Skywatchers in the Americas on Thursday evening, January 9 can watch the orbital motion of the bright, 82%-illuminated gibbous moon carry it through the Pleiades star cluster (aka Messier 45,…

The three stars in Orion’s belt may look the same at a glance, but they are actually quite different under closer inspection. Magnitude 1.85 Alnitak (Zeta Orionis) on the left…