621.

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. Wed, 27 Dec 1989 at 09:08 EDT (12,621 days ago) in Gemini

622.

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, 27 Dec 1989 at 01:03 EDT (12,621 days ago) in Sagittarius

623.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Tue, 26 Dec 1989 at 03:31 EDT (12,622 days ago) in Gemini

624.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Sat, 28 Oct 1989 at 20:11 EDT (12,681 days ago) in Gemini

625.

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, 29 Sep 1989 at 14:35 EDT (12,710 days ago) in Virgo

626.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Thu, 21 Sep 1989 at 04:07 EDT (12,718 days ago) in Sagittarius

627.

Mars at apogee Mars reaches its furthest point from the Earth, as it passes around the far side of the Sun. Thu, 14 Sep 1989 at 17:00 EDT (12,725 days ago) in Virgo

628.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Mon, 11 Sep 1989 at 03:23 EDT (12,728 days ago) in Sagittarius

629.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Sat, 09 Sep 1989 at 21:51 EDT (12,730 days ago) in Sagittarius

630.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Fri, 21 Jul 1989 at 22:28 EDT (12,780 days ago) in Leo

631.

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, 02 Jul 1989 at 18:34 EDT (12,799 days ago) in Sagittarius

632.

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, 02 Jul 1989 at 09:00 EDT (12,799 days ago) in Sagittarius

633.

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. Sat, 24 Jun 1989 at 17:52 EDT (12,807 days ago) in Sagittarius

634.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Sun, 11 Jun 1989 at 09:48 EDT (12,820 days ago) in Taurus

635.

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. Fri, 09 Jun 1989 at 04:58 EDT (12,822 days ago) in Taurus

636.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Sat, 22 Apr 1989 at 19:32 EDT (12,870 days ago) in Sagittarius

637.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Thu, 13 Apr 1989 at 19:32 EDT (12,879 days ago) in Sagittarius

638.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Sun, 09 Apr 1989 at 04:13 EDT (12,883 days ago) in Sagittarius

639.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Fri, 20 Jan 1989 at 01:28 EDT (12,962 days ago) in Taurus

640.

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. Sat, 31 Dec 1988 at 03:30 EDT (12,982 days ago) in Sagittarius