Friedrich-Karl Thielemann
- Friendly Floatees
- Friends (1971 film)
- Friends of Amateur Rocketry
- Frigg
- Fright Nights
- Fright to the Finish
- Frightful Cave
- Frimaire
- Frisky Dingo
- Fritz Cohn
- Fritz Goos
- Fritz Gosslau
- Fritz Grünbaum
- Fritz Lang
- Fritz Leiber
- Fritz Mueller
- Fritz Müller (glaciologist)
- Fritz Zwicky
- Fritz Zwicky Prize for Astrophysics and Cosmology
- Froelich (crater)
- From Eternity to Here
- From Fishing Hamlet To Red Planet
- From the Earth to the Moon
- From the Earth to the Moon (film)
- From the Earth to the Moon (miniseries)
- Front-end Robotics Enabling Near-term Demonstration
- Frontier (supercomputer)
- Frontier in Space
- Frontier: Elite II
- Frontier: First Encounters
- Frontiers in Ecology and the Environment
- Frontiers of Biogeography
- Frost (crater)
- Frost flower
- Frost flower (sea ice)
- Frost heaving
- Frost line
- Frost line (astrophysics)
- Frostbiter: Wrath of the Wendigo
- Frostwork
- Frosty Drew Observatory
- Frosty Leo Nebula
- Frozen orbit
- Frozen star (hypothetical star)
- Fructidor
- Fruit Flyer
- Fry and Leela's Big Fling
- Fryxell (crater)
- Fräulein Devil
- Frère Jacques
- Frédéric Sy
- Fuchs Medal
- Fuego (1969 film)
- Fugacity capacity
- Fuji (spacecraft)
- Fuji (train)
- Fuk Li
- Fukang meteorite
- Fulgurite
- Full Bars
- Full moon
- Full pond
- Full spectral imaging
- Full-sky Astrometric Mapping Explorer
- Fulldome
- Fulldome Database
- Fuller (crater)
- Fuller's earth
- Fulmar (rocket)
- Fulvic acid
- Fulvio Melia
- Fumiaki Uto
- Fun (film)
- Fun Size
- Fun and Games (1971 film)
- Functional magnetic resonance spectroscopy of the brain
- Functional response
- Fund for UFO Research
- Fundamental Astronomy
- Fundamental ephemeris
- Fundamental plane (elliptical galaxies)
- Fundamental plane (spherical coordinates)
- Fundamental series
- Fundamental station
- Fundamentals of Stack Gas Dispersion
- Fundus (seabed)
- Fungal loop hypothesis
- Funginite
- Funkmaster Flex
- Funkstar De Luxe
- Funny Girls
- Furi
- Furipteridae
- Furnerius (crater)
- Furuhjelm 46
- Furuno
- Fury (DC Comics)
- Fury (Star Trek: Voyager)
- Furylfuramide
- Fusain
- Fusion (Eclipse Comics)
- Fusion energy gain factor
- Fusion power
- Fusion rocket
- Fusor
- Fusor (astronomy)
- Futabatei (crater)
- Futon
- Futon dryer
- Futurama (video game)
- Futurama: Into the Wild Green Yonder
- Futurama: Worlds of Tomorrow
- Future Combat Air System
- Future Echoes
- Future Launchers Preparatory Programme
- Future Tense (Star Trek: Enterprise)
- Future War 198X
- Future of Earth
- Future of Marine Animal Populations
- Future of an expanding universe
- Future of space exploration
- Future's End
- Futurians
- Fuwa
- Fuzion Frenzy 2
- Fuzzball (string theory)
- Fuzzy cold dark matter
- Fyodor Ivanovich Tolstoy
- Fyodor Luzhin
- Fyodor Yurchikhin
- Fábrica de Arte Cubano
- Fátima de Madrid
- Fédération Aéronautique Internationale
- Féerie (Moulin Rouge)
- Félicette
- Félix Aguilar Observatory
- Félix Amiot
- Félix Soto Toro
- Félix de Roy
- Fényi (crater)
- Fêtes de Genève
- Földtani Közlöny
- Förster resonance energy transfer
- G 117-B15A
- G 185-32
- G 196-3
- G 240-72
- G 29-38
- G 9-38
- G 99-47
- G Aquarii
- G Carinae
- G Centauri
- G Scorpii
- G-Darius
- G-Nome
- G-Saviour
- G-force
- G-jitter
- G-strain
- G-type asteroid
- G-type main-sequence star
- G. Bond (crater)
- G. C. Anupama
- G. David Low
- G. David Tilman
- G. Evelyn Hutchinson Award
- G. Harry Stine
- G. K. Gilbert Award
- G. K. Warren Prize
- G. Michael Bancroft
- G. Michael Purdy
- G. Scott Hubbard
- G. Srinivasan (physicist)
- G. William Domhoff
- G.I. Joe: Retaliation
- G.O.R.A.
- G1.9+0.3
- G292.0+01.8
- G350.1-0.3
- GA Drilling
- GADGET
- GALEX
- GALEX Arecibo SDSS Survey
- GALLEX
- GAMA202627
- GAMESS (UK)
- GAMMA
- GCIRS 13E
- GCIRS 16SW
- GCIRS 7
- GCIRS 8*
- GCRT J1745−3009
- GCl 38
- GD 165
- GD 356
- GD 358
- GD 362
- GD 40
- GD 61
- GD 66
- GDC Observatory
- GEIPAN
- GEISA
- GEO Imaging Satellite
- GEO-LEO
- GEO-Mobile Radio Interface
- GEO600
- GEOBASE
- GEOS-3
- GEOStar
- GEOStar-1
- GEOStar-2
- GEOStar-3
- GEOVIA
- GEWI
- GF method
- GFAJ-1
- GG Tauri
- GGSE-1
- GHP formalism
- GIOVE
- GIS and hydrology
- GIScience & Remote Sensing
- GJ 1005
- GJ 1128
- GJ 1151
- GJ 1245
- GJ 3379
- GJ 3512
- GJ 357 d
- GJ 3991
- GJ 526
- GJ 625
- GJ 9827
- GK Persei
- GL Virginis
- GLIMPSE Project
- GLONASS
- GLONASS (first-generation satellites)
- GLONASS-K
- GLONASS-K2
- GME of Deutscher Wetterdienst
- GMOSAIC
- GN-108036
- GN-z11
- GNS Science
- GNSS applications
- GNSS augmentation
- GNSS enhancement
- GNSS positioning calculation
- GNSS reflectometry
- GNSS software-defined receiver
- GO Navigator
- GO Searcher
- GO-ESSP
- GOES 1
- GOES 10
- GOES 11
- GOES 12
- GOES 13
- GOES 14
- GOES 15
- GOES 2
- GOES 3
- GOES 4
- GOES 5
- GOES 6
- GOES 7
- GOES 8
- GOES 9
- GOES-16
- GOES-17
- GOES-G
- GOES-T
- GOES-U
- GOODS-N-774
- GP Andromedae
- GPHS-RTG
- GPS Block IIF
- GPS Block III
- GPS Block IIIF
- GPS Exchange Format
- GPS IIR-1
- GPS Week Number Rollover
- GPS aircraft tracking
- GPS buoy
- GPS drawing
- GPS for the visually impaired
- GPS in the earthmoving industry
- GPS intelligent buoys
- GPS meteorology
- GPS puck
- GPS satellite blocks
- GPS signals
- GPS tracking unit
- GPS watch
- GPS wildlife tracking
- GPS-aided GEO augmented navigation
- GPS2SMS
- GPSBabel
- GPS·C
- GQ Lupi
- GQ Lupi b
- GQ Muscae
- GQM-163 Coyote
- GR 8
- GR Andromedae
- GR Muscae
- GRACE and GRACE-FO
- GRAIL
- GRAIL MoonKAM
- GRAPES-3
- GRASS GIS
- GRB 000131
- GRB 011211
- GRB 020813
- GRB 030329
- GRB 031203
- GRB 050509B
- GRB 050709
- GRB 050904
- GRB 051221A
- GRB 060218
- GRB 060614
- GRB 060729
- GRB 070125
- GRB 070714B
- GRB 080319B
- GRB 080913
- GRB 080916C
- GRB 090423
- GRB 090429B
- GRB 100621A
- GRB 101225A
- GRB 110328A
- GRB 111209A
- GRB 130427A
- GRB 150101B
- GRB 160625B
- GRB 190114C
- GRB 790305b
- GRB 830801
- GRB 970228
- GRB 970508
- GRB 971214
- GRB 980425
- GRB 990123
- GREGOR Solar Telescope
- GRENOUILLE
- GRO J0422+32
- GRO J1655-40
- GRO J1719-24
- GROVER
- GRS 1124-683
- GRS 1915+105
- GRTensorII
- GRW +70 8247
- GS 2000+25
- GS formalism
- GSAT-1
- GSAT-10
- GSAT-11
- GSAT-12
- GSAT-14
- GSAT-15
- GSAT-16
- GSAT-17
- GSAT-18
- GSAT-19
- GSAT-2
- GSAT-20
- GSAT-29
- GSAT-3
- GSAT-30
- GSAT-31
- GSAT-4
- GSAT-5P
- GSAT-6A
- GSAT-7
- GSAT-7A
- GSAT-7R
- GSAT-8
- GSC 02620-00648
- GSC 02652-01324
- GSC 03089-00929
- GSC 03549-02811
- GSC 03949-00967
- GSI3D
- GSO projection
- GSSHA
- GU Piscium
- GU Piscium b
- GURPS Alpha Centauri
- GURPS Infinite Worlds
- GUSTO (telescope)
- GW 123.4-1.5
- GW Orionis
- GW151226
- GW170104
- GW170608
- GW170814
- GW170817
- GW190412
- GW190521
- GW190814
- GX 339-4
- GX Velorum
- GY Andromedae
- GYRO
- GZ Velorum
- Gabala Radar Station
- Gabriel Green
- Gabriel Köerner
- Gabriel Rothblatt
- Gabriela González
- Gabriele Cattani
- Gabrielle Harbowy
- Gabrielle Renaudot Flammarion
- Gacrux
- Gadomski (crater)
- Gaea (crater)
- Gaea trilogy
- Gaean Reach
- Gaetano Crocco
- Gaganyaan
- Gagarin (crater)
- Gagarin's Start
- Gagarin: First in Space
- Gaia (spacecraft)
- Gaia 1
- Gaia Archive
- Gaia Sausage
- Gaia hypothesis
- Gaia16aye
- Gaian Greens
- Gaiety Theater (Manila)
- Gailard Sartain
- Gainsborough (crater)
- Gaisser–Hillas function
- Gal (unit)
- Gal4 transcription factor
- Galactic Adventures
- Galactic Bridges and Tails
- Galactic Center
- Galactic Center GeV Excess
- Galactic Chase
- Galactic Civilizations
- Galactic Civilizations II: Dark Avatar
- Galactic Civilizations II: Dread Lords
- Galactic Civilizations II: Twilight of the Arnor
- Galactic Civilizations III
- Galactic Command
- Galactic Emission Mapping
- Galactic Empire (series)
- Galactic Energy
- Galactic Junk League
- Galactic Patrol
- Galactic Patrol (novel)
- Galactic Pot-Healer
- Galactic Radiation and Background
- Galactic Suite Design
- Galactic Trader
- Galactic Warrior Rats
- Galactic anticenter
- Galactic astronomy
- Galactic bulge
- Galactic coordinate system
- Galactic corona
- Galactic disc
- Galactic habitable zone
- Galactic halo
- Galactic orientation
- Galactic plane
- Galactic quadrant
- Galactic ridge
- Galactic superwind
- Galactic tide
- Galactic year
- Galactica 1980
- Galactocentric distance
- Galactocentrism
- Galactus Jack
- Galaga
- Galaga '88
- Galaga '91
- Galaga 30th Collection
- Galaga Legions
- Galaga Legions DX
- Galaga Remix
- Galaga: Destination Earth
- Galatea (moon)
- Galaxian
- Galaxian 2
- Galaxian3: Project Dragoon
- Galaxias Fossae
- Galaxies in fiction
- Galaxiki
- Galaxina
- Galaxius Mons
- Galaxy
- Galaxy (spacecraft)
- Galaxy (video game)
- Galaxy 1
- Galaxy 10R
- Galaxy 11
- Galaxy 15
- Galaxy 17
- Galaxy 18
- Galaxy 19
- Galaxy 23
- Galaxy 25
- Galaxy 26
- Galaxy 27
- Galaxy 28
- Galaxy 3C
- Galaxy 4R
- Galaxy 5
- Galaxy 9
- Galaxy And Mass Assembly survey
- Galaxy Cluster IDCS 1426
- Galaxy Express 999
- Galaxy Express Corporation
- Galaxy Force
- Galaxy Game
- Galaxy H-Alpha Fabry-Perot System
- Galaxy IV
- Galaxy Invader
- Galaxy On Fire 2
- Galaxy Quest
- Galaxy X (galaxy)
- Galaxy Zoo
- Galaxy cluster
- Galaxy color–magnitude diagram
- Galaxy filament
- Galaxy formation and evolution
- Galaxy group
- Galaxy groups and clusters
- Galaxy merger
- Galaxy morphological classification
- Galaxy of Fear
- Galaxy of Terror
- Galaxy rotation curve
- Galaxyland
- Galberos
- Galdakao (crater)
- Galdieria sulphuraria
- Gale (crater)
- Gale Bruno van Albada
- Galen (crater)
- Galenki RT-70 radio telescope
- Galician Massif
- Galilaei (Martian crater)
- Galilaei (lunar crater)
- Galilean invariance
- Galilean moons
- Galileo (satellite navigation)
- Galileo (spacecraft)
- Galileo Galilei
- Galileo Galilei Planetarium
- Galileo National Telescope
- Galileo Probe
- Galileo Regio
- Galileo affair
- Galileo's Daughter
- Galileo's Dream
- Galileo's Leaning Tower of Pisa experiment
- Galileo's escapement
- Galileo's paradox
- GalileoMobile
- Galileoscope
- Galina Khitrova
- Galle (Martian crater)
- Galle (lunar crater)
- Gallic epoch
- Gallifrey Macula
- Galloping Galaxies!
- Galloway Forest Park
- Gallus (constellation)
- Galois (crater)
- Gals (satellite)
- Galvani (crater)
- Gambart (crater)
- Gambian slit-faced bat
- Gambling with Souls
- Game Over II
- Game Show Models
- Gameplay of Eve Online
- Gamera vs. Guiron
- Gamera vs. Viras
- Gamera vs. Zigra
- Gamera: Super Monster
- Gamma (eclipse)
- Gamma (satellite)
- Gamma Andromedae
- Gamma Apodis
- Gamma Aquarii
- Gamma Aquilae
- Gamma Arae
- Gamma Arietis
- Gamma Boötis
- Gamma Caeli
- Gamma Camelopardalis
- Gamma Cancri
- Gamma Canis Majoris
- Gamma Canis Minoris
- Gamma Capricorni
- Gamma Cassiopeiae
- Gamma Cassiopeiae variable
- Gamma Centauri
- Gamma Cephei
- Gamma Cephei Ab
- Gamma Ceti
- Gamma Chamaeleontis
- Gamma Circini
- Gamma Columbae
- Gamma Comae Berenices
- Gamma Coronae Australis
- Gamma Coronae Borealis
- Gamma Corvi
- Gamma Crateris
- Gamma Cygni
- Gamma Delphini
- Gamma Doradus
- Gamma Draconis
- Gamma Equulei
- Gamma Eridani
- Gamma Fornacis
- Gamma Geminorum
- Gamma Gruis
- Gamma Herculis
- Gamma Horologii
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- Gamma spectroscopy
- Gamma-Hydroxyvaleric acid
- Gamma-Ray Burst Optical/Near-Infrared Detector
- Gamma-Ray Imaging Spectrometer
- Gamma-Valerolactone
- Gamma-ray Burst Coordinates Network
- Gamma-ray astronomy
- Gamma-ray burst
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- Gamma-ray burst precursor
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- Gamma-ray spectrometer
- Gamma1 Caeli
- Gamma1 Fornacis
- Gamma1 Normae
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- Gamma2 Normae
- Gamma2 Sagittarii
- Gammasphere
- Gamow (crater)
- Gan De
- Ganapathi Thanikaimoni
- Gancedo (meteorite)
- Gandahar (film)
- Gandang Gabi, Vice!
- Gandanta
- Ganesa Macula
- Ganesar Chanmugam
- Ganges Chasma
- Ganges Mensa
- Ganis Chasma
- Ganita-yukti-bhasa
- Ganja & Hess
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- Ganswindt (crater)
- Ganymede (moon)
- Ganymede City
- Gao Xing
- Gaocheng Astronomical Observatory
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- Garavito (crater)
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- Garden Theater
- Garden of Allah (cabaret)
- Garden pond
- Gardens of the Sun
- Gardner (crater)
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- Gardnos crater
- Gardon gauge
- Gareth Edwards (director)
- Gareth V. Williams
- Garfield's Halloween Adventure
- Garga Hora
- Garmin
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- Garni (crater)
- Garrett P. Serviss
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- Gart Westerhout
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- Gary A. Wegner
- Gary D.
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- Gas
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- Geology of Liechtenstein
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- Geology of Luxembourg
- Geology of Macau
- Geology of Madagascar
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- Geology of Mars
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- Geology of Mercury
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- Geology of Norway
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- Geology of Panama
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- Geology of Rwanda
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- Geology of San Marino
- Geology of Saudi Arabia
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- Geology of Seychelles
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- Geology of Taiwan
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- Geomagnetic Field Monitoring Program of SUPARCO
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- Giant GRB Ring
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- Gibbs (crater)
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- Giebichenstein
- Gienah
- Gifford Observatory
- Gifu City Science Museum
- Gigan
- Gigas Sulci
- Gijs Kuenen
- Gila and Salt River meridian
- Gilbert (Martian crater)
- Gilbert (lunar crater)
- Gilbert N. Lewis
- Gill (Martian crater)
- Gill (lunar crater)
- Gilles Chabrier
- Gilles Fontaine
- Gilles-François de Gottignies
- Gillham code
- Gillian Foulger
- Gillian R. Knapp
- Gillian Wratt
- Gillian Wright (astronomer)
- Gilligan's Planet
- Gilliland's Ranch
- Gilmour Space Technologies
- Gimbal lock
- Gina R. Poe
- Ginan (star)
- Ginga (satellite)
- Ginga (train)
- Ginger Kerrick
- Ginjer Buchanan
- Ginnungagap
- Ginrei
- Ginzburg–Landau theory
- Ginzel (crater)
- Gioiello (galaxy cluster)
- Gioja (crater)
- Giordano Bruno
- Giordano Bruno (crater)
- Giorgio A. Tsoukalos
- Giorgio Abetti
- Giorgio Coresio
- Giorgio de Santillana
- Giotto (crater)
- Giotto (spacecraft)
- Giovanna Tinetti
- Giovanni Amelino-Camelia
- Giovanni Antonelli
- Giovanni Antonio Amedeo Plana
- Giovanni Antonio Baranzano
- Giovanni Antonio Magini
- Giovanni Battista Agucchi
- Giovanni Battista Amici
- Giovanni Battista Audiffredi
- Giovanni Battista Baliani
- Giovanni Battista Donati
- Giovanni Battista Hodierna
- Giovanni Battista Lacchini
- Giovanni Battista Riccioli
- Giovanni Battista Zupi
- Giovanni Bianchini
- Giovanni Bignami
- Giovanni Boccardi (astronomer)
- Giovanni Ciampoli
- Giovanni Domenico Cassini
- Giovanni Domenico Maraldi
- Giovanni Dondi dell'Orologio
- Giovanni Fazio
- Giovanni Francesco Gemelli Careri
- Giovanni Francesco Sagredo
- Giovanni Francesco Zarbula
- Giovanni Inghirami
- Giovanni Jacopo Spada
- Giovanni Padovani
- Giovanni Sante Gaspero Santini
- Giovanni Schiaparelli
- Giovanni Sostero
- Giovanni de Galliano Pieroni
- Giovanni de Sanctis
- Girawali Observatory
- Gires–Tournois etalon
- Girl (Chinese constellation)
- Girl vs. Monster
- Girls in Prison (1994 film)
- Girolamo Manfredi
- Gish Bar Patera
- Gist (graphics software)
- Git Along!
- Gitaroo Man
- Giulio Alenio
- Giulio Magli
- Giulio Tononi
- Giuseppe Asclepi
- Giuseppe Biancani
- Giuseppe Bianchi (astronomer)
- Giuseppe Campani
- Giuseppe Cocconi
- Giuseppe Colombo Centre for Space Geodesy
- Giuseppe Forti
- Giuseppe Piazzi
- Giuseppina Aliverti
- Givatayim Observatory
- Give & Take (Red Dwarf)
- Gjon Gazulli
- Glacial River Warren
- Glacial boundary
- Glacial earthquake
- Glacial history of Minnesota
- Glacial motion
- Glacial period
- Glacial polish
- Glacial refugium
- Glacial relict
- Glacial stream
- Glacial survival hypothesis
- Glaciecola nitratireducens
- Glacier
- Glacier cave
- Glacier foreland
- Glacier growing
- Glacier head
- Glacier ice accumulation
- Glacier mass balance
- Glacier mice
- Glacier morphology
- Glacier terminus
- Glaciers on Mars
- Glacio-geological databases
- Glaciogenic Reservoir Analogue Studies Project
- Glaciolacustrine deposits
- Glaciology
- Glaciovolcanism
- Gladys Gale
- Gladys Vergara
- Gladys West
- Glaisher (crater)
- Glan–Foucault prism
- Glan–Taylor prism
- Glan–Thompson prism
- Glasford crater
- Glasgow Science Centre
- Glasgowman's Wrath
- Glashütte Observatory
- Glass cockpit
- Glass with embedded metal and sulfides
- Glasser effect
- Glasslands Gallery
- Glauber (crater)
- Glavkosmos
- Glazenap (crater)
- Gledhill (crater)
- Glee, Actually
- Glen
- Glen D. Riley Observatory
- Glen P. Wilson
- Glen or Glenda
- Glen's long-fingered bat
- Glenelg, Mars
- Glenn Dennis
- Glenn Research Center
- Glenn White
- Glennys Farrar
- Gleti
- Gleysol
- Gliese 1
- Gliese 1002
- Gliese 105
- Gliese 1061
- Gliese 1061 c
- Gliese 1061 d
- Gliese 1062
- Gliese 1132
- Gliese 1132 b
- Gliese 1214
- Gliese 1214 b
- Gliese 146
- Gliese 15 Ab
- Gliese 15 Ac
- Gliese 163
- Gliese 163 c
- Gliese 167
- Gliese 176
- Gliese 176 b
- Gliese 179
- Gliese 179 b
- Gliese 180
- Gliese 205
- Gliese 208
- Gliese 22
- Gliese 221
- Gliese 229
- Gliese 251
- Gliese 268
- Gliese 282
- Gliese 3021 b
- Gliese 317
- Gliese 317 b
- Gliese 318
- Gliese 3293
- Gliese 3470
- Gliese 3470 b
- Gliese 357
- Gliese 3634
- Gliese 3634 b
- Gliese 3685
- Gliese 393
- Gliese 402
- Gliese 408
- Gliese 412
- Gliese 42
- Gliese 422 b
- Gliese 433
- Gliese 436
- Gliese 436 b
- Gliese 445
- Gliese 49
- Gliese 504 b
- Gliese 521
- Gliese 536 b
- Gliese 54
- Gliese 555
- Gliese 570
- Gliese 581
- Gliese 581 planetary system
- Gliese 581b
- Gliese 581c
- Gliese 581d
- Gliese 581e
- Gliese 581g
- Gliese 588
- Gliese 623
- Gliese 638
- Gliese 649
- Gliese 649 b
- Gliese 667
- Gliese 667 Cb
- Gliese 667 Cc
- Gliese 673
- Gliese 674
- Gliese 674 b
- Gliese 676
- Gliese 682
- Gliese 682 c
- Gliese 686
- Gliese 687
- Gliese 69
- Gliese 693
- Gliese 710
- Gliese 752
- Gliese 754
- Gliese 758
- Gliese 758 B
- Gliese 777
- Gliese 777 b
- Gliese 777 c
- Gliese 784
- Gliese 806
- Gliese 809
- Gliese 829
- Gliese 832
- Gliese 832 b
- Gliese 832 c
- Gliese 849
- Gliese 849 b
- Gliese 86
- Gliese 86 b
- Gliese 876
- Gliese 876 b
- Gliese 876 c
- Gliese 876 d
- Gliese 876 e
- Gliese 877
- Gliese 880
- Gliese 908
- Gliese Catalogue of Nearby Stars
- Glikson crater
- Glinda the Good Witch
- Glinka (crater)
- GlobaLogix
- Global Atmosphere Watch
- Global Atmospheric Research Program
- Global Boundary Stratotype Section and Point
- Global Challenge Award
- Global Change Biology
- Global Change Master Directory
- Global Change Observation Mission
- Global Climate Observing System
- Global Drifter Program
- Global Earth Observation System of Systems
- Global Ecosystem Dynamics Investigation
- Global Educational Network for Satellite Operations
- Global Energy and Water Exchanges
- Global Environmental Change
- Global Environmental Multiscale Model
- Global Footprint Network
- Global Geospace Science
- Global Hands-On Universe
- Global Historical Climatology Network
- Global Internet usage
- Global Mobile Satellite System
- Global Networks
- Global Observing Systems Information Center
- Global Ocean Data Analysis Project
- Global Ocean Ecosystem Dynamics
- Global Ocean Observing System
- Global Oscillations Network Group
- Global Ozone Monitoring by Occultation of Stars
- Global Positioning System
- Global Precipitation Measurement
- Global Rocket 1
- Global Sea Level Observing System
- Global Solar Atlas
- Global Standard Stratigraphic Age
- Global Terrestrial Network for Permafrost
- Global air-traffic management
- Global and Planetary Change
- Global brain
- Global catastrophic risk
- Global change
- Global commons
- Global meteoric water line
- Global network
- Global news flow
- Global relief model
- Global surface temperature
- Global warming potential
- Global-scale Observations of the Limb and Disk
- Globally hyperbolic manifold
- Globalsat Group
- Globalstar
- Globar
- Globe at Night
- Globe of Matelica
- Globular cluster
- Globus Aerostaticus
- Globus Cassus
- Globus-1M No.12L
- Glomalin
- Glomeromycota
- Gloppedalsura
- Gloria Dubner
- Gloria Lee
- Gloria Suzanne Koenigsberger Horowitz
- Gloria-Theater (Cologne)
- Glory (satellite)
- Glory Trip
- Glospace SGK-70
- Glossary of Russian and USSR aviation acronyms: Avionics and instruments
- Glossary of astronomy
- Glossary of caving and speleology
- Glossary of environmental science
- Glossary of geology
- Glossary of geothermal heating and cooling
- Glossary of meteoritics
- Glossary of string theory
- Glow discharge
- Glow switch starter
- Glow-discharge optical emission spectroscopy
- Glowworm (astronomy)
- Gluck (crater)
- Glucose phosphate broth
- Glucuronide
- GlueX
- Gluon condensate
- Glushko (crater)
- Glutamicibacter soli
- Glynn Lunney
- Gnevyshev-Ohl rule
- Gnome
- Gnomon
- Gnomon of Saint-Sulpice
- Gnomonics
- Gnosca Observatory
- Gnowee
- Go Go Power Rangers
- Go fever
- Go the Fuck to Sleep
- Go! Princess Pretty Cure the Movie: Go! Go!! Gorgeous Triple Feature!!!
