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December 2015 astronomy events

1 Dec 2015, 04:00 UTC
December 2015 astronomy events
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Mercury is an evening object this month. Best viewing is close to the equator. A thin crescent moon passes by the planet on the 12th and 13th. Mercury is at greatest elongation on the 29th. It will be 19.7° from the sun in the evening sky.
Jupiter, Mars, and Venus continue to dominate the morning sky. The way they appear to be pulling apart and rise earlier each morning, you could be forgiven for not noticing that they are all moving eastward. So they appear to be going down while the stars behind them go up from morning to morning.
Jupiter moves slowest of the three. It is above Virgo all month. Mars starts the month just north (or left) of the star Porrima, while Venus is below and left of Spica. The moon passes by Jupiter on the 4th, Mars on the 5th and 6th, and Venus on the 7th.
By the 22nd, Mars is left of Spica and Venus is smack dab in the middle of the diamond of Libra. Venus, the fastest of these three planets, leaves the diamond on the 26th.
It’s doubtful you’ll see the mon next to Saturn on the morning of the 10th. ...

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