Lunar crater Endymion normally sits close to the northeastern limb. Tonight, libration has brought it into clearer view.

A dying star's glowing shell in Lyra offers a haunting preview of our solar system's fate — visible through a small telescope.

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

Poland, Nicolaus Copernicus was raised by his uncle, Bishop Lucas Watzenrode, who ensured he was well educated as he grew up.

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

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

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

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.

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

Saturn dominates the predawn sky, while Mars is rising earlier each day. The Red Planet is still a bit challenging — can you ...