- GoTo (telescopes)
- Goa Science Centre
- Goat (zodiac)
- Goat Paddock crater
- Goat, Chelsea
- Gobabeb
- Gobi Desert
- Goblin Game
- Goclenius (crater)
- God Created the Integers
- God Emperor of Dune
- God Save the Queen (comics)
- God's Wife of Amun
- God, the Universe and Everything Else
- GodEngine
- Godadi
- Godai (Japanese philosophy)
- Goddard (crater)
- Goddard Earth Observing System
- Goddard High Resolution Spectrograph
- Goddard Institute for Space Studies
- Goddard Space Flight Center
- Goddard–Thorn theorem
- Gode Venkata Juggarow
- Godin (crater)
- Godlee Observatory
- Godrej & Boyce
- Gods in the Sky
- Godskitchen
- Godzilla 2000
- Godzilla vs. Megaguirus
- Godzilla vs. SpaceGodzilla
- Godzilla: City on the Edge of Battle
- Godzilla: Destroy All Monsters Melee
- Godzilla: King of the Monsters (2019 film)
- Godzilla: Planet of the Monsters
- Godzilla: The Planet Eater
- Goeppert-Mayer (crater)
- Goethe Basin
- Goethe Link Observatory
- Goetz Oertel
- Gogol (crater)
- Going Postal
- Goio-Erê Formation
- Gojek
- Gokujo Parodius
- Golagrama
- Golay cell
- Golconda Thrust
- Gold (crater)
- Gold Coast Motorail
- Gold Medal of the Royal Astronomical Society
- Gold universe
- GoldSim
- Golden Bed
- Golden Eagle, Birmingham
- Golden Gate (train)
- Golden Gate Ballroom
- Golden Gate of the Ecliptic
- Golden Heart, Spitalfields
- Golden Plough Tavern
- Golden Rocket (train)
- Golden Slumbers
- Golden Son
- Golden Spike Company
- Golden State (train)
- Golden State Theatre
- Golden Verses
- Golden binary
- Golden hat
- Golden masked owl
- Golden mean (philosophy)
- Golden number (time)
- GoldenEye
- Goldendale Observatory State Park
- Goldilocks principle
- Goldreich-Kylafis effect
- Goldschmidt (crater)
- Goldstino
- Goldstone Catena
- Goldstone Deep Space Communications Complex
- Goldstone Solar System Radar
- Golgi (crater)
- Goliat
- Golitsyn (crater)
- Golovin (crater)
- Golubkina (crater)
- GomSpace
- Goma (software)
- Gomez's Hamburger
- Gomul Catena
- Gondwana
- Gondwana Research
- Gonets
- Gonnus Mons
- Gonzalo Tancredi
- Good Boy!
- Good Bye, Lenin!
- Good Hope Jet
- Good Little Girls
- Good Morning and... Goodbye!
- Good Night (Beatles song)
- Good Night, Elmer
- Good Rockin' Tonite
- Goodacre (crater)
- Goodbye Blue Sky
- Goodbye Cruel World (Pink Floyd song)
- Goodbye Deponia
- Goodbye Kiss
- Goodbye Uncle Tom
- Goodbye to Berlin
- Goode Solar Telescope
- Goodnight Moon
- Goodyear Meteor Junior
- Google Earth
- Google Latitude
- Google Lunar X Prize
- Google Maps pin
- Google Street View
- Goose Lake meteorite
- Goosebumps 2: Haunted Halloween
- Gop Temple
- Gopakumar–Vafa invariant
- Gopal Krishna (astronomer)
- Gor
- Gor (film)
- Gorath
- Gordimer (crater)
- Gordo (monkey)
- Gordon A. McKay Award
- Gordon Allen Newkirk Jr.
- Gordon Cooper
- Gordon J. Garradd
- Gordon J. Stanley
- Gordon Myers Amateur Achievement Award
- Gordon Novel
- Gordon Pettengill
- Gordon Swann
- Gordon Van Gelder
- Gordon's War
- Gore (crater)
- Gore (segment)
- Gorizont
- Gorizont 33
- Gornal stone
- Gornergrat Infrared Telescope
- Gornergrat Kulm Hotel
- Gorodomlya Island
- Goseck circle
- Gosses Bluff crater
- Goth (2003 film)
- Gotha Observatory
- Gothic (Nox Arcana album)
- Gottfried Heinsius
- Gottfried Kirch
- Gottfried Wilhelm Leibniz
- Goulburn (Mars)
- Gould (crater)
- Gould Belt
- Gould Belt Survey
- Gould designation
- Governor Aker Observatory
- Govert Schilling
- Govind Swarup
- Govinda Bhattathiri
- Gow crater
- Gowdy solution
- Goya (crater)
- GpsDrive
- GpsGate
- GpsOne
- Gpsd
- GrADS
- Graceful exit problem (cosmology)
- Grachev (crater)
- Gracilibacillus halotolerans
- Grade (slope)
- Graded manifold
- Graded shoreline
- Gradius (video game)
- Gradius Advance
- Gradius Gaiden
- Gradius II
- Gradius III
- Gradius III and IV
- Gradius IV
- Gradius ReBirth
- Gradius V
- Gradius: The Interstellar Assault
- Gradualism
- Graduation Day (film)
- Graeme Park (DJ)
- Graff (Martian crater)
- Graff (lunar crater)
- Graffias
- Graham (satellite)
- Graham E. Bell
- Graham Fleming
- Graham Ingels
- Graham Ryder
- Graham Sleight
- Grain flow
- Grain for Green
- Grain size
- Grainger (crater)
- Gran Chaco
- Gran Telescopio Canarias
- Gran Turismo 6
- Granada Theater (Kansas City, Kansas)
- Granat
- Granby crater
- Grand Canyon Limited
- Grand Canyon National Park
- Grand Coulee
- Grand Hotel, Broadway
- Grand Illusion Cinema
- Grand Rapids Amateur Astronomical Association
- Grand Riviera Theater
- Grand Tour (novel series)
- Grand Tour program
- Grand Unified Theory
- Grand cross (astrology)
- Grand design spiral galaxy
- Grand tack hypothesis
- Grand unification epoch
- Grande Médaille d'Or des Explorations
- Grandma's Pet
- Grandview Mine
- Granicus Valles
- Grannus
- Grant Callin
- Grant Morrison
- Grant Nelson
- Grant O. Gale Observatory
- Grant Smillie
- Grant meteorite
- Grantchester Meadows (song)
- Granule (solar physics)
- Grape syrup
- Graphic telescope
- Graphical timeline from Big Bang to Heat Death
- Graphical timeline of the Big Bang
- Graphical timeline of the Stelliferous Era
- Graphical timeline of the universe
- Graphite furnace atomic absorption
- Grapple fixture
- Grass valley
- Grassed waterway
- Grassland degradation
- Grasslands National Park
- Grassmann number
- Grauman's Chinese Theatre
- Grauman's Egyptian Theatre
- Gravastar
- Grave (crater)
- Grave New World (Pretty Little Liars)
- Grave of the Vampire
- Gravel Gertie
- Graves (system)
- Graveyard orbit
- Gravimeter
- Gravimetry
- Graviphoton
- Graviquake
- Graviscalar
- Gravit
- Gravitation (book)
- Gravitation of the Moon
- Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor
- Gravitational Wave International Committee
- Gravitational acceleration
- Gravitational anomaly
- Gravitational binding energy
- Gravitational biology
- Gravitational collapse
- Gravitational compression
- Gravitational constant
- Gravitational coupling constant
- Gravitational energy
- Gravitational field
- Gravitational instability
- Gravitational instanton
- Gravitational interaction of antimatter
- Gravitational keyhole
- Gravitational lens
- Gravitational lensing formalism
- Gravitational memory effect
- Gravitational microlensing
- Gravitational mirage
- Gravitational plane wave
- Gravitational potential
- Gravitational redshift
- Gravitational shielding
- Gravitational singularity
- Gravitational soliton
- Gravitational time dilation
- Gravitational two-body problem
- Gravitational wave
- Gravitational wave background
- Gravitational-wave astronomy
- Gravitational-wave observatory
- Gravitationally-interacting massive particles
- Gravitino
- Gravitoelectromagnetism
- Gravitomagnetic time delay
- Gravitometer
- Graviton
- Graviton (comics)
- Gravity
- Gravity (2013 film)
- Gravity (comics)
- Gravity (software)
- Gravity Crash
- Gravity Discovery Centre
- Gravity Field and Steady-State Ocean Circulation Explorer
- Gravity Gradient Technology Satellite
- Gravity Grave
- Gravity Probe A
- Gravity Probe B
- Gravity Research Foundation
- Gravity and Extreme Magnetism
- Gravity anomalies of Britain and Ireland
- Gravity anomaly
- Gravity assist
- Gravity darkening
- Gravity drag
- Gravity feed
- Gravity gradiometry
- Gravity gun
- Gravity of Earth
- Gravity of Mars
- Gravity science (Juno)
- Gravity spreading
- Gravity tractor
- Gravity train
- Gravity turn
- Gravity-gradient stabilization
- GravitySimulator
- Gray Barker
- Gray Lensman
- Gray Lyda
- Gray treefrog
- Graziella Branduardi-Raymont
- Grazing lunar occultation
- Great American Interchange
- Great Annihilator
- Great Artesian Basin
- Great Attractor
- Great Barrier Reef
- Great Bear River
- Great Bed of Ware
- Great Book of Interpretation of Dreams
- Great Comet of 1264
- Great Comet of 1556
- Great Comet of 1577
- Great Comet of 1680
- Great Comet of 1744
- Great Comet of 1811
- Great Comet of 1819
- Great Comet of 1823
- Great Comet of 1843
- Great Comet of 1882
- Great Comet of 1901
- Great Dark Spot
- Great Debate (astronomy)
- Great Diamond
- Great Emperor of Polaris
- Great Falls orogeny
- Great Filter
- Great House at Sonning
- Great January Comet of 1910
- Great Lakes Integrated Sciences and Assessments
- Great Lakes tectonic zone
- Great Moon Hoax
- Great Northern Railway Tavern
- Great Observatories Origins Deep Survey
- Great Observatories program
- Great Paris Exhibition Telescope of 1900
- Great Plains
- Great Pumpkin
- Great Red Spot
- Great Rift (astronomy)
- Great Rift Valley
- Great Russian Regions
- Great Salinity Anomaly
- Great Science Fiction Stories About Mars
- Great Scott (lunar sample)
- Great Seal of Missouri
- Great South Australian Coastal Upwelling System
- Great Southern Comet of 1887
- Great Stalacpipe Organ
- Great Tehuelche Paleolake
- Great White Death
- Great White Spot
- Great Year
- Great bent-winged bat
- Great capes
- Great comet
- Great conjunction
- Great refractor
- Greater Adria
- Greater Green River Intergalactic Spaceport
- Greater Yellowstone Ecosystem
- Greater long-fingered bat
- Greater mouse-tailed bat
- Greaves (crater)
- Greeley (Martian crater)
- Green (Martian crater)
- Green (lunar crater)
- Green Banana Hole
- Green Bank Interferometer
- Green Bank Observatory
- Green Bank Telescope
- Green Canyon
- Green Catalogue of Supernova Remnants
- Green Dragon Tavern
- Green Dragon, Dancers Hill
- Green Earth Sciences
- Green Grotto Caves
- Green Is the Colour
- Green Kenue
- Green Lantern (film)
- Green Lantern Corps
- Green Lantern: Earth One
- Green Lantern: Emerald Knights
- Green Lantern: First Flight
- Green Lantern: Mosaic
- Green Lantern: Rise of the Manhunters
- Green Man (character)
- Green Man, Trumpington
- Green Mars (novella)
- Green Point Observatory
- Green Propellant Infusion Mission
- Green Scouting
- Green Star Series
- Green Valley (Mars)
- Green Velvet
- Green bean galaxy
- Green chemistry
- Green criminology
- Green fireballs
- Green flash
- Green infrastructure
- Green infrastructure for stormwater management
- Green star (astronomy)
- GreenPal
- GreenScreen List Translator
- GreenScreen for Safer Chemicals
- Greene King
- Greenhouse Gases Observing Satellite
- Greenhouse and icehouse Earth
- Greenhouse effect
- Greenhouse gas monitoring
- Greenland (film)
- Greenland Telescope
- Greenpeace East Asia
- Greenpeace India
- Greenwich (soil)
- Greenwich 28 inch refractor
- Greenwood frequency
- Green–Schwarz mechanism
- Greg Autry
- Greg Broadmore
- Greg Cox (writer)
- Greg Edmonson
- Greg Kinnear
- Greg Pickersgill
- Greg Pikitis
- Greg Shaw
- Greg Stainer
- Greg and Colin Strause
- Gregg Thompson (astronomer)
- Gregor Morfill
- Gregorian Tower
- Gregorian telescope
- Gregory (crater on Venus)
- Gregory (lunar crater)
- Gregory Benford
- Gregory C. Johnson
- Gregory Chamitoff
- Gregory Charvat
- Gregory Choniades
- Gregory Fahlman
- Gregory H. Johnson
- Gregory J. Harbaugh
- Gregory Jarvis
- Gregory Natural Bridge
- Gregory Olsen
- Gregory P. Laughlin
- Gregory Scott Aldering
- Gregory T. Linteris
- Gregory W. Henry
- Gregory Wright (astrophysicist)
- Gregory–Laflamme instability
- Greifswalder Oie
- Greip (moon)
- Greisen–Zatsepin–Kuzmin limit
- Grendizer
- Greninger chart
- Grenoble Observatory for Sciences of the Universe
- Gresham's law
- Greta Keller
- Greta Woodrew
- Gretchen Daily
- Gretchen W. McClain
- Grey alien
- Grey atmosphere
- Grey water
- Greyhound Pub
- Gri graphical language
- Grid compass
- Grid north
- Grid reference
- GridPP
- Gridded ion thruster
- Grieg (crater)
- Griffith Observatory
- Griffith's long-fingered bat
- Grigg (crater)
- Grignard (crater)
- Grigor Gurzadyan
- Grigori Tokaty
- Grigory Neujmin
- Grigory Shajn
- Grim Grinning Ghosts
- Grimaldi (crater)
- Grimes (musician)
- Grimke (crater)
- Grimsley (horror host)
- Grindavik (crater)
- Grishma
- Grism
- Grissom (crater)
- Groff Conklin
- Grome
- Gromov Flight Research Institute
- Gromov–Witten invariant
- Gronda lagunare
- Groom Lake (film)
- Groombridge 1618
- Groombridge 1830
- Groombridge 34
- Groombridge Transit Circle
- Grooverider
- Grooves (archaeology)
- Gros Horloge
- Grossite
- Grote Reber
- Grotrian (crater)
- Grotrian diagram
- Grotto
- Ground Based Strategic Deterrent
- Ground Crew Project
- Ground Mobile Forces
- Ground fissure
- Ground proximity warning system
- Ground sample distance
- Ground segment
- Ground track
- Ground truth
- GroundBIRD
- Groundwater
- Groundwater discharge
- Groundwater energy balance
- Groundwater flow
- Groundwater flow equation
- Groundwater on Mars
- Groundwater pollution
- Groundwater recharge
- Groundwater remediation
- Groundwater sapping
- Groundwater-dependent ecosystems
- Group (stratigraphy)
- Group Marriage
- Group field theory
- Group on Earth Observations
- Grove (crater)
- Grove House, Harrogate
- Grow Home
- Grow Up, Tony Phillips
- Growing region
- Growing the Big One
- Grubb Parsons
- Gruber Prize in Cosmology
- Gruemberger (crater)
- Gruithuisen (crater)
- Grupo Climax
- Grupo Lo Monaco
- Grupo de Astronomía y Ciencias del Espacio
- Grus (constellation)
- Grus (geology)
- Grus Wall
- Grus in Chinese astronomy
- Grylloblatta campodeiformis
- Grylloblattidae
- Grzegorz Halama Oklasky
- Grzegorz Pojmański
- Guabonito (crater)
- Guano
- Guaraci
- Guarda Crater
- Guardian (1986 video game)
- Guardians of Ga'Hoole
- Guardians of the Galaxy (TV series)
- Guardians of the Galaxy (film)
- Guardians of the Galaxy (soundtrack)
- Guardians of the Galaxy Vol. 2
- Guardians of the Galaxy Vol. 2 (soundtrack)
- Guardians of the Galaxy – Mission: Breakout!
- Guardians of the Galaxy: Cosmic Rewind
- Guardians of the Galaxy: The Telltale Series
- Guardians of the Universe
- Guards! Guards!
- Guavaween
- Gubru
- Gudea cylinders
- Guelph soil
- Guelta
- Guenter Brueckner
- Guenter Loeser Memorial Award
- Guericke (crater)
- Guest (lunar crater)
- Guest beer
- Guest star (astronomy)
- Guiana Space Centre
- Guidance, navigation, and control
- Guide Star Catalog
- Guide star
- Guiding center
- Guido Bonatti
- Guido Horn d'Arturo
- Guido Münch
- Guido d'Arezzo (crater)
- Guido von Pirquet
- Guidobaldo del Monte
- Guilbert (crater)
- Guildmasters' Guide to Ravnica
- Guillaume (crater)
- Guillaume Bigourdan
- Guillaume Le Gentil
- Guillermo Haro
- Guillermo Haro Observatory
- Guillermo del Toro
- Guilty (video game)
- Guilty Crown
- Guilá Naquitz Cave
- Guinevere Planitia
- Guinness Book of Astronomy
- Guion Bluford
- Guizhou WZ-2000
- Gujarat solar park 1
- Gul Bahao
- Gula (crater)
- Gula Mons
- Gulf
- Gulf Coast Exploreum Science Center
- Gulf Coast Rebel
- Gulf Intracoastal Waterway West Closure Complex
- Gulf Wind
- Gulf of St. Lawrence lowland forests
- Gullies on Mars
- Gulliver's Travels
- Gullstrand (crater)
- Gullstrand–Painlevé coordinates
- Gully
- Gum (crater)
- Gum 15
- Gum Nebula
- Gum catalog
- Gumbo (soil)
- Gun Ana
- Gun Frontier (video game)
- Gun camera
- Gunaras Kakaras
- Gunman Chronicles
- Gunmen of the Apocalypse
- Gunnar Erdtman
- Gunnar Garfors
- Gunnar Malmquist
- Gunnar Nordström
- Gunnerus Sustainability Award
- Gunn–Peterson trough
- Gunpei Yokoi
- Gunter Sachs
- Guo Shoujing
- Gurtam
- Gus Grissom
- Gusev (Martian crater)
- Gusev crater (Russia)
- Gustaf Gabriel Hällström
- Gustav Andreas Tammann
- Gustav Eberhard
- Gustav Hahn
- Gustav Kirchhoff
- Gustav Müller
- Gustav Naan
- Gustav Niessl von Mayendorf
- Gustav Rose
- Gustav Spörer
- Gustav Steinmann Medal
- Gustav Tschermak von Seysenegg
- Gustave Hermite
- Gusto (producer)
- Gut (coastal geography)
- Gut flora
- Gutenberg (crater)
- Guthnick (crater)
- Gut–brain axis
- Guus Berkhout
- Guwahati Planetarium
- Guy André Boy
- Guy Bomford
- Guy Consolmagno
- Guy Cuevas
- Guy Fawkes Night
- Guy Fawkes mask
- Guy Gardner (astronaut)
- Guy H. Lillian III
- Guy Laliberté
- Guy Reiss
- Guyford Stever
- Guyot (crater)
- Guyparkeria
- Guys with Kids
- Guz Hardy & J Luke
- Guzhangian
- Guñelve
- Gwacheon National Science Museum
- Gwen Bridge
- Gwen Fenton
- Gwenddydd
- Gweni-Fada crater
- Gwyneth Jones (novelist)
- Gwynne Shotwell
- Gyarah Sidi
- Gyldén (crater)
- Gypcrust
- Gypsisol
- Gypsum cave
- Gypsy Rose Lee
- Gyrocompass
- Gyrokinetic ElectroMagnetic
- Gyrokinetics
- Gyroradius
- Gyula Fényi
- György Kulin
- György Paál
- Gärtner (crater)
- Gäu
- Géo André
- Géomorphologie
- Gérard Feldzer
- Gérard Klein
- Gérard de Vaucouleurs
- Géza Hofi
- Gödel metric
- Göktürk-1
- Göktürk-2
- Göktürk-3
- Göncöl Foundation
- Görel Crona
- Görtler vortices
- Gösta Gahm
- Göteborgs FyrverkeriFabrik
- Göttingen Observatory
- Günter Wendt
- Gēmusetto
- Għar Għerduf catacombs
- H Carinae
- H Centauri
- H I region
- H II region
- H Puppis
- H Scorpii
- H Velorum
- H band (infrared)
- H-1NF
- H-I
- H-II Transfer Vehicle
- H-alpha
- H. A. Rey
- H. Bruce Franklin
- H. G. Wells (crater)
- H. G. Wells' The Shape of Things to Come
- H. G. van de Sande Bakhuyzen
- H. Jay Melosh
- H. L. Gold
- H. P. Lovecraft
- H. Paul Shuch
- H. R. Giger
- H. R. MacMillan Space Centre
- H. R. Nagendra
- H. R. Van Dongen
- H.R. 1300 (113th Congress)
- H.V. Dalling
- H1504+65
- H1821+643
- H2356-309
- HABIT (HabitAbility: Brine, Irradiation and Temperature)
- HAL 9000
- HAL Laboratory
- HAL/S
- HALCA
- HAMMER (spacecraft)
- HAMSAT
- HARPS-N
- HAT-P-11
- HAT-P-11b
- HAT-P-12
- HAT-P-12b
- HAT-P-13
- HAT-P-13b
- HAT-P-13c
- HAT-P-14b
- HAT-P-15
- HAT-P-16
- HAT-P-17
- HAT-P-18
- HAT-P-19
- HAT-P-1b
- HAT-P-20
- HAT-P-21
- HAT-P-23
- HAT-P-24
- HAT-P-24b
- HAT-P-25
- HAT-P-26
- HAT-P-27
- HAT-P-28
- HAT-P-29
- HAT-P-2b
- HAT-P-3
- HAT-P-30
- HAT-P-32b
- HAT-P-33
- HAT-P-33b
- HAT-P-3b
- HAT-P-4
- HAT-P-4b
- HAT-P-5
- HAT-P-50b
- HAT-P-5b
- HAT-P-6
- HAT-P-6b
- HAT-P-7
- HAT-P-7b
- HAT-P-8
- HAT-P-8b
- HAT-P-9
- HAT-P-9b
- HATNet Project
- HATS-11b
- HATS-36b
- HCG 87
- HCM-6A
- HCN-0.009-0.044
- HD 100307
- HD 100546
- HD 100655
- HD 100777
- HD 100777 b
- HD 100825
- HD 101570
- HD 101584
- HD 10180
- HD 10180 c
- HD 101930
- HD 101930 b
- HD 102117
- HD 102117 b
- HD 102195
- HD 102195 b
- HD 102272
- HD 102272 b
- HD 102272 c
- HD 102350
- HD 102365
- HD 102776
- HD 102839
- HD 102956 b
- HD 10307
- HD 103079
- HD 103197
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- HD 103774
- HD 104067
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- HD 104304
- HD 104985
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- HD 105382
- HD 10550
- HD 106112
- HD 106252
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- HD 10647
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- HD 106515
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- HD 107146
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- HD 107914
- HD 108063
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- HD 108541
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- HD 109271
- HD 109749
- HD 109749 b
- HD 110073
- HD 110432
- HD 110458
- HD 110956
- HD 111031
- HD 111031 b
- HD 111232
- HD 111232 b
- HD 111395
- HD 111456
- HD 111597
- HD 111915
- HD 111968
- HD 112014
- HD 112028
- HD 112410
- HD 113337
- HD 113538
- HD 113538 b
- HD 113538 c
- HD 113703
- HD 113766
- HD 114386
- HD 114386 b
- HD 114613
- HD 114729
- HD 114729 b
- HD 114762
- HD 114762 b
- HD 114783
- HD 114783 b
- HD 114837
- HD 115004
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- HD 11506 b
- HD 11506 c
- HD 115211
- HD 115310
- HD 115337
- HD 115404
- HD 115600
- HD 116029
- HD 116243
- HD 117207
- HD 117207 b
- HD 117440
- HD 117618
- HD 117618 b
- HD 117939
- HD 118203
- HD 118203 b
- HD 1185
- HD 118508
- HD 118889
- HD 119124
- HD 11964
- HD 11964 b
- HD 11964 c
- HD 119921
- HD 120084
- HD 12039
- HD 12055
- HD 120987
- HD 121228
- HD 12139
- HD 121474
- HD 121504
- HD 121504 b
- HD 122430
- HD 122430 b
- HD 122563
- HD 123569
- HD 123657
- HD 1237
- HD 124639
- HD 12467
- HD 125040
- HD 125072
- HD 125288
- HD 125351
- HD 125442
- HD 125595
- HD 125612
- HD 125612 b
- HD 125612 c
- HD 125612 d
- HD 125628
- HD 125658
- HD 125823
- HD 126009
- HD 126053
- HD 126128
- HD 126141
- HD 126200
- HD 126271
- HD 12661
- HD 12661 b
- HD 12661 c
- HD 126614
- HD 126614 Ab
- HD 1273
- HD 127304
- HD 127726
- HD 128093
- HD 128198
- HD 128311
- HD 128311 b
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- HD 128333
- HD 128429
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- HD 129116
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- HD 129445
- HD 129445 b
- HD 129456
- HD 129685
- HD 130084
- HD 130144
- HD 130322
- HD 130322 b
- HD 130458
- HD 130603
- HD 130917
- HD 130948
- HD 131040
- HD 131399
- HD 131399 Ab
- HD 131473
- HD 131496
- HD 131551
- HD 131664
- HD 13189
- HD 132029
- HD 132406
- HD 132406 b
- HD 132563
- HD 133002
- HD 133131
- HD 133600
- HD 133683
- HD 134060
- HD 134064
- HD 134335
- HD 134439/HD 134440
- HD 134606
- HD 134687
- HD 135438
- HD 135530
- HD 135944
- HD 136118
- HD 136118 b
- HD 137058
- HD 137388
- HD 137509
- HD 138573
- HD 139139
- HD 13931
- HD 13931 b
- HD 139357
- HD 139357 b
- HD 139664
- HD 140283
- HD 140913
