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. Wed, 04 Dec 2019 at 01:58 EDT (1,598 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 23:08 EDT (1,597 days ago) in Aquarius

3.

December φ-Cassiopeid meteor shower 2019 The December φ-Cassiopeid meteor shower reaches its peak. Fri, 06 Dec 2019 (1,596 days ago) in Andromeda

4.

Puppid-Velid meteor shower 2019 The Puppid-Velid meteor shower reaches its peak. Sat, 07 Dec 2019 (1,595 days ago) in Vela

5.

Comet 2I/Borisov passes perihelion Comet 2I/Borisov makes its closest approach to the Sun. Sun, 08 Dec 2019 (1,594 days ago) in Crater

6.

Monocerotid meteor shower 2019 The Monocerotid meteor shower reaches its peak. Mon, 09 Dec 2019 (1,593 days ago) in Monoceros

7.

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 16:41 EDT (1,592 days ago) in Taurus

8.

Conjunction of Venus and Saturn Venus and Saturn share the same right ascension, at a separation of 1°48'. Tue, 10 Dec 2019 at 23:45 EDT (1,591 days ago) in Sagittarius

9.

Close approach of Venus and Saturn Venus and Saturn pass within 1°47' of each other. Wed, 11 Dec 2019 at 04:28 EDT (1,591 days ago) in Sagittarius

10.

Full Moon The Moon reaches full phase and is visible for much of the night. Thu, 12 Dec 2019 at 00:12 EDT (1,590 days ago) in Taurus

11.

σ-Hydrid meteor shower 2019 The σ-Hydrid meteor shower reaches its peak. Thu, 12 Dec 2019 (1,590 days ago) in Hydra

12.

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 (1,590 days ago) in Dorado

13.

Conjunction of Venus and Pluto Venus and Pluto share the same right ascension, at a separation of 1°08'. Fri, 13 Dec 2019 at 12:23 EDT (1,589 days ago) in Sagittarius

14.

Geminid meteor shower 2019 The Geminid meteor shower reaches its peak. Sat, 14 Dec 2019 (1,588 days ago) in Gemini

15.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sun, 15 Dec 2019 at 11:51 EDT (1,587 days ago) in Cancer

16.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Sun, 15 Dec 2019 (1,587 days ago) in Orion

17.

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 (1,587 days ago) in Orion

18.

Comae Berenicid meteor shower 2019 The Comae Berenicid meteor shower reaches its peak. Mon, 16 Dec 2019 (1,586 days ago) in Leo

19.

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 15:25 EDT (1,584 days ago) in Leo

20.

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 23:57 EDT (1,583 days ago) in Virgo