301.

Mercury at greatest elongation east Mercury is bright and well placed in the evening sky. Mon, 17 May 2021 at 04:14 EDT (1,157 days ago) in Taurus

302.

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 15:13 EDT (1,155 days ago) in Leo

303.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Sun, 23 May 2021 at 05:36 EDT (1,151 days ago) in Capricornus

304.

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 21:49 EDT (1,149 days ago) in Libra

305.

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 04:05 EDT (1,148 days ago) in Scorpius

306.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 26 May 2021 at 07:13 EDT (1,148 days ago) in Scorpius

307.

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 07:18 EDT (1,148 days ago) in Scorpius

308.

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 15:46 EDT (1,147 days ago) in Ophiuchus

309.

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 19:07 EDT (1,146 days ago) in Sagittarius

310.

Messier 4 is well placed The globular cluster M4 (NGC 6121; mag 5.4) in Scorpius culminates at around midnight local time. Fri, 28 May 2021 (1,146 days ago) in Scorpius

311.

Conjunction of Venus and Mercury Venus and Mercury share the same right ascension, at a separation of 25'. Sat, 29 May 2021 at 01:34 EDT (1,145 days ago) in Taurus

312.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 4°10'. Sun, 30 May 2021 at 21:18 EDT (1,144 days ago) in Capricornus

313.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Sun, 30 May 2021 at 23:06 EDT (1,144 days ago) in Capricornus

314.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°37'. Tue, 01 Jun 2021 at 05:00 EDT (1,142 days ago) in Aquarius

315.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Tue, 01 Jun 2021 at 07:56 EDT (1,142 days ago) in Aquarius

316.

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. Wed, 02 Jun 2021 at 03:25 EDT (1,141 days ago) in Aquarius

317.

The Great Globular Cluster in Hercules is well placed The Great Globular Cluster in Hercules (M13, NGC 6205; mag 5.8) culminates at around midnight local time. Wed, 02 Jun 2021 (1,141 days ago) in Hercules

318.

Asteroid 63 Ausonia at opposition Asteroid 63 Ausonia makes closest approach to the Earth. Thu, 03 Jun 2021 at 03:10 EDT (1,140 days ago) in Scorpius

319.

Messier 12 is well placed The globular cluster M12 (NGC 6218; mag 6.1) in Ophiuchus culminates at around midnight local time. Thu, 03 Jun 2021 (1,140 days ago) in Ophiuchus

320.

Conjunction of Uranus and Ceres Uranus and Ceres share the same right ascension, at a separation of 6°26'. Fri, 04 Jun 2021 at 20:31 EDT (1,139 days ago) in Cetus