A trio of planets stand in line in the evening sky after sunset: Jupiter, Venus, and Mercury, all visible in the twilit sky.

Hi, I’m Dave Eicher, editor emeritus of Astronomy Magazine. Welcome to This Week in Astronomy, brought to you by Celestron, the world’s leading manufacturer of telescopes. You know, this time I want ...

Main-belt asteroid Egeria is sliding past several stationary background stars tonight, offering a chance to catch its ...

Today in the history of astronomy, the man who revolutionized astronomy passes away.

Slicing through the Montes Alpes mountain range, Vallis Alpes is a favorite feature to view on the First Quarter Moon.

The smallest planet appears after sunset as the waxing Moon reaches First Quarter and star clusters shine in the sky this ...

Today in the history of astronomy, space weather forecasters narrowly avert nuclear war.

The constellation Auriga (pronounced or-EYE-guh) the Charioteer, a star pattern known by this name for several thousand years ...

Venus and Jupiter are visible in the evening, while there's a conjunction of Mars and Uranus in the predawn sky.

Ganymede and Europa transit Jupiter tonight, while Io disappears in an occultation. West Coast observers can catch a double ...

The final mission before the landmark Apollo 11, Apollo 10 served as a dress rehearsal, testing every aspect of the Moon landing except for the actual landing itself. On May 18, the crew of Commander ...

Born at the same time, the star that formed Sirius B started out more massive and evolved more quickly than its companion, ...