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 telescope observes the Universe's oldest light.
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.