421.

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. Mon, 28 Jan 2002 at 08:36 EDT (8,145 days ago) in Capricornus

422.

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. Tue, 01 Jan 2002 at 00:45 EDT (8,172 days ago) in Gemini

423.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Sun, 30 Dec 2001 at 20:04 EDT (8,174 days ago) in Gemini

424.

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. Mon, 03 Dec 2001 at 09:05 EDT (8,201 days ago) in Taurus

425.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Fri, 02 Nov 2001 at 10:32 EDT (8,232 days ago) in Gemini

426.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Tue, 30 Oct 2001 at 17:07 EDT (8,235 days ago) in Capricornus

427.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 17 Oct 2001 at 21:13 EDT (8,248 days ago) in Capricornus

428.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Fri, 12 Oct 2001 at 04:14 EDT (8,253 days ago) in Sagittarius

429.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Wed, 26 Sep 2001 at 20:05 EDT (8,269 days ago) in Taurus

430.

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. Wed, 15 Aug 2001 at 11:16 EDT (8,311 days ago) in Capricornus

431.

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, 30 Jul 2001 at 07:39 EDT (8,327 days ago) in Capricornus

432.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Thu, 19 Jul 2001 at 18:49 EDT (8,338 days ago) in Ophiuchus

433.

Mars at perigee Mars reaches its closest point to the Earth – marking the best time to observe it in 1970. Thu, 21 Jun 2001 at 18:50 EDT (8,366 days ago) in Ophiuchus

434.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Sat, 16 Jun 2001 at 14:09 EDT (8,371 days ago) in Taurus

435.

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. Thu, 14 Jun 2001 at 08:26 EDT (8,373 days ago) in Taurus

436.

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. Wed, 13 Jun 2001 at 13:39 EDT (8,374 days ago) in Ophiuchus

437.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Tue, 29 May 2001 at 11:20 EDT (8,389 days ago) in Capricornus

438.

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 (8,393 days ago) in Taurus

439.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Fri, 11 May 2001 at 12:05 EDT (8,407 days ago) in Sagittarius

440.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Thu, 10 May 2001 at 20:03 EDT (8,408 days ago) in Capricornus