1.

Lunar occultation of Spica The Moon will pass in front of Spica (Alpha Virginis), creating a lunar occultation visible from parts of Oceania, Chile, Antarctica, Baker Island, Howland Island and Tokelau. Sat, 10 May 2025 at 04:06 EDT (308 days ago) in Virgo

2.

Conjunction of Neptune and Ceres Neptune and Ceres share the same right ascension, at a separation of 8°22'. Sat, 10 May 2025 at 12:11 EDT (308 days ago) in Cetus

3.

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, 10 May 2025 at 20:46 EDT (308 days ago) in Virgo

4.

Messier 5 is well placed The globular cluster M5 (NGC 5904; mag 5.7) in Serpens culminates at around midnight local time. Sun, 11 May 2025 (307 days ago) in Serpens Caput

5.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 12 May 2025 at 12:55 EDT (306 days ago) in Libra

6.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from countries and territories including Argentina, Chile, Uruguay and Antarctica amongst others. Wed, 14 May 2025 at 00:44 EDT (304 days ago) in Scorpius

7.

The Moon at aphelion The Moon passes its furthest point from the Sun, a monthly occurrence around the time of full moon. Wed, 14 May 2025 at 14:59 EDT (304 days ago) in Ophiuchus

8.

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. Sat, 17 May 2025 at 19:23 EDT (301 days ago) in Taurus

9.

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. Tue, 20 May 2025 at 07:59 EDT (298 days ago) in Aquarius

10.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Thu, 22 May 2025 at 11:44 EDT (296 days ago) in Pisces

11.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°49'. Thu, 22 May 2025 at 14:00 EDT (296 days ago) in Pisces

12.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Fri, 23 May 2025 at 16:38 EDT (295 days ago) in Pisces

13.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 3°59'. Fri, 23 May 2025 at 19:51 EDT (295 days ago) in Pisces

14.

The Moon at perihelion The Moon passes its closest point to the Sun, a monthly occurrence around the time of new moon. Sun, 25 May 2025 at 16:15 EDT (293 days ago) in Aries

15.

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. Sun, 25 May 2025 at 21:33 EDT (293 days ago) in Aries

16.

New Moon The Moon disappears into the Sun's glare for a few days. Mon, 26 May 2025 at 23:03 EDT (292 days ago) in Taurus

17.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 5°12'. Wed, 28 May 2025 at 09:13 EDT (290 days ago) in Taurus

18.

Messier 4 is well placed The globular cluster M4 (NGC 6121; mag 5.4) in Scorpius culminates at around midnight local time. Wed, 28 May 2025 (290 days ago) in Scorpius

19.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Fri, 30 May 2025 at 00:19 EDT (288 days ago) in Taurus

20.

Mercury at perihelion Mercury passes its closest point to the Sun. Sat, 31 May 2025 at 09:26 EDT (287 days ago) in Taurus