- HD 141569
- HD 141846
- HD 141937
- HD 141937 b
- HD 142
- HD 142 b
- HD 142022
- HD 142022 Ab
- HD 142245
- HD 142250
- HD 142415
- HD 142415 b
- HD 142527
- HD 143009
- HD 143183
- HD 143361
- HD 143361 b
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- HD 14412
- HD 145377
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- HD 145457
- HD 1461
- HD 1461 b
- HD 14622
- HD 146389
- HD 146624
- HD 147018
- HD 147018 b
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- HD 147506
- HD 147513
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- HD 148156
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- HD 148427
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- HD 149026
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- HD 149143
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- HD 149382
- HD 149837
- HD 149989
- HD 150136
- HD 150248
- HD 150576
- HD 150706
- HD 15082
- HD 15115
- HD 151566
- HD 151613
- HD 151932
- HD 151967
- HD 152010
- HD 152079
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- HD 152082
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- HD 153370
- HD 153791
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- HD 154088
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- HD 154577
- HD 154672
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- HD 154857
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- HD 155035
- HD 155233 b
- HD 15524
- HD 155358
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- HD 15558
- HD 156091
- HD 156279
- HD 156331
- HD 156411
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- HD 156668
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- HD 157661
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- HD 157753
- HD 157819
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- HD 158614
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- HD 15920
- HD 159868
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- HD 16004
- HD 16028
- HD 160342
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- HD 1606
- HD 16175
- HD 16175 b
- HD 161840
- HD 161988
- HD 162020
- HD 162826
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- HD 163376
- HD 163607 b
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- HD 163840
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- HD 164712
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- HD 165185
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- HD 166
- HD 166066
- HD 166724
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- HD 167257
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- HD 168443 b
- HD 168607
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- HD 171978
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- HD 187734
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- HD 189276
- HD 189567
- HD 18970
- HD 189733
- HD 189733 b
- HD 189831
- HD 190007
- HD 190056
- HD 190228
- HD 190647
- HD 190647 b
- HD 190984
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- HD 191104
- HD 191760
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- HD 191939
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- HD 192263
- HD 192263 b
- HD 192310
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- HD 19275
- HD 193664
- HD 194244
- HD 19467 B
- HD 195019
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- HD 195564
- HD 196050
- HD 196050 b
- HD 196761
- HD 196885
- HD 196885 Ab
- HD 197027
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- HD 202206
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- HD 202259
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- HD 20367
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- HD 219279
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- HD 220035
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- HD 23753
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- HD 24040
- HD 24040 b
- HD 240429/240430
- HD 24071
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- HD 24496
- HD 24496 Ab
- HD 24496 Ab
- HD 24496 Ab
- HD 24496 Ab
- HD 24496 Ab
- HD 24496 Ab
- HD 2454
- HD 25171
- HD 256
- HD 259431
- HD 2638
- HD 2638 b
- HD 268835
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- HD 3
- HD 30177
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- HD 40979
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- HD 41004
- HD 41004 Ab
- HD 4113
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- HD 41534
- HD 41742/41700
- HD 4203
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- HD 53705/53706/53680
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- HD 5789/5788
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- HD 6
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- HD 74180
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- HD 79447
- HD 79498
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- HH 1/2
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- HI-SEAS
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- HIP 100963
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- HIP 11952
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- HIP 41378
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- HIP 5158
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- HR 5256
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- Haber's rule
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- Habitability of binary star systems
- Habitability of natural satellites
- Habitability of red dwarf systems
- Habitable Exoplanet Imaging Mission
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- Habitable exomoon
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- Habitat
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- Hachimoji DNA
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- HadCM3
- HadGEM1
- Hadad
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- Hadean
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- Hadron epoch
- Haegemonia: Legions of Iron
- Hafele–Keating experiment
- Hagal dune field
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- Hagecius (crater)
- Hagedorn temperature
- Hagen (crater)
- Hagen–Rubens relation
- Haggart Observatory
- Hahn (crater)
- Hai-Genti
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- Hail Columbia (film)
- Hainzel (crater)
- Hair ice
- Hairy Head
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- Haiyantang
- Hajime Sorayama
- Hakeem M. Oluseyi
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- Hakucho
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- Hal A. Weaver
- Haladaptatus
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- Halcyon 6
- Haldane (Martian crater)
- Haldane (lunar crater)
- Hale (Martian crater)
- Hale (lunar crater)
- Hale Solar Laboratory
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- Halley (Martian crater)
- Halley (lunar crater)
- Halley (nightclub)
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- Halley's Comet (video game)
- HalloVeen
- HalloWeekends
- HalloWishes
- Hallowe'en Party
- Halloween
- Halloween (1931 film)
- Halloween (1978 film)
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- Halloween (American Horror Story)
- Halloween (Brooklyn Nine-Nine)
- Halloween (Buffy the Vampire Slayer)
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- Halloween (Misfits song)
- Halloween (Modern Family)
- Halloween (The Office)
- Halloween (children's book)
- Halloween (franchise)
- Halloween (poem)
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- Halloween (video game)
- Halloween 3: AwesomeLand
- Halloween 4: The Return of Michael Myers (soundtrack)
- Halloween ABC
- Halloween Adventure
- Halloween Candy
- Halloween Hall o' Fame
- Halloween Haunt (Canada's Wonderland)
- Halloween Horror Nights
- Halloween II (Brooklyn Nine-Nine)
- Halloween II (soundtrack)
- Halloween III (Brooklyn Nine-Nine)
- Halloween III: Season of the Witch (soundtrack)
- Halloween IV (Brooklyn Nine-Nine)
- Halloween IV: Revenge of Rod Skyhook
- Halloween Is Grinch Night
- Halloween Night
- Halloween Night (song)
- Halloween Party (song)
- Halloween Screams
- Halloween Spooktacular
- Halloween Surprise
- Halloween cake
- Halloween card
- Halloween costume
- Halloween in the Castro
- Halloween of Horror
- Halloween on Franklin Street
- Halloween on Spooner Street
- Halloween solar storms, 2003
- Halloween with the New Addams Family
- Halloween: Monster Mix
- Halloween: Sweet Tooth
- Halloweentown (film series)
- Halloweentown (film)
- Halloweentown II: Kalabar's Revenge
- Hallucination Generation
- Halmahera boobook
- Halo (crater)
- Halo (franchise)
- Halo 2
- Halo 2600
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- Halo 4
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- Halo Array
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- Halo orbit
- Halo.Bungie.Org
- Halo: Combat Evolved
- Halo: Combat Evolved Anniversary
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- Halo: The Master Chief Collection
- Haloalcalophilium
- Haloarchaea
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- Halobacteriaceae
- Halobacteriales
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- Halobacterium noricense
- Halobacterium salinarum
- Halobaculum
- Halobaculum gomorrense
- Halobiforma
- Halobiforma haloterrestris
- Halobiotus
- Halochromism
- Halocin
- Halococcus
- Halococcus dombrowskii
- Halococcus salifodinae
- Haloechinothrix alba
- Halogeometricum
- Halomicrobium
- Halomonas
- Halophile
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- Haloplanus natans
- Haloplanus salinarium
- Haloquadratum
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- Halorubrum
- Halosarcina
- Halosere
- Halosimplex
- Halostagnicola
- Halostagnicola larsenii
- Haloterrigena
- Haloterrigena longa
- Halothermal circulation
- Halotolerance
- Halovivax
- Hals (crater)
- Halton Arp
- Haly Abenragel
- Ham (chimpanzee)
- Ham Lambert
- Hamal
- Hamanasu (train)
- Hamburg Observatory
- Hamburg Planetarium
- Hamburg School of Astrology
- Hamburg/ESO Survey
- Hamed Gohar
- Hamilton (crater)
- Hamilton Astronomical Society Observatory
- Hamilton Jeffers
- Hamilton Lanphere Smith
- Hamilton–Jacobi–Einstein equation
- Hamlet (crater)
- Hamlet's Mill
- Hammaguir
- Hammar Lacus
- Hammer (film)
- Hammerfall (novel)
- Hammock
- Hammock camping
- Hamori (crater)
- Hampshire Hog
- Hampstead Scientific Society
- Hampton Court astronomical clock
- Hamun
- Han (trilobite)
- Han Kan (crater)
- Han Solo
- Han Zhanwen
- Hanany–Witten transition
- Hanazuki: Full of Treasures
- Hand and Heart, Peterborough
- Hand and Shears
- Hand-held maneuvering unit
- Handbook of 809
- Handbook of Australian Soils
- Handel (crater)
- Handsome Jack
- Handwashing in Judaism
- Hanford Site
- Hangar 18 (song)
- Hangenberg event
- Hanging glacier
- Hangup (film)
- Hank Berger
- Hank Henshaw
- Hank Reinhardt
- Hankasalmi Observatory
- Hanna von Hoerner
- Hannah Holliday Stewart
- Hannah Wants
- Hannes Alfvén
- Hannes Alfvén Prize
- Hannes Bok
- Hanno (crater)
- Hanns Dieter Hüsch
- Hanns Hörbiger
- Hanny's Voorwerp
- Hanover Theatre for the Performing Arts
- Hans Albert Einstein
- Hans Dijkstal
- Hans E. Lau
- Hans Egede Medal
- Hans Fichtner
- Hans Freudenthal
- Hans Geelmuyden
- Hans Hass Award
- Hans Hüter
- Hans Jenny (pedologist)
- Hans Jonas
- Hans Kammler
- Hans Koenigsmann
- Hans Lipperhey
- Hans Ludendorff
- Hans Michael Maitzen
- Hans Momsen
- Hans Moritz von Brühl
- Hans Oeschger Medal
- Hans Oleak
- Hans Robert Scultetus
- Hans Schindler Bellamy
- Hans Schjellerup
- Hans Schlegel
- Hans Scholl (astronomer)
- Hans Severin Jelstrup
- Hans Stefan Santesson
- Hans Stille Medal
- Hans Thirring
- Hans Waldemar Wessolowski
- Hans Zarkov
- Hans von Storch
- Hans-Emil Schuster
- Hans-Heinrich Voigt
- Hans-Joachim Haase (optician)
- Hans-Jürgen Treder
- Hans-Walter Rix
- Hansen (crater)
- Hansmukh Rathod
- Hansteen (crater)
- Hantsavichy Radar Station
- Hanul cu Tei
- Hanumant Shankar Sawant
- Haoman 17
- Hapke parameters
- Hapkeite
- Haplocambids
- Happily Ever After (1990 film)
- Happily Ever After (Magic Kingdom)
- Happy Halloween, Scooby-Doo!
- Harald Lesch
- Harassed (1964 film)
- Harbor
- Harbour Main Group
- Harcourt Group
- Hard Labor Creek Observatory
- Hard Mobile Launcher
- Hard X-ray Modulation Telescope
- Hard start
- Hardbodies 2
- Hardcore Station
- Harden (crater)
- Harding (crater)
- Hardpan
- Hardscape
- Hardsoul
- Hardspace: Shipbreaker
- Hardtack Teak
- Hardwar (video game)
- Hardware Wars
- Hardy's Well
- Hare and Hounds, East Sheen
- Hare and Hounds, St Albans
- Hare-Way to the Stars
- Haredevil Hare
- Harestua Solar Observatory
- Haret (crater)
- Hargraves (crater)
- Hargreaves (crater)
- Hari Keshab Sen
- Hari Kunzru
- Haridatta
- Harisu
- Harkhebi
- Harkhebi (crater)
- Harlan (crater)
- Harlan Ellison
- Harlan J. Smith Telescope
- Harlan James Smith
- Harlan True Stetson
- Harland Epps
- Harley Rutledge
- Harlock: Space Pirate
- Harlow Shapley
- Harmakhis Vallis
- Harmful algal bloom
- HarmoKnight
- Harmonia Macrocosmica
- Harmonic Convergence
- Harmonic superspace
- Harmonices Mundi
- Harmonised monitoring scheme
- Harmony (ISS module)
- Haro 11
- Harold Alden
- Harold Armytage Sanders
- Harold C. Urey Prize
- Harold Curlewis
- Harold D. Babcock
- Harold F. Levison
- Harold Finger
- Harold Fürth
- Harold G. White
- Harold Jacoby
- Harold Johnson (astronomer)
- Harold Knox-Shaw
- Harold La Borde
- Harold Littler
- Harold Masursky
- Harold P. Eubank
- Harold Reitsema
- Harold Spencer Jones
- Harold T. Wilkins
- Harold Urey
- Harold W. McCauley
- Harold Wellman
- Harold Zirin
- Harpalus (crater)
- Harpalyke (moon)
- Harpocrates
- Harpos Concert Theatre
- Harran Sulci
- Harrie Massey
- Harriet H. Malitson
- Harriet White Fisher
- Harriet's Halloween Candy
- Harrington Arms, Gawsworth
- Harriot (crater)
- Harris Geospatial
- Harrison Schmitt
- Harry Arthur Crowhurst
- Harry Bates (author)
- Harry Brittain
- Harry E. Huffman
- Harry Eckler
- Harry Edwin Wood
- Harry Godwin
- Harry Goodwin (cricketer)
- Harry Harrison (writer)
- Harry Hemley Plaskett
- Harry Julian Allen
- Harry Kloor
- Harry Knowles
- Harry Kroto
- Harry Lange (film designer)
- Harry McSween
- Harry Romero
- Harry Yandell Benedict
- Harry's New York Bar
- Hartebeesthoek Radio Astronomy Observatory
- Hartig net
- Hartland Snyder
- Hartle-Thorne metric
- Hartle–Hawking state
- Hartmann (crater)
- Hartmann mask
- Hartmut Jahreiß
- Hartmut Zohm
- Hartree Centre
- Hartung–Boothroyd Observatory
- Hartwig (Martian crater)
- Hartwig (lunar crater)
- Harunobu (crater)
- Harvard College Observatory
- Harvard Radio Meteor Project
- Harvard–Smithsonian Center for Astrophysics
- Harvesting lightning energy
- Harvey (crater)
- Harvey Birdman, Attorney at Law
- Harvey H. Nininger
- Harvey Pirie
- Harvey Raymond Butcher
- Harvey's Brewery
- Hase (crater)
- Haseb (rocket)
- Haseb-i Tabari
- Hasegawa–Mima equation
- Haskin (crater)
- Hassan (crater)
- Hasselblad
- Hastings Museum
- Hastur Lord
- Hatanaka (crater)
- Hatchet II
- Hatchet III
- Hate Crime (2013 film)
- Hathor
- Hathor (month)
- Hati (moon)
- Hatsuyume
- Haua
- Haughton impact crater
- Haughton–Mars Project
- Haulani (crater)
- Haumea
- Haumea (mythology)
- Haumea family
- Haunted (The Vampire Diaries)
- Haunted attraction (simulated)
- Hauptmann (crater)
- Hausa animism
- Hausen (crater)
- Hausmannite
- Haute-Provence Observatory
- Hava Hornung
- Havana Plan Piloto
- Have Rocket, Will Travel
- Have Space Suit—Will Travel
- Have a Cigar
- Haven (video game)
- Haven: Call of the King
- Haverah Park experiment
- Haviland Crater
- Hawaii Ocean Time-series
- Hawaii Undersea Research Laboratory
- Hawaiian Trough
- Hawera Observatory
- Hawk Inn, Haslington
- HawkSat I
- Hawke (crater)
- Hawkgirl
- Hawkgirl (Kendra Saunders)
- Hawking (2004 film)
- Hawking (2013 film)
- Hawking energy
- Hawking radiation
- Hawking-Page phase transition
- Hawkman (Carter Hall)
- Hawkman (Fel Andar)
- Hawkman (Katar Hol)
- Hawkmistress!
- Hawkwoman
- Haworth (crater)
- Hawthorne (crater)
- Haxonite
- Hayabusa
- Hayabusa (train)
- Hayabusa Mk2
- Hayabusa Terra
- Hayabusa2
- Hayabusa: Harukanaru Kikan
- Hayashi limit
- Hayashi track
- Hayato (satellite)
- Hayden Memorial Geological Award
- Haydn (crater)
- Hayford (crater)
- Hayn (crater)
- Haystack Catena
- Haystack Observatory
- Hayward metric
- Hayyim Selig Slonimski
- Hazard
- Hazard analysis
- Hazardous Substances Data Bank
- Hazards of outdoor recreation
- Hazcam
- Hazchem
- He Fell into a Dark Hole
- He Knows You're Alone
- He Zehui
- He's Simple, He's Dumb, He's the Pilot.
- He-Man
- He-Man & She-Ra: A Christmas Special
- He-Man and the Masters of the Universe
- He-Man and the Masters of the Universe (2002 TV series)
- He-Man and the Masters of the Universe (2012 DC comic)
- He-Man/ThunderCats
- He-Man: Defender of Grayskull
- He-Man: Power of Grayskull
- He-Man: The Most Powerful Game in the Universe
- Head (crater)
- Head (geology)
- Head (hydrology)
- Head cut (stream geomorphology)
- Head for heights
- Head of tide
- Head-up display
- Headboard (furniture)
- Header (film)
- Heading indicator
- Headland
- Headland (agriculture)
- Headless Horseman Hayrides and Haunted Houses
- Heads Will Roll (song)
- Headwall
- Headward erosion
- Health & Place
- Health effects of sunlight exposure
- Health hazards of air travel
- Health threat from cosmic rays
- Healy (crater)
- Heart (Chinese constellation)
- Heart Beat, Pig Meat
- Heart Nebula
- Heart of Empire
- Heart of Gold (Firefly)
- Heart of the Alien
- Heart of the Comet
- Heartbeat star
- Heat Capacity Mapping Mission
- Heat Flow and Physical Properties Package
- Heat Shield Rock
- Heat Signature (video game)
- Heat Vision and Jack
- Heat death of the universe
- Heat death paradox
- Heat lightning
- Heat pipe
- Heat shield
- Heat-pipe tectonics
- Heath
- Heather Couper
- Heather Heart
- Heaven (nightclub)
- Heaven Help Us
- Heaven Will Be Mine
- Heaven's Reach
- Heaven's Soldiers
- Heavenly Daze
- Heavenly Market enclosure
- Heavens-Above
- Heaviside (Martian crater)
- Heaviside (lunar crater)
- Heavy Metal: F.A.K.K. 2
- Heavy metal subdwarf
- Heavy-lift launch vehicle
- Heazlewoodite
- Heber Doust Curtis
- Hebes Chasma
- Hebes Mensa
- Hebesuncus
- Hebrew astronomy
- Hebrus Valles
- Hecataeus (crater)
- Hecate
- Hecates Tholus
- Hector Fonseca
- Hector Garrido
- Hector Hall
- Hector Macpherson (astronomer)
- Hector Xtravaganza
- Hedda Lettuce
- Hedin (crater)
- Heechee
- Heel Stone
- Heelstone Ditch
- Hegemone (moon)
- Hehuanshan
- Heidelberg-Königstuhl State Observatory
- Heidelberger Schicksalsbuch
- Heidemarie Stefanyshyn-Piper
- Heidi (god)
- Heidi Cullen
- Heidi Hammel
- Height above sea level
- Heiheionakeiki
- Heikki A. Alikoski
- Heim theory
- Heimdal (crater)
- Heimdall (Callistonian crater)
- Heine (crater)
- Heinlein (crater)
- Heino Falcke
- Heinrich (crater)
- Heinrich Bruns
- Heinrich Christian Schumacher
- Heinrich Dau
- Heinrich Decimator
- Heinrich Eduard von Lade
- Heinrich Hertz Submillimeter Telescope
- Heinrich Kreutz
- Heinrich Louis d'Arrest
- Heinrich Schwabe
- Heinrich Siedentopf
- Heinrich Vogt (astronomer)
- Heinrich Wilhelm Brandes
- Heinrich Wilhelm Matthias Olbers
- Heinsius (crater)
- Heinz Billing
- Heinz Hall for the Performing Arts
- Heinz Oberhummer
- Heinz Raether
- Heinz-Hermann Koelle
- Heirs of Empire
- Heis (crater)
- Helatrobus
- Helberg (crater)
- Helen B. Warner Prize for Astronomy
- Helen Boehm
- Helen Fricker
- Helen Lines
- Helen Ling
- Helen Morgan
- Helen Sawyer Hogg
- Helen Sharman
- Helen of Troy
- Helene (moon)
- Heliacal rising
- Helical engine
- Helical orbit spectrometer
- Helically Symmetric Experiment
- Helicam
- Helicon (crater)
- Helicon (river)
- Helicon double-layer thruster
- Helicopter 66
- Helicopter hieroglyphs
- Helike (moon)
- Heliocentric Julian Day
- Heliocentric orbit
- Heliocentrism
- Heliometer
- Helion (meteoroid)
- Helion Energy
- Heliophysics
- Heliophysics NASA science
- Heliophysics Science Division
- Helios
- Helios (propulsion system)
- Helios (spacecraft)
- Helios 2 (satellite)
- Helioscope
- Helioseismology
- Heliosphere
- Heliospheric current sheet
- Heliospheric imager
- Heliostat
- Helisaeus Roeslin
- Helium flash
- Helium focusing cone
- Helium line ratio
- Helium planet
- Helium star
- Helium-3
- Helium-weak star
- Helix Nebula
- Hell (DC Comics)
- Hell (crater)
- Hell Ride
- Hell Up in Harlem
- Hell house
- Hell on Earth 2006
- Hell's Angels '69
- Hell's Belles (film)
- Hell's Bloody Devils
- Hellas Montes
- Hellas Planitia
- Hellas Sat 2
- Hellas Sat 3
- Hellas quadrangle
- Helldivers
- Hellenic Aerospace Industry
- Hellenic Journal of Geosciences
- Hellenic Military Geographical Service
- Hellenic Space Agency
- Hellenic Trench
- Hellenistic astrology
- Hellespontus Montes
- Hellhole (film)
- Helliconia
- Hellion (video game)
- Hellmuth Walter
- Hello (company)
- Hello! How Are You?
