- 1610 – Galileo Galilei observes phases of Venus.
- 1900 - The peer reviewed journal "Nature" reports on Duddell's "Singing Arc" American Physical Society.
- 1942 - First self-sustained nuclear chain reaction at the University of Chicago under the supervision of Enrico Fermi. American Physical Society
- 1968 – Apollo 8 Launched
- 1995 – Hubble Deep Field images taken.
Births edit
- 1852 - Henri Becquerel
- 1900 - George Eugene Uhlenbeck
- 25 December, 1642 - Isaac Newton
- 5 December, 1901 - Werner Heisenberg
- 18 December, 1856 - J. J. Thomson