501.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 1°46'. Wed, 27 Jun 2018 at 23:41 EDT (2,212 days ago) in Sagittarius

502.

June Bootid meteor shower 2018 The June Bootid meteor shower reaches its peak. Wed, 27 Jun 2018 (2,212 days ago) in Bootes

503.

Saturn at opposition Saturn lies in the opposite direction to the Sun in the sky, making it slightly closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Wed, 27 Jun 2018 at 09:20 EDT (2,212 days ago) in Sagittarius

504.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Tue, 26 Jun 2018 at 17:01 EDT (2,213 days ago) in Capricornus

505.

NGC 6541 is well placed The globular cluster NGC 6541 (mag 6.6) in Corona Australis culminates at around midnight local time. Sun, 24 Jun 2018 (2,215 days ago) in Corona Australis

506.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Sat, 23 Jun 2018 (2,216 days ago) in Sagittarius

507.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Sat, 23 Jun 2018 at 17:15 EDT (2,216 days ago) in Libra

508.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°13'. Sat, 23 Jun 2018 at 14:46 EDT (2,216 days ago) in Libra

509.

June solstice 21 June will be the longest day of 2018 in the northern hemisphere. Thu, 21 Jun 2018 at 06:01 EDT (2,218 days ago) in Taurus

510.

The Ptolemy cluster is well placed The Ptolemy Cluster (M7, NGC 6475; mag 3.3) in Scorpius culminates at around midnight local time. Wed, 20 Jun 2018 (2,219 days ago) in Scorpius

511.

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, 20 Jun 2018 at 06:51 EDT (2,219 days ago) in Virgo

512.

Close approach of Venus and M44 Venus and M44 pass close to each other. Wed, 20 Jun 2018 at 06:49 EDT (2,219 days ago) in Cancer

513.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Mon, 18 Jun 2018 (2,221 days ago) in Ophiuchus

514.

Asteroid 4 Vesta at opposition Asteroid 4 Vesta makes closest approach to the Earth. Mon, 18 Jun 2018 at 19:58 EDT (2,221 days ago) in Sagittarius

515.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Mon, 18 Jun 2018 at 19:45 EDT (2,221 days ago) in Aquarius

516.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Sun, 17 Jun 2018 (2,222 days ago) in Ara

517.

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. Sun, 17 Jun 2018 (2,222 days ago) in Scorpius

518.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Sat, 16 Jun 2018 (2,223 days ago) in Scorpius

519.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sat, 16 Jun 2018 at 15:49 EDT (2,223 days ago) in Cancer

520.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 2°20'. Sat, 16 Jun 2018 at 09:11 EDT (2,223 days ago) in Cancer