301.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Mon, 28 Aug 2023 at 22:11 EDT (258 days ago) in Aries

302.

The Moon at aphelion The Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon. Tue, 29 Aug 2023 at 04:36 EDT (257 days ago) in Capricornus

303.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month. Wed, 30 Aug 2023 at 11:54 EDT (256 days ago) in Aquarius

304.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°29'. Wed, 30 Aug 2023 at 14:07 EDT (256 days ago) in Aquarius

305.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Wed, 30 Aug 2023 at 15:43 EDT (256 days ago) in Aquarius

306.

Blue Moon The Moon reaches full phase and is visible for much of the night. Wed, 30 Aug 2023 at 21:35 EDT (256 days ago) in Aquarius

307.

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 (254 days ago) in Pisces

308.

Aurigid meteor shower 2023 The Aurigid meteor shower reaches its peak. Fri, 01 Sep 2023 (254 days ago) in Auriga

309.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Mon, 04 Sep 2023 at 10:13 EDT (251 days ago) in Aries

310.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Mon, 04 Sep 2023 at 13:37 EDT (251 days ago) in Aries

311.

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 (251 days ago) in Aries

312.

Close approach of the Moon and M45 The Moon and M45 pass close to each other. Tue, 05 Sep 2023 at 16:51 EDT (250 days ago) in Taurus

313.

Mercury at inferior solar conjunction Mercury passes around the near side of the Sun. Wed, 06 Sep 2023 at 07:04 EDT (249 days ago) in Leo

314.

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 (249 days ago) in Taurus

315.

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 (248 days ago) in Taurus

316.

September ε-Perseid meteor shower 2023 The September ε-Perseid meteor shower reaches its peak. Sat, 09 Sep 2023 (246 days ago) in Perseus

317.

Comet C/2023 P1 (Nishimura) passes perigee Comet C/2023 P1 (Nishimura) makes its closest approach to the Earth. Tue, 12 Sep 2023 (243 days ago) in Leo

318.

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 (243 days ago) in Leo

319.

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 (242 days ago) in Leo

320.

New Moon The Moon disappears into the Sun's glare for a few days. Thu, 14 Sep 2023 at 21:41 EDT (241 days ago) in Leo