421.

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 (365 days ago) in Virgo

422.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Tue, 27 Jun 2023 at 15:17 EDT (364 days ago) in Gemini

423.

June Bootid meteor shower 2023 The June Bootid meteor shower reaches its peak. Tue, 27 Jun 2023 (364 days ago) in Bootes

424.

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 (362 days ago) in Ophiuchus

425.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Fri, 30 Jun 2023 at 15:28 EDT (361 days ago) in Pisces

426.

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 (361 days ago) in Scorpius

427.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sat, 01 Jul 2023 at 01:12 EDT (360 days ago) in Gemini

428.

Close approach of Venus and Mars Venus and Mars pass within 3°33' of each other. Sat, 01 Jul 2023 at 03:09 EDT (360 days ago) in Leo

429.

Comet C/2023 E1 (ATLAS) passes perihelion Comet C/2023 E1 (ATLAS) makes its closest approach to the Sun. Sat, 01 Jul 2023 (360 days ago)

430.

Messier 22 is well placed The globular cluster M22 (mag 5.2) in Sagittarius, near the Galactic centre, culminates at around midnight local time. Sat, 01 Jul 2023 (360 days ago) in Sagittarius

431.

The cluster IC 4756 is well placed The open star cluster IC 4756 (mag 4.6) in Serpens culminates at around midnight local time. Sun, 02 Jul 2023 (359 days ago) in Serpens Cauda

432.

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. Mon, 03 Jul 2023 at 06:27 EDT (358 days ago) in Sagittarius

433.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 03 Jul 2023 at 07:38 EDT (358 days ago) in Sagittarius

434.

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, 04 Jul 2023 at 18:25 EDT (357 days ago) in Capricornus

435.

The Earth at aphelion The Earth reaches its furthest point from the Sun. Thu, 06 Jul 2023 at 16:06 EDT (355 days ago) in Pisces

436.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°40'. Thu, 06 Jul 2023 at 23:09 EDT (355 days ago) in Aquarius

437.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 07 Jul 2023 at 00:59 EDT (354 days ago) in Aquarius

438.

Asteroid 15 Eunomia at opposition Asteroid 15 Eunomia makes closest approach to the Earth. Fri, 07 Jul 2023 at 19:58 EDT (354 days ago) in Sagittarius

439.

Venus at greatest brightness Venus reaches its greatest brightness in the evening sky. Sun, 09 Jul 2023 at 13:50 EDT (352 days ago) in Leo

440.

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. Sun, 09 Jul 2023 at 21:48 EDT (352 days ago) in Pisces