521.

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. Fri, 27 Oct 2017 at 18:22 EDT (2,455 days ago) in Capricornus

522.

The Perseus Double Cluster is well placed The Perseus Double Cluster (NGC 869 and NGC 884; combined mag 4.3) culminates at around midnight local time. Thu, 26 Oct 2017 (2,456 days ago) in Perseus

523.

Jupiter at solar conjunction Jupiter is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 26 Oct 2017 at 13:58 EDT (2,456 days ago) in Virgo

524.

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. Tue, 24 Oct 2017 at 22:25 EDT (2,458 days ago) in Sagittarius

525.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Tue, 24 Oct 2017 at 18:19 EDT (2,458 days ago) in Virgo

526.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Tue, 24 Oct 2017 at 08:13 EDT (2,458 days ago) in Ophiuchus

527.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°15'. Tue, 24 Oct 2017 at 07:36 EDT (2,458 days ago) in Ophiuchus

528.

Leonis Minorid meteor shower 2017 The Leonis Minorid meteor shower reaches its peak. Tue, 24 Oct 2017 (2,458 days ago) in Leo Minor

529.

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. Sun, 22 Oct 2017 at 15:24 EDT (2,460 days ago) in Scorpius

530.

Asteroid 2 Pallas at opposition Asteroid 2 Pallas makes closest approach to the Earth. Sun, 22 Oct 2017 at 12:46 EDT (2,460 days ago) in Eridanus

531.

Comet 96P/Machholz passes perihelion Comet 96P/Machholz makes its closest approach to the Sun. Sat, 21 Oct 2017 (2,461 days ago) in Virgo

532.

Orionid meteor shower 2017 The Orionid meteor shower reaches its peak. Sat, 21 Oct 2017 (2,461 days ago) in Orion

533.

New Moon The Moon disappears into the Sun's glare for a few days. Thu, 19 Oct 2017 at 15:13 EDT (2,463 days ago) in Virgo

534.

Uranus at opposition Uranus lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Thu, 19 Oct 2017 at 13:26 EDT (2,463 days ago) in Pisces

535.

ε-Geminid meteor shower 2017 The ε-Geminid meteor shower reaches its peak. Wed, 18 Oct 2017 (2,464 days ago) in Gemini

536.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 1°58'. Tue, 17 Oct 2017 at 20:21 EDT (2,465 days ago) in Virgo

537.

136108 Haumea at solar conjunction 136108 Haumea is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Tue, 17 Oct 2017 at 12:04 EDT (2,465 days ago) in Bootes

538.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Tue, 17 Oct 2017 at 07:12 EDT (2,465 days ago) in Virgo

539.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 1°47'. Tue, 17 Oct 2017 at 06:05 EDT (2,465 days ago) in Virgo

540.

136199 Eris at opposition 136199 Eris lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Mon, 16 Oct 2017 at 13:34 EDT (2,466 days ago) in Cetus