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 (12 days ago) in Capricornus

2.

Close approach of the Moon and Saturn The Moon and Saturn pass within 3°40' of each other. Thu, 16 Sep 2021 at 23:57 EDT (12 days ago) in Capricornus

3.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Fri, 17 Sep 2021 at 22:57 EDT (11 days ago) in Virgo

4.

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 (10 days ago) in Capricornus

5.

Close approach of the Moon and Jupiter The Moon and Jupiter pass within 3°45' of each other. Sat, 18 Sep 2021 at 05:07 EDT (10 days ago) in Capricornus

6.

The Moon at aphelion The Moon reaches its furthest point from the Sun. Sat, 18 Sep 2021 at 12:44 EDT (10 days ago) in Aquarius

7.

Mars at apogee Mars reaches its furthest point from the Earth. Mon, 20 Sep 2021 at 07:33 EDT (8 days ago) in Virgo

8.

Full Moon The Moon is visible for much of the night. Mon, 20 Sep 2021 at 19:54 EDT (8 days ago) in Pisces

9.

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 (6 days ago) in Virgo

10.

Close approach of the Moon and Uranus The Moon and Uranus pass within 1°14' of each other. Fri, 24 Sep 2021 at 13:08 EDT (4 days ago) in Aries

11.

NGC 55 is well placed NGC 55 (mag 8.4), a barred irregular galaxy in Sculptor is well placed in the sky. Fri, 24 Sep 2021 (4 days ago) in Sculptor

12.

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 (2 days ago) in Taurus

13.

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

14.

47-Tuc is well placed The second brightest globular cluster in the sky, 47 Tuc (NGC 104; mag 4.0), in Tucana is well placed in the sky. Mon, 27 Sep 2021 (Today) in Tucana

15.

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 (35 minutes ago) in Gemini

16.

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 (2 days away) in Coma Berenices

17.

M110 is well placed M110 (mag 8.9), the brightest satellite galaxy of the Andromeda galaxy (M31) is well placed in the sky. Fri, 01 Oct 2021 (3 days away) in Andromeda

18.

Asteroid 40 Harmonia at opposition Asteroid 40 Harmonia is well placed for observation. Fri, 01 Oct 2021 at 22:22 EDT (3 days away) in Cetus

19.

M32 is well placed M32 (mag 9.0), the second brightest satellite galaxy of the Andromeda galaxy (M31) after M110 is well placed in the sky. Sat, 02 Oct 2021 (4 days away) in Andromeda

20.

M31 is well placed The Andromeda galaxy (M31; mag 4.4) is well placed in the sky. Sat, 02 Oct 2021 (4 days away) in Andromeda