121.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight. Mon, 13 Sep 2021 at 16:39 EDT (949 days ago) in Ophiuchus

122.

Mercury at greatest elongation east Mercury is bright and well placed in the evening sky. Mon, 13 Sep 2021 at 17:55 EDT (949 days ago) in Virgo

123.

Neptune at opposition Neptune lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Tue, 14 Sep 2021 at 05:12 EDT (948 days ago) in Aquarius

124.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from countries and territories including Australia, Papua New Guinea, Indonesia and Solomon Islands amongst others. Wed, 15 Sep 2021 at 05:23 EDT (947 days ago) in Sagittarius

125.

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 (946 days ago) in Capricornus

126.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Thu, 16 Sep 2021 at 23:57 EDT (946 days ago) in Capricornus

127.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Fri, 17 Sep 2021 at 22:57 EDT (945 days ago) in Virgo

128.

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 (944 days ago) in Capricornus

129.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Sat, 18 Sep 2021 at 05:07 EDT (944 days ago) in Capricornus

130.

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. Sat, 18 Sep 2021 at 12:44 EDT (944 days ago) in Aquarius

131.

Mars at apogee Mars reaches its furthest point from the Earth, as it passes around the far side of the Sun. Mon, 20 Sep 2021 at 07:33 EDT (942 days ago) in Virgo

132.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 20 Sep 2021 at 19:54 EDT (942 days ago) in Pisces

133.

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 (940 days ago) in Virgo

134.

Close approach of the Moon and Uranus The Moon and Uranus pass close to each other. Fri, 24 Sep 2021 at 13:08 EDT (938 days ago) in Aries

135.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Fri, 24 Sep 2021 (938 days ago) in Sculptor

136.

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, 26 Sep 2021 at 17:43 EDT (936 days ago) in Taurus

137.

Daytime Sextantid meteor shower 2021 The Daytime Sextantid meteor shower reaches its peak. Mon, 27 Sep 2021 (935 days ago) in Sextans

138.

47 Tuc is well placed The second brightest globular cluster in the sky, 47 Tuc (NGC 104; mag 4.0), in Tucana culminates at around midnight local time. Mon, 27 Sep 2021 (935 days ago) in Tucana

139.

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. Tue, 28 Sep 2021 at 21:57 EDT (934 days ago) in Gemini

140.

136472 Makemake at solar conjunction 136472 Makemake 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, 30 Sep 2021 at 10:36 EDT (932 days ago) in Coma Berenices