Bright reflections that radar detected beneath the south pole of Mars may not be underground lakes as previously thought but deposits of clay instead, a new study finds.

A pair of astronomers have proposed two new strategies for preventing possible asteroid impacts.

A fizzled example of a gamma-ray burst, the most powerful kind of explosion known in the universe, suggests these outbursts can be surprisingly brief, researchers say.

The International Space Station has gained a new room after a 13-year wait for its launch and a week-long journey in Earth orbit.