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:
20th century in outer space
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15th
16th
17th
18th
19th
20th
21st
22nd
23rd
24th
25th
Subcategories
This category has the following 10 subcategories, out of 10 total.
0–9
1940s in outer space
(4 C, 1 P)
1950s in outer space
(10 C)
1960s in outer space
(11 C)
1970s in outer space
(11 C)
1980s in outer space
(11 C)
1990s in outer space
(11 C)
A
Astronomical objects discovered in the 20th century
(101 C)
E
20th-century astronomical events
(3 C, 9 P)
S
20th-century solar eclipses
(224 P)
20th century in spaceflight
(8 C, 2 P)