Monthly Night Sky information provided by Chris Vaughan (@Astrogeoguy) at Starry Night Education (@StarryNightEdu).
The moon will complete the first quarter of its 29.53-day trip around Earth on Sunday, December 8 at 10:27 a.m. EST, 7:27 a.m. PST, and 15:27 GMT. At first quarter, the moon’s 90-degree angle from the sun causes us to see it half-illuminated on its eastern side. First quarter moons always rise around mid-day and […]
On Tuesday night, December 10, the terminator on the waxing gibbous moon will cross Sinus Iridum, the Bay of Rainbows. The circular 155 mile (249 km) diameter feature is a large impact crater that was flooded by the same basalts that filled the much larger Mare Imbrium to its east – forming a round bay […]
On Thursday night, December 12, the bright, nearly full moon will shine near the planet Uranus. Use binoculars (orange circle) to look for the medium-bright star Botein (Delta Arietis) shining below the moon. If you place Botein just at the upper edge of the binoculars’ field of view, Uranus will appear as a dull, blue-green […]
On Friday evening, December 13, the orbital motion of the bright, nearly full moon will carry it through the Pleiades star cluster (aka Messier 45, Subaru, and the Seven Sisters) for some parts of the world. While bright moonlight overwhelms fainter objects, viewing the encounter during evening twilight, especially through binoculars, will make a pretty, […]
The Geminids, one of the most spectacular meteor showers of the year, is active from November 19 to December 24 annually while Earth passes through the cloud of sand-sized grains dropped by the asteroid designated 3200 Phaethon. The number of Geminids meteors will gradually ramp up to a peak in the wee hours of Saturday […]