Portal:History of science/Selected anniversaries/December 9
- 1508 - Birth of Gemma Frisius, Dutch mathematician and cartographer (d. 1555)
- 1625 - Death of Ubbo Emmius, Dutch historian and geographer (b. 1547)
- 1667 - Birth of William Whiston, English mathematician (d. 1752)
- 1718 - Vincenzo Coronelli, Italian cartographer and encyclopaedist (b. 1650)
- 1748 - Birth of Claude Louis Berthollet, French chemist (d. 1822)
- 1868 - Birth of Fritz Haber, German chemist, Nobel Prize laureate (d. 1934)
- 1883 - Birth of Nikolai Luzin, Russian mathematician (d. 1950)
- 1894 - Death of Pafnuty Chebyshev, Russian mathematician (b. 1821)
- 1917 - Birth of James Rainwater, American physicist, Nobel laureate (d. 1986)
- 1919 - Birth of William Lipscomb, American chemist, Nobel laureate
- 1926 - Birth of Henry Way Kendall, American physicist, Nobel laureate (d. 1999)
- 1937 - Death of Nils Gustaf Dalén, Swedish physicist, Nobel laureate (b. 1869)
- 1955 - Death of Hermann Weyl, German mathematician (b. 1885)