421.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Sun, 17 Apr 2039 at 10:47 EDT (5,358 days away) in Leo

422.

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, 21 Apr 2039 at 02:43 EDT (5,362 days away) in Pisces

423.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Tue, 24 May 2039 at 23:28 EDT (5,395 days away) in Leo

424.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Thu, 26 May 2039 at 07:03 EDT (5,397 days away) in Pisces

425.

Saturn ring plane crossing Saturn's seasons are changing, making its rings appear edge-on from the Earth. Sat, 09 Jul 2039 at 10:05 EDT (5,441 days away) in Virgo

426.

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. Thu, 21 Jul 2039 at 19:01 EDT (5,453 days away) in Cancer

427.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Sat, 06 Aug 2039 at 12:56 EDT (5,469 days away) in Aries

428.

Jupiter at apogee Jupiter reaches its furthest point from the Earth, as it passes around the far side of the Sun. Sun, 04 Sep 2039 at 08:50 EDT (5,498 days away) in Leo

429.

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. Sun, 04 Sep 2039 at 13:52 EDT (5,498 days away) in Leo

430.

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. Sun, 25 Sep 2039 at 11:58 EDT (5,519 days away) in Virgo

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. Tue, 25 Oct 2039 at 14:15 EDT (5,549 days away) in Pisces

432.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Tue, 08 Nov 2039 at 15:55 EDT (5,563 days away) in Cancer

433.

Mars enters retrograde motion Mars reverses its direction of motion across the sky. Wed, 23 Nov 2039 at 15:48 EDT (5,578 days away) in Gemini

434.

Mars at perigee Mars reaches its closest point to the Earth – marking the best time to observe it in 1970. Wed, 28 Dec 2039 at 09:40 EDT (5,613 days away) in Gemini

435.

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. Mon, 02 Jan 2040 at 10:21 EDT (5,618 days away) in Gemini

436.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 11 Jan 2040 at 01:52 EDT (5,627 days away) in Pisces

437.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Mon, 16 Jan 2040 at 08:17 EDT (5,632 days away) in Virgo

438.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Fri, 20 Jan 2040 at 23:20 EDT (5,637 days away) in Virgo

439.

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, 21 Jan 2040 at 14:38 EDT (5,637 days away) in Cancer

440.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Thu, 09 Feb 2040 at 06:52 EDT (5,656 days away) in Gemini