401.

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 (8,454 days ago) in Taurus

402.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Fri, 11 May 2001 at 12:05 EDT (8,468 days ago) in Sagittarius

403.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Thu, 10 May 2001 at 20:03 EDT (8,469 days ago) in Capricornus

404.

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 (8,559 days ago) in Capricornus

405.

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 (8,574 days ago) in Capricornus

406.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Thu, 25 Jan 2001 at 03:39 EDT (8,574 days ago) in Taurus

407.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Wed, 24 Jan 2001 at 19:29 EDT (8,575 days ago) in Taurus

408.

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 (8,633 days ago) in Taurus

409.

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 (8,634 days ago) in Taurus

410.

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 (8,641 days ago) in Taurus

411.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Thu, 02 Nov 2000 at 16:21 EDT (8,658 days ago) in Virgo

412.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Thu, 26 Oct 2000 at 10:37 EDT (8,665 days ago) in Capricornus

413.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Sun, 15 Oct 2000 at 09:51 EDT (8,676 days ago) in Capricornus

414.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Fri, 29 Sep 2000 at 09:06 EDT (8,692 days ago) in Taurus

415.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Tue, 12 Sep 2000 at 07:56 EDT (8,709 days ago) in Taurus

416.

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 (8,741 days ago) in Capricornus

417.

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 (8,756 days ago) in Capricornus

418.

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 (8,762 days ago) in Gemini

419.

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 (8,782 days ago) in Gemini

420.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Thu, 25 May 2000 at 04:19 EDT (8,819 days ago) in Capricornus