681.

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. Sun, 07 Jul 1991 at 20:19 EDT (12,063 days ago) in Sagittarius

682.

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, 04 Jul 1991 at 02:55 EDT (12,066 days ago) in Sagittarius

683.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Sat, 08 Jun 1991 at 21:18 EDT (12,092 days ago) in Cancer

684.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Thu, 16 May 1991 at 23:24 EDT (12,115 days ago) in Capricornus

685.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Thu, 18 Apr 1991 at 18:37 EDT (12,143 days ago) in Sagittarius

686.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Thu, 18 Apr 1991 at 05:35 EDT (12,143 days ago) in Sagittarius

687.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Sat, 30 Mar 1991 at 07:58 EDT (12,162 days ago) in Cancer

688.

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. Mon, 28 Jan 1991 at 19:18 EDT (12,223 days ago) in Cancer

689.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Mon, 28 Jan 1991 at 03:00 EDT (12,223 days ago) in Cancer

690.

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. Fri, 18 Jan 1991 at 02:35 EDT (12,233 days ago) in Sagittarius

691.

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. Fri, 04 Jan 1991 at 22:13 EDT (12,247 days ago) in Sagittarius

692.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Tue, 01 Jan 1991 at 07:55 EDT (12,250 days ago) in Taurus

693.

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, 31 Dec 1990 at 10:42 EDT (12,251 days ago) in Sagittarius

694.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Thu, 29 Nov 1990 at 23:57 EDT (12,282 days ago) in Cancer

695.

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. Tue, 27 Nov 1990 at 15:27 EDT (12,285 days ago) in Taurus

696.

Mars at perigee Mars reaches its closest point to the Earth – marking the best time to observe it in 1970. Mon, 19 Nov 1990 at 22:53 EDT (12,293 days ago) in Taurus

697.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Sat, 20 Oct 1990 at 15:29 EDT (12,323 days ago) in Taurus

698.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Sun, 23 Sep 1990 at 14:29 EDT (12,350 days ago) in Sagittarius

699.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Sun, 23 Sep 1990 at 01:02 EDT (12,350 days ago) in Sagittarius

700.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Fri, 14 Sep 1990 at 14:41 EDT (12,359 days ago) in Sagittarius