421.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 12 Jun 2020 at 22:08 EDT (1,471 days ago) in Aquarius

422.

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. Sat, 13 Jun 2020 at 02:24 EDT (1,470 days ago) in Aquarius

423.

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, 14 Jun 2020 at 20:56 EDT (1,469 days ago) in Cetus

424.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Mon, 15 Jun 2020 (1,468 days ago) in Scorpius

425.

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. Tue, 16 Jun 2020 (1,467 days ago) in Scorpius

426.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Tue, 16 Jun 2020 (1,467 days ago) in Ara

427.

Comet C/2019 U6 (Lemmon) passes perihelion Comet C/2019 U6 (Lemmon) makes its closest approach to the Sun. Thu, 18 Jun 2020 (1,465 days ago) in Hydra

428.

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 2020 (1,465 days ago) in Ophiuchus

429.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Fri, 19 Jun 2020 at 04:32 EDT (1,464 days ago) in Taurus

430.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation visible from countries and territories including Russia, Greenland, Canada and Sweden amongst others. Fri, 19 Jun 2020 at 04:32 EDT (1,464 days ago) in Taurus

431.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 44'. Fri, 19 Jun 2020 at 04:54 EDT (1,464 days ago) in Taurus

432.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Sat, 20 Jun 2020 at 06:31 EDT (1,463 days ago) in Taurus

433.

June solstice 20 June will be the longest day of 2020 in the northern hemisphere. Sat, 20 Jun 2020 at 17:36 EDT (1,463 days ago) in Taurus

434.

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 2020 (1,463 days ago) in Scorpius

435.

Annular solar eclipse There will be an eclipse of the Sun, visible from Asia and Africa. Sun, 21 Jun 2020 at 02:41 EDT (1,462 days ago) in Taurus

436.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 21 Jun 2020 at 02:42 EDT (1,462 days ago) in Taurus

437.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 3°52'. Mon, 22 Jun 2020 at 03:19 EDT (1,461 days ago) in Gemini

438.

Comet C/2019 U6 (Lemmon) reaches peak brightness Comet C/2019 U6 (Lemmon) is forecast to reach the brightest point in its 2020 apparition. Mon, 22 Jun 2020 (1,461 days ago) in Hydra

439.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Mon, 22 Jun 2020 (1,461 days ago) in Sagittarius

440.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Mon, 22 Jun 2020 at 22:58 EDT (1,461 days ago) in Aquarius