- Hello, Harvest Moon
- Hellpoint
- Hells Angels on Wheels
- Helmert (crater)
- Helmet streamer
- Helmet-mounted display
- Helmholtz (Martian crater)
- Helmholtz (lunar crater)
- Helmholtz flow
- Helmi stream
- Helmut Abt
- Helmut Bischoff
- Helmut Gröttrup
- Helmut H. Schaefer
- Helmut Hölzer
- Helmut Ullrich Astronomical Observatory
- Helmut W. Schulz
- Helmut Wimmer
- Helsinki University Observatory
- Hemera
- Hemiboreal
- Hemingway (crater)
- Hemipelagic sediment
- Hemispheres of Earth
- Hemispherical electron energy analyzer
- Hemispherical photography
- Hemispherical resonator gyroscope
- Hemolithin
- Hen 2-10
- Hen 2-428
- Hen 2-437
- Hen 2-47
- Henbury Meteorites Conservation Reserve
- Hendecagram
- Henderson (crater)
- Hendrik C. van de Hulst
- Hendrik Lorentz
- Hendrik van Gent
- Hendrix (crater)
- Heng-O Corona
- Henize 206
- Henny van der Windt
- Henree
- Henri Arnaut de Zwolle
- Henri Debehogne
- Henri Joseph Anastase Perrotin
- Henri M.J. Boffin
- Henri Poincaré
- Henri-Alexandre Deslandres
- Henrietta Swan Leavitt
- Henrik Johan Walbeck
- Henrik Mohn
- Henrik Svensmark
- Henrique Alvim Corréa
- Henry "Trae" Winter
- Henry (Apollo lunar crater)
- Henry (Martian crater)
- Henry (lunar crater)
- Henry Bate of Mechelen
- Henry Brinton
- Henry C. King
- Henry Chamberlain Russell
- Henry Charles Gordon
- Henry Crew
- Henry Crown Space Center
- Henry Crozier Keating Plummer
- Henry Draper
- Henry Draper Catalogue
- Henry Draper Medal
- Henry E. Holt
- Henry Earl Singleton
- Henry Fitz
- Henry Fox Talbot
- Henry Frith
- Henry Frères (crater)
- Henry Gale (astrophysicist)
- Henry Gee
- Henry Hamilton (priest)
- Henry Hartsfield
- Henry Hasse
- Henry Hoyle Howorth
- Henry Jasper Redfern
- Henry Kandrup
- Henry L. Giclas
- Henry Lawson (astronomer)
- Henry Lin (astronomer)
- Henry Lincoln
- Henry Lomb
- Henry Norris Russell
- Henry Norris Russell Lectureship
- Henry P. H. Bromwell
- Henry Paul Hansen
- Henry Poston
- Henry Slesar
- Henry Smith Pritchett
- Henry Stommel Research Award
- Henry Stuart Jones
- Henry Throop
- Henry Tye
- Henry Ussher (astronomer)
- Henry Vernon Wong
- Henry: Portrait of a Serial Killer
- Henyey (crater)
- Henyey track
- Hepatocystis bainae
- Hepatocystis brosseti
- Hepatocystis carpenteri
- Hepatocystis epomophori
- Hepatocystis hipposideri
- Hepatocystis perronae
- Hepatocystis pteropti
- Hepatotoxicity
- Hephaestus Fossae
- Heptabarb
- Heptagram
- Heptobarbital
- Hepzibah (comics)
- Her Desher Vallis
- Her Majesty's Spiffing
- Her Private Hell
- Heraclitus
- Heraclitus (crater)
- Herapathite
- Herbert Alonzo Howe
- Herbert Armitage James
- Herbert Dingle
- Herbert E. Grier
- Herbert Grotrian
- Herbert Gursky
- Herbert Hall Turner
- Herbert L. Strauss
- Herbert Raab
- Herbert T. Ueda
- Herbicide
- Herbig Ae/Be star
- Herbig–Haro object
- Hercules (constellation)
- Hercules (crater)
- Hercules (dwarf galaxy)
- Hercules A
- Hercules Against the Moon Men
- Hercules Cluster
- Hercules Superclusters
- Hercules X-1
- Hercules in Chinese astronomy
- Hercules stream
- Hercules–Corona Borealis Great Wall
- Here Comes Treble
- Here Comes the Moon
- Here be dragons
- Heredity (short story)
- Hereford Arizona Observatory
- Heremba Bailung
- Heretics of Dune
- Herigonius (crater)
- Heritage Trilogy
- Herley Industries
- Herman Potočnik
- Herman Schultz (astronomer)
- Herman Zanstra
- Herman of Carinthia
- Hermann (crater)
- Hermann Bondi
- Hermann Brück
- Hermann Carl Vogel
- Hermann Ganswindt
- Hermann Goldschmidt
- Hermann Hunger
- Hermann Joseph Klein
- Hermann Kobold
- Hermann Minkowski
- Hermann Mucke (astronomer)
- Hermann Oberth
- Hermann Rothe
- Hermann Weyl
- Hermann of Reichenau
- Hermann von Struve
- Hermann-Oberth-Gesellschaft
- Hermes
- Hermes (satellite)
- Hermes (spacecraft)
- Hermes Road Measurement System
- Herminiimonas glaciei
- Hermippe (moon)
- Hermite (crater)
- Herne Tavern
- Hernán Cattáneo
- Hero (1983 film)
- Hero Rupes
- Herodotus (crater)
- Heroes Chronicles
- Heroes of Might and Magic
- Heroes of Might and Magic (Game Boy Color)
- Heroes of Might and Magic II
- Heroes of Might and Magic III
- Heroes of Might and Magic III: Armageddon's Blade
- Heroes of Might and Magic III: The Shadow of Death
- Heroes of Might and Magic IV
- Heroes of Might and Magic IV (card game)
- Heroes of Might and Magic Online
- Heroes of Might and Magic V
- Heroes of Might and Magic V: Hammers of Fate
- Heroes of Might and Magic V: Tribes of the East
- Heroes of Might and Magic: A Strategic Quest
- Heroes of Might and Magic: Quest for the Dragon Bone Staff
- Heron (crater)
- Herrett Center for Arts and Science
- Herrett Observatory
- Herschel (Martian crater)
- Herschel (Mimantean crater)
- Herschel (crater)
- Herschel (lunar crater)
- Herschel 400 Catalogue
- Herschel Medal
- Herschel Museum of Astronomy
- Herschel Space Observatory
- Herschel wedge
- Herse (moon)
- Herta Regina Leng
- Hertha Wambacher
- Hertz (crater)
- Hertzsprung (crater)
- Hertzsprung gap
- Hertzsprung–Russell diagram
- Hervé Faye
- Hervé Stevenin
- Herwart von Hohenburg
- Herzberg Institute of Astrophysics
- Hesiod (crater)
- Hesiodus (crater)
- Hesperus
- Hess (crater)
- Hess diagram
- Hess-Apollo (crater)
- Hestia (novel)
- Heterogeneous Aerial Reconnaissance Team
- Heteronuclear single quantum coherence spectroscopy
- Heterosphere
- Heterotic string theory
- Hevelius (crater)
- Hevesy (crater)
- Heweliusz (satellite)
- Hex Hector
- Hexaarylbiimidazole
- Hexafluoroisobutylene
- Hexagram
- Hexapod-Telescope
- Hexazinone
- Hexethal
- Hexobarbital
- Hey You (Pink Floyd song)
- Hey! Pikmin
- Hey's Mineral Index
- Heymans (crater)
- Heyrovsky (crater)
- Hi-Ten Bomberman
- HiRISE
- HiROS
- HiWish program
- Hibari (satellite)
- Hibernation
- Hibernation (spaceflight)
- Hibes Montes
- Hibonite
- Hicetas
- Hickman crater
- Hickson 44
- Hickson Compact Group
- Hidden Figures
- Hidden Universe 3D
- Hidden Valley Observatory
- Hide-and-Seek (short story)
- Hideo Itokawa
- Hideo Kojima
- Hideo Shima
- Hiding in the Light
- Hierarchy problem
- Hierarchy theory
- Hieronymus Schreiber
- Higgs Discovery
- Higgsino
- High Above
- High Accuracy Radial Velocity Planet Searcher
- High Adventure Cliffhangers Buck Rogers Adventure Game
- High Altitude Observatory
- High Altitude Venus Operational Concept
- High Altitude Water Cherenkov Experiment
- High Ambition Coalition
- High Definition Earth Viewing cameras
- High Earth orbit
- High Elevation Antarctic Terahertz Telescope
- High Endoatmospheric Defense Interceptor
- High Energy Astronomy Observatory 1
- High Energy Astronomy Observatory 3
- High Energy Stereoscopic System
- High Energy Transient Explorer
- High Flux Isotope Reactor
- High Hopes (Pink Floyd song)
- High Priest of Amun
- High Resolution Coronal Imager
- High Resolution Fly's Eye Cosmic Ray Detector
- High Resolution Microwave Survey
- High Resolution Stereo Camera
- High Resolution Wide Swath SAR imaging
- High Speed Photometer
- High Test Girls
- High Vacuum
- High Virgo
- High capacity oceanographic lithium battery pack
- High energy density physics
- High marsh
- High production volume chemicals
- High resistance connection
- High resolution electron energy loss spectroscopy
- High time-resolution astrophysics
- High voltage
- High water mark
- High-Energy Replicated Optics
- High-Enthalpy Arc Heated Facility
- High-G training
- High-Z Supernova Search Team
- High-altitude balloon
- High-altitude nuclear explosion
- High-confinement mode
- High-energy astronomy
- High-frequency Active Auroral Research Program
- High-intensity discharge lamp
- High-nutrient, low-chlorophyll regions
- High-power impulse magnetron sputtering
- High-resolution dynamics limb sounder
- High-resolution picture transmission
- High-throughput satellite
- High-velocity cloud
- Higher and Higher (The Moody Blues song)
- Higher-dimensional Einstein gravity
- Higher-dimensional supergravity
- Higher-spin theory
- Highland
- Highland Road Park Observatory
- Highland carrier
- Highlander II: The Quickening
- Highlander: The Animated Series
- Highly charged ion
- Highly elliptical orbit
- Hikaru Sulu
- Hilary Bailey
- Hilary Evans
- Hilbert (crater)
- Hilbert spectroscopy
- Hilda asteroid
- Hildegard (crater)
- Hildegarde
- Hilkka Rantaseppä-Helenius
- Hill (crater)
- Hill 305 (lunar mountain)
- Hill chain
- Hill sphere
- Hillary Montes
- Hillock
- Hills cloud
- Hills mechanism
- Hillslope evolution
- Hilmar Duerbeck
- Hilo (soil)
- Hilt's law
- Himalayan Geothermal Belt
- Himalayan owl
- Himalayas
- Himalia (moon)
- Himalia group
- Himawari (satellite)
- Himawari 8
- Himawari 9
- Himiko (Lyman-alpha blob)
- Hina (goddess)
- Hind (crater)
- Hind Al-Abadleh
- Hindu Kush
- Hindu astrology
- Hindu calendar
- Hindu units of time
- Hine-nui-te-pō
- Hines Ward
- Hinode (satellite)
- Hinoe uma
- Hinotori (satellite)
- Hinshelwood (crater)
- Hippalus (crater)
- Hipparchic cycle
- Hipparchus (Martian crater)
- Hipparchus (lunar crater)
- Hipparcos
- Hippasus
- Hippie Sabotage
- Hippie exploitation films
- Hippocamp (moon)
- Hippocrates (lunar crater)
- Hiram Perkins
- Hiranya Peiris
- Hiranyagarbha
- Hirayama (crater)
- Hirayama family
- Hirokazu Tanaka
- Hiroki Kosai
- Hiroshi Abe (astronomer)
- Hiroshi Araki
- Hiroshi Kaneda
- Hiroshi Matsumoto (engineer)
- Hiroshi Mori (astronomer)
- Hiroshige (crater)
- Hiroshima Children's Museum
- Hisaki (satellite)
- Hispasat
- Hispasat 1C
- Hispasat 30W-6
- Hispasat AG1
- Histoire Céleste Française
- Histoire Naturelle
- Historia Naturalis Brasiliae
- Historia naturalis bulgarica
- Historical astronomy
- Historical brightest stars
- Historical comet observations in China
- Historical models of the Solar System
- Historically significant lunar eclipses
- Historicist interpretations of the Book of Daniel
- History (The Verve song)
- History (short story)
- History Lesson
- History of Cartography Project
- History of Earth
- History of Geo- and Space Sciences
- History of Hindu Mathematics
- History of Mars observation
- History of Solar System formation and evolution hypotheses
- History of SpaceX
- History of X-ray astronomy
- History of astrology
- History of astronomy
- History of cartography
- History of classical mechanics
- History of climate change science
- History of flooding in Canada
- History of gamma-ray burst research
- History of general relativity
- History of geology
- History of geomagnetism
- History of geophysics
- History of gravitational theory
- History of ice drilling
- History of invertebrate paleozoology
- History of life
- History of longitude
- History of mineralogy
- History of numerical weather prediction
- History of paleontology
- History of paleontology in the United States
- History of soil science
- History of spaceflight
- History of speciation
- History of spectroscopy
- History of street lighting in the United States
- History of string theory
- History of sundials
- History of supernova observation
- History of the Big Bang theory
- History of the Deep Space Network
- History of the center of the Universe
- History of the forest in Central Europe
- History of the telescope
- History of timekeeping devices in Egypt
- Histosol
- Hit Man (1972 film)
- Hitchhiker 1
- Hitchhiker 2
- Hitchhiker Program
- Hitchin functional
- Hiten
- Hither Green railway station
- Hitler – Beast of Berlin
- Hitomaro (crater)
- Hitomi (satellite)
- Hiveswap
- Hiʻiaka (moon)
- Hjulström curve
- Hjúki and Bil
- Hoag's Object
- Hob Gadling
- Hoba meteorite
- Hobbs Observatory
- Hobbs meter
- Hobby–Eberly Telescope
- Hobo with a Shotgun
- Hocus Pocus (1993 film)
- Hod (Kabbalah)
- Hodge 301
- Hodgkins (crater)
- Hodoyoshi 1
- Hodoyoshi 3
- Hodoyoshi 4
- Hoffmeister (crater)
- Hogback (geology)
- Hogfather
- Hogg (crater)
- Hogland Series
- Hoher List Observatory
- Hohmann (crater)
- Hohmann transfer orbit
- Hokkaido Space Science and Technology Creation Center
- Hokuriku (train)
- Hokusai (crater)
- Hokusai quadrangle
- Hokutosei
- Holarctic realm
- Holbein (crater)
- Holberg (crater)
- Holden (Martian crater)
- Holden (lunar crater)
- Holding On for Life
- Holdrege (soil)
- Hole argument
- Holetschek (crater)
- Holeum
- Holger Pedersen (astronomer)
- Holger Thiele
- Holleford crater
- Hollow Earth
- Hollow Moon
- Hollow cathode effect
- Hollow-cathode lamp
- Hollows (Mercury)
- Holly Bush Inn, Makeney
- Holly Bush, Bollington
- Holly Ridings
- Hollywood Arms, Chelsea
- Hollywood Boulevard (1976 film)
- Hollywood Chainsaw Hookers
- Holmberg 15A
- Holmberg II
- Holmberg IX
- Holmdel Horn Antenna
- Holmes (crater)
- Holmesville Soil Series
- Holocaust (sacrifice)
- Holocene calendar
- Holocene glacial retreat
- Hologon
- Holographic grating
- Holographic interferometry
- Holographic principle
- Holoship
- Holst (crater)
- Holst action
- Holy Fire
- Holy Spirit Grotto
- Holy water
- Homayoun Seraji
- Hombre Lobo
- Home (2015 film)
- Home (nightclub chain)
- Home Army and V-1 and V-2
- Home Movies (TV series)
- Home Plate (Mars)
- Home cinema
- Home on Lagrange (The L5 Song)
- Homefront (Star Trek: Deep Space Nine)
- Homer (crater)
- Homer E. Newell Jr.
- Homer Hickam
- Homeric Minimum
- Homestake experiment
- Homestead (meteorite)
- Hometown Unicorn
- Homeward Bound (Turtledove novel)
- Homeworld
- Homeworld 2
- Homeworld: Cataclysm
- Homeworld: Deserts of Kharak
- Homicidal sleepwalking
- Hommel (crater)
- Homo Sol
- Homoclinal ridge
- Homocline
- Homological mirror symmetry
- Homosphere
- Homothetic vector field
- Homunculus Nebula
- Honcheonsigye
- Honey, I Shrunk the Audience!
- Honeycomb Nebula
- Honeycomb mirror
- Honeywell Primus
- Hong Kong Space Museum
- Hong Kum Lee
- Hong-Yee Chiu
- Hongjun Laozu
- Hong–Ou–Mandel effect
- Honi HaMe'agel
- Honor Among Enemies
- Honor in Vengeance II
- Honores Friderici
- Honoré Flaugergues
- Hoober Observatory
- Hood 2 Hood: The Blockumentary
- Hooke (Martian crater)
- Hooke (lunar crater)
- Hooker Glacier (New Zealand)
- Hooker Lake
- Hooker River
- Hooker Valley Track
- Hoop Conjecture
- Hoop and Grapes, Aldgate High Street
- Hoop and Grapes, Farringdon Street
- Hoops & Yoyo Ruin Christmas
- Hoot (film)
- Hop-tu-Naa
- Hope Bay
- Hope Black
- Hope and Anchor, Welham Green
- Hopi Buttes volcanic field
- Hopi mythology
- Hopi-Dart
- Hopkins Observatory
- Hopkins Ultraviolet Telescope
- Hopmann (crater)
- Hopper (crater)
- Hopper (spacecraft)
- Hora (astrology)
- Hora Ratna
- Hora Sara
- Horace (crater)
- Horace Parnell Tuttle
- Horace Price
- Horace W. Babcock
- Horary astrology
- Horatio (crater)
- Hordak
- Horizon
- Horizon (general relativity)
- Horizon problem
- Horizons Satellite
- Horizons-1
- Horizons-2
- Horizons-3e
- Horizons: Exploring the Universe
- Horizontal Environmental Genetic Alteration Agents
- Horizontal Falls
- Horizontal branch
- Horizontal coordinate system
- Horizontal position representation
- Horizontal situation indicator
- Hormesis
- Horn (Chinese constellation)
- Horndeski's theory
- Horned God
- Hornsby (crater)
- Horologium (constellation)
- Horologium in Chinese astronomy
- Horologium-Reticulum Supercluster
- Horoscope
- Horoscopic astrology
- Horowitz (crater)
- Horrebow (crater)
- Horrocks (crater)
- Horror Fiction in Seven Spooky Steps
- Horror Movie (song)
- Horror host
- Horrors of Spider Island
- Horse (zodiac)
- Horse Girl
- Horse latitudes
- Horse pond
- Horsehead Nebula
- Horseshoe orbit
- Horst (geology)
- Hortensius (crater)
- Horton overland flow
- Hosanna-Tabor Evangelical Lutheran Church & School v. Equal Employment Opportunity Commission
- Hospital bed
- Hosted payload
- Hot Bird 13B
- Hot Bird 13C
- Hot Bird 7
- Hot Docs Ted Rogers Cinema
- Hot Jupiter
- Hot Neptune
- Hot Package
- Hot Since 82
- Hot Streets (TV series)
- Hot Summer in the City
- Hot Wheels: AcceleRacers
- Hot band
- Hot cathode
- Hot dark matter
- Hot dry rock geothermal energy
- Hot spring
- Hot, dust-obscured galaxy
- Hotel Angel
- Hotel Deauville (Havana)
- Hotel Habana Riviera
- Hotel Sevilla
- Hotel Transylvania: The Series
- Hotel Tryp Habana Libre
- Hotel rating
- Hoth
- Hotspot (geology)
- Hotspot Ecosystem Research and Man's Impact On European Seas
- Hotspot Ecosystems Research on the Margins of European Seas
- Hottah (Mars)
- Houdek (soil)
- Hour angle
- Hour circle
- House (astrology)
- House of Aviance
- House of Shock (TV series)
- House of Suns
- House of Xtravaganza
- House of Yes (Brooklyn)
- Houssay (crater)
- Houston Museum of Natural Science
- Houston black (soil)
- Houston, We Have a Problem! (film)
- Houston, We've Got a Problem
- Houston, we have a problem
- Houtermans (crater)
- Houtermans Award
- Houzeau (crater)
- Hovnatanian (crater)
- How Did a Nice Girl Like You Get Into This Business?
