161.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Thu, 27 Oct 2011 at 14:41 EDT (4,588 days ago) in Aries

162.

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, 13 Oct 2011 at 17:03 EDT (4,602 days ago) in Virgo

163.

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. Sun, 25 Sep 2011 at 20:06 EDT (4,620 days ago) in Pisces

164.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Tue, 30 Aug 2011 at 05:34 EDT (4,646 days ago) in Aries

165.

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, 22 Aug 2011 at 19:17 EDT (4,654 days ago) in Aquarius

166.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Sat, 09 Jul 2011 at 20:12 EDT (4,698 days ago) in Pisces

167.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Mon, 13 Jun 2011 at 00:09 EDT (4,724 days ago) in Virgo

168.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Fri, 03 Jun 2011 at 01:50 EDT (4,734 days ago) in Aquarius

169.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Thu, 07 Apr 2011 at 21:39 EDT (4,791 days ago) in Pisces

170.

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. Wed, 06 Apr 2011 at 10:29 EDT (4,792 days ago) in Pisces

171.

Saturn at opposition Saturn 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. Sun, 03 Apr 2011 at 19:48 EDT (4,795 days ago) in Virgo

172.

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. Mon, 21 Mar 2011 at 08:15 EDT (4,808 days ago) in Pisces

173.

Jupiter at perihelion Jupiter passes its orbit's closest point to the Sun. Tue, 15 Mar 2011 at 10:04 EDT (4,814 days ago) in Pisces

174.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Wed, 09 Mar 2011 at 08:25 EDT (4,820 days ago) in Aquarius

175.

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. Thu, 17 Feb 2011 at 04:47 EDT (4,840 days ago) in Aquarius

176.

Mars at solar conjunction Mars is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Fri, 04 Feb 2011 at 11:03 EDT (4,853 days ago) in Capricornus

177.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Wed, 26 Jan 2011 at 01:10 EDT (4,862 days ago) in Virgo

178.

Mars at apogee Mars reaches its furthest point from the Earth, as it passes around the far side of the Sun. Fri, 07 Jan 2011 at 17:20 EDT (4,881 days ago) in Sagittarius

179.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Sun, 05 Dec 2010 at 22:01 EDT (4,914 days ago) in Pisces

180.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Thu, 18 Nov 2010 at 11:47 EDT (4,931 days ago) in Aquarius