1.

December φ-Cassiopeid meteor shower 2020 The December φ-Cassiopeid meteor shower reaches its peak. Sat, 05 Dec 2020 (45 days ago) in Andromeda

2.

Puppid-Velid meteor shower 2020 The Puppid-Velid meteor shower reaches its peak. Sun, 06 Dec 2020 (44 days ago) in Vela

3.

Asteroid 16 Psyche at opposition Asteroid 16 Psyche is well placed for observation. Mon, 07 Dec 2020 at 18:58 EST (43 days ago) in Taurus

4.

Moon at Last Quarter The Moon rises in the east at around midnight and appears high in the sky at sunrise. Mon, 07 Dec 2020 at 19:37 EST (43 days ago) in Leo

5.

Monocerotid meteor shower 2020 The Monocerotid meteor shower reaches its peak. Tue, 08 Dec 2020 (42 days ago) in Monoceros

6.

σ-Hydrid meteor shower 2020 The σ-Hydrid meteor shower reaches its peak. Fri, 11 Dec 2020 (39 days ago) in Hydra

7.

C/2020 S3 (Erasmus) at perihelion C/2020 S3 (Erasmus) makes its closest approach to the Sun. Sat, 12 Dec 2020 (38 days ago) in Scorpius

8.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 0°47'. Sat, 12 Dec 2020 at 15:40 EST (38 days ago) in Libra

9.

The Moon at perigee The Moon appears large as it makes its closest approach to the Earth. Sat, 12 Dec 2020 at 15:42 EST (38 days ago) in Libra

10.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation. Sat, 12 Dec 2020 at 16:07 EST (38 days ago) in Libra

11.

Geminid meteor shower 2020 The Geminid meteor shower reaches its peak. Sun, 13 Dec 2020 (36 days ago) in Gemini

12.

Total solar eclipse There will be an eclipse of the Sun, visible from South America. Mon, 14 Dec 2020 at 11:14 EST (36 days ago) in Ophiuchus

13.

New Moon The Moon disappears into the Sun's glare. Mon, 14 Dec 2020 at 11:17 EST (36 days ago) in Ophiuchus

14.

The Moon at perihelion The Moon reaches its closest point to the Sun. Tue, 15 Dec 2020 at 09:02 EST (35 days ago) in Sagittarius

15.

Comae Berenicid meteor shower 2020 The Comae Berenicid meteor shower reaches its peak. Tue, 15 Dec 2020 (35 days ago) in Leo

16.

Mercury at aphelion Mercury reaches its furthest point from the Sun. Tue, 15 Dec 2020 at 21:30 EST (35 days ago) in Ophiuchus

17.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 2°55'. Wed, 16 Dec 2020 at 23:30 EST (34 days ago) in Sagittarius

18.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°03'. Thu, 17 Dec 2020 at 00:20 EST (33 days ago) in Capricornus

19.

141P/Machholz at perihelion 141P/Machholz makes its closest approach to the Sun. Thu, 17 Dec 2020 (33 days ago) in Aquarius

20.

December Leonis Minorid meteor shower 2020 The December Leonis Minorid meteor shower reaches its peak. Sat, 19 Dec 2020 (31 days ago) in Leo Minor