421.

December Leonis Minorid meteor shower 2020 The December Leonis Minorid meteor shower reaches its peak. Sat, 19 Dec 2020 (1,305 days ago) in Leo Minor

422.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Sat, 19 Dec 2020 at 22:40 EDT (1,305 days ago) in Sagittarius

423.

December solstice 21 December will be the shortest day of 2020 in the northern hemisphere. Mon, 21 Dec 2020 at 04:55 EDT (1,303 days ago) in Sagittarius

424.

Conjunction of Jupiter and Saturn Jupiter and Saturn share the same right ascension, at a separation of 6'15". Mon, 21 Dec 2020 at 08:34 EDT (1,303 days ago) in Capricornus

425.

Great conjunction of Jupiter and Saturn Jupiter and Saturn will make their closest approach since the year 1623. Mon, 21 Dec 2020 at 13:20 EDT (1,303 days ago) in Capricornus

426.

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. Mon, 21 Dec 2020 at 18:41 EDT (1,303 days ago) in Pisces

427.

Ursid meteor shower 2020 The Ursid meteor shower reaches its peak. Tue, 22 Dec 2020 (1,302 days ago) in Ursa Minor

428.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 5°34'. Wed, 23 Dec 2020 at 13:31 EDT (1,301 days ago) in Pisces

429.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Wed, 23 Dec 2020 at 18:23 EDT (1,301 days ago) in Pisces

430.

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. Thu, 24 Dec 2020 at 11:31 EDT (1,300 days ago) in Pisces

431.

Comet 398P/Boattini passes perihelion Comet 398P/Boattini makes its closest approach to the Sun. Sun, 27 Dec 2020 (1,297 days ago) in Perseus

432.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Mon, 28 Dec 2020 (1,296 days ago) in Monoceros

433.

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. Tue, 29 Dec 2020 at 11:34 EDT (1,295 days ago) in Gemini

434.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Tue, 29 Dec 2020 (1,295 days ago) in Monoceros

435.

Full Moon The Moon reaches full phase and is visible for much of the night. Tue, 29 Dec 2020 at 22:28 EDT (1,295 days ago) in Gemini

436.

The cluster Messier 41 is well placed The open star cluster M41 (NGC 2287; mag 4.5) in Canis Major culminates at around midnight local time. Fri, 01 Jan 2021 (1,292 days ago) in Canis Major

437.

The Earth at perihelion The Earth reaches its closest point to the Sun. Sat, 02 Jan 2021 at 08:50 EDT (1,291 days ago) in Pisces

438.

Quadrantid meteor shower 2021 The Quadrantid meteor shower reaches its peak. Sun, 03 Jan 2021 (1,290 days ago) in Bootes

439.

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. Wed, 06 Jan 2021 at 04:37 EDT (1,287 days ago) in Virgo

440.

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. Sat, 09 Jan 2021 at 10:36 EDT (1,284 days ago) in Scorpius