- How Doth the Little Crocodile
- How I Killed Pluto and Why It Had It Coming
- How It Began
- How Sharper Than a Serpent's Tooth
- How We Went to Mars
- How the Earth Was Made
- How the Universe Works
- How to Make a Spaceship
- How to Stuff a Wild Bikini
- Howard Alan Smith
- Howard Browne
- Howard DeVore
- Howard Grubb
- Howard Harker
- Howard J. Brewington
- Howard Menger
- Howard P. Robertson
- Howard Stern television shows
- Howard Thomas Orville
- Howard Wolowitz
- Howard the Duck (film)
- Howard's Rock
- Howardite
- Howell Observatory
- Howl-O-Scream
- Howl-O-Scream (disambiguation)
- Howler monkey gods
- Hoyle–Narlikar theory of gravity
- Hořava–Lifshitz gravity
- Hořava–Witten domain wall
- Hrad Vallis
- Hradec Králové Observatory
- Hraschina meteorite
- Hrvoje Petek
- Hsu diffusion
- Hu (mythology)
- Hu Peiquan
- Huairou Solar Observing Station
- Huanjing (satellite)
- Huayco
- Hubbard Medal
- Hubble (crater)
- Hubble (film)
- Hubble Deep Field
- Hubble Deep Field South
- Hubble European Space Agency Information Centre
- Hubble Guide Star Catalog – Astrographic Catalog/Tycho
- Hubble Heritage Project
- Hubble Legacy Field
- Hubble Origins Probe
- Hubble Space Telescope
- Hubble Ultra-Deep Field
- Hubble bubble (astronomy)
- Hubble search for transition comets
- Hubble sequence
- Hubble volume
- Hubble's law
- Hubble: 15 Years of Discovery
- Hubble–Reynolds law
- Hubelmatt Observatory
- Hubert Anson Newton
- Hubert Reeves
- Hubertus Strughold
- Hubie Halloween
- Huchra's lens
- Huckitta (meteorite)
- Hudson (Aliens)
- Hudson River Museum
- Hudson Seaway
- Huemul Project
- Huerta
- Huge-LQG
- Huggins (Martian crater)
- Huggins (lunar crater)
- Hugh Couchman
- Hugh Downs
- Hugh Ernest Butler
- Hugh Hefner
- Hugh Percy Wilkins
- Hugh Ross (astrophysicist)
- Hughes Aircraft Company
- Hughes Network Systems
- Hughes–Drever experiment
- Huglin index
- Hugo (crater)
- Hugo Eckener
- Hugo Gernsback
- Hugo Gyldén
- Hugo de Garis
- Hugo von Seeliger
- Huib Bakker
- Huihui Lifa
- Huitaca (goddess)
- Hulbert Harrington Warner
- Hulk: Where Monsters Dwell
- Hull Zero Three
- Hulse–Taylor binary
- Human Is
- Human Lunar Return study
- Human Microbiome Project
- Human Research Facility Holter Monitor
- Human Research Program
- Human Space Flight Centre
- Human Systems Integration Division
- Human Torch
- Human analog missions
- Human geography
- Human impact on the nitrogen cycle
- Human microbiome
- Human mission to Mars
- Human outpost
- Human presence in space
- Human rights and climate change
- Human spaceflight
- Human uses of bats
- Human-rating certification
- Humanity Star
- Humanoids from the Deep
- Humason (crater)
- Humboldt (crater)
- Humboldt meridian
- Humboldtian science
- Hume (crater)
- Hume (soil)
- Hume Cronyn Memorial Observatory
- Hume's hawk-owl
- Humic substance
- Humidity
- Humidity Sounder for Brazil
- Humin
- Hummeln structure
- Humming Bird (train)
- Hummock
- Humpty Doo Hotel
- Humus
- Hun Kal (crater)
- Hun-Came Macula
- Hund's cases
- Hund's rules
- Hundred (novel series)
- Hundun
- Hungaria asteroid
- Hungarian Astronautical Society
- Hungarian Space Office
- Hungarian names in space
- Hungary
- Hunic superterrane
- Hunt for Exomoons with Kepler
- Hunter Prey
- Hunters (2020 TV series)
- Hunters of Dune
- Huntsville meridian
- Hunveyor
- Huo Hsing Vallis
- Huronian glaciation
- Hurricane (comics)
- Hurricane Dorian–Alabama controversy
- Hurricane Research Division
- Hurry On Sundown
- Husar-rover
- Husayn Kashifi
- Husband Hill
- HuskySat-1
- Hussey (crater)
- Hutt (Star Wars)
- Hutton (Martian crater)
- Hutton (lunar crater)
- Huxley (Martian crater)
- Huxley (lunar crater)
- Huygens (crater)
- Huygens (spacecraft)
- Huygens–Fresnel principle
- Huītzilōpōchtli
- Hvar Observatory
- Hvare-khshaeta
- Hwangto
- Hwanung
- Hwasong-13
- Hwasong-14
- Hwasong-15
- Hwasong-16
- Hy-V
- HySIS
- Hyacinthe de Bougainville
- Hyades (mythology)
- Hyades (star cluster)
- Hyades Stream
- Hyaloclastite
- Hyalopilitic
- Hybrid input output (HIO) algorithm for phase retrieval
- Hyde Memorial Observatory
- Hyde Park Picture House
- Hyder flare
- Hydra (constellation)
- Hydra (moon)
- Hydra Cluster
- Hydra in Chinese astronomy
- Hydra-Centaurus Supercluster
- Hydraotes Chaos
- Hydrargyrum medium-arc iodide lamp
- Hydrargyrum quartz iodide
- Hydraulic action
- Hydraulic conductivity
- Hydraulic diameter
- Hydraulic head
- Hydraulic redistribution
- Hydraulic tomography
- Hydric soil
- Hydrion paper
- HydroGeoSphere
- Hydroacoustics
- Hydrocarbon indicator
- Hydrocarbon poisoning
- Hydrodynamic escape
- Hydrofluoric acid burn
- Hydrogen
- Hydrogen Epoch of Reionization Array
- Hydrogen Intensity and Real-time Analysis eXperiment
- Hydrogen anion
- Hydrogen line
- Hydrogen spectral series
- Hydrogen-deficient star
- Hydrogenobacter
- Hydrogenotroph
- Hydrogen–deuterium exchange
- Hydrogeology Journal
- Hydrogeomorphology
- Hydrogeophysics
- Hydrograph
- Hydrographer of the Navy
- Hydrographic survey
- Hydrography
- Hydrography of Norte de Santander
- Hydrography of the San Francisco Bay Area
- Hydroinformatics
- Hydrologic Research Center (US)
- Hydrological Ensemble Prediction Experiment
- Hydrological code
- Hydrological optimization
- Hydrological transport model
- Hydrology
- Hydrology (agriculture)
- Hydrology in Practice
- Hydrology of Fishing Creek (North Branch Susquehanna River tributary)
- Hydrology of Switzerland
- Hydrology of the Catawissa Tunnel
- Hydrometeorology
- Hydrometry
- Hydropedology
- Hydrophobic soil
- Hydroseeding
- Hydrosphere
- Hydrostatic equilibrium
- Hydrostatic head
- Hydrothermal circulation
- Hydrothermal explosion
- Hydroxyl radical
- Hydrus
- Hydrus (software)
- Hydrus in Chinese astronomy
- Hyeronymus Sirturus
- Hyetograph
- Hygiea family
- Hygieostatic Bat Roost
- Hyginus (crater)
- Hyleg
- Hylocereus
- Hylocereus costaricensis
- Hylocereus megalanthus
- Hylocereus setaceus
- Hylogenesis
- Hymenobacter koreensis
- Hymenobacter psychrophilus
- Hymenobacter saemangeumensis
- Hymn to Enlil
- Hypanis Valles
- Hypatia
- Hypatia (crater)
- Hypatia (stone)
- Hyper Force
- Hyper Music/Feeling Good
- Hyper-Kamiokande
- Hyperbolic asteroid
- Hyperbolic motion (relativity)
- Hyperbolic trajectory
- Hyperboreae Undae
- Hypercane
- Hyperchromicity
- Hypercolor
- Hypercompact stellar system
- Hyperconcentrated flow
- Hypercone (spacecraft)
- Hyperdrive (British TV series)
- Hypergiant
- Hypergol Maintenance Facility
- Hypergravity
- Hyperion (Simmons novel)
- Hyperion (Titan)
- Hyperion (moon)
- Hyperion proto-supercluster
- Hypernauts
- Hypernova
- Hypersaline lake
- Hypersomnia
- Hypersonic Flight Experiment
- Hypersonic speed
- Hyperspace
- Hyperspace (film)
- Hyperspectral imaging
- Hyperspeed (video game)
- Hyperthermophile
- Hyperthermus
- Hypervelocity
- Hypervelocity Asteroid Intercept Vehicle
- Hyphomonas
- Hypnagogia
- Hypnic jerk
- Hypnogram
- Hypnopompic
- Hypnos
- Hypnotic
- Hypogene
- Hypogeum
- Hypogée des Dunes
- Hypolith
- Hypopnea
- Hyporheic zone
- Hypotheses non fingo
- Hypothetical astronomical object
- Hypothetical moon of Mercury
- Hypothetical star
- Hypothetical types of biochemistry
- Hypoxia (environmental)
- Hypoxia in fish
- Hypsibiidae
- Hypsibius
- Hypsochromic shift
- Hypsomata
- Hypsometric tints
- Hypsometry
- Hyron Spinrad
- Hyrrokkin (moon)
- Hysteria (Muse song)
- Hár (crater)
- Härjapea
- Hästens
- Hédervári (crater)
- Hélios 1B
- Hélène Courtois
- Hénon–Heiles system
- Hérodote
- Héroux-Devtek
- Hügelkultur
- Hügelland
- H₂éwsōs
- I Accuse My Parents
- I Adore Mi Amor
- I Aim at the Stars
- I Am a Camera
- I Am the Doorway
- I Aquarii
- I Bought a Vampire Motorcycle
- I Can Dream About You
- I Can Hardly Wait
- I Can't Live a Dream
- I Can't Sleep (song)
- I Carinae
- I Come in Peace
- I Dismember Mama
- I Downloaded a Ghost
- I Dream of Jeannie
- I Dreamed a Dream
- I Drink Your Blood
- I Eat Your Skin
- I Had the Craziest Dream
- I Have Dreamed (song)
- I Have a Dream (song)
- I Hear a New World
- I Just Wasn't Made for These Times (Defiance)
- I Like Dreamin'
- I Like Pumpkins
- I Lost My Heart to a Starship Trooper
- I Love Bees
- I Love to Singa
- I Put a Spell on You
- I See You (Theme from Avatar)
- I Sell the Dead
- I Shall Wear Midnight
- I Shot an Arrow into the Air
- I Spit on Your Grave (2010 film)
- I Spit on Your Grave 2
- I Spit on Your Grave: Deja Vu
- I Velorum
- I Was a Satellite of the Sun
- I Was a Teenage Werewolf
- I Will Fear No Evil
- I Zw 36
- I Zwicky 18
- I tabù n. 2
- I'll See You in My Dreams (1924 song)
- I'm Gonna Git You Sucka
- I'm Only Sleeping
- I'm So Tired
- I'm a King Bee
- I'm in Marsport Without Hilda
- I, Jedi
- I-1K
- I-2K
- I-3K
- I-4 satellite
- I-4K
- I-6K
- I-Space (Chinese company)
- I-Tree
- I-War (1997 video game)
- I. F. Clarke
- I. J. Good
- IACT
- IAMG Distinguished Lectureship
- IAR 111
- IAU (1976) System of Astronomical Constants
- IAU Circular
- IAU Working Group on Star Names
- IAU definition of planet
- IAU designated constellations
- IAU designated constellations by area
- IBM 1009
- IBM Blue Gene
- IBM Information Management System
- IBM RAD6000
- IBM System/4 Pi
- IC 10
- IC 1011
- IC 1101
- IC 1295
- IC 1337
- IC 1459
- IC 1517
- IC 1590
- IC 1613
- IC 167
- IC 1838
- IC 1953
- IC 1993
- IC 2006
- IC 2118
- IC 2149
- IC 2177
- IC 2220
- IC 2233
- IC 2391
- IC 2395
- IC 2448
- IC 2488
- IC 2497
- IC 2560
- IC 2574
- IC 2602
- IC 2714
- IC 289
- IC 2944
- IC 2955
- IC 3
- IC 335
- IC 3418
- IC 342
- IC 342/Maffei Group
- IC 348
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- IC 3583
- IC 405
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- IC 434
- IC 4406
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- IC 4499
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- IC 5201
- IC 5332
- IC 755
- IC 883
- ICAN-II
- ICARUS experiment
- ICBM address
- ICER
- ICES Journal of Marine Science
- ICESat
- ICESat-2
- ICEYE
- ICRANet
- ICstat
- ICube-1
- IDC (musician)
- IDL (programming language)
- IEA Solar Heating and Cooling Programme
- IEEE Geoscience and Remote Sensing Society
- IEEE Nuclear and Plasma Sciences Society
- IERS Reference Meridian
- IFAE
- IGO (software)
- IGR J11014−6103
- IGR J17091-3624
- IGR J17329-2731
- IHI Corporation
- II Lupi
- II Pegasi
- II Zwicky 28
- II Zwicky 73
- IIE iron meteorite
- IK Pegasi
- IK Tauri
- IKAROS
- ILC Dover
- ILR-33 AMBER
- ILWIS
- IM Normae
- IM Pegasi
- IMAGE (spacecraft)
- IMAGINE Photogrammetry
- IMBER
- IMS-1
- INAF
- INGEMMET
- INSAT-1A
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- INSAT-2DT
- INSAT-2E
- INSAT-3A
- INSAT-3B
- INSAT-3C
- INSAT-3D
- INSAT-3DR
- INSAT-3E
- INSAT-4A
- INSAT-4B
- INSAT-4C
- INSAT-4CR
- INSAT-4E
- INTA-100
- INTA-255
- INTA-300
- INTEGRAL
- INVADER
- INavsat consortium
- IOK-1
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- IPTF14atg
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- IPv4 address exhaustion
- IQ Aurigae
- IR/UV mixing
- IRAF
- IRAM 30m telescope
- IRAP PhD Program
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- IRAS
- IRAS 04509-6922
- IRAS 05280-6910
- IRAS 05437+2502
- IRAS 08544−4431
- IRAS 12063-6259
- IRAS 13224-3809
- IRAS 16293−2422
- IRAS 16295-29
- IRAS 17086-25
- IRAS 17163−3907
- IRAS 17423-1755
- IRAS 18162−2048
- IRAS 19475+3119
- IRAS 20324+4057
- IRAS 23304+6147
- IRC +10420
- IRC -10414
- IRC 0218
- IRIS (astronomical software)
- IRNSS-1A
- IRNSS-1B
- IRNSS-1C
- IRNSS-1D
- IRNSS-1E
- IRNSS-1F
- IRNSS-1G
- IRNSS-1H
- IRNSS-1I
- IRS-1A
- IRS-1B
- IRS-1C
- IRS-1D
- IRS-1E
- IRS-P2
- IRS-P3
- IRVINE01
- IRVINE02
- IRsweep
- ISC Kosmotras
- ISC3
- ISEE-1
- ISEE-2
- ISIS (satellite)
- ISIS Neutron and Muon Source
- ISO 9846
- ISOCHRON (spacecraft)
- ISOHDFS 27
- ISPRS Journal of Photogrammetry and Remote Sensing
- ISQUARE
- ISRO Pad Abort Test
- ISRO Propulsion Complex
- ISRO Satellite Integration and Testing Establishment
- ISRO spinoff technologies
- ISRO: A Personal History
- ISS ECLSS
- ISS National Lab
- ISS Propulsion Module
- ISS Space Sky Laser
- ISS year-long mission
- ISS-RapidScat
- ISSpresso
- ISTTOK
- ISight GPS
- ITC Enschede
- ITF-1
- ITOS-B
- ITOS-E
- ITUpSAT1
- IU Aurigae
- IX Carinae
- IXPE
- IXS Enterprise
- IZ Aquarii
- IZMIRAN
- Iah
- Iamblichus
- Ian Axford
- Ian Bartholomew (cricketer)
- Ian Crawford (astrobiologist)
- Ian Glass
- Ian Levine
- Ian Morison
- Ian Oswald
- Ian P. Griffin
- Ian Ridpath
- Ian Schrager
- Ian Shelton
- Ian Whates
- Iana (goddess)
- Iani Chaos
- Ianuarius
- Iapetus (moon)
- Iapygia quadrangle
- Iaso Tholus
- Iazu (crater)
- Ib Melchior
- Iberian cartography, 1400–1600
- Iberulite
- Iberus Vallis
- Ibn Al Hytham Islamic School
- Ibn Bajja (crater)
- Ibn Battuta (crater)
- Ibn Firnas (crater)
- Ibn Ishaq al-Tunisi
- Ibn Muʿādh al-Jayyānī
- Ibn Shuayb
- Ibn Tufail
- Ibn Yunus
- Ibn Yunus (crater)
- Ibn al-A'lam
- Ibn al-Adami
- Ibn al-Banna' al-Marrakushi
- Ibn al-Haytham
- Ibn al-Kammad
- Ibn al-Majdi
- Ibn al-Saffar
- Ibn al-Samh
- Ibn al-Shatir
- Ibn al‐Ha'im al‐Ishbili
- Ibn al‐Raqqam
- Ibn-Rushd (crater)
- Ibogaine
- Ibragimov (crater)
- Ibrahim Hazboun
- Ibrahim Khawas
- Ibrahim ibn Said al-Sahli
- Ibrahim ibn Sinan
- Ibrāhīm al-Fazārī
- Ibsen (crater)
- Icaria Fossae
- Icarus
- Icarus (crater)
- Icarus (journal)
- Icarus Interstellar
- Icarus at the Edge of Time
- Iccus of Taranto
- Ice
- Ice (Johnson novel)
- Ice Age: Collision Course
- Ice MC (rapper)
- Ice Planet (film)
- Ice Sheet Mass Balance Inter-comparison Exercise
- Ice Stupa
- Ice age
- Ice bridge
- Ice calving
- Ice cauldron
- Ice cloud
- Ice core
- Ice divide
- Ice drilling
- Ice dune
- Ice giant
- Ice jam
- Ice lens
- Ice planet
- Ice segregation
- Ice sheet
- Ice stream
- Ice tongue
- Ice volcano
- Ice-sheet dynamics
- Ice-sheet model
- IceCube (spacecraft)
- IceCube Neutrino Observatory
- Icebreaker Life
- Icehenge
- Iceland spar
- Iceway
- Iceworld
- Icko Iben
- Iconoclasts (video game)
- Ictinus (crater)
- Icy moon
- Id Tech 3
- Id Tech 4
- Ida Barney
- Ida Busbridge
- Ida Facula
- Idealized greenhouse model
- Idel'son (crater)
- Ideler (crater)
- Identification friend or foe
- Identification studies of UFOs
- Identity Within
- Ides of March
- Idiopathic hypersomnia
- Idit Zehavi
- Idle Days on the Yann
- Idris Elba
- If (Pink Floyd song)
- If I Can Dream
- If There Were No Benny Cemoli
- If You Had Wings
- Igaluk
- Igla (spacecraft docking system)
- Ignacio López de Ayala
- Ignacio María de Álava
- Ignatius L. Donnelly
- Ignatz Mühlwenzel
- Ignaz Venetz
- Ignazio Danti
- Igneous differentiation
- Ignimbrite
- Ignis Brunensis
- Ignisphaera
- Ignite the Dream, A Nighttime Spectacular of Magic and Light
- Ignition City
- Ignitron
- Igor (crater)
- Igor Dmitriyevich Novikov
- Igor Volk
- Igor Volke
- Ijiraq (moon)
- Ijon Tichy
- Ijon Tichy: Space Pilot
- Ikar (rocket stage)
- Ike & Tina Turner
- Ike Bloom
- Iker Jiménez
- Ikonos
- Il dio serpente
- Il disco volante
- Il mondo della luna
- Il mondo della luna (Avondano)
- Il mondo della luna (Galuppi)
- Il neige sur Liège
- Il'in (crater)
- Ilan Ramon
- Ilan Ramon Youth Physics Center
- Ilargi
- Ilisos
- Ilium (novel)
- Ilium/Olympos
- Illegal Aliens (film)
- Illinois Public Interest Research Group
- Illinois Soil Nitrogen Test
- Illinois lunar sample displays
- Illness and injuries during spaceflight
- IllumiNations
- IllumiNations: Reflections of Earth
- Illuminae
- Illusion of Gaia
- Illustrative model of greenhouse effect on climate change
- Illustrators of Alice's Adventures in Wonderland
- Illustris project
- Illuvium
- Ilmarë (moon)
- Ilsa, Harem Keeper of the Oil Sheiks
- Ilsa, She Wolf of the SS
- Ilsa, the Tigress of Siberia
- Ilsa, the Wicked Warden
- Ilse Cleeves
- Ilumetsa crater
- Ilyinets crater
- Imad Barghouthi
- Image subtraction
- Image-forming optical system
- Image-stabilized binoculars
- Imagery intelligence
- Images in a Convent
- Imagine... A Fantasy in the Sky
- Imaging spectrometer
- Imaging spectroscopy
- Imaginum
- Imago Mundi
- Imago Universi
- Imai (star)
- Imam Khomeini Spaceport
- Imatra (cinema)
- Imbrian
- Imhotep (crater)
- Imidogen
- Imilac
- Immanuel Bonfils
- Immanuel Velikovsky
- Immirzi parameter
- Immobilization (soil science)
- Immortality Drive
- Immunotoxicology
- Imogolite
- Impact (miniseries)
- Impact (novel)
- Impact Field Studies Group
- Impact crater
- Impact crater lake
- Impact depth
- Impact event
- Impact gardening
- Impact structure
- Impact survival
- Impact winter
- Impactite
- Imperial (SP train)
- Imperial Earth
- Imperial Moon
- Imperium Galactica
- Imperium Galactum
- Impervious surface
- Implied Spaces
- Impostor (2001 film)
- Imprelis
- Improved Orion
- Impurity
- Imre Friedmann
- Imre Izsák
- Imum coeli
- In Dreams (Howard Shore song)
- In Dreams (Roy Orbison song)
- In Saturn's Rings
- In Search of Aliens
- In a Mirror, Darkly
- In situ capping of subaqueous waste
- In situ chemical reduction
- In situ resource utilization
- In the Courts of the Crimson Kings
- In the Days of the Comet
- In the Flesh?
- In the Light of the Moon
- In the Mouth of the Whale
- In the Ocean of Night
- In the Pines
- In the Shadow of the Moon (2007 film)
- In the Shadow of the Moon (book)
- In the Walls of Eryx
- In vitro toxicology
- In vivo magnetic resonance spectroscopy
- In-Young Ahn
- In-space propulsion technologies
- InSight
- InXitu
- Ina (crater)
- Inanna
- Inbred (film)
- Inca (video game)
- Inca II: Wiracocha
- Inca Roads (song)
- Inception
- Inceptisol
- Inclination instability
- Inclined orbit
- Incoherent broad-band cavity-enhanced absorption spectroscopy
- Incompatible element
- Inconstant Moon
- Inconstant Star
- Incubation (ritual)
- Incubus
- Incursion
- Independence Day (1996 film)
- Independence Day (book series)
- Independence Day (franchise)
- Independence Day (video game)
- Independence Day UK
- Independence Day: Resurgence
- Independence High School (San Jose, California)
- Independence War 2: Edge of Chaos
- Independence-X Aerospace
- Independent movie theater
- Index (crater)
- Index Catalogue of Visual Double Stars
- Index of Earth science articles
- Index of biological integrity
- Index of drinking establishment–related articles
- Index of geology articles
- Index of meteorology articles
- Index of soil-related articles
- Index of solar energy articles
- Index of ufology articles
- Index to Marine & Lacustrine Geological Samples
- India Climate Collaborative
- India Meteorological Department
- India-based Neutrino Observatory
- Indian Astronomical Observatory
- Indian Centre for Space Physics
- Indian Data Relay Satellite System
- Indian Deep Space Network
- Indian Geophysical Union
- Indian Hills Theater
- Indian Human Spaceflight Programme
- Indian Initiative in Gravitational-wave Observations
- Indian Institute of Astrophysics
- Indian Institute of Remote Sensing
- Indian Institute of Soil Science
- Indian Institute of Space Science and Technology
- Indian Mini Satellite bus
- Indian National Centre for Ocean Information Services
- Indian National Committee for Space Research
- Indian National Space Promotion and Authorisation Centre
- Indian Network on Climate Change Assessment
- Indian Ocean
- Indian Ocean Experiment
- Indian Regional Navigation Satellite System
- Indian Remote Sensing Programme
- Indian Shield
- Indian Society for Ecological Economics
- Indian Society of Remote Sensing
- Indian Space Research Organisation
- Indian Space Science Data Centre
- Indian Youth Climate Network
- Indian astronomy
- Indian environmental law
- Indian meridian
- Indian national calendar
- Indiana Asteroid Program
- Indiana Jones and the Kingdom of the Crystal Skull
- Indiana Space Grant Consortium
- Indiana Theatre (Indianapolis)
- Indiana University Bloomington
- Indicative limit value
- Indicator bacteria
- Indiction
- Indigenous (ecology)
- Indigenous mapping
- Indigo carmine
- Indiplon
- Indira Gandhi Planetarium
- Indirect DNA damage
- Individual action on climate change
- Indo-Pacific
- IndoStar-1
- Indochinite
- Indomalayan realm
- Indra
- Induced gravity
- Induction coil
- Induction plasma
- Inductively coupled plasma
- Inductively coupled plasma atomic emission spectroscopy
- Indus (constellation)
- Indus Vallis
- Indus in Chinese astronomy
- Industrial ecology
- Industrial waste
- Industrial wastewater treatment
- Ineke De Moortel
- Inelastic neutron scattering
- Inert gas
- Inert gas asphyxiation
- Inertial Stellar Compass
- Inertial Upper Stage
- Inertial confinement fusion
- Inertial electrostatic confinement
- Inertial frame of reference
- Inertial fusion power plant
- Inertial navigation system
- Inertial reference unit
- Inertialess drive
- Inex
- Infant bed
- Infant crying
- Infant sleep training
- Infantile apnea
- Inferior and superior planets
- Inferno (video game)
- Inferno!
