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3/22/2018 to 4/22/2018Apr 21  17:00  2018 Spring Astronomy Day - Powell Observatory

 

Look Up!

What's in the sky this month

1/1/2019 to 1/31/2019Jan 01 21:50 Venus 1.3°S of Moon
1/1/2019 to 1/31/2019Jan 02 05:00 Saturn in Conjunction with Sun
1/1/2019 to 1/31/2019Jan 03 05:00 Earth at Perihelion: 0.98330 AU
1/1/2019 to 1/31/2019Jan 03 07:37 Jupiter 3.1°S of Moon
1/1/2019 to 1/31/2019Jan 04 02:00 Quadrantid Meteor Shower
1/1/2019 to 1/31/2019Jan 06 01:28 NEW MOON
1/1/2019 to 1/31/2019Jan 06 01:41 Partial Solar Eclipse; mag=0.715
1/1/2019 to 1/31/2019Jan 06 05:00 Venus at Greatest Elong: 47.0°W
1/1/2019 to 1/31/2019Jan 07 00:08 Moon at Descending Node
1/1/2019 to 1/31/2019Jan 09 04:29 Moon at Apogee: 406116 km
1/1/2019 to 1/31/2019Jan 12 08:00 Mercury at Aphelion
1/1/2019 to 1/31/2019Jan 12 19:47 Mars 5.3°N of Moon
1/1/2019 to 1/31/2019Jan 14 06:45 FIRST QUARTER MOON
1/1/2019 to 1/31/2019Jan 17 18:20 Aldebaran 1.6°S of Moon
1/1/2019 to 1/31/2019Jan 20 22:48 Moon at Ascending Node
1/1/2019 to 1/31/2019Jan 21 05:12 Total Lunar Eclipse; mag=1.195
1/1/2019 to 1/31/2019Jan 21 05:16 FULL MOON
1/1/2019 to 1/31/2019Jan 21 15:32 Beehive 0.6°N of Moon
1/1/2019 to 1/31/2019Jan 21 19:58 Moon at Perigee: 357345 km
1/1/2019 to 1/31/2019Jan 23 01:41 Regulus 2.5°S of Moon
1/1/2019 to 1/31/2019Jan 27 21:10 LAST QUARTER MOON
1/1/2019 to 1/31/2019Jan 30 03:00 Mercury at Superior Conjunction
1/1/2019 to 1/31/2019Jan 30 23:54 Jupiter 2.8°S of Moon
1/1/2019 to 1/31/2019Jan 31 17:36 Venus 0.1°S of Moon: Occn.
2/1/2019 to 2/28/2019Feb 02 07:18 Saturn 0.6°S of Moon: Occn.
2/1/2019 to 2/28/2019Feb 03 06:35 Moon at Descending Node
2/1/2019 to 2/28/2019Feb 04 21:04 NEW MOON
2/1/2019 to 2/28/2019Feb 05 09:26 Moon at Apogee: 406556 km
2/1/2019 to 2/28/2019Feb 12 22:26 FIRST QUARTER MOON
2/1/2019 to 2/28/2019Feb 14 03:29 Aldebaran 1.7°S of Moon
2/1/2019 to 2/28/2019Feb 17 09:42 Moon at Ascending Node
2/1/2019 to 2/28/2019Feb 18 03:05 Beehive 0.6°N of Moon
2/1/2019 to 2/28/2019Feb 19 09:06 Moon at Perigee: 356762 km
2/1/2019 to 2/28/2019Feb 19 13:08 Regulus 2.5°S of Moon
2/1/2019 to 2/28/2019Feb 19 15:53 FULL MOON
2/1/2019 to 2/28/2019Feb 25 08:00 Mercury at Perihelion
2/1/2019 to 2/28/2019Feb 26 11:28 LAST QUARTER MOON
2/1/2019 to 2/28/2019Feb 27 01:00 Mercury at Greatest Elong: 18.1°E
2/1/2019 to 2/28/2019Feb 27 14:17 Jupiter 2.3°S of Moon
3/1/2019 to 3/31/2019Mar 01 18:40 Saturn 0.3°S of Moon: Occn.
