Portal:Astronomy/Events/December 2007
| 9 December, 17:40 | New moon | 
| 13 December | Geminid meteor shower peaks | 
| 17 December | Mercury in superior conjunction | 
| 20 December | Pluto in conjunction | 
| 22 December, 06:08 | December solstice | 
| 23 December | Jupiter in conjunction | 
| 24 December, 01:16 | Full moon | 
| 24 December | Mars at opposition |