4001.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Thu, 31 Dec 2015 at 12:04 EDT (3,109 days ago) in Leo

4002.

Mercury at greatest elongation east Mercury is bright and well placed in the evening sky. Tue, 29 Dec 2015 at 01:09 EDT (3,111 days ago) in Sagittarius

4003.

Supernova ASASSN-15us discovered A new supernova has been discovered in NGC 7213. Mon, 28 Dec 2015 (3,111 days ago)

4004.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Fri, 25 Dec 2015 at 23:48 EDT (3,114 days ago) in Pisces

4005.

Asteroid 27 Euterpe at opposition Asteroid 27 Euterpe makes closest approach to the Earth. Fri, 25 Dec 2015 at 18:58 EDT (3,115 days ago) in Gemini

4006.

Full Moon The Moon reaches full phase and is visible for much of the night. Fri, 25 Dec 2015 at 06:11 EDT (3,115 days ago) in Orion

4007.

The Moon at aphelion The Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon. Fri, 25 Dec 2015 at 01:12 EDT (3,115 days ago) in Orion

4008.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from Africa, Asia, Europe, Greenland, Russia, Corsica, Guernsey, Svalbard, the Portuguese Azores, Madeira, the Savage Islands, Menorca, Mallorca, Ibiza, Isla de Alborán, Melilla, Islas Chafarinas, the Canary Islands, Shetland, Orkney and Northern Ireland. Wed, 23 Dec 2015 at 14:23 EDT (3,117 days ago) in Taurus

4009.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Wed, 23 Dec 2015 at 10:40 EDT (3,117 days ago) in Taurus

4010.

Ursid meteor shower 2015 The Ursid meteor shower reaches its peak. Tue, 22 Dec 2015 (3,117 days ago) in Ursa Minor

4011.

December solstice 22 December will be the shortest day of 2015 in the northern hemisphere. Mon, 21 Dec 2015 at 23:47 EDT (3,118 days ago) in Sagittarius

4012.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month. Mon, 21 Dec 2015 at 04:00 EDT (3,119 days ago) in Cetus

4013.

December Leonis Minorid meteor shower 2015 The December Leonis Minorid meteor shower reaches its peak. Sun, 20 Dec 2015 (3,120 days ago) in Leo Minor

4014.

Lunar occultation of Uranus The Moon will pass in front of Uranus creating a lunar occultation, though it will open be visible only at sea. Sat, 19 Dec 2015 at 20:25 EDT (3,121 days ago) in Pisces

4015.

Close approach of the Moon and Uranus The Moon and Uranus pass close to each other. Sat, 19 Dec 2015 at 20:25 EDT (3,121 days ago) in Pisces

4016.

Conjunction of Mercury and Pluto Mercury and Pluto share the same right ascension, at a separation of 3°50'. Sat, 19 Dec 2015 at 11:08 EDT (3,121 days ago) in Sagittarius

4017.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight. Fri, 18 Dec 2015 at 10:14 EDT (3,122 days ago) in Pisces

4018.

Comae Berenicid meteor shower 2015 The Comae Berenicid meteor shower reaches its peak. Wed, 16 Dec 2015 (3,124 days ago) in Leo

4019.

Supernova AT2015dd discovered A new supernova has been discovered in NGC 5483. Mon, 14 Dec 2015 (3,125 days ago)

4020.

Geminid meteor shower 2015 The Geminid meteor shower reaches its peak. Mon, 14 Dec 2015 (3,126 days ago) in Gemini