3/1/2019 to 3/31/2019Mar 02 11:03 Moon at Descending Node
3/1/2019 to 3/31/2019Mar 02 21:28 Venus 1.2°N of Moon
3/1/2019 to 3/31/2019Mar 04 11:25 Moon at Apogee: 406391 km
3/1/2019 to 3/31/2019Mar 06 16:04 NEW MOON
3/1/2019 to 3/31/2019Mar 07 01:00 Neptune in Conjunction with Sun
3/1/2019 to 3/31/2019Mar 11 12:09 Mars 5.8°N of Moon
3/1/2019 to 3/31/2019Mar 13 10:13 Aldebaran 1.9°S of Moon
3/1/2019 to 3/31/2019Mar 14 10:27 FIRST QUARTER MOON
3/1/2019 to 3/31/2019Mar 15 02:00 Mercury at Inferior Conjunction
3/1/2019 to 3/31/2019Mar 16 16:22 Moon at Ascending Node
3/1/2019 to 3/31/2019Mar 17 13:01 Beehive 0.5°N of Moon
3/1/2019 to 3/31/2019Mar 18 23:59 Regulus 2.6°S of Moon
3/1/2019 to 3/31/2019Mar 19 19:47 Moon at Perigee: 359381 km
3/1/2019 to 3/31/2019Mar 20 21:58 Vernal Equinox
3/1/2019 to 3/31/2019Mar 21 01:43 FULL MOON
3/1/2019 to 3/31/2019Mar 27 02:28 Jupiter 1.9°S of Moon
3/1/2019 to 3/31/2019Mar 28 04:10 LAST QUARTER MOON
3/1/2019 to 3/31/2019Mar 29 05:11 Saturn 0.1°N of Moon: Occn.
3/1/2019 to 3/31/2019Mar 29 13:08 Moon at Descending Node
3/1/2019 to 3/31/2019Mar 31 03:06 Mars 3.1°S of Pleiades
4/1/2019 to 4/30/2019Apr 01 00:14 Moon at Apogee: 405577 km
4/1/2019 to 4/30/2019Apr 02 04:18 Venus 2.7°N of Moon
4/1/2019 to 4/30/2019Apr 02 23:01 Mercury 3.6°N of Moon
4/1/2019 to 4/30/2019Apr 05 08:50 NEW MOON
4/1/2019 to 4/30/2019Apr 09 06:40 Mars 4.7°N of Moon
4/1/2019 to 4/30/2019Apr 09 15:43 Aldebaran 2.1°S of Moon
4/1/2019 to 4/30/2019Apr 11 19:00 Mercury at Greatest Elong: 27.7°W
4/1/2019 to 4/30/2019Apr 12 18:08 Moon at Ascending Node
4/1/2019 to 4/30/2019Apr 12 19:06 FIRST QUARTER MOON
4/1/2019 to 4/30/2019Apr 13 20:12 Beehive 0.2°N of Moon
4/1/2019 to 4/30/2019Apr 15 00:24 Mars 6.4°N of Aldebaran
4/1/2019 to 4/30/2019Apr 15 08:22 Regulus 2.7°S of Moon
4/1/2019 to 4/30/2019Apr 16 20:00 Mercury 4.3° of Venus
4/1/2019 to 4/30/2019Apr 16 22:02 Moon at Perigee: 364209 km
4/1/2019 to 4/30/2019Apr 18 03:00 Venus at Aphelion
4/1/2019 to 4/30/2019Apr 19 11:12 FULL MOON
4/1/2019 to 4/30/2019Apr 23 00:00 Lyrid Meteor Shower
4/1/2019 to 4/30/2019Apr 23 00:00 Uranus in Conjunction with Sun
4/1/2019 to 4/30/2019Apr 23 11:36 Jupiter 1.6°S of Moon
4/1/2019 to 4/30/2019Apr 25 14:38 Saturn 0.4°N of Moon: Occn.
