321.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Wed, 15 Dec 2021 (885 days ago) in Orion

322.

Comae Berenicid meteor shower 2021 The Comae Berenicid meteor shower reaches its peak. Wed, 15 Dec 2021 (884 days ago) in Leo

323.

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, 17 Dec 2021 at 21:14 EDT (883 days ago) in Taurus

324.

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 (882 days ago) in Taurus

325.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 18 Dec 2021 at 23:35 EDT (881 days ago) in Taurus

326.

December Leonis Minorid meteor shower 2021 The December Leonis Minorid meteor shower reaches its peak. Sun, 19 Dec 2021 (881 days ago) in Leo Minor

327.

December solstice 21 December will be the shortest day of 2021 in the northern hemisphere. Tue, 21 Dec 2021 at 10:53 EDT (879 days ago) in Sagittarius

328.

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 (879 days ago) in Sagittarius

329.

Ursid meteor shower 2021 The Ursid meteor shower reaches its peak. Wed, 22 Dec 2021 (878 days ago) in Ursa Minor

330.

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 (874 days ago) in Virgo

331.

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 (872 days ago) in Monoceros

332.

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 (872 days ago) in Sagittarius

333.

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 (871 days ago) in Monoceros

334.

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 (870 days ago) in Sagittarius

335.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 31 Dec 2021 at 14:52 EDT (869 days ago) in Ophiuchus

336.

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 (869 days ago) in Ophiuchus

337.

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 (869 days ago) in Ophiuchus

338.

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 (868 days ago) in Sagittarius

339.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 02 Jan 2022 at 13:34 EDT (867 days ago) in Sagittarius

340.

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 (867 days ago) in Sagittarius