GOCE’s sophisticated electric ion propulsion system has been switched on and confirmed to be operating normally, marking another crucial milestone in the satellite’s post-launch commissioning phase.

CLEVELAND — A small robotic surveyor arrives to explore a near-Earth asteroid. Another robotic spacecraft is returning to Earth with a pristine comet surface sample. Meanwhile, a robotic explorer is ...

NASA and Aerojet Rocketdyne are taking a big step in testing a new ion propulsion engine that will help power lunar exploration. The Advanced Electric Propulsion System (AEPS) has been undergoing ...

Quick update on NASA's amazing plan to lasso an asteroid: they're making progress on the ion propulsion engine they'll need for the mission, one month after president Obama proposed giving NASA $100 ...