4/1/2019 to 4/30/2019Apr 25 15:02 Moon at Descending Node
4/1/2019 to 4/30/2019Apr 26 22:18 LAST QUARTER MOON
4/1/2019 to 4/30/2019Apr 28 18:20 Moon at Apogee: 404577 km
5/1/2019 to 5/31/2019May 02 11:39 Venus 3.6°N of Moon
5/1/2019 to 5/31/2019May 03 06:26 Mercury 2.9°N of Moon
5/1/2019 to 5/31/2019May 04 22:45 NEW MOON
5/1/2019 to 5/31/2019May 05 13:00 Eta-Aquarid Meteor Shower
5/1/2019 to 5/31/2019May 06 21:52 Aldebaran 2.3°S of Moon
5/1/2019 to 5/31/2019May 07 23:36 Mars 3.2°N of Moon
5/1/2019 to 5/31/2019May 09 18:50 Moon at Ascending Node
5/1/2019 to 5/31/2019May 10 03:30 Pollux 6.3°N of Moon
5/1/2019 to 5/31/2019May 11 01:35 Beehive 0.0°S of Moon
5/1/2019 to 5/31/2019May 12 01:12 FIRST QUARTER MOON
5/1/2019 to 5/31/2019May 12 14:19 Regulus 3.0°S of Moon
5/1/2019 to 5/31/2019May 13 21:53 Moon at Perigee: 369017 km
5/1/2019 to 5/31/2019May 18 21:11 FULL MOON
5/1/2019 to 5/31/2019May 20 16:54 Jupiter 1.7°S of Moon
5/1/2019 to 5/31/2019May 21 13:00 Mercury at Superior Conjunction
5/1/2019 to 5/31/2019May 22 19:12 Moon at Descending Node
5/1/2019 to 5/31/2019May 22 22:25 Saturn 0.5°N of Moon: Occn.
5/1/2019 to 5/31/2019May 24 07:00 Mercury at Perihelion
5/1/2019 to 5/31/2019May 26 13:27 Moon at Apogee: 404134 km
5/1/2019 to 5/31/2019May 26 16:33 LAST QUARTER MOON
6/1/2019 to 6/30/2019Jun 01 18:15 Venus 3.2°N of Moon
6/1/2019 to 6/30/2019Jun 03 10:02 NEW MOON
6/1/2019 to 6/30/2019Jun 04 15:42 Mercury 3.7°N of Moon
6/1/2019 to 6/30/2019Jun 05 15:05 Mars 1.6°N of Moon
6/1/2019 to 6/30/2019Jun 05 22:46 Moon at Ascending Node
6/1/2019 to 6/30/2019Jun 06 09:41 Pollux 6.2°N of Moon
6/1/2019 to 6/30/2019Jun 07 07:19 Beehive 0.2°S of Moon
6/1/2019 to 6/30/2019Jun 07 23:21 Moon at Perigee: 368508 km
6/1/2019 to 6/30/2019Jun 08 19:36 Regulus 3.2°S of Moon
6/1/2019 to 6/30/2019Jun 09 01:51 Venus 5.0°S of Pleiades
6/1/2019 to 6/30/2019Jun 10 05:59 FIRST QUARTER MOON
6/1/2019 to 6/30/2019Jun 10 15:00 Jupiter at Opposition
6/1/2019 to 6/30/2019Jun 16 18:50 Jupiter 2.0°S of Moon
6/1/2019 to 6/30/2019Jun 16 23:09 Venus 4.6°N of Aldebaran
6/1/2019 to 6/30/2019Jun 17 08:31 FULL MOON
6/1/2019 to 6/30/2019Jun 18 18:00 Mercury 0.2° of Mars
6/1/2019 to 6/30/2019Jun 19 01:49 Moon at Descending Node
6/1/2019 to 6/30/2019Jun 19 03:58 Saturn 0.4°N of Moon: Occn.
6/1/2019 to 6/30/2019Jun 19 13:04 Mercury 5.2°S of Pollux
6/1/2019 to 6/30/2019Jun 21 08:00 Mars 5.4°S of Pollux
6/1/2019 to 6/30/2019Jun 21 15:54 Summer Solstice
6/1/2019 to 6/30/2019Jun 23 07:50 Moon at Apogee: 404549 km
6/1/2019 to 6/30/2019Jun 23 23:00 Mercury at Greatest Elong: 25.2°E
6/1/2019 to 6/30/2019Jun 25 09:46 LAST QUARTER MOON
6/1/2019 to 6/30/2019Jun 30 15:06 Aldebaran 2.3°S of Moon
7/1/2019 to 7/31/2019Jul 02 19:16 NEW MOON
7/1/2019 to 7/31/2019Jul 02 19:23 Total Solar Eclipse; mag=1.046
7/1/2019 to 7/31/2019Jul 03 06:53 Moon at Ascending Node
7/1/2019 to 7/31/2019Jul 04 08:34 Mercury 3.3°S of Moon
7/1/2019 to 7/31/2019Jul 04 13:20 Mercury 2.5°S of Beehive
7/1/2019 to 7/31/2019Jul 04 15:02 Beehive 0.2°S of Moon
7/1/2019 to 7/31/2019Jul 04 23:00 Earth at Aphelion: 1.01676 AU
7/1/2019 to 7/31/2019Jul 05 04:54 Moon at Perigee: 363729 km
7/1/2019 to 7/31/2019Jul 05 23:00 Mercury 3.8° of Mars
7/1/2019 to 7/31/2019Jul 06 02:17 Regulus 3.2°S of Moon
7/1/2019 to 7/31/2019Jul 07 07:00 Mercury at Aphelion
7/1/2019 to 7/31/2019Jul 09 10:55 FIRST QUARTER MOON
7/1/2019 to 7/31/2019Jul 09 16:00 Saturn at Opposition
7/1/2019 to 7/31/2019Jul 13 07:06 Mars 0.4°S of Beehive
7/1/2019 to 7/31/2019Jul 13 19:43 Jupiter 2.3°S of Moon
7/1/2019 to 7/31/2019Jul 16 07:27 Saturn 0.2°N of Moon: Occn.
