Space

NASA: Global warming increases the risk of extreme weather

Explaining Saturn's youthful appearance

NASA's Hubble spots the remains of a stellar supernova

NGC 6559 is an emissions nebula

Ancient meteorite could reveal Martian secrets

NASA's Osiris sets sail to comet Bennu in 2016

Chandra explores a giant gas cloud in system NGC 6240

NASA's LADEE can help us understand other worlds

Herschel spacecraft going dark as liquid helium coolant supply exhausted

Virgin Galactic's SpaceShip Two breaks speed of sound