- Infestation (comics)
- Infestation 2
- Infiltration (hydrology)
- Infiltration basin
- Infiltration gallery
- Infiltration/Inflow
- Infiltrometer
- Infinite Ryvius
- Infinite Space
- Infinite Undiscovery
- Infinite Worlds (book)
- Infinite derivative gravity
- Infinite-axis telescope
- Infinity (philosophy)
- Infinity (upcoming video game)
- Infinity's Shore
- Inflatable Antenna Experiment
- Inflatable space habitat
- InflateSail
- Inflation (cosmology)
- Inflationary epoch
- Inflaton
- Inflow (hydrology)
- Infomercials (TV specials)
- Information Center for Dangerous Goods
- Information Gathering Satellite
- Information display systems
- Information ecology
- Information panspermia
- Infoterra Ltd
- Infrared Array Camera
- Infrared Optical Telescope Array
- Infrared Science Archive
- Infrared Space Observatory
- Infrared Spatial Interferometer
- Infrared Spectrometer for ExoMars
- Infrared astronomy
- Infrared atmospheric sounding interferometer
- Infrared cirrus
- Infrared compact catalogue
- Infrared dark cloud
- Infrared excess
- Infrared interferometer spectrometer and radiometer
- Infrared photodissociation spectroscopy
- Infrared spectroscopy
- Infrared spectroscopy correlation table
- Infrared telescope
- Infrared window
- Infusion (band)
- Inga (film)
- Ingagi
- Ingalls (crater)
- Ingalls Shipbuilding
- Inghirami (crater)
- Inglis–Teller equation
- Ingram Planetarium
- Ingression coast
- Ingrid Stairs
- Ingrid van Houten-Groeneveld
- Ingta Formation
- Inguma
- Inhalant
- Inhomogeneous cosmology
- Inhumans (TV series)
- Initial mass function
- Initial singularity
- Initial value formulation (general relativity)
- Initiative for Interstellar Studies
- Injection well
- Injun (satellite)
- Inktomi (crater)
- Inland salt marsh
- Inland sea (geology)
- Inlet
- Inmarsat
- Inmarsat-3 F4
- Inmarsat-4 F1
- Inmarsat-4 F3
- Inmarsat-4A F4
- Inmarsat-6 F1
- Inn sign
- Inner core super-rotation
- Inner moon
- Innermost inner core
- Innermost stable circular orbit
- Innes (crater)
- Innes' star
- Innocence (Star Trek: Voyager)
- Innocent When You Dream (song)
- Innovative Interstellar Explorer
- Innovative Satellite Technology Demonstration-1
- Innovative Solutions In Space
- Innovative Space-based Radar Antenna Technology
- Innoventions (Disneyland)
- Innsbruck Observatory
- Insanely Twisted Shadow Planet
- Insect Habitat
- Insect collecting
- Insectoid
- Insel orogeny
- Inseminoid
- Insheim Geothermal Power Station
- Inside GNSS
- Insight Guides
- Insomnia
- Insomnia (Daya song)
- Insomnia (Faithless song)
- Inspiration Mars Foundation
- Instability
- Instability strip
- Institut Pierre Simon Laplace
- Institut d'astrophysique de Paris
- Institut de radioastronomie millimétrique
- Institut für Meereskunde Kiel
- Institut océanographique
- Institute for Advanced Sustainability Studies
- Institute for Astronomy (Hawaii)
- Institute for Astronomy and Astrophysics
- Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing
- Institute for Biodiversity and Environmental Research
- Institute for Chemistry and Biology of the Marine Environment
- Institute for Computational Cosmology
- Institute for Cosmic Ray Research
- Institute for Earth System Preservation
- Institute for Environmental Solutions
- Institute for Functional Imaging of Materials
- Institute for Plasma Research
- Institute for Solar Physics
- Institute for Space Applications and Remote Sensing
- Institute for Theoretical Atomic, Molecular and Optical Physics
- Institute of Aerospace Medicine
- Institute of Air Quality Management
- Institute of Astronomy of the Bulgarian Academy of Sciences
- Institute of Astronomy, Cambridge
- Institute of Astronomy, NCU
- Institute of Atmospheric Physics AS CR
- Institute of Cosmology and Gravitation, University of Portsmouth
- Institute of Ecotechnics
- Institute of Geomatics
- Institute of Geophysics
- Institute of Hydrology, Meteorology and Environmental Studies (Colombia)
- Institute of Materials, Minerals and Mining
- Institute of Physics Edward Appleton Medal and Prize
- Institute of Soil Science and Agrochemistry
- Institute of Space Propulsion
- Institute of Space Technology
- Institute of Space and Astronautical Science
- Institute of Space and Planetary Astrophysics
- Institute of Space and Telecommunications Law
- Institute of Theoretical Astrophysics
- Institute of the Right of Peace and Development - IDPD
- Institution of Environmental Sciences
- Institution of Mining and Metallurgy
- Instituto Nacional de Técnica Aeroespacial
- Instituto de Astrofísica de Andalucía
- Instituto de Astrofísica de Canarias
- Instituto de Astronomía Teórica y Experimental
- Instituto de Plasmas e Fusão Nuclear
- Instream use
- Instrument Neutral Distributed Interface
- Instrument flight rules
- Instrument landing system
- Instrument of the Primum Mobile
- Instrumental magnitude
- Insulantarctica
- Insular biogeography
- Int-Ball
- Intasat
- Integral energy
- Integral field spectrograph
- Integrated Applications Promotion
- Integrated Biosphere Simulator
- Integrated Data Viewer
- Integrated Flux Nebula
- Integrated Forecast System
- Integrated Lander Vehicle
- Integrated Ocean Drilling Program
- Integrated Ocean Observing System
- Integrated Overhead SIGINT Architecture
- Integrated Powerhead Demonstrator
- Integrated Science Instrument Module
- Integrated Science Investigation of the Sun
- Integrated Software for Imagers and Spectrometers
- Integrated Space Cell
- Integrated Truss Structure
- Integrated assessment modelling
- Integrated cargo carrier
- Integrated catchment management
- Integrated coastal zone management
- Integrated geography
- Integrated modification methodology
- Integrated modular avionics
- Integrated multi-trophic aquaculture
- Integrated pest management
- Integration of traffic data with navigation systems
- Intel Array Visualizer
- Intelligent falling
- Intelligent street lighting
- Intelsat
- Intelsat 10-02
- Intelsat 11
- Intelsat 14
- Intelsat 15
- Intelsat 16
- Intelsat 19
- Intelsat 1R
- Intelsat 2
- Intelsat 20
- Intelsat 21
- Intelsat 22
- Intelsat 23
- Intelsat 24
- Intelsat 26
- Intelsat 27
- Intelsat 28
- Intelsat 29e
- Intelsat 33e
- Intelsat 34
- Intelsat 35e
- Intelsat 36
- Intelsat 3R
- Intelsat 5
- Intelsat 601
- Intelsat 602
- Intelsat 603
- Intelsat 604
- Intelsat 605
- Intelsat 701
- Intelsat 702
- Intelsat 704
- Intelsat 705
- Intelsat 706
- Intelsat 707
- Intelsat 708
- Intelsat 709
- Intelsat 8
- Intelsat 801
- Intelsat 802
- Intelsat 804
- Intelsat 805
- Intelsat 9
- Intelsat 901
- Intelsat 902
- Intelsat 903
- Intelsat 904
- Intelsat 905
- Intelsat 906
- Intelsat 907
- Intelsat Americas
- Intelsat I
- Intelsat II F-1
- Intelsat II F-2
- Intelsat II F-3
- Intelsat II F-4
- Intelsat III F-1
- Intelsat III F-2
- Intelsat III F-3
- Intelsat III F-4
- Intelsat III F-5
- Intelsat III F-6
- Intelsat III F-7
- Intelsat III F-8
- Intelsat IV F-1
- Intelsat IV F-2
- Intelsat IV F-3
- Intelsat IV F-4
- Intelsat IV F-5
- Intelsat IV F-6
- Intelsat IV F-7
- Intelsat IV F-8
- Intelsat IVA F-1
- Intelsat IVA F-2
- Intelsat IVA F-3
- Intelsat IVA F-4
- Intelsat IVA F-5
- Intelsat IVA F-6
- Intelsat K
- Intelsat V F-1
- Intelsat V F-2
- Intelsat V F-3
- Intelsat V F-4
- Intelsat V F-5
- Intelsat V F-6
- Intelsat V F-7
- Intelsat V F-8
- Intelsat V F-9
- Intelsat VA F-10
- Intelsat VA F-11
- Intelsat VA F-12
- Intelsat VA F-13
- Intelsat VA F-14
- Intelsat VA F-15
- Intelsat VI
- Intense Pulsed Neutron Source
- Intensity (physics)
- Intensity (video game)
- Intensity interferometer
- Intensity mapping
- Intensive crop farming
- Inter caetera
- Inter-Agency Space Debris Coordination Committee
- Inter-Range Instrumentation Group
- Inter-Services Topographic Department
- Inter-University Centre for Astronomy and Astrophysics
- Inter-crater plains on Mercury
- InterPlaNet
- InterPlanetary Network
- InterRidge
- Interacting binary star
- Interacting galaxy
- Interactive visualization
- Interagency GPS Executive Board
- Interbasin transfer
- Interbol
- Intercalary month (Egypt)
- Intercept method
- Interception (water)
- Interchange instability
- Intercontinental ballistic missile
- Interdimensional being
- Interdimensional hypothesis
- Interdunal wetland
- Interesting Times
- Interface Region Imaging Spectrograph
- Interference (novel)
- Interference ripples
- Interferometric microscopy
- Interferometric synthetic-aperture radar
- Interferometric visibility
- Interferometry
- Interflow
- Intergalactic dust
- Intergalactic star
- Intergalactic travel
- Interim Control Module
- Interior Characterization of Europa using Magnetometry
- Interior Low Plateaus
- Interior Schwarzschild metric
- Interkosmos
- Interlake
- Interlocking spur
- Intermediate General Circulation Model
- Intermediate eXperimental Vehicle
- Intermediate long-fingered bat
- Intermediate luminosity optical transient
- Intermediate polar
- Intermediate slit-faced bat
- Intermediate spiral galaxy
- Intermediate-Current Stability Experiment
- Intermediate-mass black hole
- Intermediate-range ballistic missile
- Intermontane
- Internal conversion (chemistry)
- Internal drainage board
- Internal heating
- Internal structure of the Moon
- Internal tide
- Internal waters
- International (Amtrak train)
- International Academy of Astronautics
- International Arctic Research Center
- International Association for Engineering Geology and the Environment
- International Association for the Advancement of Space Safety
- International Association for the Physical Sciences of the Oceans
- International Association of Astronomical Artists
- International Association of Cryospheric Sciences
- International Association of Geoanalysts
- International Association of Geodesy
- International Association of Hydrological Sciences
- International Association of Meteorology and Atmospheric Sciences
- International Association of People-Environment Studies
- International Association of Seismology and Physics of the Earth's Interior
- International Association of Space Activities Participants
- International Association of Volcanology and Chemistry of the Earth's Interior
- International Astrology Day
- International Astronautical Congress
- International Astronautical Federation
- International Astronomical Union
- International Astronomical Youth Camp
- International Astronomy Olympiad
- International Astrostatistics Association
- International Atomic Time
- International Berthing and Docking Mechanism
- International Biological Program
- International Cartographic Association
- International Celestial Reference Frame
- International Celestial Reference System
- International Center for Relativistic Astrophysics
- International Centre for Diffraction Data
- International Centre for Geohazards
- International Centre for Radio Astronomy Research
- International Charter 'Space and Major Disasters'
- International Classification of Sleep Disorders
- International Code of Area Nomenclature
- International Cometary Explorer
- International Commission on Stratigraphy
- International Commission on the History of Geological Sciences
- International Committee on Anthropogenic Soils
- International Comprehensive Ocean-Atmosphere Data Set
- International Conference on Environmental Systems
- International Conference on Green Chemistry
- International Continental Scientific Drilling Program
- International Cosmos Prize
- International Dark-Sky Association
- International Day of Human Space Flight
- International Designator
- International Docking Adapter
- International Docking System Standard
- International Earth Rotation and Reference Systems Service
- International Express
- International Federation of Surveyors
- International Geodetic Student Organisation
- International Geology Review
- International Geophysical Year
- International Geoscience Programme
- International Geosphere-Biosphere Programme
- International Glaciological Society
- International Halley Watch
- International Heliophysical Year
- International Humic Substances Society
- International Hydrographic Organization
- International Institute of Air and Space Law
- International Institute of Space Commerce
- International Journal of Applied Earth Observation and Geoinformation
- International Journal of Astrobiology
- International Journal of Biometeorology
- International Journal of Climatology
- International Journal of Digital Earth
- International Journal of Earth Sciences
- International Journal of Environmental Research
- International Journal of Environmental Science and Technology
- International Journal of Geographical Information Science
- International Journal of Greenhouse Gas Control
- International Journal of Remote Sensing
- International Journal of Speleology
- International Journal of Urban and Regional Research
- International Latitude Observatory
- International Launch Services
- International Lunar Exploration Working Group
- International Lunar Network
- International Lunar Observatory
- International Lunar Resources Exploration Concept
- International Magnetospheric Study
- International Map Industry Association
- International Mars Exploration Working Group
- International Meteor Organization
- International Meteorological Organization
- International Meteorological Organization Prize
- International Mineralogical Association
- International Mobile Satellite Organization
- International Muon Ionization Cooling Experiment
- International Near-Earth Asteroid Survey
- International Olympiad on Astronomy and Astrophysics
- International Permafrost Association
- International Planetarium Society
- International Planetary Data Alliance
- International Planetary Patrol Program
- International Polar Year
- International Programme on the State of the Ocean
- International Pulsar Timing Array
- International Reference Ionosphere
- International Scientific Optical Network
- International Society for Ecological Economics
- International Society for Environmental Epidemiology
- International Society for Environmental Ethics
- International Society for Photogrammetry and Remote Sensing
- International Society of Limnology
- International Soil Reference and Information Centre
- International Solar-Terrestrial Physics Science Initiative
- International Space Development Conference
- International Space Education Institute
- International Space Orchestra
- International Space Science Institute
- International Space Settlement Design Competition
- International Space Station
- International Space Station Multilateral Coordination Board
- International Space Station programme
- International Space Year
- International Standard Atmosphere
- International Standard Payload Rack
- International Star Registry
- International Symposium for Personal and Commercial Spaceflight
- International UFO Museum and Research Center
- International Ultraviolet Explorer
- International Union for Cooperation in Solar Research
- International Union for Quaternary Research
- International Union for Vacuum Science, Technique and Applications
- International Union of Geodesy and Geophysics
- International Union of Geological Sciences
- International Union of Soil Sciences
- International Virtual Observatory Alliance
- International Volcanic Ashfall Impacts Working Group
- International Volcanic Health Hazard Network
- International X-ray Observatory
- International Year of Astronomy
- International Year of Biodiversity
- International Year of Planet Earth
- International Year of Soil
- International communication
- International community
- International trade and water
- Internet Routing in Space
- Interobject
- Interorbital Systems
- Interplanetary Flight: An Introduction to Astronautics
- Interplanetary Internet
- Interplanetary Nano-Spacecraft Pathfinder in Relevant Environment
- Interplanetary Scintillation Array
- Interplanetary Transport Network
- Interplanetary contamination
- Interplanetary dust cloud
- Interplanetary magnetic field
- Interplanetary medium
- Interplanetary scintillation
- Interplanetary spaceflight
- Interpretation of Dreams (Antiphon)
- Interpretations of 2001: A Space Odyssey
- Interruption (map projection)
- Intersolar
- Intersputnik
- Interstate Express
- Interstella 5555: The 5tory of the 5ecret 5tar 5ystem
- Interstellar (film)
- Interstellar Boundary Explorer
- Interstellar Low Ways
- Interstellar Mapping and Acceleration Probe
- Interstellar Overdrive
- Interstellar Probe (1999)
- Interstellar Technologies
- Interstellar ark
- Interstellar cloud
- Interstellar communication
- Interstellar formaldehyde
- Interstellar ice
- Interstellar medium
- Interstellar object
- Interstellar probe
- Interstellar travel
- Interstellar war
- Interster
- Intertidal wetland
- Intertidal zone
- Intervalence charge transfer
- Intervertebral disc damage and spaceflight
- Inti
- Intihuatana
- Intihuatana, Urubamba
- Intimacies of a Prostitute
- Into That Silent Sea
- Into the Comet
- Into the Stars
- Into the Void (Black Sabbath song)
- Into the Void (video game)
- Intra-arc basin
- Intraclasts
- Intracluster medium
- Intrasporangiaceae
- Intratracheal instillation
- Intrinsically photosensitive retinal ganglion cell
- Introduction to M-theory
- Introduction to Outer Space
- Introduction to Statistics (Community)
- Introduction to general relativity
- Introduction to the mathematics of general relativity
- Intruders (miniseries)
- Intrusive Suite of Buena Vista Crest
- Intrusive Suite of Sonora Pass
- Intrusive Suite of Yosemite Valley
- Intrusive rock
- Intrusive suite
- Intuitive Machines
- Inuit astronomy
- Inundation
- Inuvik (crater)
- Invader Zim
- Invader Zim (comics)
- Invaders from Mars (1953 film)
- Invaders from Mars (1986 film)
- Invariable plane
- Invasion (2020 film)
- Invasion (American TV series)
- Invasion (miniseries)
- Invasion America
- Invasion of Astro-Monster
- Invasion of the Body Snatchers
- Invasion of the Body Snatchers (1978 film)
- Invasion of the Cat-People
- Invasion! (Arrowverse)
- Invasion: Earth (TV series)
- Inverness Corona
- Inverse photoemission spectroscopy
- Inverse synthetic-aperture radar
- Inversion temperature
- Inversions (novel)
- Invertebrate drift
- Inverted Earth
- Inverted relief
- Inverted river delta
- Invincible (Muse song)
- Invisible Woman
- Io (moon)
- Io Volcano Observer
- Iocaste (moon)
- Iodine Satellite
- Ioffe (crater)
- Ion Hobana
- Ion acoustic wave
- Ion beam
- Ion cyclotron resonance
- Ion of Chios
- Ion thruster
- Ion wind
- Ion-beam shepherd
- Ionization cone
- Ionization instability
- Ionized-air glow
- Ionochromism
- Ionosat-Micro
- Ionosonde
- Ionosphere
- Ionosphere-Thermosphere Storm Probes
- Ionospheric Connection Explorer
- Ionospheric Occultation Experiment
- Ionospheric absorption
- Ionospheric dynamo region
- Ionospheric heater
- Ionospheric pierce point
- Ionospheric sounding
- Ionospheric storm
- Iosif Shklovsky
- Iota Andromedae
- Iota Antliae
- Iota Apodis
- Iota Aquarii
- Iota Aquilae
- Iota Arae
- Iota Arietis
- Iota Aurigae
- Iota Boötis
- Iota Cancri
- Iota Canis Majoris
- Iota Capricorni
- Iota Carinae
- Iota Cassiopeiae
- Iota Centauri
- Iota Cephei
- Iota Ceti
- Iota Chamaeleontis
- Iota Coronae Borealis
- Iota Crateris
- Iota Crucis
- Iota Cygni
- Iota Delphini
- Iota Draconis
- Iota Draconis b
- Iota Eridani
- Iota Fornacis
- Iota Geminorum
- Iota Gruis
- Iota Herculis
- Iota Horologii
- Iota Horologii b
- Iota Hydrae
- Iota Leonis
- Iota Leporis
- Iota Librae
- Iota Lupi
- Iota Lyrae
- Iota Microscopii
- Iota Muscae
- Iota Normae
- Iota Ophiuchi
- Iota Orionis
- Iota Pegasi
- Iota Persei
- Iota Phoenicis
- Iota Pictoris
- Iota Piscis Austrini
- Iota Piscium
- Iota Reticuli
- Iota Sagittarii
- Iota Scorpii
- Iota Sculptoris
- Iota Serpentis
- Iota Tauri
- Iota Telescopii
- Iota Trianguli
- Iota Trianguli Australis
- Iota Tucanae
- Iota Ursae Majoris
- Iota Virginis
- Iota Volantis
- Iota1 Cygni
- Iota1 Librae
- Iota1 Muscae
- Iota1 Normae
- Iota1 Scorpii
- Iota2 Cygni
- Iota2 Fornacis
- Iota2 Muscae
- Iota2 Normae
- Iota2 Scorpii
- Iovantucarus
- Ipomoea alba
- Ipomoea violacea
- Iqbal Ahmed
- Ira Abbott
- Ira Sprague Bowen
- Iran Aviation Industries Organization
- Iranian National Observatory
- Iranian Plateau
- Iranian Space Agency
- Iranian Space Research Center
- Iranian crewed spacecraft
- Irasema Alcántara-Ayala
- Irazú (satellite)
- Irem Y. Tumer
- Irene D. Long
- Irene Schloss
- Irene Scruggs
- Irene Sänger-Bredt
- Irensaga Montes
- Iridium
- Iridium 33
- Iridium 7
- Iridium 77
- Iridium Communications
- Iridium Jazz Club
- Iridium anomaly
- Iridium satellite constellation
- Irina Belskaya
- Irina Solovyova
- Iris Nebula
- Irish Astronomical Society
- Irish Federation of Astronomical Societies
- Irish Pub, Kabul
- Irish Sea Glacier
- Irish Transverse Mercator
- Irma's injection
- Irnini Mons
- Iron Duke (pub)
- Iron Foot Jack
- Iron Gold
- Iron Invader
- Iron Man
- Iron Man (Buddhist statue)
- Iron Man Experience
- Iron Seed
- Iron Sky
- Iron Sky: Invasion
- Iron Sky: The Coming Race
- Iron catastrophe
- Iron cycle
- Iron fertilization
- Iron group
- Iron nanoparticle
- Iron peak
- Iron planet
- Iron snow
- Iron star
- Iron-oxidizing bacteria
- Ironwood Theatre
- Iron–nickel alloy
- Irradiance
- Irregular galaxy
- Irregular mare patch
- Irregular moon
- Irregular sleep–wake rhythm
- Irregular variable
- Irrigation
- Irrigation scheduling
- Irumide Belt
- Irv Docktor
- Irvin Kershner
- Irvine CubeSat STEM Program
- Irvine–Michigan–Brookhaven (detector)
- Irving Johnson
- Irving Plaza
- Irwin I. Shapiro
- Irwin screen
- Is There Anybody Out There?
- Is There Sex After Death?
- Isa Kelemechi
- Isaac Albalia
- Isaac Argyros
- Isaac Asimov
- Isaac Asimov's Guide to Earth and Space
- Isaac Fletcher (MP)
- Isaac Habrecht II
- Isaac Israeli ben Joseph
- Isaac Newton
- Isaac Newton Group of Telescopes
- Isaac Newton Telescope
- Isaac Newton's occult studies
- Isaac Perrins
- Isaac Roberts
- Isaac Roberts' Observatory
- Isaac ibn Sid
- Isaac ibn al-Ahdab
- Isabella (crater)
- Isabella M. Gioia
- Isadore Epstein
- Isaev (crater)
- Isaiah 14
- Isambard Owen
- Isan orogeny
- Isbanir Fossa
- Ise Grand Shrine
- Isfahan Observatory
- Ishirō Honda
- Ishtar Terra
- Isidis Planitia
- Isidor Isaac Rabi
- Isidore of Seville
- Isidorus (crater)
- Isis (lunar crater)
- Isis Pogson
- Islam and astrology
- Island Arc (journal)
- Island Lagoon Tracking Station
- Islands in the Sky
- Islands in the Sky: Bold New Ideas for Colonizing Space
- Islands of Space
- Isle of Skye (bar)
- Isle of the Dead (Zelazny novel)
- Isles of Scilly
- Islet
- Ismail Mustafa al-Falaki
- Ismail Patel
- Ismenius Lacus quadrangle
- Iso-Heikkilä Observatory
- Iso-Naakkima
- Isoazimuth
- Isobutanol
- Isobutyronitrile
- Isogenous series
- Isohypsibius
- Isoinertial
- Isolated horizon
- Isoline retrieval
- Isomeric shift
- Isonoe (moon)
- Isopach map
- Isoplanetic patch
- Isoptericola halotolerans
- Isopycnic
- Isosbestic point
- Isostasy
- Isostatic depression
- Isotope hydrology
- Isotopic labeling
- Isotopic shift
- Isotropic beacon
- Isotropic coordinates
- Ispace (Japanese company)
- Israel Meteorological Service
- Israel Space Agency
- Israeli Astronomical Association
- Israeli Geographical Association
- Israeli Nano Satellite Association
- Issus Aussaguel
- Istakhri
- Istanbul UFO Museum
- Istanbul University Observatory
- Istanbul fireworks disaster
- Ister Chaos
- Istituto di Radioastronomia di Bologna
- Istrebitel Sputnikov
- Isuzu
- It Conquered the World
- It Hurts
- It Would Be So Nice
- It! The Terror from Beyond Space
- It's Halloween
- It's Only Rock & Roll (TV series)
- It's a Bikini World
- It's the Great Pancake, Cleveland Brown
- It's the Great Pumpkin, Charlie Brown
- Italian Aerospace Research Centre
- Italian Amateur Astronomers Union
- Italian Space Agency
- Italian names in the solar system
- Itapetinga Radio Observatory
- Itaquascon
- Ithaca Chasma
- Itinerarium exstaticum
- Itinerary file
- Itqiy meteorite
- Ituran
- Iturralde crater
- Ituxi Vallis
- Iunius (month)
- Ius Chasma
- Iusaaset
- Ivan A. Getting
- Ivan Aničin
- Ivan Gough
- Ivan Ivanovich (Vostok programme)
- Ivan Paskvić
- Ivan Roudyk
- Ivan Tyrrell
- Ivan Urgant
- Ivan Visin
- Ivan Yarkovsky
- Ivan's hammer
- IvanAnywhere
- Ivano Bertini
- Ivanpah orogeny
- Ives (crater)
- Ives–Stilwell experiment
- Ivor Robinson (physicist)
- Ivy Hooks
- Iván Almár
- Iwahashi Zenbei
- Izakaya
- Izanagi
- Izlel ye Delyo Haydutin
- Izold Pustõlnik
- Izquierdo (crater)
- Izsak (crater)
- Izumo (train)
- J Bole Toh Jadoo
- J Centauri
- J Puppis
- J band (infrared)
- J-I
- J-PAS
- J-Wear
- J-aggregate
- J-type asteroid
- J. A. Hadfield
- J. A. Lawrence
- J. Allen Hynek
- J. Allen St. John
- J. C. Coleman
- J. D. Bernal
- J. D.'s Revenge
- J. Davy Kirkpatrick
- J. E. Talbot
- J. F. S. Stone
- J. Francis McComas
- J. G. Ballard
- J. G. Farrell
- J. Grant Thiessen
- J. Halcombe Laning
- J. Herschel (crater)
- J. J. Abrams
- J. J. Benítez
- J. Keith Fraser
- J. Lamar Worzel
- J. Lawrence Smith Medal
- J. Marvin Herndon
- J. O. Bailey
- J. Pauly & Sohn
- J. Posadas
- J. R. Ackerley
- J. Richard Fisher
- J. Richard Gott
- J. Robert Oppenheimer
- J. Thomas Dickinson
- J. Tuzo Wilson Medal
- J. Val Klump
- J. Vernon Shea
- J. Ward Moody
- J. Wayne Littles
- J.G. Melon
- J.M. Frey
- J002E3
- J0815+4729
- J1000+0221
- J1124+4535
- J1719-143
- JAWSAT
- JAXA
- JAXA Astronaut Corps
- JB's Dudley
- JCPM Yakiimo Station
- JCSAT-1
- JCSAT-11
- JCSAT-15
- JCSAT-16
- JCSAT-17
- JCSAT-1B
- JCSAT-2
- JCSAT-2A
- JCSAT-2B
- JCSAT-3
- JCSAT-3A
- JCSAT-4A
- JCSAT-4B
- JCSAT-5A
- JCSAT-RA
- JEDI
- JEM-EUSO
- JERS-1
- JJ Eldridge
- JJ Villard's Fairy Tales
- JKCS 041
- JP Aerospace
- JP11
- JPL Horizons On-Line Ephemeris System
- JPL Science Division
- JPL Small-Body Database
- JPSS-2
- JSAT (satellite constellation)
- JSAT Corporation
- JSC Kuznetsov
- JSC Moon Base
- JUICE (software)
- JULES
- JUNQ and IPOD
- JY1-SAT
- Ja slit-faced bat
- Jaan Einasto
- Jabberwocky
- Jabel Waqf as Suwwan crater
- Jabir ibn Aflah
- Jabir ibn Hayyan
- Jablonski diagram
- Jacchia Reference Atmosphere
- Jack Arnold (director)
- Jack B. Newton
- Jack Bros.
- Jack Clemons
- Jack Coggins
- Jack Cohen (biologist)
- Jack D. Elliot
- Jack D. Fischer
- Jack Dangermond
- Jack Dann
- Jack Flash
- Jack Frost (1997 film)
- Jack G. Hills
- Jack Garman
- Jack Gaughan
- Jack Green (geologist)
- Jack Horkheimer
- Jack J. Lissauer
- Jack James (rocket engineer)
- Jack King (NASA)
- Jack Kinzler
- Jack Kirby
- Jack L. Chalker
- Jack Layton
- Jack Lousma
- Jack Meadows (astronomer)
- Jack O'Neill
- Jack Paar
- Jack Parsons (rocket engineer)
- Jack Pepper
- Jack Reacher: Never Go Back
- Jack Rollins (producer)
- Jack Ruby
- Jack Sound
- Jack Speer
- Jack Straw's Castle, Hampstead
- Jack Swigert
- Jack Williamson
- Jack Wisdom
- Jack and the Beanstalk (1952 film)
- Jack-o'-lantern
- Jackie Brown
- Jackson (crater)
- Jackson School of Geosciences
- Jackson-Gwilt Medal
- Jacob Bekenstein
- Jacob Cohen (scientist)
- Jacob Heinrich Wilhelm Lehmann
- Jacob Le Maire
- Jacob Lund Fisker
- Jacob Matijevic
- Jacob Milich
- Jacob Noel-Storr
- Jacob Salatun
- Jacob Weisman
- Jacob ben David ben Yom Tov
- Jacob ben Isaac Corsono
- Jacob ben Machir ibn Tibbon
- Jacob's Ladder
- Jacob's staff
- Jacoba Hol
- Jacobi (crater)
- Jacobi coordinates
- Jacobi ellipsoid
- Jacobi integral
- Jacobus Kapteyn
- Jacobus Kapteyn Telescope
- Jacopo Dondi dell'Orologio
- Jacqueline Hewitt
- Jacqueline Lichtenberg
- Jacqueline Mitton
- Jacqueline van Gorkom
- Jacques Beckers
- Jacques Bergier
- Jacques Blamont
- Jacques Vallée
- Jacques l'Hermite
- Jadav Payeng
- Jaffe profile
- Jagannatha Samrat
- Jaghmini
- Jaguar (American rocket)
- Jaguar (British rocket)
- Jaguar (supercomputer)
- Jaime Maussan
- Jaimini Sutras
- Jak 3
- Jak II
- Jak X: Combat Racing
- Jak and Daxter
- Jak and Daxter Collection
- Jak and Daxter: The Lost Frontier
- Jak and Daxter: The Precursor Legacy
- Jakarta Planetarium and Observatory
- Jake Garn
- Jake Matijevic (rock)
- Jake2
- Jakku
- Jakob Bartsch
- Jakob Benjamin Fischer
- Jakob Christmann
- Jakob Karl Ernst Halm
- Jakob Sederholm
- Jakub Kresa
- Jalal al-Din Yazdi
- Jalkr
- Jamaica ginger
- Jamaican Maroon Creole
- Jamaican owl
- Jamal ad-Din Bukhari
- James A. Dallas
- James A. Isenberg
- James A. Michener
- James A. Pawelczyk
- James Ayscough
- James B. Garvin
- James B. Kaler
- James B. Pollack
- James Bauer (astronomer)
- James Benson
- James Binney
- James Blish
- James Booth (mathematician)
- James Bradley
- James Breen (astronomer)
- James Buchli
- James Burke (space engineer)
- James C. Adamson
- James Cameron
- James Cameron's Avatar: The Game
- James Carpenter (astronomer)
- James Challis
- James Chappell
- James Clark Ross
- James Clerk Maxwell Telescope
- James Colnett
- James Cook
- James Cook Observatory
- James Corden
- James Craig Watson
- James Craig Watson Medal
- James Creek
- James Cuffey
- James Curley (astronomer)
- James D. Halsell
- James D. Hays
- James Davis (musician)
- James Donald
- James Doohan
- James Dunlop
- James Dunlop (astronomer)
- James Dutton (astronaut)
- James E. Faller
- James E. Gunn (writer)
- James E. McDonald
- James Edward Keeler
- James F. Bell, III
- James F. Drake
- James F. McGrath
- James F. Reilly
- James Fellowes (cricketer)
- James Ferguson (American astronomer)
- James Ferguson (Scottish astronomer)
- James Franck
- James Frenkel
- James G. Blaine Society
- James Gilbert Baker
- James Gregory Telescope
- James Gunn (astronomer)
- James H. Fetzer
- James H. Newman
- James Hamilton (physicist)
- James Hansen
- James Harder
- James Hartness
- James Irwin
- James Jeans
- James K. Morrow
- James Kasting
- James Ketchell
- James L. Elliot
- James L. Green
- James L. Hilton
- James L. Kinsey
- James L. Quinn (editor)
- James Lavelle
- James Lick
- James Lick telescope
- James Lowder
- James M. Bardeen
- James M. Kelly (astronaut)
- James Magee (sea captain)
- James Maxime DuPont
- James May at the Edge of Space
- James May on the Moon
- James McDivitt
- James McKerrow
- James McMahon (astronomer)
- James Melville Gilliss
- James Michael Moran
- James Muirden
- James Nicoll
- James Oberg
- James Octavius Machell
- James P. Bagian
- James Pond 3
- James R. Arnold
- James R. Houck
- James R. Kass
- James Raymond Lawson
- James Robinson (filk musician)
- James Russell III
- James S. Voss
- James Short (mathematician)
- James Simms (instrument maker)
- James Slattin Martin Jr.
