161.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Tue, 17 Apr 2018 at 21:48 EDT (2,203 days ago) in Sagittarius

162.

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 (2,202 days ago) in Pisces

163.

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 (2,202 days ago) in Taurus

164.

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 (2,201 days ago) in Taurus

165.

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 (2,200 days ago) in Orion

166.

Lyrid meteor shower 2018 The Lyrid meteor shower reaches its peak. Sun, 22 Apr 2018 (2,198 days ago) in Hercules

167.

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 (2,198 days ago) in Cancer

168.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Mon, 23 Apr 2018 at 06:51 EDT (2,197 days ago) in Cetus

169.

π-Puppid meteor shower 2018 The π-Puppid meteor shower reaches its peak. Mon, 23 Apr 2018 (2,197 days ago) in Puppis

170.

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 (2,197 days ago) in Ursa Major

171.

1 Ceres at perihelion 1 Ceres passes its orbit's closest point to the Sun. Tue, 24 Apr 2018 at 11:42 EDT (2,196 days ago) in Cancer

172.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from Russia and Kazakhstan. Tue, 24 Apr 2018 at 16:38 EDT (2,196 days ago) in Leo

173.

Conjunction of Mars and Pluto Mars and Pluto share the same right ascension, at a separation of 1°26'. Thu, 26 Apr 2018 at 09:52 EDT (2,194 days ago) in Sagittarius

174.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sun, 29 Apr 2018 at 11:15 EDT (2,191 days ago) in Cetus

175.

Full Moon The Moon reaches full phase and is visible for much of the night. Sun, 29 Apr 2018 at 20:58 EDT (2,191 days ago) in Libra

176.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Mon, 30 Apr 2018 (2,190 days ago) in Cetus

177.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°49'. Mon, 30 Apr 2018 at 13:14 EDT (2,190 days ago) in Libra

178.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Mon, 30 Apr 2018 at 15:16 EDT (2,190 days ago) in Libra

179.

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. Wed, 02 May 2018 at 13:53 EDT (2,188 days ago) in Ophiuchus

180.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Thu, 03 May 2018 at 12:44 EDT (2,187 days ago) in Pisces