7/1/2019 to 7/31/2019Jul 16 09:05 Moon at Descending Node
7/1/2019 to 7/31/2019Jul 16 21:31 Partial Lunar Eclipse; mag=0.653
7/1/2019 to 7/31/2019Jul 16 21:38 FULL MOON
7/1/2019 to 7/31/2019Jul 21 00:01 Moon at Apogee: 405480 km
7/1/2019 to 7/31/2019Jul 21 13:00 Mercury at Inferior Conjunction
7/1/2019 to 7/31/2019Jul 25 01:18 LAST QUARTER MOON
7/1/2019 to 7/31/2019Jul 28 00:47 Aldebaran 2.3°S of Moon
7/1/2019 to 7/31/2019Jul 28 15:00 Delta-Aquarid Meteor Shower
7/1/2019 to 7/31/2019Jul 30 17:02 Moon at Ascending Node
8/1/2019 to 8/31/2019Aug 01 03:12 NEW MOON
8/1/2019 to 8/31/2019Aug 02 07:08 Moon at Perigee: 359398 km
8/1/2019 to 8/31/2019Aug 07 17:31 FIRST QUARTER MOON
8/1/2019 to 8/31/2019Aug 08 11:00 Venus at Perihelion
8/1/2019 to 8/31/2019Aug 09 22:53 Jupiter 2.5°S of Moon
8/1/2019 to 8/31/2019Aug 09 23:00 Mercury at Greatest Elong: 19.0°W
8/1/2019 to 8/31/2019Aug 12 10:05 Saturn 0.0°N of Moon: Occn.
8/1/2019 to 8/31/2019Aug 12 14:45 Moon at Descending Node
8/1/2019 to 8/31/2019Aug 12 14:59 Jupiter 4.3°N of Antares
8/1/2019 to 8/31/2019Aug 13 07:00 Perseid Meteor Shower
8/1/2019 to 8/31/2019Aug 14 06:00 Venus at Superior Conjunction
8/1/2019 to 8/31/2019Aug 15 12:29 FULL MOON
8/1/2019 to 8/31/2019Aug 17 04:24 Mercury 1.2°S of Beehive
8/1/2019 to 8/31/2019Aug 17 10:50 Moon at Apogee: 406244 km
8/1/2019 to 8/31/2019Aug 20 07:00 Mercury at Perihelion
8/1/2019 to 8/31/2019Aug 23 14:56 LAST QUARTER MOON
8/1/2019 to 8/31/2019Aug 24 09:24 Aldebaran 2.4°S of Moon
8/1/2019 to 8/31/2019Aug 26 00:00 Mars at Aphelion
8/1/2019 to 8/31/2019Aug 27 01:50 Moon at Ascending Node
8/1/2019 to 8/31/2019Aug 27 14:30 Pollux 6.1°N of Moon
8/1/2019 to 8/31/2019Aug 28 11:31 Beehive 0.2°S of Moon
8/1/2019 to 8/31/2019Aug 30 10:37 NEW MOON
8/1/2019 to 8/31/2019Aug 30 15:57 Moon at Perigee: 357177 km
9/1/2019 to 9/30/2019Sep 02 10:00 Mars in Conjunction with Sun
9/1/2019 to 9/30/2019Sep 04 01:00 Mercury at Superior Conjunction
9/1/2019 to 9/30/2019Sep 06 03:10 FIRST QUARTER MOON
9/1/2019 to 9/30/2019Sep 06 06:52 Jupiter 2.3°S of Moon
9/1/2019 to 9/30/2019Sep 08 13:53 Saturn 0.0°N of Moon: Occn.
