301.

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. Wed, 30 Aug 2017 at 07:24 EDT (2,467 days ago) in Ophiuchus

302.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°33'. Wed, 30 Aug 2017 at 10:02 EDT (2,467 days ago) in Ophiuchus

303.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Wed, 30 Aug 2017 at 10:49 EDT (2,467 days ago) in Ophiuchus

304.

Aurigid meteor shower 2017 The Aurigid meteor shower reaches its peak. Thu, 31 Aug 2017 (2,465 days ago) in Auriga

305.

Close approach of Venus and M44 Venus and M44 pass close to each other. Fri, 01 Sep 2017 at 09:47 EDT (2,465 days ago) in Cancer

306.

Supernova SN2017glq discovered A new supernova has been discovered in IC 208. Fri, 01 Sep 2017 (2,464 days ago)

307.

Supernova SN2017glx discovered A new supernova has been discovered in NGC 6824. Sat, 02 Sep 2017 (2,463 days ago)

308.

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. Sun, 03 Sep 2017 at 13:06 EDT (2,463 days ago) in Capricornus

309.

Supernova SN2017gmr discovered A new supernova has been discovered in NGC 988. Sun, 03 Sep 2017 (2,462 days ago)

310.

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, 05 Sep 2017 at 01:19 EDT (2,461 days ago) in Aquarius

311.

Lunar occultation of Neptune The Moon will pass in front of Neptune, creating a lunar occultation visible from countries and territories including Antarctica, Argentina, Chile and Brazil amongst others. Wed, 06 Sep 2017 at 00:59 EDT (2,460 days ago) in Aquarius

312.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 06 Sep 2017 at 03:02 EDT (2,460 days ago) in Aquarius

313.

Asteroid 89 Julia at opposition Asteroid 89 Julia makes closest approach to the Earth. Thu, 07 Sep 2017 at 15:10 EDT (2,459 days ago) in Pegasus

314.

September ε-Perseid meteor shower 2017 The September ε-Perseid meteor shower reaches its peak. Sat, 09 Sep 2017 (2,457 days ago) in Perseus

315.

Comet 1I/`Oumuamua passes perihelion Comet 1I/`Oumuamua makes its closest approach to the Sun. Sat, 09 Sep 2017 (2,457 days ago) in Leo

316.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Tue, 12 Sep 2017 at 04:42 EDT (2,454 days ago) in Taurus

317.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Tue, 12 Sep 2017 at 05:19 EDT (2,454 days ago) in Leo

318.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from countries and territories including the Contiguous United States, Canada, Mexico and Alaska amongst others. Tue, 12 Sep 2017 at 08:26 EDT (2,454 days ago) in Taurus

319.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Tue, 12 Sep 2017 at 23:41 EDT (2,454 days ago) in Leo

320.

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, 13 Sep 2017 at 02:25 EDT (2,453 days ago) in Taurus