421.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Wed, 15 Dec 2021 (876 days ago) in Orion

422.

Comae Berenicid meteor shower 2021 The Comae Berenicid meteor shower reaches its peak. Wed, 15 Dec 2021 (875 days ago) in Leo

423.

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 (874 days ago) in Taurus

424.

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

425.

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

426.

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

427.

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

428.

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

429.

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

430.

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

431.

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

432.

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

433.

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

434.

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