1.

Mars at solar conjunction Mars is unobservable as it passes around the far side of the Sun. Mon, 02 Sep 2019 at 05:01 MDT (13 days ago) in Leo

2.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Tue, 03 Sep 2019 at 19:27 MDT (12 days ago) in Leo

3.

C/2018 W2 (Africano) at perihelion C/2018 W2 (Africano) makes its closest approach to the Sun. Thu, 05 Sep 2019 (10 days ago) in Perseus

4.

Moon at First Quarter The Moon appears high in the sky at sunset and sets in the west at around midnight. Thu, 05 Sep 2019 at 21:12 MDT (10 days ago) in Ophiuchus

5.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 2°18'. Fri, 06 Sep 2019 at 00:53 MDT (9 days ago) in Ophiuchus

6.

Close approach of the Moon and Jupiter The Moon and Jupiter pass within 2°15' of each other. Fri, 06 Sep 2019 at 01:40 MDT (9 days ago) in Ophiuchus

7.

Asteroid 135 Hertha at opposition Asteroid 135 Hertha is well placed for observation. Fri, 06 Sep 2019 at 03:35 MDT (9 days ago) in Aquarius

8.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 0°02'. Sun, 08 Sep 2019 at 07:42 MDT (7 days ago) in Sagittarius

9.

Close approach of the Moon and Saturn The Moon and Saturn pass within 0°02' of each other. Sun, 08 Sep 2019 at 07:42 MDT (7 days ago) in Sagittarius

10.

Close approach of the Moon and Pluto The Moon and Pluto pass within 0°03' of each other. Sun, 08 Sep 2019 at 21:38 MDT (7 days ago) in Sagittarius

11.

September ε-Perseid meteor shower The September ε-Perseid meteor shower reaches its peak. Mon, 09 Sep 2019 (6 days ago) in Perseus

12.

Neptune at opposition Neptune is well placed for observation. Tue, 10 Sep 2019 at 01:10 MDT (5 days ago) in Aquarius

13.

The Moon at aphelion The Moon reaches its furthest point from the Sun. Wed, 11 Sep 2019 at 04:17 MDT (4 days ago) in Capricornus

14.

The Moon at apogee The Moon appears small as it recedes to its furthest point from the Earth. Fri, 13 Sep 2019 at 07:33 MDT (2 days ago) in Aquarius

15.

Full Moon The Moon is visible for much of the night. Fri, 13 Sep 2019 at 22:34 MDT (2 days ago) in Aquarius

16.

Moon at Last Quarter The Moon rises in the east at around midnight and appears high in the sky at sunrise. Sat, 21 Sep 2019 at 20:42 MDT (6 days away) in Orion

17.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Mon, 23 Sep 2019 at 01:36 MDT (8 days away) in Virgo

18.

Close approach of the Moon and M44 The Moon and M44 pass within 0°42' of each other. Tue, 24 Sep 2019 at 16:01 MDT (9 days away) in Cancer

19.

NGC 55 is well placed NGC 55, a barred irregular galaxy in Sculptor is well placed for observation. Wed, 25 Sep 2019 (10 days away) in Sculptor

20.

C/2018 W2 (Africano) reaches its brightest C/2018 W2 (Africano) is well placed for observation. Thu, 26 Sep 2019 (11 days away) in Pegasus