161.

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 12:40 EDT (924 days ago) in Cetus

162.

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 21:12 EDT (924 days ago) in Aquarius

163.

Jupiter ends retrograde motion Jupiter returns to its usual eastward motion after opposition. Mon, 18 Oct 2021 at 01:13 EDT (923 days ago) in Capricornus

164.

ε-Geminid meteor shower 2021 The ε-Geminid meteor shower reaches its peak. Mon, 18 Oct 2021 (923 days ago) in Gemini

165.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Tue, 19 Oct 2021 at 19:51 EDT (922 days ago) in Virgo

166.

Full Moon The Moon reaches full phase and is visible for much of the night. Wed, 20 Oct 2021 at 10:56 EDT (921 days ago) in Pisces

167.

Orionid meteor shower 2021 The Orionid meteor shower reaches its peak. Thu, 21 Oct 2021 (920 days ago) in Orion

168.

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 18:08 EDT (920 days ago) in Bootes

169.

Close approach of the Moon and Uranus The Moon and Uranus pass close to each other. Thu, 21 Oct 2021 at 18:39 EDT (920 days ago) in Aries

170.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Sat, 23 Oct 2021 at 18:40 EDT (918 days ago) in Virgo

171.

Leonis Minorid meteor shower 2021 The Leonis Minorid meteor shower reaches its peak. Sun, 24 Oct 2021 (917 days ago) in Leo Minor

172.

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 11:28 EDT (917 days ago) in Taurus

173.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Sun, 24 Oct 2021 (916 days ago) in Virgo

174.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sun, 24 Oct 2021 at 23:45 EDT (917 days ago) in Virgo

175.

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 (915 days ago) in Perseus

176.

Venus at dichotomy Venus reaches half phase in the evening sky. Thu, 28 Oct 2021 at 10:28 EDT (913 days ago) in Ophiuchus

177.

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 16:05 EDT (913 days ago) in Cancer

178.

Venus at greatest elongation east Venus is bright and well placed in the evening sky. Fri, 29 Oct 2021 at 10:57 EDT (912 days ago) in Ophiuchus

179.

Comet 67P/Churyumov-Gerasimenko passes perihelion Comet 67P/Churyumov-Gerasimenko makes its closest approach to the Sun. Tue, 02 Nov 2021 (908 days ago) in Gemini

180.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 1°13'. Wed, 03 Nov 2021 at 14:39 EDT (907 days ago) in Virgo