Tonight and tomorrow night, let the moon show you the constellation Taurus the Bull on the great dome of sky. How to recognize the Bull’s 2 most prominent features, here.
Supernovae - exploding stars - are unpredictable. But an amateur astronomer in Argentina happened to catch one just as it began to explode. "It's like winning the cosmic lottery," one astronomer said.
Tonight - February 21, 2018 - watch the waxing crescent moon light up the evening sky as it dances along the southern boundary of the constellation Aries the Ram.
Of course, the far side of the moon stays hidden from Earth, for the most part. But lunar libration brings a bit of the usually-hidden western limb of the moon into view tonight.
Sirius, the sky's brightest star, is sometimes called the Dog Star because it's in the constellation Canis Major, the Greater Dog. In this Chinese Year of the Dog ... a photo from Hong Kong.