501.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Tue, 29 May 2001 at 11:20 EDT (8,433 days ago) in Capricornus

502.

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, 25 May 2001 at 08:23 EDT (8,437 days ago) in Taurus

503.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Fri, 11 May 2001 at 12:05 EDT (8,451 days ago) in Sagittarius

504.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Thu, 10 May 2001 at 20:03 EDT (8,452 days ago) in Capricornus

505.

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. Fri, 09 Feb 2001 at 07:10 EDT (8,542 days ago) in Capricornus

506.

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, 25 Jan 2001 at 22:46 EDT (8,557 days ago) in Capricornus

507.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Thu, 25 Jan 2001 at 03:39 EDT (8,557 days ago) in Taurus

508.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Wed, 24 Jan 2001 at 19:29 EDT (8,558 days ago) in Taurus

509.

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, 27 Nov 2000 at 21:05 EDT (8,616 days ago) in Taurus

510.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Sun, 26 Nov 2000 at 10:06 EDT (8,617 days ago) in Taurus

511.

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, 19 Nov 2000 at 07:33 EDT (8,624 days ago) in Taurus

512.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Thu, 02 Nov 2000 at 16:21 EDT (8,641 days ago) in Virgo

513.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Thu, 26 Oct 2000 at 10:37 EDT (8,648 days ago) in Capricornus

514.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Sun, 15 Oct 2000 at 09:51 EDT (8,659 days ago) in Capricornus

515.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Fri, 29 Sep 2000 at 09:06 EDT (8,675 days ago) in Taurus

516.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Tue, 12 Sep 2000 at 07:56 EDT (8,692 days ago) in Taurus

517.

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. Fri, 11 Aug 2000 at 01:11 EDT (8,724 days ago) in Capricornus

518.

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. Thu, 27 Jul 2000 at 18:40 EDT (8,739 days ago) in Capricornus

519.

Mars at apogee Mars reaches its furthest point from the Earth, as it passes around the far side of the Sun. Fri, 21 Jul 2000 at 01:13 EDT (8,745 days ago) in Gemini

520.

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. Sat, 01 Jul 2000 at 11:22 EDT (8,765 days ago) in Gemini