281.

Neptune at opposition Neptune lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Tue, 19 Sep 2023 at 07:09 EDT (273 days ago) in Pisces

282.

Venus at greatest brightness Venus reaches its greatest brightness in the dawn sky. Mon, 18 Sep 2023 at 08:09 EDT (274 days ago) in Cancer

283.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Sun, 17 Sep 2023 at 13:19 EDT (275 days ago) in Virgo

284.

Comet C/2023 P1 (Nishimura) passes perihelion Comet C/2023 P1 (Nishimura) makes its closest approach to the Sun. Sun, 17 Sep 2023 (275 days ago) in Virgo

285.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 39'. Sat, 16 Sep 2023 at 15:20 EDT (276 days ago) in Virgo

286.

New Moon The Moon disappears into the Sun's glare for a few days. Thu, 14 Sep 2023 at 21:41 EDT (278 days ago) in Leo

287.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 5°59'. Wed, 13 Sep 2023 at 13:41 EDT (279 days ago) in Leo

288.

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. Tue, 12 Sep 2023 at 11:42 EDT (280 days ago) in Leo

289.

Comet C/2023 P1 (Nishimura) passes perigee Comet C/2023 P1 (Nishimura) makes its closest approach to the Earth. Tue, 12 Sep 2023 (280 days ago) in Leo

290.

September ε-Perseid meteor shower 2023 The September ε-Perseid meteor shower reaches its peak. Sat, 09 Sep 2023 (283 days ago) in Perseus

291.

Lunar occultation of Beta Tauri The Moon will pass in front of Beta Tauri (Elnath) creating a lunar occultation, though it will open be visible only at sea. Thu, 07 Sep 2023 at 11:20 EDT (285 days ago) in Taurus

292.

Moon at Last Quarter The Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise. Wed, 06 Sep 2023 at 18:21 EDT (286 days ago) in Taurus

293.

Mercury at inferior solar conjunction Mercury passes around the near side of the Sun. Wed, 06 Sep 2023 at 07:04 EDT (286 days ago) in Leo

294.

Close approach of the Moon and M45 The Moon and M45 pass close to each other. Tue, 05 Sep 2023 at 16:51 EDT (287 days ago) in Taurus

295.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°18'. Mon, 04 Sep 2023 at 15:47 EDT (288 days ago) in Aries

296.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Mon, 04 Sep 2023 at 13:37 EDT (288 days ago) in Aries

297.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Mon, 04 Sep 2023 at 10:13 EDT (288 days ago) in Aries

298.

Aurigid meteor shower 2023 The Aurigid meteor shower reaches its peak. Fri, 01 Sep 2023 (291 days ago) in Auriga

299.

Lunar occultation of Neptune The Moon will pass in front of Neptune creating a lunar occultation, though it will open be visible only at sea. Fri, 01 Sep 2023 at 04:21 EDT (291 days ago) in Pisces

300.

Blue Moon The Moon reaches full phase and is visible for much of the night. Wed, 30 Aug 2023 at 21:35 EDT (293 days ago) in Aquarius