261.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 18 Jun 2023 at 00:38 EDT (336 days ago) in Taurus

262.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Sun, 18 Jun 2023 (336 days ago) in Ophiuchus

263.

The Ptolemy cluster is well placed The Ptolemy Cluster (M7, NGC 6475; mag 3.3) in Scorpius culminates at around midnight local time. Tue, 20 Jun 2023 (334 days ago) in Scorpius

264.

June solstice 21 June will be the longest day of 2023 in the northern hemisphere. Wed, 21 Jun 2023 at 10:54 EDT (333 days ago) in Taurus

265.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 3°41'. Wed, 21 Jun 2023 at 20:48 EDT (333 days ago) in Cancer

266.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Wed, 21 Jun 2023 at 23:13 EDT (333 days ago) in Cancer

267.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 3°47'. Thu, 22 Jun 2023 at 06:10 EDT (332 days ago) in Leo

268.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Thu, 22 Jun 2023 at 08:54 EDT (332 days ago) in Leo

269.

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. Thu, 22 Jun 2023 at 14:30 EDT (332 days ago) in Leo

270.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Fri, 23 Jun 2023 (331 days ago) in Sagittarius

271.

NGC 6541 is well placed The globular cluster NGC 6541 (mag 6.6) in Corona Australis culminates at around midnight local time. Sat, 24 Jun 2023 (330 days ago) in Corona Australis

272.

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. Mon, 26 Jun 2023 at 03:50 EDT (328 days ago) in Virgo

273.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Tue, 27 Jun 2023 at 15:17 EDT (327 days ago) in Gemini

274.

June Bootid meteor shower 2023 The June Bootid meteor shower reaches its peak. Tue, 27 Jun 2023 (327 days ago) in Bootes

275.

The cluster NGC 6633 is well placed The open star cluster NGC 6633 (mag 4.6) in Ophiuchus culminates at around midnight local time. Thu, 29 Jun 2023 (325 days ago) in Ophiuchus

276.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Fri, 30 Jun 2023 at 15:28 EDT (324 days ago) in Pisces

277.

Lunar occultation of Delta Scorpii The Moon will pass in front of Delta Scorpii (Dschubba), creating a lunar occultation visible from countries and territories including Antarctica, French Southern Territories, South Georgia and the South Sandwich Islands and Heard Island and McDonald Islands amongst others. Fri, 30 Jun 2023 at 15:54 EDT (324 days ago) in Scorpius

278.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sat, 01 Jul 2023 at 01:12 EDT (323 days ago) in Gemini

279.

Close approach of Venus and Mars Venus and Mars pass within 3°33' of each other. Sat, 01 Jul 2023 at 03:09 EDT (323 days ago) in Leo

280.

Comet C/2023 E1 (ATLAS) passes perihelion Comet C/2023 E1 (ATLAS) makes its closest approach to the Sun. Sat, 01 Jul 2023 (323 days ago)