421.

Geminid meteor shower 2031 The Geminid meteor shower reaches its peak. Sun, 14 Dec 2031 (2,707 days away) in Gemini

422.

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 (2,707 days away) in Sagittarius

423.

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 (2,708 days away) in Sagittarius

424.

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 (2,708 days away) in Sagittarius

425.

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 (2,708 days away) in Orion

426.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Mon, 15 Dec 2031 (2,708 days away) in Orion

427.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Tue, 16 Dec 2031 (2,709 days away) in Scorpius

428.

Comae Berenicid meteor shower 2031 The Comae Berenicid meteor shower reaches its peak. Tue, 16 Dec 2031 (2,709 days away) in Leo

429.

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 (2,710 days away) in Taurus

430.

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 (2,711 days away) in Capricornus

431.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Thu, 18 Dec 2031 at 09:36 EDT (2,711 days away) in Scorpius

432.

December Leonis Minorid meteor shower 2031 The December Leonis Minorid meteor shower reaches its peak. Sat, 20 Dec 2031 (2,713 days away) in Leo Minor

433.

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 (2,713 days away) in Pisces

434.

December solstice 22 December will be the shortest day of 2031 in the northern hemisphere. Sun, 21 Dec 2031 at 21:00 EDT (2,714 days away) in Sagittarius

435.

Ursid meteor shower 2031 The Ursid meteor shower reaches its peak. Tue, 23 Dec 2031 (2,716 days away) in Ursa Minor

436.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 24 Dec 2031 at 03:08 EDT (2,717 days away) in Pisces

437.

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 (2,720 days away) in Taurus

438.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 26 Dec 2031 at 23:42 EDT (2,720 days away) in Taurus

439.

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 (2,720 days away) in Taurus

440.

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 (2,721 days away) in Orion