A nearby Earth-sized planet offers a rare chance to study how atmospheres survive or disappear on rocky worlds.

Whether it's robotic rovers heading to Mars or, one day, a crew of astronauts, a round-trip journey is an incredibly long one ...

A spectacular cosmic event nicknamed “SN Winny” could help solve one of astronomy’s biggest mysteries: how fast the universe is expanding. This rare superluminous supernova, located 10 billion ...

The Lyrid meteor shower put on a spectacular show last night as Earth plunged through the debris stream cast off by comet ...