Space missions in the future could travel to Mars, asteroids and the outer solar system by riding on nuclear-powered rockets, thanks to a new design that utilizes energy from the nuclear fission of ...

Mason Peck, an aerospace engineer at Cornell, was trying to test innovative designs in spacecraft when a stop-work order hit.

The idea of a human mission to explore Mars has been studied repeatedly over the past 75 years. More than 1,000 piloted Mars mission studies were conducted inside and outside NASA between about 1950 ...

NASA and Northrop Grumman had delayed the arrival of a Cygnus XL spacecraft to the orbital outpost after an issue with its main engine was detected. Flight engineers were able to determine that it ...

Live coverage of the event will stream on NASA channels beginning at 6:30 p.m. ET Monday, according to the space agency. The mission, dubbed the Crew Flight Test, could take off as soon as Monday at ...