Astronomers recently released a new image of the binary star system Eta Carinae's full spectrum, taken from deep in Chile's ...

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 ...

October will be an interesting month in the sky. Unmistakable Saturn will rule the southern skies with a steady, pale-yellow ...

• On the evening of Oct. 9, the moon will pass through the Pleiades star cluster. Use binoculars to see some of its stars around the moon, and use a telescope to see stars pop out along the dark edge ...

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 ...

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

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.

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 ...

*Times for sunrise, sunset, moonrise, and moonset are given in local time from 40° N 90° W. The Moon’s illumination is given at 12 P.M. local time from the same location. For a look ahead at more ...