581.

Conjunction of Venus and Pluto Venus and Pluto share the same right ascension, at a separation of 20'. Mon, 13 Dec 2021 at 01:48 EDT (930 days ago) in Sagittarius

582.

Geminid meteor shower 2021 The Geminid meteor shower reaches its peak. Tue, 14 Dec 2021 (929 days ago) in Gemini

583.

The Running Man cluster is well placed The Running Man cluster NGC 1977 (mag 4.2) in Orion's sword culminates at around midnight local time. Wed, 15 Dec 2021 (928 days ago) in Orion

584.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Wed, 15 Dec 2021 (928 days ago) in Orion

585.

Comae Berenicid meteor shower 2021 The Comae Berenicid meteor shower reaches its peak. Wed, 15 Dec 2021 (927 days ago) in Leo

586.

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 (926 days ago) in Taurus

587.

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 (925 days ago) in Taurus

588.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 18 Dec 2021 at 23:35 EDT (924 days ago) in Taurus

589.

December Leonis Minorid meteor shower 2021 The December Leonis Minorid meteor shower reaches its peak. Sun, 19 Dec 2021 (924 days ago) in Leo Minor

590.

December solstice 21 December will be the shortest day of 2021 in the northern hemisphere. Tue, 21 Dec 2021 at 10:53 EDT (922 days ago) in Sagittarius

591.

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 (922 days ago) in Sagittarius

592.

Ursid meteor shower 2021 The Ursid meteor shower reaches its peak. Wed, 22 Dec 2021 (921 days ago) in Ursa Minor

593.

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 (917 days ago) in Virgo

594.

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 (915 days ago) in Monoceros

595.

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 (915 days ago) in Sagittarius

596.

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 (914 days ago) in Monoceros

597.

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 (913 days ago) in Sagittarius

598.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 31 Dec 2021 at 14:52 EDT (912 days ago) in Ophiuchus

599.

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 (912 days ago) in Ophiuchus

600.

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 (912 days ago) in Ophiuchus