1.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, appearing larger than at other times of the month – though only very fractionally. Mon, 01 Jan 2018 at 16:48 EDT (3,085 days ago) in Gemini

2.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Mon, 01 Jan 2018 at 19:51 EDT (3,085 days ago) in Ophiuchus

3.

The Moon at aphelion The Moon passes its furthest point from the Sun, a monthly occurrence around the time of full moon. Mon, 01 Jan 2018 at 20:55 EDT (3,085 days ago) in Gemini

4.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 01 Jan 2018 at 21:24 EDT (3,085 days ago) in Gemini

5.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Tue, 02 Jan 2018 at 10:24 EDT (3,084 days ago) in Pisces

6.

Asteroid 8 Flora at opposition Asteroid 8 Flora makes closest approach to the Earth. Tue, 02 Jan 2018 at 14:10 EDT (3,084 days ago) in Gemini

7.

The cluster Messier 41 is well placed The open star cluster M41 (NGC 2287; mag 4.5) in Canis Major culminates at around midnight local time. Tue, 02 Jan 2018 (3,084 days ago) in Canis Major

8.

The Earth at perihelion The Earth reaches its closest point to the Sun. Wed, 03 Jan 2018 at 00:34 EDT (3,083 days ago) in Pisces

9.

Quadrantid meteor shower 2018 The Quadrantid meteor shower reaches its peak. Wed, 03 Jan 2018 (3,083 days ago) in Bootes

10.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including Canada, Greenland, Alaska and Svalbard amongst others. Fri, 05 Jan 2018 at 03:11 EDT (3,081 days ago) in Leo

11.

Close approach of Jupiter and Mars Jupiter and Mars pass within 12' of each other. Sat, 06 Jan 2018 at 19:27 EDT (3,080 days ago) in Libra

12.

Conjunction of Jupiter and Mars Jupiter and Mars share the same right ascension, at a separation of 12'. Sat, 06 Jan 2018 at 22:40 EDT (3,080 days ago) in Libra

13.

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. Mon, 08 Jan 2018 at 17:25 EDT (3,078 days ago) in Virgo

14.

Venus at superior solar conjunction Venus passes around the far side of the Sun. Tue, 09 Jan 2018 at 02:36 EDT (3,077 days ago) in Sagittarius

15.

134340 Pluto at solar conjunction 134340 Pluto is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Tue, 09 Jan 2018 at 04:23 EDT (3,077 days ago) in Sagittarius

16.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°20'. Thu, 11 Jan 2018 at 00:57 EDT (3,075 days ago) in Libra

17.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Thu, 11 Jan 2018 at 03:24 EDT (3,075 days ago) in Libra

18.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 4°33'. Thu, 11 Jan 2018 at 05:02 EDT (3,075 days ago) in Libra

19.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Thu, 11 Jan 2018 at 07:39 EDT (3,075 days ago) in Libra

20.

Supernova SN2018gj discovered A new supernova has been discovered in NGC 6217. Thu, 11 Jan 2018 (3,074 days ago)