.
12 December 1970 launch of Uhuru, the first X-ray telescopte satellite 17
12 December 1923 discovery of 1024 Hale
---
12 December 1866 Birth of Alfred Werner
12 December 1889 Death of Victor Yakovlevich Bunyakovsky
12 December 1921 Death of Henrietta Swan Leavitt
December 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |