301.

1 Ceres at perihelion 1 Ceres passes its orbit's closest point to the Sun. Tue, 24 Apr 2018 at 11:42 EDT (2,255 days ago) in Cancer

302.

Messier 101 is well placed The Pinwheel Galaxy M101 (NGC 5457; mag 7.9) in Ursa Major culminates at around midnight local time. Mon, 23 Apr 2018 (2,256 days ago) in Ursa Major

303.

π-Puppid meteor shower 2018 The π-Puppid meteor shower reaches its peak. Mon, 23 Apr 2018 (2,256 days ago) in Puppis

304.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Mon, 23 Apr 2018 at 06:51 EDT (2,256 days ago) in Cetus

305.

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, 22 Apr 2018 at 17:46 EDT (2,257 days ago) in Cancer

306.

Lyrid meteor shower 2018 The Lyrid meteor shower reaches its peak. Sun, 22 Apr 2018 (2,257 days ago) in Hercules

307.

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. Fri, 20 Apr 2018 at 10:41 EDT (2,259 days ago) in Orion

308.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from Canada and Alaska. Thu, 19 Apr 2018 at 00:51 EDT (2,260 days ago) in Taurus

309.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Wed, 18 Apr 2018 at 21:09 EDT (2,261 days ago) in Taurus

310.

Uranus at solar conjunction Uranus is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Wed, 18 Apr 2018 at 09:51 EDT (2,261 days ago) in Pisces

311.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Tue, 17 Apr 2018 at 21:48 EDT (2,262 days ago) in Sagittarius

312.

Messier 3 is well placed The globular cluster M3 (NGC 5272; mag 6.3) in Canes Venatici culminates at around midnight local time. Tue, 17 Apr 2018 (2,262 days ago) in Canes Venatici

313.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 5°24'. Tue, 17 Apr 2018 at 15:27 EDT (2,262 days ago) in Aries

314.

Messier 83 is well placed The Southern Pinwheel Galaxy M83 (NGC 5236; mag 7.2), a face-on spiral galaxy in Hydra culminates at around midnight local time. Mon, 16 Apr 2018 (2,263 days ago) in Hydra

315.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 15 Apr 2018 at 21:58 EDT (2,264 days ago) in Pisces

316.

136108 Haumea at opposition 136108 Haumea lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Sat, 14 Apr 2018 at 20:42 EDT (2,265 days ago) in Bootes

317.

The Whirlpool Galaxy is well placed The Whirlpool Galaxy M51 (NGC 5194; mag 8.4) in Canes Venatici culminates at around midnight local time. Sat, 14 Apr 2018 (2,265 days ago) in Canes Venatici

318.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 3°54'. Sat, 14 Apr 2018 at 05:24 EDT (2,265 days ago) in Pisces

319.

Omega Centauri is well placed The brightest globular cluster in the sky, Omega Centauri (mag 3.6) culminates at around midnight local time. Fri, 13 Apr 2018 (2,266 days ago) in Centaurus

320.

Centaurus A is well placed Centaurus A (NGC 5128; mag 7.0) culminates at around midnight local time. Fri, 13 Apr 2018 (2,266 days ago) in Centaurus