21.

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, 09 May 2021 at 03:26 PDT (1,076 days ago) in Pisces

22.

New Moon The Moon disappears into the Sun's glare for a few days. Tue, 11 May 2021 at 12:01 PDT (1,074 days ago) in Aries

23.

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. Tue, 11 May 2021 at 14:53 PDT (1,074 days ago) in Aries

24.

Messier 5 is well placed The globular cluster M5 (NGC 5904; mag 5.7) in Serpens culminates at around midnight local time. Tue, 11 May 2021 (1,074 days ago) in Serpens Caput

25.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Tue, 11 May 2021 at 22:20 PDT (1,074 days ago) in Taurus

26.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 42'. Wed, 12 May 2021 at 15:03 PDT (1,073 days ago) in Taurus

27.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation visible from New Zealand, French Polynesia and Pitcairn. Wed, 12 May 2021 at 15:30 PDT (1,073 days ago) in Taurus

28.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 2°08'. Thu, 13 May 2021 at 10:58 PDT (1,072 days ago) in Taurus

29.

Mercury at highest altitude in evening sky Mercury is bright and well placed in the evening sky. Sat, 15 May 2021 (1,070 days ago) in Taurus

30.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 1°28'. Sat, 15 May 2021 at 21:47 PDT (1,070 days ago) in Gemini

31.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Sat, 15 May 2021 at 21:51 PDT (1,070 days ago) in Gemini

32.

Mercury at greatest elongation east Mercury is bright and well placed in the evening sky. Mon, 17 May 2021 at 01:14 PDT (1,068 days ago) in Taurus

33.

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, 19 May 2021 at 12:13 PDT (1,066 days ago) in Leo

34.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Sun, 23 May 2021 at 02:36 PDT (1,062 days ago) in Capricornus

35.

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, 25 May 2021 at 18:49 PDT (1,060 days ago) in Libra

36.

Lunar occultation of Beta1 Scorpii The Moon will pass in front of Beta1 Scorpii (Acrab), creating a lunar occultation visible from countries and territories including Argentina, Chile, Uruguay and Brazil amongst others. Wed, 26 May 2021 at 01:05 PDT (1,059 days ago) in Scorpius

37.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 26 May 2021 at 04:13 PDT (1,059 days ago) in Scorpius

38.

Total lunar eclipse There will be an eclipse of the Moon, visible from Antarctica, the Americas, Oceania, Eastern and Southeast Asia, south-eastern Russia and Alaska. Wed, 26 May 2021 at 04:18 PDT (1,059 days ago) in Scorpius

39.

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. Thu, 27 May 2021 at 12:46 PDT (1,058 days ago) in Ophiuchus

40.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from Africa, Asia, Southern and Eastern Europe, Corsica and RAF Akrotiri. Fri, 28 May 2021 at 16:07 PDT (1,057 days ago) in Sagittarius