1.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sun, 18 Apr 2021 at 18:56 PDT (1,543 days ago) in Aries

2.

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, 19 Apr 2021 at 23:59 PDT (1,542 days ago) in Cancer

3.

Lyrid meteor shower 2021 The Lyrid meteor shower reaches its peak. Thu, 22 Apr 2021 (1,539 days ago) in Hercules

4.

Messier 101 is well placed The Pinwheel Galaxy M101 (NGC 5457; mag 7.9) in Ursa Major culminates at around midnight local time. Thu, 22 Apr 2021 (1,539 days ago) in Ursa Major

5.

π-Puppid meteor shower 2021 The π-Puppid meteor shower reaches its peak. Fri, 23 Apr 2021 (1,538 days ago) in Puppis

6.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Mon, 26 Apr 2021 at 18:48 PDT (1,535 days ago) in Aries

7.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 26 Apr 2021 at 20:31 PDT (1,535 days ago) in Libra

8.

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. Tue, 27 Apr 2021 at 08:22 PDT (1,534 days ago) in Libra

9.

Conjunction of Ceres and Eris Ceres and Eris share the same right ascension, at a separation of 4°53'. Wed, 28 Apr 2021 at 10:44 PDT (1,533 days ago) in Cetus

10.

Lunar occultation of Beta1 Scorpii The Moon will pass in front of Beta1 Scorpii (Acrab), creating a lunar occultation visible from Sub-Saharan Africa and Heard Island and McDonald Islands. Wed, 28 Apr 2021 at 14:11 PDT (1,533 days ago) in Scorpius

11.

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. Wed, 28 Apr 2021 at 20:32 PDT (1,533 days ago) in Scorpius

12.

Uranus at solar conjunction Uranus is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Fri, 30 Apr 2021 at 12:44 PDT (1,531 days ago) in Aries

13.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from countries and territories including Hawaii, Midway Atoll, Kingman Reef and Palmyra Atoll amongst others. Sat, 01 May 2021 at 06:37 PDT (1,530 days ago) in Sagittarius

14.

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 09:58 PDT (1,528 days ago) in Capricornus

15.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Mon, 03 May 2021 at 11:49 PDT (1,528 days ago) in Capricornus

16.

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, 03 May 2021 at 12:50 PDT (1,528 days ago) in Capricornus

17.

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 14:02 PDT (1,527 days ago) in Aquarius

18.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Tue, 04 May 2021 at 16:55 PDT (1,527 days ago) in Aquarius

19.

η-Aquariid meteor shower 2021 The η-Aquariid meteor shower reaches its peak. Wed, 05 May 2021 (1,525 days ago) in Aquarius

20.

η-Lyrid meteor shower 2021 The η-Lyrid meteor shower reaches its peak. Sat, 08 May 2021 (1,523 days ago) in Lyra