1.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sun, 18 Apr 2021 at 21:56 EDT (24 days ago) in Aries

2.

Moon at First Quarter The Moon appears high in the sky at sunset and sets in the west at around midnight. Tue, 20 Apr 2021 at 02:59 EDT (22 days ago) in Cancer

3.

Lyrid meteor shower 2021 The Lyrid meteor shower reaches its peak. Thu, 22 Apr 2021 (20 days ago) in Hercules

4.

π-Puppid meteor shower 2021 The π-Puppid meteor shower reaches its peak. Fri, 23 Apr 2021 (19 days ago) in Puppis

5.

Mercury at perihelion Mercury reaches its closest point to the Sun. Mon, 26 Apr 2021 at 21:48 EDT (16 days ago) in Aries

6.

Full Moon The Moon is visible for much of the night. Mon, 26 Apr 2021 at 23:31 EDT (16 days ago) in Libra

7.

The Moon at perigee The Moon appears large as it makes its closest approach to the Earth. Tue, 27 Apr 2021 at 11:22 EDT (15 days ago) in Libra

8.

Conjunction of Ceres and Eris Ceres and Eris share the same right ascension, at a separation of 4°54'. Wed, 28 Apr 2021 at 16:08 EDT (14 days ago) in Cetus

9.

The Moon at aphelion The Moon reaches its furthest point from the Sun. Wed, 28 Apr 2021 at 23:32 EDT (14 days ago) in Scorpius

10.

Uranus at solar conjunction Uranus is unobservable as it passes around the far side of the Sun. Fri, 30 Apr 2021 at 15:44 EDT (12 days ago) in Aries

11.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 4°09'. Mon, 03 May 2021 at 12:58 EDT (9 days ago) in Capricornus

12.

Moon at Last Quarter The Moon rises in the east at around midnight and appears high in the sky at sunrise. Mon, 03 May 2021 at 15:50 EDT (9 days ago) in Capricornus

13.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°36'. Tue, 04 May 2021 at 17:02 EDT (8 days ago) in Aquarius

14.

η-Aquariid meteor shower 2021 The η-Aquariid meteor shower reaches its peak. Wed, 05 May 2021 (6 days ago) in Aquarius

15.

η-Lyrid meteor shower 2021 The η-Lyrid meteor shower reaches its peak. Sat, 08 May 2021 (4 days ago) in Lyra

16.

The Moon at perihelion The Moon reaches its closest point to the Sun. Sun, 09 May 2021 at 06:26 EDT (3 days ago) in Pisces

17.

New Moon The Moon disappears into the Sun's glare. Tue, 11 May 2021 at 15:01 EDT (14 hours ago) in Aries

18.

The Moon at apogee The Moon appears small as it recedes to its furthest point from the Earth. Tue, 11 May 2021 at 17:53 EDT (11 hours ago) in Aries

19.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Wed, 12 May 2021 at 01:20 EDT (4 hours ago) in Taurus

20.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 0°42'. Wed, 12 May 2021 at 18:03 EDT (12 hours away) in Taurus