9/1/2019 to 9/30/2019Sep 08 17:35 Moon at Descending Node
9/1/2019 to 9/30/2019Sep 10 06:00 Neptune at Opposition
9/1/2019 to 9/30/2019Sep 13 13:32 Moon at Apogee: 406378 km
9/1/2019 to 9/30/2019Sep 14 04:33 FULL MOON
9/1/2019 to 9/30/2019Sep 20 16:14 Aldebaran 2.6°S of Moon
9/1/2019 to 9/30/2019Sep 22 02:41 LAST QUARTER MOON
9/1/2019 to 9/30/2019Sep 23 06:30 Moon at Ascending Node
9/1/2019 to 9/30/2019Sep 23 07:50 Autumnal Equinox
9/1/2019 to 9/30/2019Sep 23 23:34 Pollux 5.9°N of Moon
9/1/2019 to 9/30/2019Sep 24 21:15 Beehive 0.4°S of Moon
9/1/2019 to 9/30/2019Sep 26 08:30 Regulus 3.3°S of Moon
9/1/2019 to 9/30/2019Sep 28 02:27 Moon at Perigee: 357803 km
9/1/2019 to 9/30/2019Sep 28 18:26 NEW MOON
9/1/2019 to 9/30/2019Sep 29 04:15 Mercury 1.2°N of Spica
10/1/2019 to 10/31/2019Oct 03 20:23 Jupiter 1.9°S of Moon
10/1/2019 to 10/31/2019Oct 05 16:47 FIRST QUARTER MOON
10/1/2019 to 10/31/2019Oct 05 18:49 Moon at Descending Node
10/1/2019 to 10/31/2019Oct 05 20:48 Saturn 0.3°N of Moon: Occn.
10/1/2019 to 10/31/2019Oct 10 18:29 Moon at Apogee: 405902 km
10/1/2019 to 10/31/2019Oct 13 21:08 FULL MOON
10/1/2019 to 10/31/2019Oct 17 21:51 Aldebaran 2.9°S of Moon
10/1/2019 to 10/31/2019Oct 20 04:00 Mercury at Greatest Elong: 24.6°E
10/1/2019 to 10/31/2019Oct 20 07:28 Moon at Ascending Node
10/1/2019 to 10/31/2019Oct 21 06:21 Pollux 5.7°N of Moon
10/1/2019 to 10/31/2019Oct 21 12:39 LAST QUARTER MOON
10/1/2019 to 10/31/2019Oct 21 23:00 Orionid Meteor Shower
10/1/2019 to 10/31/2019Oct 22 04:41 Beehive 0.6°S of Moon
10/1/2019 to 10/31/2019Oct 23 17:11 Regulus 3.5°S of Moon
10/1/2019 to 10/31/2019Oct 26 10:41 Moon at Perigee: 361316 km
10/1/2019 to 10/31/2019Oct 28 03:38 NEW MOON
10/1/2019 to 10/31/2019Oct 28 08:00 Uranus at Opposition
10/1/2019 to 10/31/2019Oct 29 13:34 Venus 3.9°S of Moon
10/1/2019 to 10/31/2019Oct 31 04:00 Mercury 2.5° of Venus
10/1/2019 to 10/31/2019Oct 31 14:22 Jupiter 1.3°S of Moon
11/1/2019 to 11/30/2019Nov 01 21:40 Moon at Descending Node
11/1/2019 to 11/30/2019Nov 02 07:31 Saturn 0.6°N of Moon: Occn.
11/1/2019 to 11/30/2019Nov 04 10:23 FIRST QUARTER MOON
11/1/2019 to 11/30/2019Nov 06 00:00 S Taurid Meteor Shower
11/1/2019 to 11/30/2019Nov 07 08:37 Moon at Apogee: 405060 km
11/1/2019 to 11/30/2019Nov 09 19:18 Venus 3.8°N of Antares
11/1/2019 to 11/30/2019Nov 09 23:07 Mars 2.6°N of Spica
11/1/2019 to 11/30/2019Nov 11 15:00 Mercury at Inferior Conjunction
11/1/2019 to 11/30/2019Nov 12 13:34 FULL MOON
11/1/2019 to 11/30/2019Nov 12 23:00 N Taurid Meteor Shower
11/1/2019 to 11/30/2019Nov 14 03:52 Aldebaran 3.0°S of Moon
11/1/2019 to 11/30/2019Nov 16 06:00 Mercury at Perihelion
11/1/2019 to 11/30/2019Nov 16 08:48 Moon at Ascending Node
11/1/2019 to 11/30/2019Nov 17 11:41 Pollux 5.4°N of Moon
11/1/2019 to 11/30/2019Nov 18 05:00 Leonid Meteor Shower
11/1/2019 to 11/30/2019Nov 18 10:11 Beehive 0.9°S of Moon
11/1/2019 to 11/30/2019Nov 19 21:11 LAST QUARTER MOON
11/1/2019 to 11/30/2019Nov 19 23:24 Regulus 3.7°S of Moon
11/1/2019 to 11/30/2019Nov 23 07:54 Moon at Perigee: 366721 km
11/1/2019 to 11/30/2019Nov 24 09:02 Mars 4.3°S of Moon
11/1/2019 to 11/30/2019Nov 25 02:50 Mercury 1.9°S of Moon
11/1/2019 to 11/30/2019Nov 26 15:06 NEW MOON
11/1/2019 to 11/30/2019Nov 28 10:00 Mercury at Greatest Elong: 20.1°W
11/1/2019 to 11/30/2019Nov 28 10:49 Jupiter 0.7°S of Moon: Occn.
