3421.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Sun, 14 Dec 2031 at 19:26 EDT (2,719 days away) in Sagittarius

3422.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°50'. Mon, 15 Dec 2031 at 03:29 EDT (2,720 days away) in Sagittarius

3423.

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, 15 Dec 2031 at 16:25 EDT (2,720 days away) in Sagittarius

3424.

The Running Man cluster is well placed The Running Man cluster NGC 1977 (mag 4.2) in Orion's sword culminates at around midnight local time. Mon, 15 Dec 2031 (2,720 days away) in Orion

3425.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Mon, 15 Dec 2031 (2,720 days away) in Orion

3426.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Tue, 16 Dec 2031 (2,721 days away) in Scorpius

3427.

Comae Berenicid meteor shower 2031 The Comae Berenicid meteor shower reaches its peak. Tue, 16 Dec 2031 (2,721 days away) in Leo

3428.

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. Wed, 17 Dec 2031 at 04:19 EDT (2,722 days away) in Taurus

3429.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 6°43'. Thu, 18 Dec 2031 at 07:03 EDT (2,723 days away) in Capricornus

3430.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Thu, 18 Dec 2031 at 09:36 EDT (2,723 days away) in Scorpius

3431.

December Leonis Minorid meteor shower 2031 The December Leonis Minorid meteor shower reaches its peak. Sat, 20 Dec 2031 (2,725 days away) in Leo Minor

3432.

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. Sat, 20 Dec 2031 at 19:00 EDT (2,725 days away) in Pisces

3433.

December solstice 22 December will be the shortest day of 2031 in the northern hemisphere. Sun, 21 Dec 2031 at 21:00 EDT (2,726 days away) in Sagittarius

3434.

Ursid meteor shower 2031 The Ursid meteor shower reaches its peak. Tue, 23 Dec 2031 (2,728 days away) in Ursa Minor

3435.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 24 Dec 2031 at 03:08 EDT (2,729 days away) in Pisces

3436.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 1°01'. Fri, 26 Dec 2031 at 23:41 EDT (2,732 days away) in Taurus

3437.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 26 Dec 2031 at 23:42 EDT (2,732 days away) in Taurus

3438.

Lunar occultation of Saturn The Moon will pass in front of Saturn, creating a lunar occultation visible from Argentina, Chile and Falkland Islands. Fri, 26 Dec 2031 at 23:42 EDT (2,732 days away) in Taurus

3439.

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. Sun, 28 Dec 2031 at 06:40 EDT (2,733 days away) in Orion

3440.

Full Moon The Moon reaches full phase and is visible for much of the night. Sun, 28 Dec 2031 at 12:32 EDT (2,733 days away) in Gemini