1.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Sat, 07 Oct 2017 at 19:43 EDT (2,386 days ago) in Leo

2.

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, 05 Sep 2017 at 01:19 EDT (2,418 days ago) in Aquarius

3.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Fri, 25 Aug 2017 at 07:39 EDT (2,429 days ago) in Ophiuchus

4.

Mars at apogee Mars reaches its furthest point from the Earth, as it passes around the far side of the Sun. Sat, 05 Aug 2017 at 06:39 EDT (2,449 days ago) in Cancer

5.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Thu, 03 Aug 2017 at 01:08 EDT (2,451 days ago) in Pisces

6.

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. Wed, 26 Jul 2017 at 20:30 EDT (2,459 days ago) in Cancer

7.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Fri, 16 Jun 2017 at 07:41 EDT (2,499 days ago) in Aquarius

8.

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. Thu, 15 Jun 2017 at 06:09 EDT (2,500 days ago) in Ophiuchus

9.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Fri, 09 Jun 2017 at 10:12 EDT (2,506 days ago) in Virgo

10.

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, 14 Apr 2017 at 01:21 EDT (2,562 days ago) in Pisces

11.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Sat, 08 Apr 2017 at 17:23 EDT (2,568 days ago) in Virgo

12.

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. Fri, 07 Apr 2017 at 17:31 EDT (2,569 days ago) in Virgo

13.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Thu, 06 Apr 2017 at 01:18 EDT (2,570 days ago) in Sagittarius

14.

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. Wed, 01 Mar 2017 at 21:35 EDT (2,606 days ago) in Aquarius

15.

Jupiter at aphelion Jupiter passes the furthest point along its orbit from the Sun. Thu, 16 Feb 2017 at 05:07 EDT (2,619 days ago) in Virgo

16.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Mon, 06 Feb 2017 at 01:42 EDT (2,629 days ago) in Virgo

17.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Thu, 29 Dec 2016 at 05:14 EDT (2,668 days ago) in Pisces

18.

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. Sat, 10 Dec 2016 at 06:41 EDT (2,687 days ago) in Ophiuchus

19.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Sat, 19 Nov 2016 at 23:51 EDT (2,707 days ago) in Aquarius

20.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Sat, 29 Oct 2016 at 10:10 EDT (2,729 days ago) in Sagittarius