1.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight. Tue, 03 Dec 2019 at 22:58 PDT (2,039 days ago) in Aquarius

2.

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. Wed, 04 Dec 2019 at 20:08 PDT (2,038 days ago) in Aquarius

3.

December φ-Cassiopeid meteor shower 2019 The December φ-Cassiopeid meteor shower reaches its peak. Fri, 06 Dec 2019 (2,036 days ago) in Andromeda

4.

Puppid-Velid meteor shower 2019 The Puppid-Velid meteor shower reaches its peak. Sat, 07 Dec 2019 (2,035 days ago) in Vela

5.

Monocerotid meteor shower 2019 The Monocerotid meteor shower reaches its peak. Mon, 09 Dec 2019 (2,033 days ago) in Monoceros

6.

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. Tue, 10 Dec 2019 at 13:41 PDT (2,032 days ago) in Taurus

7.

Conjunction of Venus and Saturn Venus and Saturn share the same right ascension, at a separation of 1°48'. Tue, 10 Dec 2019 at 20:45 PDT (2,032 days ago) in Sagittarius

8.

Close approach of Venus and Saturn Venus and Saturn pass within 1°47' of each other. Wed, 11 Dec 2019 at 01:28 PDT (2,031 days ago) in Sagittarius

9.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 11 Dec 2019 at 21:12 PDT (2,031 days ago) in Taurus

10.

σ-Hydrid meteor shower 2019 The σ-Hydrid meteor shower reaches its peak. Thu, 12 Dec 2019 (2,030 days ago) in Hydra

11.

The Large Magellanic Cloud is well placed The Milky Way's dwarf companion, the Large Magellanic Cloud (LMC; mag 0.9), in Dorado culminates at around midnight local time. Thu, 12 Dec 2019 (2,030 days ago) in Dorado

12.

Conjunction of Venus and Pluto Venus and Pluto share the same right ascension, at a separation of 1°08'. Fri, 13 Dec 2019 at 04:13 PDT (2,029 days ago) in Sagittarius

13.

Geminid meteor shower 2019 The Geminid meteor shower reaches its peak. Sat, 14 Dec 2019 (2,028 days ago) in Gemini

14.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sun, 15 Dec 2019 at 08:51 PDT (2,027 days ago) in Cancer

15.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Sun, 15 Dec 2019 (2,027 days ago) in Orion

16.

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. Sun, 15 Dec 2019 (2,027 days ago) in Orion

17.

Comae Berenicid meteor shower 2019 The Comae Berenicid meteor shower reaches its peak. Mon, 16 Dec 2019 (2,026 days ago) in Leo

18.

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. Wed, 18 Dec 2019 at 12:25 PDT (2,024 days ago) in Leo

19.

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. Wed, 18 Dec 2019 at 20:57 PDT (2,024 days ago) in Virgo

20.

December Leonis Minorid meteor shower 2019 The December Leonis Minorid meteor shower reaches its peak. Fri, 20 Dec 2019 (2,022 days ago) in Leo Minor