Watch the latest Mars rover hunt for signs of life.
Two giant galaxies combine to form a massive ellipse.
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 telescope observes the Universe's oldest light.
An enormous galaxy cluster is birthing stars at a furious pace.