Jupiter is easy to spot, brighter than all the stars. It’s high in the south after sunset. It sets after midnight local time in early December and is gone before midnight at month’s end. Mars rises in the east before sunset and is visible all night. It’s very red now and brighter than most stars, racing toward its December 8 opposition, when Earth will fly between Mars and the sun. Saturn is low in the southwestern sky after sunset – golden in color, shining steadily – best time for observing is right after darkness falls. It sets by around 10 p.m. local time at the beginning of December and around 8 p.m. at the end of the month. Venus, the brightest planet and next planet inward from Earth in orbit around the sun, is climbing higher each night in the sunset twilight. By the end of December, it sets about 70 minutes after sunset. Mercury is near Venus in the evening twilight and will reach greatest elongation on December 21, 2022. Start looking for Mercury right after sunset the second week of December. Visibility of this elusive planet improves throughout the month.
Visible planets (morning)
On December mornings, Mars is shining brightly in the west (opposite the sunrise horizon).
People often ask if our charts apply to them. Yes, if you’re in the Northern Hemisphere. Not as precisely, however, if you’re in the Southern Hemisphere. Our charts are mostly set for the northern half of Earth. To see a precise view from your location, try Stellarium Online.
December 24 evening: Moon near planets Mercury and Venus
December 25 and 26 evenings: Moon near Saturn
December 28 evening: Mercury and Venus Conjunction
December 28 and 29 evenings: Moon near Jupiter
The instant of 1st quarter moon is 1:20 UTC on December 30 (7:20 p.m. CDT on December 29)
December 2022 heliocentric solar system planets
The sun-centered charts below come from Guy Ottewell. You’ll find charts like these for every month of 2022 here, in his Astronomical Calendar. Guy Ottewell explains:
In these views from ecliptic north, arrows (thinner when south of the ecliptic plane) are the paths of the four inner planets. Dots along the rest of the orbits are five days apart (and are black for the part of its course that a planet has trodden since the beginning of the year). Also, semicircles show the sunlit side of the new and full moon (vastly exaggerated in size and distance). Additionally, pairs of lines point outward to the more remote planets.
Phenomena such as perihelia (represented by ticks) and conjunctions (represented by lines between planets) are at dates that can be found in the Astronomical Calendar. Likewise, gray covers the half of the universe below the horizon around 10 p.m. at mid-month (as seen from the equator). The zodiacal constellations are in directions from the Earth at mid-month (not from the sun).
Bottom line: In December, the morning planet is Mars. In the evening, the gas giant planets Jupiter and Saturn dominate the southern sky as night falls, with Mars rising before sunset and visible all night. Later, Venus and Mercury appear low above the horizon after sunset. You can see all five bright planets – starting the second week of December – through the end of the month.
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