- James South
- James Spilker
- James St. James
- James Stone (physicist)
- James Taranik
- James Trotter (British Army officer)
- James Turner (illustrator)
- James V. Scotti
- James W. Brault
- James W. Christy
- James W. Head
- James W. Moseley
- James W. Wood
- James W. York
- James Warhola
- James Webb Space Telescope
- James Westphal
- James Wharram
- James Whitcomb Riley (train)
- James White (author)
- James Whitney Young
- James William Colbert Jr.
- James William Grant (astronomer)
- James Wilson (Archdeacon of Manchester)
- James Wu
- James Yenbamroong
- James Zabiela
- James van Hoften
- Jamestown: Legend of the Lost Colony
- Jami Deadly
- Jamie Farnes
- Jamie Jones (DJ)
- Jamie Masada
- Jamie Zawinski
- Jamileh (dancer)
- Jamin interferometer
- Jamshedji Sorab Kukadaru
- Jamshīd al-Kāshī
- Jan Borgman
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- Janssen Medal (French Academy of Sciences)
- Janssen revolver
- Jantar Mantar
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- January 1938 geomagnetic storm
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- Japan Agency for Marine-Earth Science and Technology
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- Javier Martín-Torres
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- Jedi Apprentice: Deceptions
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- Jellyfish galaxy
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- Joe (1970 film)
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- Johannesburg Planetarium
- John "Julius" Knight
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- John A. Eddy
- John A. O'Keefe (astronomer)
- John A. Peacock
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- John B. Alexander
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- John Baker, Baron Baker
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- John Byron
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- John Casper
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- John Charles Priscu
- John Clipperton
- John Clute
- John Conduitt
- John Conway (astronomer)
- John Couch Adams
- John Creamer & Stephane K
- John Cuff (optician)
- John D. Barrow
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- John D. Kraus
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- John Dowie's Tavern
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- John Forte
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- John Glenn
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- John Gore (Royal Navy officer, died 1790)
- John Grant (author)
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- John Guest (geologist)
- John Gummere
- John H. Chapman Space Centre
- John H. DeWitt Jr.
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- John Huchra
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- John J. Kavelaars
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- John Le Rougetel
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- John Monroe Van Vleck
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- John Mudge
- John Mulchaey
- John Mulholland (magician)
- John N. Bahcall
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- John Oliver
- John Oliver Creighton
- John P. Healey
- John Payson Williston Observatory
- John Peckham
- John Pediasimos
- John Petrucci
- John Philoponus
- John Picacio
- John Platt (computer scientist)
- John Prestage
- John Quincy Stewart
- John R. Casani
- John Rand Capron
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- John Robertson (New Zealand politician, born 1875)
- John Robinson Airey
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- John Russell Hind
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- John Shipley Rowlinson
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- John Stanley Plaskett
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- John Theophilus Boileau
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- John V. Evans (astronomer)
- John V. McClusky
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- John Wesley Powell Award
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- John of Damascus
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- John of Worcester
- John's vision of the Son of Man
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- Johnson Matthey Technology Review
- Johnson Space Center
- Johnsonville crater
- Joi Lansing
- Joint (geology)
- Joint Astronomy Centre
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- Joliot (crater)
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- Jolly Coopers, Hampton
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- Joule (crater)
- Joule–Thomson effect
- Journal for the History of Astronomy
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- Journal of Applied Remote Sensing
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- Journal of Raman Spectroscopy
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- Journey Through the Impossible
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- Jovan Cvijić
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- Jovian Chronicles
- Jovian Europa Orbiter
- Jovian Infrared Auroral Mapper
- Jovian–Plutonian gravitational effect
- Jovilabe
- Jovis Tholus
- Joy (crater)
- Joy Crisp
- Joy Theater
- Joy Tivy
- Joy of Sex (film)
- Joy's Law (astronomy)
- Joycelyn Harrison
- João Faras
- João Magueijo
- João da Gama
- Juan Carlos Castilla Zenobi
- Juan Cole
- Juan Fernández Ridge
- Juan G. Sanguin
- Juan Manuel Cajigal y Odoardo
- Juan R. Cruz
- Juan Sebastián Elcano
- Juan de Zubileta
- Juanita Coulson
- Jubb Yussef (Joseph's Well)
- Judah Ha-Levi (crater)
- Judah ben Solomon ha-Kohen
- Judah ibn Verga
- Judas's belt
- Judge Jules
- Judgment Day (1999 film)
- Judi-Dart
- Judica-Cordiglia brothers
- Judicial astrology
- Judith Curry
- Judith Gamora Cohen
- Judith Kersey
- Judith Lapierre
- Judith Lean
- Judith Merril
- Judith Pipher
- Judith Racusin
- Judith Resnik
- Judith S. Olson
- Judoon
- Judson B. Coit
- Judson B. Coit Observatory
- Judy Sullivan
- Judy-Lynn del Rey
- Jug Face
- Jugband Blues
- Jugnu (satellite)
- Jule G. Charney Award
- Jules Alfred Pierrot Deseilligny
- Jules Verne (crater)
- Jules Verne ATV
- Jules Verne's Rocket to the Moon
- Julia (1974 film)
- Julia Dream
- Julia Marcus
- Julia Riley
- Julian Chela-Flores
- Julian Earls
- Julian Scheer
- Julian Thomas
- Julian Thornton-Duesbery
- Julian calendar
- Julian day
- Julian year (astronomy)
- Julie Dillon
- Julie Lutz
- Julie McEnery
- Julie Palais
- Julie Payette
- Julie Vinter Hansen
- Julienne (crater)
- Julienne Stroeve
- Juliet (moon)
- Julieta Norma Fierro Gossman
- Julio Navarro (astrophysicist)
- Julius August Christoph Zech
- Julius Bauschinger
- Julius Caesar (crater)
- Julius Erasmus Hilgard
- Julius Heinrich Franz
- Julius Montgomery
- Julius Obsequens
- Julius Reichelt
- Julius Scheiner
- Julius Schiller
- Julius Schwartz
- Julnar (crater)
- Jump (Alliance–Union universe)
- JumpStart Adventures 3rd Grade: Mystery Mountain
- Jumper (2008 film)
- Jumpgate Evolution
- Jumpgate: The Reconstruction Initiative
- Jumpin' Jupiter
- Jumping-Jupiter scenario
- Jumpseat (satellite)
- Jun Chen (astronomer)
- Juna Kollmeier
- Juncus subnodulosus–Cirsium palustre fen-meadow
- June Bootids
- June solstice
- Jungfrau Park
- Jungle Warriors
- Junior Jack
- Junior Vasquez
- Junk Bond Observatory
- Juno (spacecraft)
- Juno I
- Juno Radiation Vault
- Juno V
- Juno clump
- JunoCam
- Jupiter
- Jupiter (mythology)
- Jupiter (spacecraft)
- Jupiter Ascending
- Jupiter Dolichenus
- Jupiter Europa Orbiter
- Jupiter Five
- Jupiter Ganymede Orbiter
- Jupiter Icy Moons Explorer
- Jupiter Icy Moons Orbiter
- Jupiter LI
- Jupiter LII
- Jupiter LIV
- Jupiter LIX
- Jupiter LV
- Jupiter LVI
- Jupiter LXI
- Jupiter LXIII
- Jupiter LXIV
- Jupiter LXIX
- Jupiter LXVI
- Jupiter LXVII
- Jupiter LXVIII
- Jupiter LXX
- Jupiter LXXII
- Jupiter Lander
- Jupiter Magnetospheric Orbiter
- Jupiter Mission 1999
- Jupiter Moon
- Jupiter barrier
- Jupiter in fiction
- Jupiter mass
- Jupiter radius
- Jupiter trojan
- Jupiter's moons in fiction
- Jupiter-C
- Jura Mountains
- Jura Observatory
- Jura-Sternwarte Grenchen
- Juraj Tóth
- Jurassic Museum of Asturias
- Jurgen Ziewe
- Jurgen, A Comedy of Justice
- Jurij Kasjan
- Jurin's law
- Juris Zarins
- Just Before Dawn (1981 film)
- Just Imagine
- Just for the Hell of It
- Justice (Red Dwarf)
- Justice (band)
- Justice League Dark: Apokolips War
- Justice League: Alien Invasion 3D
- Justice League: The New Frontier
- Justin (robot)
- Justin B. Ries
- Justin Berkmann
- Justine Larbalestier
- Justine Shaw
- Justus Georg Westphal
- Juventae Chasma
- Juxtlahuaca
- Jwibulnori
- Jyeshtha (month)
- Jyeshtha (nakshatra)
- Jyotiranjan Srichandan Ray
- Jyotirmimamsa
- Jyotirvidya Parisanstha
- Jyotisha
- Jyotiḥśāstra
- Jyrki Kasvi
- Jyā, koti-jyā and utkrama-jyā
- Jämtlands Flyg
- Jérôme Eugène Coggia
- Jñānarāja
- Jókai (crater)
- Jón Eyþórsson
- Jökulhlaup
- Jökull
- Jörg Colberg
- Jörundur Svavarsson
- Jørgen Christensen-Dalsgaard
- Jügderdemidiin Gürragchaa
- Jürgen Ehlers
- Jürgen Meyer-ter-Vehn
- Jürgen Schmitt (physicist)
- K 1-2
- K Carinae
- K Centauri
- K Missile family
- K Puppis
- K Velorum
- K band (infrared)
- K correction
- K-10 robot
- K-15 Krajina Missile
- K-PAX
- K-Swift
- K-Swing
- K-U ratio
- K-band multi-object spectrograph
- K-complex
- K-distribution
- K-edge
- K-line (x-ray)
- K-theory (physics)
- K-type asteroid
- K-type main-sequence star
- K. H. Scheer
- K. Kunaratnam
- K. Megan McArthur
- K. R. Ramanathan
- K. S. Krishnan
- K. Tempest Bradford
- K. V. Sarma
- K2-138
- K2-138b
- K2-141b
- K2-146b
- K2-148b
- K2-155d
- K2-18
- K2-187
- K2-18b
- K2-19
- K2-21b
- K2-21c
- K2-229
- K2-229b
- K2-22b
- K2-239
- K2-24
- K2-24b
- K2-24c
- K2-28
- K2-288Bb
- K2-3
- K2-315
- K2-315b
- K2-32
- K2-33
- K2-33b
- K2-38b
- K2-3b
- K2-3c
- K2-3d
- K2-58
- K2-72
- K2-72b
- K2-72c
- K2-72d
- K2-72e
- K2K experiment
- K3 surface
- KA-SAT
- KAGRA
- KAIRA
- KAIST Satellite Technology Research Center
- KARI KSR-1
- KARI KSR-3
- KARMEN
- KARST
- KASCADE
- KAT-7
- KATRIN
- KAUR (satellite bus)
- KBC Void
- KC Space Pirates
- KELT-10
- KELT-11b
- KELT-18b
- KELT-21b
- KELT-2A
- KELT-2Ab
- KELT-4Ab
- KELT-9b
- KEO
- KH 15D
- KH-11 Kennen
- KH-8 Gambit 3
- KH-9 Hexagon
- KIC 11026764
- KIC 9832227
- KICU-TV
- KINT-IRGT
- KK Andromedae
- KKR 03
- KKR 25
- KKh 060
- KKs 3
- KM3NeT
- KMS Fusion
- KOI-2124.01
- KOI-256
- KOI-4878.01
- KOI-74
- KOI-7617.01
- KOI-7923.01
- KOI-81
- KOMDIV-32
- KOMPSAT
- KOSMA
- KOSMICA
- KPD 1930+2752
- KQ Puppis
- KREEP
- KSAT-2
- KSEG : Korean Society of Earth and Exploration Geophysicists
- KSR-2 (sounding rocket)
- KStars
- KSw 71
- KT Eridani
- KT Lupi
- KTDU-35
- KU Hydrae
- KU Observatory
- KVTK (rocket stage)
- KW Sagittarii
- KW – Das Heizkraftwerk
- KX Andromedae
- KXTV
- KY Cygni
- KZ Andromedae
- Ka-Ata-Killa
- Kaali crater
- Kaare Aksnes
- Kabaret OT.TO
- Kabaret Olgi Lipińskiej
- Kabaret Starszych Panów
- Kabaret TEY
- Kabaret Wagabunda
- Kabarett
- Kaboom (film)
- Kachina Chasmata
- Kacific Broadband Satellites
- Kaena: The Prophecy
- Kaesong Chomsongdae
- Kaethe Katrin Wenzel
- Kaffeklubben Island
- Kagome crest
- Kahala yoga
- Kahausibware
- Kai Siegbahn
- Kai Tracid
- KaiA
- KaiB
- KaiC
- Kaidun meteorite
- Kaigas
- Kaikilani
- Kaikō ROV
- Kailasanathar Temple, Thingalur
- Kainsaz meteorite
- Kaiser (Martian crater)
- Kaiser (lunar crater)
- Kaizoku Sentai Gokaiger
- Kaj Aage Gunnar Strand
- Kaja Foglio
- Kakuda Space Center
- Kalai Arasi
- Kalam SAT
- Kalamazoo Valley Museum
- Kalamos Island biological field station
- Kalanchoe
- Kalb–Ramond field
- Kale (moon)
- Kaleideum
- Kalkaska sand
- Kalki Bhagawan
- Kalkkop crater
- Kallichore (moon)
- Kalpana Chawla
- Kalpana-1
- Kalpavriksh
- Kalpin (crater)
- Kaltes-Ekwa
- Kaluga crater
- Kaluli creation myth
- Kalunga line
- Kaluza–Klein theory
- Kalwi & Remi
- Kalyke
- Kalypso (software)
- Kamacite
- Kamal Al-Yahya
- Kamchatka meteor
- Kame
- Kame delta
- Kamen Rider Fourze
- Kamen Rider Kabuto
- Kamensk crater
- Kamerlingh Onnes (crater)
- Kamil Hornoch
- Kamioka Liquid Scintillator Antineutrino Detector
- Kamioka Observatory
- Kamiumi
- Kamiyonanayo
- Kanan Jarrus
- Kanchan Pande
- Kandilli Observatory
- Kandinsky (crater)
- Kandy Fong
- Kane (crater)
- Kane Ian
- Kanehekili Fluctus
- Kang Dong-suk
- Kanjar Ro
- Kankoh-maru
- Kansas City Museum
- Kansas City Zephyr
- Kansas City–Florida Special
- Kant (crater)
- Kantha
- Kantowski–Sachs metric
- Kanyā
- Kanzelhoehe Solar Observatory
- Kao (crater)
- Kao Ping-tse
- Kaohsiung Astronomical Museum
- Kaoru Ikeya
- Kapitsa–Dirac effect
- Kapitza instability
- Kappa (rocket)
- Kappa Andromedae
- Kappa Andromedae b
- Kappa Apodis
- Kappa Aquarii
- Kappa Aquilae
- Kappa Arae
- Kappa Arietis
- Kappa Aurigae
- Kappa Boötis
- Kappa Cancri
- Kappa Canis Majoris
- Kappa Capricorni
- Kappa Cassiopeiae
- Kappa Centauri
- Kappa Cephei
- Kappa Ceti
- Kappa Chamaeleontis
- Kappa Columbae
- Kappa Coronae Australis
- Kappa Coronae Borealis
- Kappa Coronae Borealis b
- Kappa Crateris
- Kappa Crucis (star)
- Kappa Cygni
- Kappa Cygnids
- Kappa Delphini
- Kappa Draconis
- Kappa Eridani
- Kappa Fornacis
- Kappa Geminorum
- Kappa Gruis
- Kappa Herculis
- Kappa Hydrae
- Kappa Leonis
- Kappa Leporis
- Kappa Librae
- Kappa Lupi
- Kappa Lyrae
- Kappa Normae
- Kappa Ophiuchi
- Kappa Pavonis
- Kappa Pegasi
- Kappa Persei
- Kappa Phoenicis
- Kappa Pictoris
- Kappa Piscium
- Kappa Pyxidis
- Kappa Reticuli
- Kappa Sagittarii
- Kappa Scorpii
- Kappa Sculptoris
- Kappa Serpentis
- Kappa Tauri
- Kappa Telescopii
- Kappa Trianguli Australis
- Kappa Tucanae
- Kappa Ursae Majoris
- Kappa Velorum
- Kappa Virginis
- Kappa Volantis
- Kappa1 Apodis
- Kappa1 Ceti
- Kappa1 Coronae Australis
- Kappa1 Lupi
- Kappa1 Sagittarii
- Kappa1 Sculptoris
- Kappa2 Apodis
- Kappa2 Ceti
- Kappa2 Coronae Australis
- Kappa2 Lupi
- Kappa2 Sagittarii
- Kappa2 Sculptoris
- Kappa–mechanism
- Kapteyn (crater)
- Kapteyn Astronomical Institute
- Kapteyn b
- Kapteyn c
- Kapteyn's Star
- Kapustin Yar
- Kara crater
- Karachi Film Society
- Karakul (Tajikistan)
- Karamoja (film)
- Karanapaddhati
- Kardashev scale
- Karel Absolon
- Karel Anděl
- Karel Bossart
- Karel Slavíček
- Karel Thole
- Karelides
- Karen Akers
- Karen Haber
- Karen Harvey Prize
- Karen Heywood
- Karen Jean Meech
- Karen Masters
- Karen Nyberg
- Karen Von Damm
- Kari (moon)
- Kari Enqvist
- Karikkoselkä
- Karin Bryan
- Karin Lochte
- Karin family
- Karin Öberg
- Karizma (musician)
- Karkaṭa
- Karl Augustesen
- Karl Christian Bruhns
- Karl Farkas
- Karl Friedrich Küstner
- Karl Glazebrook
- Karl Gordon Henize
- Karl Guthe Jansky
- Karl Heinrich von Nassau-Siegen
- Karl Kreil
- Karl L. Littrow
- Karl Ludwig Harding
- Karl Ludwig Hencke
- Karl Müller (astronomer)
- Karl Ramsayer
- Karl Schwarzschild
- Karl Schwarzschild Medal
- Karl Schwarzschild Observatory
- Karl Stetter
- Karl Stumpff
- Karl Valentin
- Karl Weyprecht
- Karl Wilhelm Reinmuth
- Karl Wilhelm Valentiner
- Karl-Heinz Rädler
- Karl-Otto Kiepenheuer
- Karla (film)
- Karla Schmidt
- Karla crater
- Karlie Noon
- Karlis Kaufmanis
- Karlovy lázně
- Karls kühne Gassenschau
- Karma yoga
- Karmasthana (astrology)
- Karmic astrology
- Karol J. Bobko
- Karoo
- Karoo (crater)
- Karoonda meteorite
- Karpinskiy (crater)
- Karrer (crater)
- Karsh (crater)
- Karst
- Karst Underwater Research
- Karst fenster
- Karst lake
- Karst spring
- Karta GPS
- Karthika Deepam
- Kartik (month)
- Kartika I
- Karzok (crater)
- Kasei Valles
- Kashinhou
- Kasimir Graff
- Kasirga rocket system
- Kaskade
- Kasner metric
- Kaspar Gottfried Schweizer
- Kaspar Uttenhofer
- Kastanozem
- Kat (Gravity Rush)
- Kat Gunn
- Katakis
- Katarche
- Katarchic astrology
- Katarmal
- Katchalsky (crater)
- Kate Adamala
- Kate Brooks (astronomer)
- Kate Isaak
- Kate Marvel
- Kate Meyrick
- Kate Simko
- Kate Worley
- Kate, the Cat and the Moon
- Katey Walter Anthony
- Kathaleen Land
- Kathanam
- Katharina Kepler
- Katharine Blodgett Gebbie
- Katharine Giles
- Katharine Reeves
- Katherine Calvin
- Katherine H. Freeman
- Katherine Johnson
- Katherine Johnson Independent Verification and Validation Facility
- Katherine Joy
- Katherine Richardson Christensen
- Katherine Ross (scientist)
- Katherine Weimer
- Kathleen Ann Campbell
- Kathleen Bever Blackburn
- Kathleen Conlan
- Kathleen Fontaine
- Kathleen Miller (scientist)
- Kathleen Ollerenshaw
- Kathleen Rubins
- Kathryn C. Thornton
- Kathryn Cramer
- Kathryn D. Sullivan
- Kathryn P. Hire
- Kathy Griffin
- Kathy Lueders
- Kathy Vivas
- Katian
- Katie Mack (astrophysicist)
- Katie Nolan
- Katrin Linse
- Katsuhiro Otomo
- Kattendijk Sands
- Kattukkaran Varunny Joseph
- Katuru Narayana
- Katzman Automatic Imaging Telescope
- Kauaʻi Educational Association for Science and Astronomy
- Kautsky effect
- Kavasji Naegamvala
- Kaveri Crater
- Kavian
- Kavli Institute for Cosmology
- Kavli Prize
- Kayla Barron
- Kayla Iacovino
- Kayper
- KazCosmos
- KazEOSat 2
- KazSat-1
- KazSat-2
- KazSat-3
- Kazachok
- Kazakh Steppe
- Kazakh space program
- Kazakhstan
- Kazimieras Černis
- Kazimierz Czarnecki (engineer)
- Kazimierz Kordylewski
- Kazimierz Siemienowicz
- Kazuo Kubokawa
- Kazuro Watanabe
- Kazutaka Miyatake
- Kazuyoshi Itō
- Kašku
- Ke Kā o Makaliʻi
- Keanu Reeves
- Kearons (crater)
- Keats (crater)
- Keb Darge
- Kebira Crater
- Keck Geology Consortium
- Keck Institute for Space Studies
- Kedarnath (film)
- Kedr
- Keeble Observatory
- Keeler (Martian crater)
- Keeler (lunar crater)
- Keeling Curve
- Keelut (crater)
- Keely Smith
- Keenen Ivory Wayans
- Keep Talking (Pink Floyd song)
- Keepin' Halloween Alive
- Keetch–Byram drought index
- Kefitzat Haderech
- Keilir
- Keith Barber (geographer)
- Keith Brooke
- Keith Cowing
- Keith Critchlow
- Keith David
- Keith Henson
- Keith Lofstrom
- Keith Mason (scientist)
- Keith Runcorn Prize
- Keith Tritton
- Keith-Albee Theatre
- Keivan Stassun
- Kejimkujik National Park
- Kek (mythology)
- Kekerengu Fault
- Kekulé (crater)
- Keldysh (crater)
- Keldysh Research Center
- Keldysh bomber
- Kelle Cruz
- Kelli Hand
- Kelly Falkner
- Kelly Freas
- Kelly Jemison
- Kelly West crater
- Kelly-Strayhorn Theater
- Kelsi Singer
- Kelu-1
- Kelvin–Helmholtz instability
- Kelvin–Helmholtz mechanism
- Kemadruma yoga
- Kemble's Cascade
- Kemistry
- Kemistry & Storm
- Kemlo
- Kempe Award for Distinguished Ecologists
- Ken Baxter (businessman)
- Ken Bowersox
- Ken Crawford (astrophotographer)
- Ken Croswell
- Ken Freeman (astronomer)
- Ken Ishii
- Ken MacLeod
- Ken Mattingly
- Ken Park
- Ken Pounds
- Ken Slater (science fiction)
- Kenai Group
- Kenji Kamiyama
- Kenji Yamamoto (composer, born 1964)
- Kenkō (crater)
- Kenn Thomas
- Kennedy Space Center
- Kennedy Space Center Launch Complex 39
- Kennedy Space Center Launch Complex 39A
- Kennedy Space Center Launch Complex 39B
- Kennedy Space Center Launch Complex 48
- Kennelly–Heaviside layer
- Kenneth Arnold
- Kenneth Bulmer
- Kenneth Cockrel Jr.
- Kenneth Cockrel Sr.
- Kenneth Cockrell
- Kenneth D. Cameron
- Kenneth Edgeworth
- Kenneth Franklin
- Kenneth G. Libbrecht
- Kenneth G. McCracken
- Kenneth Greisen
- Kenneth Ham
- Kenneth J. Lawrence
- Kenneth John Frost
- Kenneth Kellermann
- Kenneth M. Halanych
- Kenneth N. Beers
- Kenneth Nordtvedt
- Kenneth P. Green
- Kenneth R. Sembach
- Kenneth S. Fagg
- Kenneth S. Kleinknecht
- Kenneth S. Reightler Jr.
