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. Mon, 21 May 2018 at 23:49 EDT (2,167 days ago) in Leo

2.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sun, 20 May 2018 at 08:05 EDT (2,168 days ago) in Cancer

3.

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. Thu, 17 May 2018 at 17:04 EDT (2,171 days ago) in Orion

4.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 4°49'. Thu, 17 May 2018 at 14:08 EDT (2,171 days ago) in Taurus

5.

Venus at perihelion Venus passes its orbit's closest point to the Sun. Tue, 15 May 2018 at 19:15 EDT (2,173 days ago) in Taurus

6.

New Moon The Moon disappears into the Sun's glare for a few days. Tue, 15 May 2018 at 07:48 EDT (2,173 days ago) in Taurus

7.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 2°23'. Sun, 13 May 2018 at 13:19 EDT (2,175 days ago) in Pisces

8.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Sun, 13 May 2018 at 06:25 EDT (2,175 days ago) in Pisces

9.

Messier 5 is well placed The globular cluster M5 (NGC 5904; mag 5.7) in Serpens culminates at around midnight local time. Sat, 12 May 2018 (2,176 days ago) in Serpens Caput

10.

Conjunction of Mercury and Uranus Mercury and Uranus share the same right ascension, at a separation of 2°24'. Sat, 12 May 2018 at 17:00 EDT (2,176 days ago) in Aries

11.

Conjunction of Mercury and Eris Mercury and Eris share the same right ascension, at a separation of 9°46'. Fri, 11 May 2018 at 16:55 EDT (2,177 days ago) in Cetus

12.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Thu, 10 May 2018 at 07:53 EDT (2,178 days ago) in Libra

13.

Jupiter at opposition Jupiter lies in the opposite direction to the Sun in the sky, making it slightly closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Tue, 08 May 2018 at 20:31 EDT (2,180 days ago) in Libra

14.

η-Lyrid meteor shower 2018 The η-Lyrid meteor shower reaches its peak. Tue, 08 May 2018 (2,180 days ago) in Lyra

15.

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, 07 May 2018 at 22:09 EDT (2,181 days ago) in Capricornus

16.

η-Aquariid meteor shower 2018 The η-Aquariid meteor shower reaches its peak. Sun, 06 May 2018 (2,182 days ago) in Aquarius

17.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 2°44'. Sun, 06 May 2018 at 03:24 EDT (2,182 days ago) in Sagittarius

18.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Sun, 06 May 2018 at 02:49 EDT (2,182 days ago) in Sagittarius

19.

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. Sat, 05 May 2018 at 20:34 EDT (2,183 days ago) in Sagittarius

20.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 04 May 2018 at 16:16 EDT (2,184 days ago) in Sagittarius