Today in the history of astronomy, our solar system's ninth member is downgraded to a dwarf planet.

Ruddy planet Mars is just under 3° south of the twin suns that make up the double star Porrima in Virgo this evening.

Today in the history of astronomy, a map of the innermost planet reveals a surprise.

Today's New Moon is also called a Black Moon, as it is the third in a string of four New Moons in a single astronomical ...

Our Milky Way is one of more than 100 galaxies bound together by gravity.

Today in the history of astronomy, NASA announces our first view of the rings of Neptune.

Although faint, Comet Wierzchoś can be picked up by larger scopes as it passes near the planetary nebula NGC 6058 this ...

Targeted SETI approach listens for alien radio 'spillover' during planetary alignments, using Earth's deep space ...

This newly discovered explosion reveals the inner workings of a dying star.

Today in the history of astronomy, the outbreak of WWI derails eclipse research.

New evidence suggests that a dwarf galaxy orbiting the Milky Way called Ursa Major III is actually a star cluster.

Bright Venus is moving quickly through Gemini, now several degrees south of Pollux this morning, while the Moon crowds closer to Mercury.