161.

Partial solar eclipse There will be an eclipse of the Sun, visible from parts of Antarctica and Oceania. Sun, 21 Sep 2025 at 15:42 EDT (202 days ago) in Virgo

162.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 21 Sep 2025 at 15:55 EDT (202 days ago) in Virgo

163.

September equinox Day and night have equal length: the beginning of astronomical autumn in the northern hemisphere. Mon, 22 Sep 2025 at 14:20 EDT (201 days ago) in Virgo

164.

Neptune at opposition Neptune is optimally positioned for observation. Tue, 23 Sep 2025 at 08:45 EDT (200 days ago) in Pisces

165.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 3°56'. Wed, 24 Sep 2025 at 10:51 EDT (199 days ago) in Virgo

166.

The Moon at perihelion The Moon passes its closest point to the Sun, a monthly occurrence around the time of new moon. Wed, 24 Sep 2025 at 17:45 EDT (199 days ago) in Virgo

167.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Wed, 24 Sep 2025 (199 days ago) in Sculptor

168.

The Moon at apogee The Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month. Fri, 26 Sep 2025 at 05:45 EDT (197 days ago) in Libra

169.

Daytime Sextantid meteor shower 2025 The Daytime Sextantid meteor shower reaches its peak. Sat, 27 Sep 2025 (196 days ago) in Sextans

170.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from Antarctica, French Southern Territories and Bouvet Island. Sat, 27 Sep 2025 at 14:05 EDT (196 days ago) in Scorpius

171.

47 Tuc is well placed The second brightest globular cluster in the sky, 47 Tuc (NGC 104; mag 4.0), in Tucana culminates at around midnight local time. Sat, 27 Sep 2025 (196 days ago) in Tucana

172.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and remaining visible until around midnight. Mon, 29 Sep 2025 at 19:54 EDT (194 days ago) in Sagittarius

173.

Venus at perihelion Venus passes its closest point to the Sun. Thu, 02 Oct 2025 at 07:34 EDT (191 days ago) in Leo

174.

1 Ceres at opposition 1 Ceres is optimally positioned for observation, appears at its closest and brightest. Thu, 02 Oct 2025 at 09:08 EDT (191 days ago) in Cetus

175.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Thu, 02 Oct 2025 (191 days ago) in Andromeda

176.

NGC 253 is well placed The Sculptor Galaxy NGC 253 (mag 7.1) culminates at around midnight local time. Fri, 03 Oct 2025 (190 days ago) in Sculptor

177.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sat, 04 Oct 2025 at 01:21 EDT (189 days ago) in Coma Berenices

178.

The Moon at aphelion The Moon passes its furthest point from the Sun, a monthly occurrence around the time of full moon. Sat, 04 Oct 2025 at 10:10 EDT (189 days ago) in Aquarius

179.

The Small Magellanic Cloud is well placed The Milky Way's dwarf companion, the Small Magellanic Cloud (SMC; mag 2.7), in Tucana culminates at around midnight local time. Sat, 04 Oct 2025 (189 days ago) in Tucana

180.

October Camelopardalid meteor shower 2025 The October Camelopardalid meteor shower reaches its peak. Sun, 05 Oct 2025 (188 days ago) in Draco