321.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Wed, 13 Sep 2017 (2,470 days ago) in Leo

322.

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. Wed, 13 Sep 2017 at 12:06 EDT (2,470 days ago) in Taurus

323.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Fri, 15 Sep 2017 at 08:33 EDT (2,468 days ago) in Leo

324.

Conjunction of Mercury and Mars Mercury and Mars share the same right ascension, at a separation of 3'22". Sat, 16 Sep 2017 at 14:23 EDT (2,467 days ago) in Leo

325.

Supernova SN2017gxq discovered A new supernova has been discovered in NGC 4964. Sat, 16 Sep 2017 (2,466 days ago)

326.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Sun, 17 Sep 2017 at 20:39 EDT (2,466 days ago) in Leo

327.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation visible from countries and territories including Australia, Indonesia, New Zealand and Papua New Guinea amongst others. Sun, 17 Sep 2017 at 20:39 EDT (2,466 days ago) in Leo

328.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 32'. Sun, 17 Sep 2017 at 20:55 EDT (2,466 days ago) in Leo

329.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including Sudan, Libya, Chad and Egypt amongst others. Mon, 18 Sep 2017 at 00:59 EDT (2,465 days ago) in Leo

330.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 8'20". Mon, 18 Sep 2017 at 15:42 EDT (2,465 days ago) in Leo

331.

Close approach of the Moon and Mercury The Moon and Mercury pass close to each other. Mon, 18 Sep 2017 at 19:20 EDT (2,465 days ago) in Leo

332.

Lunar occultation of Mercury The Moon will pass in front of Mercury, creating a lunar occultation visible from countries and territories including China, Philippines, Indonesia and Malaysia amongst others. Mon, 18 Sep 2017 at 19:20 EDT (2,465 days ago) in Leo

333.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 1'46". Mon, 18 Sep 2017 at 19:21 EDT (2,465 days ago) in Leo

334.

New Moon The Moon disappears into the Sun's glare for a few days. Wed, 20 Sep 2017 at 01:31 EDT (2,463 days ago) in Virgo

335.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°44'. Fri, 22 Sep 2017 at 03:51 EDT (2,461 days ago) in Virgo

336.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Fri, 22 Sep 2017 at 15:57 EDT (2,461 days ago) in Virgo

337.

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. Fri, 22 Sep 2017 at 23:36 EDT (2,461 days ago) in Virgo

338.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Mon, 25 Sep 2017 (2,458 days ago) in Sculptor

339.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Tue, 26 Sep 2017 at 09:07 EDT (2,457 days ago) in Coma Berenices

340.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°28'. Tue, 26 Sep 2017 at 19:49 EDT (2,457 days ago) in Ophiuchus