Portal:Astronomy/Events/August 2009
| 4 August, 01:00 | Moon at apogee |
| 6 August, 00:39 | Full moon and penumbral lunar eclipse |
| 11 August | Saturn northward equinox |
| 12 August | Perseids peak |
| 14 August, 19:00 | Jupiter at opposition |
| 17 August, 14:00 | Neptune at opposition |
| 19 August, 05:00 | Moon at perigee |
| 20 August, 10:02 | New moon |
| 24 August, 16:00 | Mercury at greatest eastern elongation |
| 31 August, 11:00 | Moon at apogee |