841.

December φ-Cassiopeid meteor shower 2025 The December φ-Cassiopeid meteor shower reaches its peak. Sat, 06 Dec 2025 (508 days away) in Andromeda

842.

Puppid-Velid meteor shower 2025 The Puppid-Velid meteor shower reaches its peak. Sun, 07 Dec 2025 (509 days away) in Vela

843.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°42'. Sun, 07 Dec 2025 at 10:47 EDT (509 days away) in Gemini

844.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Sun, 07 Dec 2025 at 12:10 EDT (509 days away) in Gemini

845.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sun, 07 Dec 2025 at 19:14 EDT (509 days away) in Libra

846.

Asteroid 16 Psyche at opposition Asteroid 16 Psyche makes closest approach to the Earth. Sun, 07 Dec 2025 at 21:22 EDT (509 days away) in Taurus

847.

Monocerotid meteor shower 2025 The Monocerotid meteor shower reaches its peak. Mon, 08 Dec 2025 (511 days away) in Monoceros

848.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including Canada, Greenland, Svalbard and Iceland amongst others. Wed, 10 Dec 2025 at 02:47 EDT (512 days away) in Leo

849.

Neptune ends retrograde motion Neptune returns to its usual eastward motion after opposition. Wed, 10 Dec 2025 at 07:13 EDT (512 days away) in Pisces

850.

Moon at Last Quarter The Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise. Thu, 11 Dec 2025 at 15:52 EDT (513 days away) in Leo

851.

σ-Hydrid meteor shower 2025 The σ-Hydrid meteor shower reaches its peak. Thu, 11 Dec 2025 (514 days away) in Hydra

852.

The Large Magellanic Cloud is well placed The Milky Way's dwarf companion, the Large Magellanic Cloud (LMC; mag 0.9), in Dorado culminates at around midnight local time. Fri, 12 Dec 2025 (514 days away) in Dorado

853.

Geminid meteor shower 2025 The Geminid meteor shower reaches its peak. Sun, 14 Dec 2025 (516 days away) in Gemini

854.

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 2025 (517 days away) in Orion

855.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Mon, 15 Dec 2025 (517 days away) in Orion

856.

Comae Berenicid meteor shower 2025 The Comae Berenicid meteor shower reaches its peak. Mon, 15 Dec 2025 (518 days away) in Leo

857.

The Moon at apogee The Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month. Wed, 17 Dec 2025 at 01:08 EDT (519 days away) in Libra

858.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 6°09'. Thu, 18 Dec 2025 at 07:14 EDT (520 days away) in Ophiuchus

859.

Comet 240P/NEAT passes perihelion Comet 240P/NEAT makes its closest approach to the Sun. Fri, 19 Dec 2025 (521 days away) in Aries

860.

December Leonis Minorid meteor shower 2025 The December Leonis Minorid meteor shower reaches its peak. Fri, 19 Dec 2025 (522 days away) in Leo Minor