521.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Wed, 17 Jun 2026 at 16:30 EST (210 days away) in Cancer

522.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation visible from countries and territories including the Contiguous United States, Canada, Brazil and Venezuela amongst others. Wed, 17 Jun 2026 at 16:30 EST (210 days away) in Cancer

523.

The Butterfly cluster is well placed The Butterfly open star cluster (M6, NGC 6405; mag 4.2) in Scorpius culminates at around midnight local time. Wed, 17 Jun 2026 (210 days away) in Scorpius

524.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Wed, 17 Jun 2026 (210 days away) in Ara

525.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Wed, 17 Jun 2026 at 20:52 EST (210 days away) in Cancer

526.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Thu, 18 Jun 2026 (211 days away) in Ophiuchus

527.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including South Africa, Mozambique, Madagascar and Zimbabwe amongst others. Fri, 19 Jun 2026 at 10:55 EST (212 days away) in Leo

528.

Close approach of Venus and M44 Venus and M44 pass close to each other. Fri, 19 Jun 2026 at 22:31 EST (212 days away) in Cancer

529.

The Ptolemy cluster is well placed The Ptolemy Cluster (M7, NGC 6475; mag 3.3) in Scorpius culminates at around midnight local time. Sat, 20 Jun 2026 (213 days away) in Scorpius

530.

June solstice 21 June will be the longest day of 2026 in the northern hemisphere. Sun, 21 Jun 2026 at 04:27 EST (214 days away) in Taurus

531.

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. Sun, 21 Jun 2026 at 17:55 EST (214 days away) in Virgo

532.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Tue, 23 Jun 2026 (216 days away) in Sagittarius

533.

NGC 6541 is well placed The globular cluster NGC 6541 (mag 6.6) in Corona Australis culminates at around midnight local time. Wed, 24 Jun 2026 (217 days away) in Corona Australis

534.

Comet 78P/Gehrels passes perihelion Comet 78P/Gehrels makes its closest approach to the Sun. Thu, 25 Jun 2026 (218 days away) in Taurus

535.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from countries and territories including Antarctica, Australia, New Zealand and Tasmania amongst others. Sat, 27 Jun 2026 at 11:08 EST (220 days away) in Scorpius

536.

June Bootid meteor shower 2026 The June Bootid meteor shower reaches its peak. Sat, 27 Jun 2026 (220 days away) in Bootes

537.

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. Sun, 28 Jun 2026 at 03:10 EST (221 days away) in Ophiuchus

538.

The cluster NGC 6633 is well placed The open star cluster NGC 6633 (mag 4.6) in Ophiuchus culminates at around midnight local time. Mon, 29 Jun 2026 (222 days away) in Ophiuchus

539.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 29 Jun 2026 at 19:56 EST (222 days away) in Sagittarius

540.

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. Tue, 30 Jun 2026 at 00:27 EST (222 days away) in Sagittarius