241.

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 (259 days ago) in Virgo

242.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 21 Sep 2025 at 15:55 EDT (259 days ago) in Virgo

243.

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 (258 days ago) in Virgo

244.

Neptune at opposition Neptune is optimally positioned for observation. Tue, 23 Sep 2025 at 08:45 EDT (257 days ago) in Pisces

245.

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 (256 days ago) in Virgo

246.

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 (256 days ago) in Virgo

247.

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 (256 days ago) in Sculptor

248.

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 (254 days ago) in Libra

249.

Daytime Sextantid meteor shower 2025 The Daytime Sextantid meteor shower reaches its peak. Sat, 27 Sep 2025 (253 days ago) in Sextans

250.

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 (253 days ago) in Scorpius

251.

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 (253 days ago) in Tucana

252.

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 (251 days ago) in Sagittarius

253.

Venus at perihelion Venus passes its closest point to the Sun. Thu, 02 Oct 2025 at 07:35 EDT (248 days ago) in Leo

254.

1 Ceres at opposition 1 Ceres is optimally positioned for observation, appearing at its closest and brightest. Thu, 02 Oct 2025 at 09:08 EDT (248 days ago) in Cetus

255.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Thu, 02 Oct 2025 (248 days ago) in Andromeda

256.

NGC 253 is well placed The Sculptor Galaxy NGC 253 (mag 7.1) culminates at around midnight local time. Fri, 03 Oct 2025 (247 days ago) in Sculptor

257.

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 (246 days ago) in Coma Berenices

258.

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 (246 days ago) in Aquarius

259.

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 (246 days ago) in Tucana

260.

October Camelopardalid meteor shower 2025 The October Camelopardalid meteor shower reaches its peak. Sun, 05 Oct 2025 (245 days ago) in Draco