161.

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, 17 Mar 2010 at 02:40 EDT (5,160 days ago) in Pisces

162.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Wed, 10 Mar 2010 at 12:08 EDT (5,167 days ago) in Cancer

163.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Sun, 28 Feb 2010 at 08:55 EDT (5,177 days ago) in Aquarius

164.

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. Sun, 28 Feb 2010 at 05:33 EDT (5,177 days ago) in Aquarius

165.

Neptune at solar conjunction Neptune is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sun, 14 Feb 2010 at 18:10 EDT (5,191 days ago) in Capricornus

166.

Mars at opposition Mars lies in the opposite direction to the Sun in the sky, making it closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Fri, 29 Jan 2010 at 14:37 EDT (5,207 days ago) in Cancer

167.

Mars at perigee Mars reaches its closest point to the Earth – marking the best time to observe it in 1970. Wed, 27 Jan 2010 at 13:55 EDT (5,209 days ago) in Cancer

168.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Wed, 13 Jan 2010 at 10:29 EDT (5,223 days ago) in Virgo

169.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Sun, 20 Dec 2009 at 08:25 EDT (5,247 days ago) in Leo

170.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Tue, 01 Dec 2009 at 16:36 EDT (5,266 days ago) in Aquarius

171.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 04 Nov 2009 at 14:31 EDT (5,293 days ago) in Capricornus

172.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Tue, 13 Oct 2009 at 00:31 EDT (5,315 days ago) in Capricornus

173.

Saturn at solar conjunction Saturn 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, 17 Sep 2009 at 14:12 EDT (5,341 days ago) in Virgo

174.

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, 17 Sep 2009 at 05:33 EDT (5,341 days ago) in Pisces

175.

Saturn ring plane crossing Saturn's seasons are changing, making its rings appear edge-on from the Earth. Fri, 04 Sep 2009 at 07:40 EDT (5,354 days ago) in Virgo

176.

Neptune at opposition Neptune lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Mon, 17 Aug 2009 at 16:46 EDT (5,372 days ago) in Capricornus

177.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Fri, 14 Aug 2009 at 23:13 EDT (5,375 days ago) in Capricornus

178.

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. Fri, 14 Aug 2009 at 13:45 EDT (5,375 days ago) in Capricornus

179.

Equinox on Saturn Saturn's seasons are changing, making its rings appear edge-on from the Earth. Mon, 10 Aug 2009 at 14:00 EDT (5,379 days ago) in Leo

180.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Wed, 01 Jul 2009 at 03:34 EDT (5,419 days ago) in Pisces