Portal:Astronomy/Events/May 2017
| 5 May, 11:52 | Mars at northward equinox |
| 7 May, 12:00 | Eta Aquariids peak |
| 10 May, 21:43 | Full moon |
| 12 May, 19:38 | Moon at apogee |
| 17 May, 23:24 | Mercury at greatest western elongation |
| 20 May, 05:31 | Moon occults Neptune |
| 25 May, 03:00 | Saturn at northern solstice |
| 25 May, 19:45 | New moon |
| 26 May, 01:15 | Moon at perigee |
| 28 May | Comet PANSTARRS at maximum brightness |