301.

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. Sat, 18 Dec 2021 at 01:57 EDT (873 days ago) in Taurus

302.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 18 Dec 2021 at 23:35 EDT (872 days ago) in Taurus

303.

December Leonis Minorid meteor shower 2021 The December Leonis Minorid meteor shower reaches its peak. Sun, 19 Dec 2021 (872 days ago) in Leo Minor

304.

December solstice 21 December will be the shortest day of 2021 in the northern hemisphere. Tue, 21 Dec 2021 at 10:53 EDT (870 days ago) in Sagittarius

305.

Conjunction of Venus and Pluto Venus and Pluto share the same right ascension, at a separation of 2°09'. Tue, 21 Dec 2021 at 21:55 EDT (870 days ago) in Sagittarius

306.

Ursid meteor shower 2021 The Ursid meteor shower reaches its peak. Wed, 22 Dec 2021 (869 days ago) in Ursa Minor

307.

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. Sun, 26 Dec 2021 at 21:24 EDT (865 days ago) in Virgo

308.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Tue, 28 Dec 2021 (863 days ago) in Monoceros

309.

Conjunction of Venus and Mercury Venus and Mercury share the same right ascension, at a separation of 4°13'. Tue, 28 Dec 2021 at 20:10 EDT (863 days ago) in Sagittarius

310.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Wed, 29 Dec 2021 (862 days ago) in Monoceros

311.

Conjunction of Mercury and Pluto Mercury and Pluto share the same right ascension, at a separation of 13'. Thu, 30 Dec 2021 at 09:27 EDT (861 days ago) in Sagittarius

312.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 31 Dec 2021 at 14:52 EDT (860 days ago) in Ophiuchus

313.

Lunar occultation of Mars The Moon will pass in front of Mars, creating a lunar occultation visible from Australia. Fri, 31 Dec 2021 at 14:52 EDT (860 days ago) in Ophiuchus

314.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 56'. Fri, 31 Dec 2021 at 15:13 EDT (860 days ago) in Ophiuchus

315.

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. Sat, 01 Jan 2022 at 17:55 EDT (859 days ago) in Sagittarius

316.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 02 Jan 2022 at 13:34 EDT (858 days ago) in Sagittarius

317.

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, 02 Jan 2022 at 15:54 EDT (858 days ago) in Sagittarius

318.

The cluster Messier 41 is well placed The open star cluster M41 (NGC 2287; mag 4.5) in Canis Major culminates at around midnight local time. Sun, 02 Jan 2022 (858 days ago) in Canis Major

319.

Comet C/2021 A1 (Leonard) passes perihelion Comet C/2021 A1 (Leonard) makes its closest approach to the Sun. Mon, 03 Jan 2022 (857 days ago)

320.

Quadrantid meteor shower 2022 The Quadrantid meteor shower reaches its peak. Mon, 03 Jan 2022 (857 days ago) in Bootes