541.

Venus at superior solar conjunction Venus passes around the far side of the Sun. Tue, 09 Jan 2018 at 02:36 EDT (2,381 days ago) in Sagittarius

542.

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. Mon, 08 Jan 2018 at 17:25 EDT (2,382 days ago) in Virgo

543.

Conjunction of Jupiter and Mars Jupiter and Mars share the same right ascension, at a separation of 12'. Sat, 06 Jan 2018 at 22:40 EDT (2,384 days ago) in Libra

544.

Close approach of Jupiter and Mars Jupiter and Mars pass within 12' of each other. Sat, 06 Jan 2018 at 19:27 EDT (2,384 days ago) in Libra

545.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including Canada, Greenland, Alaska and Svalbard amongst others. Fri, 05 Jan 2018 at 03:11 EDT (2,385 days ago) in Leo

546.

Quadrantid meteor shower 2018 The Quadrantid meteor shower reaches its peak. Wed, 03 Jan 2018 (2,387 days ago) in Bootes

547.

The Earth at perihelion The Earth reaches its closest point to the Sun. Wed, 03 Jan 2018 at 00:34 EDT (2,387 days ago) in Pisces

548.

The cluster Messier 41 is well placed The open star cluster M41 (NGC 2287; mag 4.5) in Canis Major culminates at around midnight local time. Tue, 02 Jan 2018 (2,388 days ago) in Canis Major

549.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Tue, 02 Jan 2018 at 10:24 EDT (2,388 days ago) in Pisces

550.

Asteroid 8 Flora at opposition Asteroid 8 Flora makes closest approach to the Earth. Tue, 02 Jan 2018 at 06:58 EDT (2,388 days ago) in Gemini

551.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 01 Jan 2018 at 21:24 EDT (2,389 days ago) in Gemini

552.

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. Mon, 01 Jan 2018 at 20:55 EDT (2,389 days ago) in Gemini

553.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Mon, 01 Jan 2018 at 19:51 EDT (2,389 days ago) in Ophiuchus

554.

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. Mon, 01 Jan 2018 at 16:48 EDT (2,389 days ago) in Gemini

555.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from countries and territories including Canada, Greenland, the Contiguous United States and Russia amongst others. Sat, 30 Dec 2017 at 19:35 EDT (2,391 days ago) in Taurus

556.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Sat, 30 Dec 2017 at 16:03 EDT (2,391 days ago) in Taurus

557.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Fri, 29 Dec 2017 (2,392 days ago) in Monoceros

558.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Thu, 28 Dec 2017 (2,392 days ago) in Ophiuchus

559.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Thu, 28 Dec 2017 (2,393 days ago) in Monoceros

560.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Wed, 27 Dec 2017 at 18:29 EDT (2,394 days ago) in Ophiuchus