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Discover interesting facts about Saturn, its rings and whether it could contain extraterrestrial life.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new study hints.

Stars can be billions of times brighter than the planets scientists are trying to study, making them hard to see. To fix this, NASA is developing the known universe's biggest pair of sunglasses ...

The rest of us explored below, pressing forward, sounding the planet’s largest known enclosed space. Overhead the swifts chattered and bickered and called without rest, occasionally dropping ...