21.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Fri, 15 Oct 2021 at 05:21 PDT (1,359 days ago) in Capricornus

22.

The Triangulum Galaxy is well placed The Triangulum Galaxy M33 (mag 5.8) culminates at around midnight local time. Fri, 15 Oct 2021 (1,359 days ago) in Triangulum

23.

136199 Eris at opposition 136199 Eris lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Sun, 17 Oct 2021 at 02:27 PDT (1,357 days ago) in Cetus

24.

The Moon at aphelion The Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon. Sun, 17 Oct 2021 at 18:12 PDT (1,357 days ago) in Aquarius

25.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Sun, 17 Oct 2021 at 22:13 PDT (1,357 days ago) in Capricornus

26.

ε-Geminid meteor shower 2021 The ε-Geminid meteor shower reaches its peak. Mon, 18 Oct 2021 (1,356 days ago) in Gemini

27.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Tue, 19 Oct 2021 at 16:51 PDT (1,355 days ago) in Virgo

28.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 20 Oct 2021 at 07:56 PDT (1,354 days ago) in Pisces

29.

Orionid meteor shower 2021 The Orionid meteor shower reaches its peak. Thu, 21 Oct 2021 (1,353 days ago) in Orion

30.

136108 Haumea at solar conjunction 136108 Haumea is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 21 Oct 2021 at 07:30 PDT (1,353 days ago) in Bootes

31.

Close approach of the Moon and Uranus The Moon and Uranus pass close to each other. Thu, 21 Oct 2021 at 15:39 PDT (1,353 days ago) in Aries

32.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Sat, 23 Oct 2021 at 15:40 PDT (1,351 days ago) in Virgo

33.

Leonis Minorid meteor shower 2021 The Leonis Minorid meteor shower reaches its peak. Sun, 24 Oct 2021 (1,350 days ago) in Leo Minor

34.

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. Sun, 24 Oct 2021 at 08:28 PDT (1,350 days ago) in Taurus

35.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Sun, 24 Oct 2021 (1,349 days ago) in Virgo

36.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sun, 24 Oct 2021 at 20:45 PDT (1,350 days ago) in Virgo

37.

The Perseus Double Cluster is well placed The Perseus Double Cluster (NGC 869 and NGC 884; combined mag 4.3) culminates at around midnight local time. Tue, 26 Oct 2021 (1,348 days ago) in Perseus

38.

Venus at dichotomy Venus reaches half phase in the evening sky. Thu, 28 Oct 2021 at 07:28 PDT (1,346 days ago) in Ophiuchus

39.

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. Thu, 28 Oct 2021 at 13:05 PDT (1,346 days ago) in Cancer

40.

Venus at greatest elongation east Venus is bright and well placed in the evening sky. Fri, 29 Oct 2021 at 07:57 PDT (1,345 days ago) in Ophiuchus