81.

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 (340 days ago) in Virgo

82.

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 (340 days ago) in Cetus

83.

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 (340 days ago) in Virgo

84.

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 (339 days ago) in Serpens Caput

85.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 12 May 2025 at 12:55 EDT (338 days ago) in Libra

86.

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 (336 days ago) in Scorpius

87.

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 (336 days ago) in Ophiuchus

88.

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 (333 days ago) in Taurus

89.

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 (330 days ago) in Aquarius

90.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Thu, 22 May 2025 at 11:44 EDT (328 days ago) in Pisces

91.

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 (328 days ago) in Pisces

92.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Fri, 23 May 2025 at 16:38 EDT (327 days ago) in Pisces

93.

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 (327 days ago) in Pisces

94.

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 (325 days ago) in Aries

95.

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 (325 days ago) in Aries

96.

New Moon The Moon disappears into the Sun's glare for a few days. Mon, 26 May 2025 at 23:03 EDT (324 days ago) in Taurus

97.

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 (322 days ago) in Taurus

98.

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 (322 days ago) in Scorpius

99.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Fri, 30 May 2025 at 00:19 EDT (320 days ago) in Taurus

100.

Mercury at perihelion Mercury passes its closest point to the Sun. Sat, 31 May 2025 at 09:26 EDT (319 days ago) in Taurus