Gemínidas: la noche del 13 de diciembre, madrugada del 14. Se esperan 120 meteoros por hora.
Diciembre 04 de 2015: Conjunción Luna-Júpiter.
Diciembre 06 de 2015: Conjunción Luna-Marte.
Diciembre 07 de 2015: Conjunción Luna-Venus. La Luna oculta a Venus.
Diciembre 31 de 2015: Conjunción Luna-Júpiter.
- December 22 - December Solstice. The December solstice occurs at 04:48 UTC. The South Pole of the earth will be tilted toward the Sun, which will have reached its southernmost position in the sky and will be directly over the Tropic of Capricorn at 23.44 degrees south latitude. This is the first day of winter (winter solstice) in the Northern Hemisphere and the first day of summer (summer solstice) in the Southern Hemisphere.
- December 21, 22 - Ursids Meteor Shower. The Ursids is a minor meteor shower producing about 5-10 meteors per hour. It is produced by dust grains left behind by comet Tuttle, which was first discovered in 1790. The shower runs annually from December 17-25. It peaks this year on the the night of the 21st and morning of the 22nd. This year the waxing gibbous moon will be bright enough to hide most of the fainter meteors. If you are patient, you might still be able to catch some of the brighter ones. Best viewing will be just after midnight from a dark location far away from city lights. Meteors will radiate from the constellation Ursa Minor, but can appear anywhere in the sky.
- December 25 - Full Moon. The Moon will be located on the opposite side of the Earth as the Sun and its face will be will be fully illuminated. This phase occurs at 11:11 UTC. This full moon was known by early Native American tribes as the Full Cold Moon because this is the time of year when the cold winter air settles in and the nights become long and dark. This moon has also been known as the Moon Before Yule and the Full Long Nights Moon.
- December 29 - Mercury at Greatest Eastern Elongation. The planet Mercury reaches greatest eastern elongation of 19.7 degrees from the Sun. This is the best time to view Mercury since it will be at its highest point above the horizon in the evening sky. Look for the planet low in the western sky just after sunset.
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