The Milky Way Galaxy contains an estimated 400 billion stars, with the faintest (M dwarfs) posing challenges to accurate counts. The Perseus Moving Group (Melotte 20), a cluster containing ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a celestial rendezvous that should be visible across the U.S.

Watch the crescent moon, Venus and the bright star Regulus align in a rare predawn close conjunction tomorrow.

One of the questions I receive most frequently is this: Since the stars are so distant and their light takes many centuries to reach us, how do we know they still exist? An excellent question but one ...

Why is the night sky dark? This simple question, known as Olbers' paradox, has perplexed astronomers for centuries. In an infinite, eternal universe filled with stars, every line of sight should end ...

On Sept. 16, skywatchers can spot a cosmic diamond as the crescent moon, Jupiter, Castor and Pollux come to an apparent ...

August 22nd: The Swan Nebula (M17) reaches its highest point around 11 PM local daylight time, observable with binoculars or telescopes in northwestern Sagittarius. August 23rd: A New Moon, termed a ...