401.

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, 31 Jul 2021 at 09:16 EDT (1,064 days ago) in Aries

402.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sun, 01 Aug 2021 at 10:14 EDT (1,063 days ago) in Cancer

403.

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. Mon, 02 Aug 2021 at 02:06 EDT (1,062 days ago) in Capricornus

404.

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, 02 Aug 2021 at 03:35 EDT (1,062 days ago) in Taurus

405.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 08 Aug 2021 at 09:51 EDT (1,056 days ago) in Cancer

406.

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. Mon, 09 Aug 2021 at 14:41 EDT (1,055 days ago) in Leo

407.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 4°17'. Mon, 09 Aug 2021 at 20:42 EDT (1,055 days ago) in Leo

408.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 4°17'. Wed, 11 Aug 2021 at 02:59 EDT (1,053 days ago) in Virgo

409.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Wed, 11 Aug 2021 at 06:26 EDT (1,053 days ago) in Virgo

410.

Perseid meteor shower 2021 The Perseid meteor shower reaches its peak. Thu, 12 Aug 2021 (1,052 days ago) in Perseus

411.

Messier 15 is well placed The globular cluster M15 (NGC 7078; mag 6.3) in Pegasus culminates at around midnight local time. Sat, 14 Aug 2021 (1,050 days ago) in Pegasus

412.

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, 15 Aug 2021 at 11:20 EDT (1,049 days ago) in Libra

413.

Messier 2 is well placed The globular cluster M2 (NGC 7089; mag 6.6) in Aquarius culminates at around midnight local time. Sun, 15 Aug 2021 (1,049 days ago) in Aquarius

414.

Lunar occultation of Beta1 Scorpii The Moon will pass in front of Beta1 Scorpii (Acrab), creating a lunar occultation visible from Antarctica, New Zealand and Macquarie Island. Mon, 16 Aug 2021 at 05:00 EDT (1,048 days ago) in Scorpius

415.

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. Tue, 17 Aug 2021 at 05:15 EDT (1,047 days ago) in Ophiuchus

416.

κ-Cygnid meteor shower 2021 The κ-Cygnid meteor shower reaches its peak. Tue, 17 Aug 2021 (1,046 days ago) in Draco

417.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from the Americas, Bonaire, Saint Eustatius and Saba, Clipperton Island, Grenada and Navassa Island. Wed, 18 Aug 2021 at 23:28 EDT (1,046 days ago) in Sagittarius

418.

Conjunction of Mercury and Mars Mercury and Mars share the same right ascension, at a separation of 4'48". Thu, 19 Aug 2021 at 00:09 EDT (1,045 days ago) in Leo

419.

Asteroid 43 Ariadne at opposition Asteroid 43 Ariadne makes closest approach to the Earth. Thu, 19 Aug 2021 at 07:58 EDT (1,045 days ago) in Aquarius

420.

Jupiter at opposition Jupiter 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. Thu, 19 Aug 2021 at 20:20 EDT (1,045 days ago) in Capricornus