301.

Comet 10P/Tempel passes perihelion Comet 10P/Tempel makes its closest approach to the Sun. Tue, 23 Mar 2021 (1,191 days ago) in Aquarius

302.

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. Sun, 21 Mar 2021 at 10:41 EDT (1,193 days ago) in Gemini

303.

March equinox Day and night have equal length, marking the beginning of spring in the northern hemisphere and autumn in the southern hemisphere. Sat, 20 Mar 2021 at 05:30 EDT (1,194 days ago) in Pisces

304.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 19 Mar 2021 at 14:47 EDT (1,195 days ago) in Taurus

305.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 1°55'. Fri, 19 Mar 2021 at 13:46 EDT (1,195 days ago) in Taurus

306.

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, 18 Mar 2021 at 01:02 EDT (1,196 days ago) in Aries

307.

γ-Normid meteor shower 2021 The γ-Normid meteor shower reaches its peak. Sun, 14 Mar 2021 (1,200 days ago) in Norma

308.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Sat, 13 Mar 2021 at 20:57 EDT (1,201 days ago) in Aquarius

309.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 13 Mar 2021 at 05:22 EDT (1,201 days ago) in Aquarius

310.

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. Wed, 10 Mar 2021 at 21:01 EDT (1,204 days ago) in Capricornus

311.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 3°41'. Wed, 10 Mar 2021 at 20:02 EDT (1,204 days ago) in Capricornus

312.

Neptune at solar conjunction Neptune is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Wed, 10 Mar 2021 at 18:52 EDT (1,204 days ago) in Aquarius

313.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°02'. Wed, 10 Mar 2021 at 10:37 EDT (1,204 days ago) in Capricornus

314.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Tue, 09 Mar 2021 at 19:24 EDT (1,205 days ago) in Capricornus

315.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°40'. Tue, 09 Mar 2021 at 17:58 EDT (1,205 days ago) in Capricornus

316.

The Wishing Well cluster is well placed The Wishing Well open star cluster (NGC 3532; mag 3.0) in Carina culminates at around midnight local time. Mon, 08 Mar 2021 (1,206 days ago) in Carina

317.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from Kazakhstan. Sun, 07 Mar 2021 at 19:49 EDT (1,207 days ago) in Sagittarius

318.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sat, 06 Mar 2021 at 04:58 EDT (1,208 days ago) in Capricornus

319.

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. Fri, 05 Mar 2021 at 20:30 EDT (1,209 days ago) in Ophiuchus

320.

Conjunction of Jupiter and Mercury Jupiter and Mercury share the same right ascension, at a separation of 19'. Fri, 05 Mar 2021 at 01:45 EDT (1,209 days ago) in Capricornus