Planet-forming particles swarm an unlikely star host.

Plentiful ice in the Saturn system hints at its age.

Astronomers measure how fast a black hole spins.

A river valley found on a distant moon resembles Earth’s Nile.

A giant hole in the dust disk around a star could hold multiple planets.

Students partner with NASA to direct cameras orbiting the Moon.

An enormous galaxy cluster is birthing stars at a furious pace.

NASA’s mission control guided Curiosity to a perfect landing in Gale Crater.

Sky-gazers caught a rare glimpse of Venus framed by the Sun.

SpaceX launches the first private mission to the International Space Station.