A long-running effort to build one of the world's largest telescopes on a mountain sacred to Native Hawaiians is moving forward after a key approval...

A long-running effort to build one of the world's largest telescopes on a mountain sacred to Native Hawaiians is moving forward...

Australia has announced it will create its own space agency to increase its share of the $330 billion space economy...

A U.S. spy satellite atop an Atlas V rocket blasted off on a classified mission Saturday night from Vandenberg Air Force Base in California...

NASA's asteroid-chasing spacecraft, Osiris-Rex, swings by Earth on Friday on its way to a space rock...

Winds from Hurricane Irma have toppled a tiny tree that orbited the moon and later grew at the Kennedy Space Center Visitor Complex in Florida...

Six NASA-backed research subjects who have been living in a Mars-like habitat on a remote Hawaii volcano since January have emerged from isolation...

After eight months of living in isolation on a remote Hawaii volcano, six NASA-backed research subjects will emerge from their Mars-like habitat...

NASA's Cassini spacecraft burns up over Saturn, ending a remarkable voyage of 20 years...

NASA's Cassini spacecraft burns up in skies over Saturn, ending a remarkable voyage of 20 years...