81.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Mon, 01 Jan 2018 at 19:51 EDT (2,311 days ago) in Ophiuchus

82.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month. Mon, 01 Jan 2018 at 16:48 EDT (2,311 days ago) in Gemini

83.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from countries and territories including Canada, Greenland, the Contiguous United States and Russia amongst others. Sat, 30 Dec 2017 at 19:35 EDT (2,313 days ago) in Taurus

84.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Sat, 30 Dec 2017 at 16:03 EDT (2,313 days ago) in Taurus

85.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Fri, 29 Dec 2017 (2,314 days ago) in Monoceros

86.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Thu, 28 Dec 2017 (2,314 days ago) in Ophiuchus

87.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Thu, 28 Dec 2017 (2,315 days ago) in Monoceros

88.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Wed, 27 Dec 2017 at 18:29 EDT (2,316 days ago) in Ophiuchus

89.

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. Tue, 26 Dec 2017 at 04:20 EDT (2,317 days ago) in Pisces

90.

Ursid meteor shower 2017 The Ursid meteor shower reaches its peak. Fri, 22 Dec 2017 (2,321 days ago) in Ursa Minor

91.

Saturn at solar conjunction Saturn 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 Dec 2017 at 15:59 EDT (2,322 days ago) in Sagittarius

92.

December solstice 21 December will be the shortest day of 2017 in the northern hemisphere. Thu, 21 Dec 2017 at 11:23 EDT (2,322 days ago) in Sagittarius

93.

December Leonis Minorid meteor shower 2017 The December Leonis Minorid meteor shower reaches its peak. Tue, 19 Dec 2017 (2,324 days ago) in Leo Minor

94.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Mon, 18 Dec 2017 at 21:39 EDT (2,325 days ago) in Sagittarius

95.

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. Mon, 18 Dec 2017 at 20:25 EDT (2,325 days ago) in Sagittarius

96.

New Moon The Moon disappears into the Sun's glare for a few days. Mon, 18 Dec 2017 at 01:31 EDT (2,325 days ago) in Sagittarius

97.

Asteroid 20 Massalia at opposition Asteroid 20 Massalia makes closest approach to the Earth. Fri, 15 Dec 2017 at 23:46 EDT (2,327 days ago) in Taurus

98.

Comae Berenicid meteor shower 2017 The Comae Berenicid meteor shower reaches its peak. Fri, 15 Dec 2017 (2,327 days ago) in Leo

99.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Fri, 15 Dec 2017 (2,328 days ago) in Orion

100.

The Running Man cluster is well placed The Running Man cluster NGC 1977 (mag 4.2) in Orion's sword culminates at around midnight local time. Fri, 15 Dec 2017 (2,328 days ago) in Orion