301.

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. Sun, 07 May 2023 at 09:48 EDT (416 days ago) in Scorpius

302.

Comet C/2020 V2 (ZTF) passes perihelion Comet C/2020 V2 (ZTF) makes its closest approach to the Sun. Mon, 08 May 2023 (415 days ago) in Aries

303.

Venus at highest altitude in evening sky Venus is bright and well placed in the evening sky. Mon, 08 May 2023 (415 days ago) in Cancer

304.

η-Lyrid meteor shower 2023 The η-Lyrid meteor shower reaches its peak. Tue, 09 May 2023 (414 days ago) in Lyra

305.

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. Tue, 09 May 2023 at 15:46 EDT (414 days ago) in Aries

306.

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. Thu, 11 May 2023 at 01:05 EDT (412 days ago) in Capricornus

307.

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. Fri, 12 May 2023 at 10:28 EDT (411 days ago) in Capricornus

308.

Messier 5 is well placed The globular cluster M5 (NGC 5904; mag 5.7) in Serpens culminates at around midnight local time. Fri, 12 May 2023 (411 days ago) in Serpens Caput

309.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°17'. Sat, 13 May 2023 at 09:07 EDT (410 days ago) in Aquarius

310.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Sat, 13 May 2023 at 11:26 EDT (410 days ago) in Aquarius

311.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Sun, 14 May 2023 at 15:27 EDT (409 days ago) in Aries

312.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Wed, 17 May 2023 at 08:40 EDT (406 days ago) in Pisces

313.

Lunar occultation of Jupiter The Moon will pass in front of Jupiter, creating a lunar occultation visible from countries and territories including Canada, the Contiguous United States, Greenland and Mexico amongst others. Wed, 17 May 2023 at 08:40 EDT (406 days ago) in Pisces

314.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 47'. Wed, 17 May 2023 at 09:18 EDT (406 days ago) in Pisces

315.

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. Wed, 17 May 2023 at 20:22 EDT (406 days ago) in Aries

316.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 3°35'. Wed, 17 May 2023 at 21:36 EDT (406 days ago) in Aries

317.

New Moon The Moon disappears into the Sun's glare for a few days. Fri, 19 May 2023 at 11:54 EDT (404 days ago) in Taurus

318.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 2°12'. Tue, 23 May 2023 at 08:09 EDT (400 days ago) in Gemini

319.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Tue, 23 May 2023 at 08:37 EDT (400 days ago) in Gemini

320.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 3°45'. Wed, 24 May 2023 at 13:33 EDT (399 days ago) in Cancer