1.

Mars at aphelion Mars passes the furthest point along its orbit from the Sun. Sat, 07 Oct 2017 at 19:43 EDT (2,414 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 (2,446 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 (2,457 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 (2,477 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 (2,479 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 (2,487 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 (2,527 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 (2,528 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 (2,534 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 (2,590 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 (2,596 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 (2,597 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 (2,598 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 (2,634 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 (2,647 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 (2,657 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 (2,696 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 (2,715 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 (2,735 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 (2,757 days ago) in Sagittarius