1.

Messier 92 is well placed The globular cluster M92 (NGC 6341; mag 6.5) in Hercules culminates at around midnight local time. Fri, 11 Jun 2021 (1,486 days ago) in Hercules

2.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 1°28'. Fri, 11 Jun 2021 at 23:42 PDT (1,486 days ago) in Gemini

3.

Venus at perihelion Venus passes its orbit's closest point to the Sun. Sat, 12 Jun 2021 at 14:18 PDT (1,485 days ago) in Gemini

4.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 2°48'. Sun, 13 Jun 2021 at 12:52 PDT (1,484 days ago) in Cancer

5.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Sun, 13 Jun 2021 at 13:47 PDT (1,484 days ago) in Cancer

6.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Tue, 15 Jun 2021 (1,482 days ago) in Scorpius

7.

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, 16 Jun 2021 (1,481 days ago) in Scorpius

8.

Comet 15P/Finlay passes perigee Comet 15P/Finlay makes its closest approach to the Earth. Thu, 17 Jun 2021 (1,480 days ago) in Pisces

9.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Thu, 17 Jun 2021 (1,480 days ago) in Ara

10.

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. Thu, 17 Jun 2021 at 20:54 PDT (1,480 days ago) in Virgo

11.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Fri, 18 Jun 2021 (1,479 days ago) in Ophiuchus

12.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Sun, 20 Jun 2021 at 08:07 PDT (1,477 days ago) in Aquarius

13.

The Ptolemy cluster is well placed The Ptolemy Cluster (M7, NGC 6475; mag 3.3) in Scorpius culminates at around midnight local time. Sun, 20 Jun 2021 (1,477 days ago) in Scorpius

14.

June solstice 21 June will be the longest day of 2021 in the northern hemisphere. Sun, 20 Jun 2021 at 20:25 PDT (1,477 days ago) in Taurus

15.

Lunar occultation of Beta1 Scorpii The Moon will pass in front of Beta1 Scorpii (Acrab), creating a lunar occultation visible from Sub-Saharan Africa, Australia and Heard Island and McDonald Islands. Tue, 22 Jun 2021 at 11:28 PDT (1,475 days ago) in Scorpius

16.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Tue, 22 Jun 2021 (1,475 days ago) in Sagittarius

17.

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. Wed, 23 Jun 2021 at 02:54 PDT (1,474 days ago) in Ophiuchus

18.

Close approach of Mars and M44 Mars and M44 pass close to each other. Wed, 23 Jun 2021 at 15:35 PDT (1,474 days ago) in Cancer

19.

NGC 6541 is well placed The globular cluster NGC 6541 (mag 6.6) in Corona Australis culminates at around midnight local time. Wed, 23 Jun 2021 (1,474 days ago) in Corona Australis

20.

Full Moon The Moon reaches full phase and is visible for much of the night. Thu, 24 Jun 2021 at 11:39 PDT (1,473 days ago) in Sagittarius