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3 December, 15:47 Full moon
4 December, 08:52 Moon at perigee
13 December, 01:48 Mercury at inferior conjunction
14 December, 03:00 Geminids peak
18 December, 06:30 New moon
19 December, 01:43 Moon at apogee
21 December, 16:28 Earth at southern solstice
21 December, 21:00 Saturn at conjunction
source: http://en.wikipedia.org/wiki/Portal:Astronomy/Events/December_2017