11/1/2019 to 11/30/2019Nov 28 18:50 Venus 1.9°S of Moon
11/1/2019 to 11/30/2019Nov 29 04:13 Moon at Descending Node
11/1/2019 to 11/30/2019Nov 29 21:12 Saturn 0.9°N of Moon: Occn.
12/1/2019 to 12/31/2019Dec 04 06:58 FIRST QUARTER MOON
12/1/2019 to 12/31/2019Dec 05 04:09 Moon at Apogee: 404447 km
12/1/2019 to 12/31/2019Dec 11 11:40 Aldebaran 3.0°S of Moon
12/1/2019 to 12/31/2019Dec 12 05:12 FULL MOON
12/1/2019 to 12/31/2019Dec 13 14:15 Moon at Ascending Node
12/1/2019 to 12/31/2019Dec 14 17:51 Pollux 5.3°N of Moon
12/1/2019 to 12/31/2019Dec 14 18:00 Geminid Meteor Shower
12/1/2019 to 12/31/2019Dec 15 15:54 Beehive 1.0°S of Moon
12/1/2019 to 12/31/2019Dec 17 04:41 Regulus 3.8°S of Moon
12/1/2019 to 12/31/2019Dec 18 20:30 Moon at Perigee: 370260 km
12/1/2019 to 12/31/2019Dec 19 04:57 LAST QUARTER MOON
12/1/2019 to 12/31/2019Dec 22 04:19 Winter Solstice
12/1/2019 to 12/31/2019Dec 23 01:49 Mars 3.5°S of Moon
12/1/2019 to 12/31/2019Dec 23 03:00 Ursid Meteor Shower
12/1/2019 to 12/31/2019Dec 26 05:13 NEW MOON
12/1/2019 to 12/31/2019Dec 26 05:18 Annular Solar Eclipse; mag=0.970
12/1/2019 to 12/31/2019Dec 26 13:01 Moon at Descending Node
12/1/2019 to 12/31/2019Dec 27 18:00 Jupiter in Conjunction with Sun
12/1/2019 to 12/31/2019Dec 29 01:32 Venus 1.0°N of Moon: Occn.
12/1/2019 to 12/31/2019Dec 30 05:00 Mercury at Aphelion


Calendar of Astronomical Events Courtesy of Fred Espenak, www.AstroPixels.com

 

Astronomical Definitions

  • Perihelion - the instant when a planet is closest to the Sun
  • Aphelion - the instant when a planet is furthest from the Sun
  • Perigee - the instant when the Moon is closest to Earth
  • Apogee - the instant when the Moon is furthest from Earth
  • Inferior Conjunction - the instant when a planet passes between Earth and the Sun (Mercury or Venus)
  • Superior Conjunction - the instant when a planet passes on the opposite side of the Sun from Earth (Mercury or Venus)
  • Greatest Elongation - elongation is the apparent angle between a planet and the Sun as seen from Earth; during eastern elongation (E), the planet appears as an evening star; during western elongation (W), the planet appears as a morning star
  • Opposition - the instant when a planet appears opposite the Sun as seen from Earth
  • Conjunction - the instant when a planet appears closest the Sun as seen from Earth
  • Occultation - the Moon occults or eclipses a star or planet
  • Ascending Node - the point where a planet crosses from the southern to northern portion of its orbit
  • Descending Node - the point where a planet crosses from the northern to the southern portion of its orbit