1.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°45'. Thu, 16 Sep 2021 at 22:33 EDT (5 days ago) in Capricornus

2.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Fri, 17 Sep 2021 at 22:57 EDT (4 days ago) in Virgo

3.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 3°57'. Sat, 18 Sep 2021 at 02:54 EDT (3 days ago) in Capricornus

4.

The Moon at aphelion The Moon reaches its furthest point from the Sun. Sat, 18 Sep 2021 at 12:44 EDT (3 days ago) in Aquarius

5.

Mars at apogee Mars reaches its furthest point from the Earth. Mon, 20 Sep 2021 at 07:33 EDT (Yesterday) in Virgo

6.

Full Moon The Moon is visible for much of the night. Mon, 20 Sep 2021 at 19:54 EDT (18 hours ago) in Pisces

7.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Wed, 22 Sep 2021 at 15:14 EDT (Tomorrow) in Virgo

8.

The Moon at apogee The Moon appears small as it recedes to its furthest point from the Earth. Sun, 26 Sep 2021 at 17:43 EDT (5 days away) in Taurus

9.

Daytime Sextantid meteor shower 2021 The Daytime Sextantid meteor shower reaches its peak. Mon, 27 Sep 2021 (6 days away) in Sextans

10.

Moon at Last Quarter The Moon rises in the east at around midnight and appears high in the sky at sunrise. Tue, 28 Sep 2021 at 21:57 EDT (7 days away) in Gemini

11.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun. Thu, 30 Sep 2021 at 10:37 EDT (9 days away) in Coma Berenices

12.

Asteroid 40 Harmonia at opposition Asteroid 40 Harmonia is well placed for observation. Fri, 01 Oct 2021 at 22:22 EDT (10 days away) in Cetus

13.

Venus at aphelion Venus reaches its furthest point from the Sun. Sun, 03 Oct 2021 at 00:07 EDT (12 days away) in Libra

14.

October Camelopardalid meteor shower 2021 The October Camelopardalid meteor shower reaches its peak. Tue, 05 Oct 2021 (14 days away) in Draco

15.

New Moon The Moon disappears into the Sun's glare. Wed, 06 Oct 2021 at 07:06 EDT (15 days away) in Virgo

16.

Mars at solar conjunction Mars is unobservable as it passes around the far side of the Sun. Thu, 07 Oct 2021 at 23:35 EDT (16 days away) in Virgo

17.

The Moon at perihelion The Moon reaches its closest point to the Sun. Fri, 08 Oct 2021 at 11:45 EDT (17 days away) in Libra

18.

The Moon at perigee The Moon appears large as it makes its closest approach to the Earth. Fri, 08 Oct 2021 at 13:27 EDT (17 days away) in Libra

19.

Draconid meteor shower 2021 The Draconid meteor shower reaches its peak. Fri, 08 Oct 2021 (17 days away) in Draco

20.

Mercury at inferior solar conjunction Mercury passes around the near side of the Sun. Sat, 09 Oct 2021 at 12:14 EDT (18 days away) in Virgo