521.

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. Sat, 09 May 2020 at 07:48 EDT (1,499 days ago) in Ophiuchus

522.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Sun, 10 May 2020 at 00:48 EDT (1,498 days ago) in Taurus

523.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Sun, 10 May 2020 at 23:38 EDT (1,498 days ago) in Capricornus

524.

Messier 5 is well placed The globular cluster M5 (NGC 5904; mag 5.7) in Serpens culminates at around midnight local time. Mon, 11 May 2020 (1,497 days ago) in Serpens Caput

525.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 2°15'. Tue, 12 May 2020 at 05:40 EDT (1,496 days ago) in Sagittarius

526.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Tue, 12 May 2020 at 06:09 EDT (1,496 days ago) in Sagittarius

527.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°40'. Tue, 12 May 2020 at 14:10 EDT (1,496 days ago) in Capricornus

528.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Tue, 12 May 2020 at 14:54 EDT (1,496 days ago) in Capricornus

529.

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. Thu, 14 May 2020 at 10:03 EDT (1,494 days ago) in Capricornus

530.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Thu, 14 May 2020 at 10:33 EDT (1,494 days ago) in Sagittarius

531.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 2°45'. Thu, 14 May 2020 at 22:01 EDT (1,494 days ago) in Aquarius

532.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Thu, 14 May 2020 at 23:51 EDT (1,494 days ago) in Aquarius

533.

Comet C/2017 T2 (PANSTARRS) reaches peak brightness Comet C/2017 T2 (PANSTARRS) is forecast to reach the brightest point in its 2020 apparition. Fri, 15 May 2020 (1,493 days ago) in Camelopardalis

534.

Close approach of Jupiter and Saturn Jupiter and Saturn pass within 4°41' of each other. Mon, 18 May 2020 at 00:42 EDT (1,490 days ago) in Capricornus

535.

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. Mon, 18 May 2020 at 03:44 EDT (1,490 days ago) in Cetus

536.

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. Wed, 20 May 2020 at 10:46 EDT (1,488 days ago) in Cetus

537.

Conjunction of Venus and Mercury Venus and Mercury share the same right ascension, at a separation of 53'. Fri, 22 May 2020 at 03:52 EDT (1,486 days ago) in Taurus

538.

New Moon The Moon disappears into the Sun's glare for a few days. Fri, 22 May 2020 at 13:40 EDT (1,486 days ago) in Taurus

539.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 3°41'. Sat, 23 May 2020 at 22:41 EDT (1,485 days ago) in Taurus

540.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 2°46'. Sun, 24 May 2020 at 06:51 EDT (1,484 days ago) in Taurus