- Kennicutt–Schmidt law
- Kennon Observatory
- Kenny "Dope" Gonzalez
- Kenny & Company
- Kenny Hawkes
- Kent Brewster
- Kent Cullers
- Kent Ford (astronomer)
- Kent Hotel
- Kent Rominger
- Kentland crater
- Kentucky Geological Survey
- Kentucky Space Grant Consortium
- Kentucky Theater (Lexington)
- Kenwood Astrophysical Observatory
- Kenwood Corporation
- Kenyte
- Kenzo Suzuki (astronomer)
- Kepler (Martian crater)
- Kepler (lunar crater)
- Kepler College
- Kepler Follow-up Program
- Kepler Input Catalog
- Kepler Museum
- Kepler conjecture
- Kepler de Souza Oliveira
- Kepler object of interest
- Kepler orbit
- Kepler photometer
- Kepler problem
- Kepler space telescope
- Kepler triangle
- Kepler's Supernova
- Kepler's equation
- Kepler's laws of planetary motion
- Kepler-10
- Kepler-102
- Kepler-107
- Kepler-10b
- Kepler-10c
- Kepler-11
- Kepler-11b
- Kepler-11c
- Kepler-11d
- Kepler-11e
- Kepler-11f
- Kepler-11g
- Kepler-12
- Kepler-1229
- Kepler-1229b
- Kepler-124b
- Kepler-12b
- Kepler-13
- Kepler-138
- Kepler-14
- Kepler-14b
- Kepler-15
- Kepler-1520
- Kepler-1520b
- Kepler-1544 b
- Kepler-15b
- Kepler-16
- Kepler-160
- Kepler-1606b
- Kepler-1625
- Kepler-1625b
- Kepler-1625b I
- Kepler-1638b
- Kepler-1647b
- Kepler-1649
- Kepler-1649c
- Kepler-1652b
- Kepler-16b
- Kepler-17
- Kepler-174d
- Kepler-17b
- Kepler-18
- Kepler-182
- Kepler-186
- Kepler-186b
- Kepler-186e
- Kepler-186f
- Kepler-19
- Kepler-19b
- Kepler-19c
- Kepler-20
- Kepler-20b
- Kepler-20c
- Kepler-20d
- Kepler-20e
- Kepler-20f
- Kepler-20g
- Kepler-22
- Kepler-223
- Kepler-22b
- Kepler-23
- Kepler-23b
- Kepler-23c
- Kepler-24
- Kepler-24b
- Kepler-24c
- Kepler-24d
- Kepler-24e
- Kepler-25
- Kepler-25b
- Kepler-25c
- Kepler-26
- Kepler-26e
- Kepler-27
- Kepler-277b
- Kepler-277c
- Kepler-28
- Kepler-283c
- Kepler-28b
- Kepler-29
- Kepler-296
- Kepler-296e
- Kepler-296f
- Kepler-298d
- Kepler-30
- Kepler-31
- Kepler-32
- Kepler-32b
- Kepler-32c
- Kepler-33
- Kepler-33b
- Kepler-34
- Kepler-345b
- Kepler-34b
- Kepler-35
- Kepler-36
- Kepler-36b
- Kepler-37
- Kepler-371
- Kepler-371b
- Kepler-371c
- Kepler-37b
- Kepler-37c
- Kepler-37d
- Kepler-38
- Kepler-39
- Kepler-395c
- Kepler-39b
- Kepler-4
- Kepler-40
- Kepler-40b
- Kepler-41
- Kepler-413b
- Kepler-419
- Kepler-419b
- Kepler-419c
- Kepler-41b
- Kepler-42
- Kepler-421
- Kepler-421b
- Kepler-42c
- Kepler-43
- Kepler-432
- Kepler-432b
- Kepler-438
- Kepler-438b
- Kepler-44
- Kepler-440b
- Kepler-442
- Kepler-442b
- Kepler-443b
- Kepler-444
- Kepler-445b
- Kepler-445c
- Kepler-445d
- Kepler-447b
- Kepler-45
- Kepler-452
- Kepler-452b
- Kepler-453b
- Kepler-46
- Kepler-47
- Kepler-47b
- Kepler-47c
- Kepler-4b
- Kepler-5
- Kepler-51
- Kepler-56
- Kepler-56b
- Kepler-56c
- Kepler-59b
- Kepler-5b
- Kepler-6
- Kepler-60d
- Kepler-61
- Kepler-61b
- Kepler-62
- Kepler-62b
- Kepler-62c
- Kepler-62d
- Kepler-62e
- Kepler-62f
- Kepler-65
- Kepler-66
- Kepler-67
- Kepler-68
- Kepler-68b
- Kepler-68c
- Kepler-68d
- Kepler-69
- Kepler-69b
- Kepler-69c
- Kepler-6b
- Kepler-7
- Kepler-70
- Kepler-70b
- Kepler-70c
- Kepler-71
- Kepler-76b
- Kepler-78
- Kepler-78b
- Kepler-7b
- Kepler-8
- Kepler-80
- Kepler-84
- Kepler-86
- Kepler-87c
- Kepler-88
- Kepler-89
- Kepler-89e
- Kepler-8b
- Kepler-9
- Kepler-90
- Kepler-90e
- Kepler-90f
- Kepler-90h
- Kepler-90i
- Kepler-91b
- Kepler-9b
- Kepler-9c
- Kepler-9d
- Kepler–Poinsot polyhedron
- Kepínski (crater)
- Kerala Soil Museum
- Kerala school of astronomy and mathematics
- Keratophyre
- Keraunography
- Kerb Crawler
- Kerbal Space Program
- Kerbal Space Program 2
- Kerberos (moon)
- Kerim Kerimov
- Kernel-phase
- Kerouac (crater)
- Kerr effect
- Kerr frequency comb
- Kerr metric
- Kerr/CFT correspondence
- Kerri Chandler
- Kerrie Wilson
- Kerry Conran
- Kerry International Dark-Sky Reserve
- Kerr–Newman metric
- Kerr–Schild perturbations
- Kerstin Perez
- Kertész (crater)
- Kerwan (crater)
- Kesen meteorite
- Kesh temple hymn
- Kessler syndrome
- Kesteven 79
- Kether (video game)
- Kettle (landform)
- Kettle logic
- Ketu (mythology)
- Keuper marl
- Keurusselkä
- Kevin A. Ford
- Kevin Aviance
- Kevin Bokeili
- Kevin D. Randle
- Kevin Fong
- Kevin Grazier
- Kevin Hand
- Kevin K. Lehmann
- Kevin L.G. Parkin
- Kevin Long (artist)
- Kevin Luhman
- Kevin P. Chilton
- Kevin R. Kregel
- Kevin Saunderson
- Kevin Schawinski
- Kevin Siembieda
- Kevin Smith
- Kevin Smith (editor)
- Kevola Observatory
- Keweenawite
- Kewpie Chasma
- Keyhole problem
- Keystone (limestone)
- Kgagodi crater
- Khabibullo Abdussamatov
- Khagol Mandal
- Khagol Vishwa
- KhalifaSat
- Khana (poet)
- Khandakhadyaka
- Khansa (crater)
- Kharkiv Observatory
- Khartron
- Khatt Atui
- Khensu (crater)
- Khepri
- Khes
- Kholod
- Khonsu
- Khosr River
- Khunjerab Pass
- Khusrau (crater)
- Khvol'son (crater)
- Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī
- Kibal'chich (crater)
- Kibble–Zurek mechanism
- Kibō (ISS module)
- KickSat
- Kid Crème
- Kid Krrish
- Kid vs. Kat
- Kidili
- Kidinnu (crater)
- Kids (film)
- Kielder Forest Star Camp
- Kielder Observatory
- Kiepenheuer Institute for Solar Physics
- Kies (crater)
- Kieselkalk
- Kiess (crater)
- Kiichirō Furukawa
- Kika Silva Pla Planetarium
- Kikuchi lines (physics)
- Kileken
- Kill (body of water)
- Kill the Moon
- Kill vehicle
- Killarney Provincial Park Observatory
- Killer Camp
- Killer Is Dead
- Killer Kane
- Killer Klowns from Outer Space
- Killer Nun
- Killer's Moon
- Killing Ground (novel)
- Killing horizon
- Killing spinor
- Killjoy (2000 film)
- Killjoy 3
- Killjoy Goes to Hell
- Killjoys
- Killzone
- Killzone (video game)
- Killzone 2
- Killzone 3
- Killzone Shadow Fall
- Killzone: Liberation
- Killzone: Mercenary
- Kilodegree Extremely Little Telescope
- Kilometre per square kilometre
- Kilonova
- Kilopower
- Kim 2
- Kim Am
- Kim Aviance
- Kim Crosbie
- Kim Dam
- Kim Mohan
- Kim Ung-yong
- Kim Venn
- Kim Weaver
- Kimbal Musk
- Kimberley (Western Australia)
- Kimberly A. Novick
- Kimberly Arcand
- Kimberly Hart
- Kimberly Prather
- Kimbolton Fireworks
- Kimmo Innanen
- Kimura (crater)
- Kin Endate
- Kinau (crater)
- Kindling (sedative–hypnotic withdrawal)
- Kinect Star Wars
- Kineococcus radiotolerans
- Kinepolis
- KinetX
- Kinetic PreProcessor
- Kinetic Void
- Kinetic bombardment
- Kinetic inductance detector
- Kinetic theory of gases
- Kinetix
- King (crater)
- King Arthur's messianic return
- King Cole Bar
- King David's Spaceship
- King Dedede
- King Dinosaur
- King Edward VII, Stratford
- King Grayskull
- King Hiss
- King Matjaž
- King Randor
- King Star King
- King asleep in mountain
- King tide
- King's Arms, Waterloo
- King's Bastion
- King's Head, Bexley
- King's Head, Roehampton
- King's Head, Tooting
- King's Observatory
- Kingdom Come (comics)
- Kingdom Hearts 358/2 Days
- Kingdom Hearts 3D: Dream Drop Distance
- Kingman Museum
- Kingmere
- Kings Arms, Hanwell
- Kings Arms, Leaves Green
- Kings Hotel, Sydney CBD
- Kings Theatre (Brooklyn)
- Kings Watch
- Kings of Rhythm
- Kings of Speed
- Kingseat Hospital (New Zealand)
- Kingsley Amis
- Kinich Ahau
- Kinji Fukasaku
- Kink instability
- Kinkora (crater)
- Kinnordy House
- Kino (movement)
- Kintu
- Kinvig
- Kip Thorne
- Kipini (crater)
- Kipling (crater)
- Kirby (character)
- Kirby (crater)
- Kirby (series)
- Kirby 64: The Crystal Shards
- Kirby Air Ride
- Kirby Battle Royale
- Kirby Fighters 2
- Kirby McCauley
- Kirby Star Allies
- Kirby Super Star
- Kirby Tilt 'n' Tumble
- Kirby's Avalanche
- Kirby's Block Ball
- Kirby's Dream Collection
- Kirby's Dream Course
- Kirby's Dream Land 3
- Kirby's Pinball Land
- Kirby's Star Stacker
- Kirby: Right Back at Ya!
- Kirch (crater)
- Kircher (crater)
- Kirchhoff (crater)
- Kirchhoff integral theorem
- Kirchhoff's diffraction formula
- Kirill Florensky
- Kirk (crater)
- Kirk Bryan Award
- Kirkdale Cave
- Kirkdale sundial
- Kirklington Hall Research Station
- Kirkwood (crater)
- Kirkwood Observatory
- Kirkwood gap
- Kirlian photography
- Kirobo
- Kirsan Ilyumzhinov
- Kirsteen Tinto
- Kirsten Banks
- Kirsten Kraiberg Knudsen
- Kirsty McCabe
- Kiruna Station
- Kiso Observatory
- Kiss & Tell (Angels & Airwaves song)
- Kiss György Observatory
- Kiss nightclub fire
- Kistler K-1
- KitKatClub
- Kitab al-Anwa'
- Kitaguni
- Kitakami Michinoku Traditional Dance Festival
- Kitami Observatory
- Kite experiment
- Kitsat-1
- Kitsat-2
- Kitsat-3
- Kitt Peak National Observatory
- Kitti's hog-nosed bat
- Kittu (crater)
- Kitty Burke
- Kitty Kornered
- Kitty O'Brien Joyner
- Kiviuq (moon)
- Kivu Lacus
- KiwiSAT
- KjPn 8
- Kjell N. Lindgren
- Kjellberg Finsterwalde
- Klaatu barada nikto
- Klaproth (crater)
- Klaus Keil
- Klaus Oeggl
- Klaus Riedel
- Klaus von Storch
- Klaus-Dietrich Flade
- Klavdiâ Barkhatova
- Klein (crater)
- Kleine–Levin syndrome
- Kleinmann–Low Nebula
- Klemperer rosette
- Kleo the Misfit Unicorn
- Klevtsov–Cassegrain telescope
- Kleymenov (crater)
- Kleť Observatory
- Klim Churyumov
- Klimisch score
- Klingon Language Institute
- Klingon for the Galactic Traveler
- Klingon grammar
- Klingon language
- Klingon scripts
- Klingon starships
- Kliper
- Klippe
- Klonoa: Door to Phantomile
- Klumpke-Roberts Award
- Klute (crater)
- Klydonograph
- Knave of Clubs
- Knickpoint
- Knight shift
- Knights of Cydonia
- Knights of Ålleberg
- Knitting Factory
- Knivskjellodden
- Knobel (crater)
- Knocking on Heaven's Door (book)
- Knott's Bear-y Tales
- Knott's Scary Farm
- Knowhere
- Knowing (film)
- Known Space
- Knox-Shaw (crater)
- Knud Jessen
- Knudsen gas
- Knut Fægri
- Knut Jørgen Røed Ødegaard
- Knut Lundmark
- Kobayashi Maru
- Kobie Boykins
- Kobra Khan (character)
- Koch (crater)
- Kocher (crater)
- Kodaikanal Solar Observatory
- Kodiak–Bowie Seamount chain
- Koelbjerg Man
- Koenigsberg Observatory
- Koepcke's screech owl
- Koffiefontein mine
- Koga (crater)
- Kohlschütter (crater)
- Koi Pond (The Office)
- Koi... Mil Gaya
- Koiak
- Koichi Wakata
- Koitere Lacus
- Kokey (film)
- Kokino
- Kokopelli
- Kola Alkaline Province
- Kola Superdeep Borehole
- Kolhörster (crater)
- Kolk (vortex)
- Kolob
- Kolya (crater)
- Kom(m)ödchen
- Komabayashi-Ingersoll limit
- Komar mass
- Komar superpotential
- Komarov (crater)
- Komatiite
- Kombucha
- Kommil Foo
- Kompass Klub
- Kompozit
- Konark Sun Temple
- Kondratyuk (crater)
- Kongsberg Maritime
- Kongsberg Satellite Services
- Kongsberg Spacetec
- Kongsfjord Telemetry Station
- Konishi anomaly
- Konkoly Observatory
- Konoplev (crater)
- Konrad Dannenberg
- Konrad Johannes Karl Büttner
- Konrad Rudnicki
- Konstantin Batygin
- Konstantin Feoktistov
- Konstantin Kozeyev
- Konstantin Makarevich
- Konstantin Tsiolkovsky
- Konstantin Valkov
- Konstantinov (crater)
- Konstanty Zakrzewski
- Koo Jun-yup
- Koog
- Kookaburra (rocket)
- Koonibba Test Range
- Kopernik Observatory & Science Center
- Kopff (crater)
- Koposov I
- Koposov II
- Korabl-Sputnik 1
- Korabl-Sputnik 2
- Korabl-Sputnik 3
- Korabl-Sputnik 4
- Korabl-Sputnik 5
- Korado Korlević
- Kordylewski cloud
- Kore (moon)
- Korea Advanced Institute of Science and Technology Satellite 4
- Korea Aerospace Research Institute
- Korea Astronomy and Space Science Institute
- Korea Invisible Mass Search
- Korea Pathfinder Lunar Orbiter
- Korean Astronaut Program
- Korean Astronomical Society
- Korean Committee of Space Technology
- Korean VLBI Network
- Korean creation narratives
- Koreasat
- Koreasat 1
- Koreasat 5
- Koreasat 5A
- Koreasat 6
- Koreasat 7
- Korn's Groovy Pirate Ghost Mystery
- Korolev (Martian crater)
- Korolev (lunar crater)
- Koronas-Foton
- Koronis Rift
- Koronis family
- Korra
- Koruza (technology)
- Kos (unit)
- Kosberg (crater)
- Koshoba (crater)
- Kosmopoisk
- Kosmos (rocket family)
- Kosmos (satellite)
- Kosmos 1
- Kosmos 10
- Kosmos 1001
- Kosmos 101
- Kosmos 1024
- Kosmos 1030
- Kosmos 104
- Kosmos 105
- Kosmos 106
- Kosmos 107
- Kosmos 1074
- Kosmos 108
- Kosmos 11
- Kosmos 110
- Kosmos 1109
- Kosmos 111
- Kosmos 112
- Kosmos 1124
- Kosmos 1129
- Kosmos 115
- Kosmos 116
- Kosmos 1164
- Kosmos 117
- Kosmos 1171
- Kosmos 1172
- Kosmos 1188
- Kosmos 119
- Kosmos 1191
- Kosmos 12
- Kosmos 120
- Kosmos 1217
- Kosmos 122
- Kosmos 1223
- Kosmos 123
- Kosmos 124
- Kosmos 1241
- Kosmos 1247
- Kosmos 1261
- Kosmos 1267
- Kosmos 1278
- Kosmos 1285
- Kosmos 129
- Kosmos 13
- Kosmos 1300
- Kosmos 1317
- Kosmos 132
- Kosmos 133
- Kosmos 1341
- Kosmos 1348
- Kosmos 135
- Kosmos 136
- Kosmos 1367
- Kosmos 137
- Kosmos 1375
- Kosmos 1379
- Kosmos 138
- Kosmos 1382
- Kosmos 14
- Kosmos 140
- Kosmos 1402
- Kosmos 1409
- Kosmos 142
- Kosmos 143
- Kosmos 144
- Kosmos 145
- Kosmos 1456
- Kosmos 146
- Kosmos 147
- Kosmos 148
- Kosmos 1481
- Kosmos 1484
- Kosmos 149
- Kosmos 15
- Kosmos 1514
- Kosmos 1518
- Kosmos 152
- Kosmos 154
- Kosmos 1541
- Kosmos 1546
- Kosmos 1547
- Kosmos 1569
- Kosmos 1581
- Kosmos 1586
- Kosmos 1596
- Kosmos 16
- Kosmos 1604
- Kosmos 1629
- Kosmos 163
- Kosmos 165
- Kosmos 1658
- Kosmos 166
- Kosmos 1661
- Kosmos 1667
- Kosmos 1669
- Kosmos 167
- Kosmos 1675
- Kosmos 1684
- Kosmos 1686
- Kosmos 1687
- Kosmos 1698
- Kosmos 17
- Kosmos 1701
- Kosmos 1729
- Kosmos 173
- Kosmos 176
- Kosmos 1761
- Kosmos 1774
- Kosmos 1783
- Kosmos 1785
- Kosmos 1792
- Kosmos 1793
- Kosmos 18
- Kosmos 1805
- Kosmos 1806
- Kosmos 1818
- Kosmos 1849
- Kosmos 1851
- Kosmos 186 and Kosmos 188
- Kosmos 1867
- Kosmos 1887
- Kosmos 1894
- Kosmos 19
- Kosmos 1903
- Kosmos 191
- Kosmos 1922
- Kosmos 196
- Kosmos 1966
- Kosmos 197
- Kosmos 1974
- Kosmos 1977
- Kosmos 2
- Kosmos 20
- Kosmos 2001
- Kosmos 202
- Kosmos 204
- Kosmos 2044
- Kosmos 2050
- Kosmos 2063
- Kosmos 2076
- Kosmos 2084
- Kosmos 2087
- Kosmos 2097
- Kosmos 21
- Kosmos 2105
- Kosmos 211
- Kosmos 212
- Kosmos 213
- Kosmos 2133
- Kosmos 214
- Kosmos 215
- Kosmos 2155
- Kosmos 2175
- Kosmos 2176
- Kosmos 219
- Kosmos 2196
- Kosmos 2209
- Kosmos 221
- Kosmos 2217
- Kosmos 222
- Kosmos 2221
- Kosmos 2222
- Kosmos 2224
- Kosmos 2229
- Kosmos 2232
- Kosmos 2241
- Kosmos 225
- Kosmos 2251
- Kosmos 2261
- Kosmos 2282
- Kosmos 2286
- Kosmos 23
- Kosmos 230
- Kosmos 2312
- Kosmos 233
- Kosmos 2340
- Kosmos 2342
- Kosmos 2345
- Kosmos 2350
- Kosmos 2351
- Kosmos 2368
- Kosmos 2379
- Kosmos 238
- Kosmos 2380
- Kosmos 2381
- Kosmos 2382
- Kosmos 2388
- Kosmos 2393
- Kosmos 2394
- Kosmos 2395
- Kosmos 2396
- Kosmos 2397
- Kosmos 24
- Kosmos 2402
- Kosmos 2403
- Kosmos 2404
- Kosmos 2411
- Kosmos 2412
- Kosmos 2413
- Kosmos 2417
- Kosmos 2418
- Kosmos 2419
- Kosmos 242
- Kosmos 2421
- Kosmos 2422
- Kosmos 2424
- Kosmos 2425
- Kosmos 2426
- Kosmos 2430
- Kosmos 2431
- Kosmos 2432
- Kosmos 2433
- Kosmos 2434
- Kosmos 2435
- Kosmos 2436
- Kosmos 2440
- Kosmos 2441
- Kosmos 2442
- Kosmos 2443
- Kosmos 2444
- Kosmos 2445
- Kosmos 2446
- Kosmos 2447
- Kosmos 2448
- Kosmos 2449
- Kosmos 245
- Kosmos 2452
- Kosmos 2456
- Kosmos 2457
- Kosmos 2458
- Kosmos 2459
- Kosmos 2460
- Kosmos 2461
- Kosmos 2464
- Kosmos 2465
- Kosmos 2466
- Kosmos 2467
- Kosmos 2468
- Kosmos 2469
- Kosmos 2470
- Kosmos 2471
- Kosmos 2472
- Kosmos 2473
- Kosmos 2474
- Kosmos 2475
- Kosmos 2476
- Kosmos 2477
- Kosmos 2478
- Kosmos 2479
- Kosmos 2480
- Kosmos 2481
- Kosmos 2482
- Kosmos 2483
- Kosmos 2484
- Kosmos 2485
- Kosmos 2494
- Kosmos 2499
- Kosmos 25
- Kosmos 2500
- Kosmos 2501
- Kosmos 2514
- Kosmos 2516
- Kosmos 2522
- Kosmos 2527
- Kosmos 2529
- Kosmos 257
- Kosmos 259
- Kosmos 26
- Kosmos 261
- Kosmos 262
- Kosmos 265
- Kosmos 268
- Kosmos 27
- Kosmos 275
- Kosmos 277
- Kosmos 28
- Kosmos 283
- Kosmos 285
- Kosmos 29
- Kosmos 291
- Kosmos 295
- Kosmos 3
- Kosmos 300
- Kosmos 303
- Kosmos 305
- Kosmos 307
- Kosmos 308
- Kosmos 31
- Kosmos 311
- Kosmos 314
- Kosmos 319
- Kosmos 32
- Kosmos 320
- Kosmos 321
- Kosmos 324
- Kosmos 327
- Kosmos 33
- Kosmos 334
- Kosmos 335
- Kosmos 347
- Kosmos 348
- Kosmos 35
- Kosmos 351
- Kosmos 356
- Kosmos 357
- Kosmos 36
- Kosmos 362
- Kosmos 369
- Kosmos 37
- Kosmos 378
- Kosmos 379
- Kosmos 380
- Kosmos 381
- Kosmos 382
- Kosmos 388
- Kosmos 391
- Kosmos 393
- Kosmos 394
- Kosmos 396
- Kosmos 398
- Kosmos 4
- Kosmos 400
- Kosmos 408
- Kosmos 419
- Kosmos 421
- Kosmos 423
- Kosmos 426
- Kosmos 434
- Kosmos 435
- Kosmos 440
- Kosmos 453
- Kosmos 455
- Kosmos 458
- Kosmos 459
- Kosmos 46
- Kosmos 461
- Kosmos 467
- Kosmos 47
- Kosmos 472
- Kosmos 48
- Kosmos 481
- Kosmos 482
- Kosmos 485
- Kosmos 487
- Kosmos 49
- Kosmos 496
- Kosmos 497
- Kosmos 498
- Kosmos 5
- Kosmos 50
- Kosmos 501
- Kosmos 51
- Kosmos 52
- Kosmos 520
- Kosmos 521
- Kosmos 523
- Kosmos 524
- Kosmos 526
- Kosmos 53
- Kosmos 545
- Kosmos 553
- Kosmos 557
- Kosmos 558
- Kosmos 562
- Kosmos 57
- Kosmos 573
- Kosmos 580
- Kosmos 6
- Kosmos 60
- Kosmos 601
- Kosmos 605
- Kosmos 606
- Kosmos 608
- Kosmos 611
- Kosmos 613
- Kosmos 615
- Kosmos 633
- Kosmos 634
- Kosmos 638
- Kosmos 64
- Kosmos 656
- Kosmos 66
- Kosmos 662
- Kosmos 665
- Kosmos 668
- Kosmos 670
- Kosmos 672
- Kosmos 68
- Kosmos 686
- Kosmos 690
- Kosmos 695
- Kosmos 7
- Kosmos 70
- Kosmos 703
- Kosmos 705
- Kosmos 706
- Kosmos 725
- Kosmos 745
- Kosmos 750
- Kosmos 76
- Kosmos 772
- Kosmos 775
- Kosmos 78
- Kosmos 782
- Kosmos 8
- Kosmos 801
- Kosmos 803
- Kosmos 818
- Kosmos 839
- Kosmos 849
- Kosmos 850
- Kosmos 862
- Kosmos 869
- Kosmos 880