Q&A with Scott Bolton, principal investigator on NASA’s Juno mission

Equipped with a robot arm, sample collector and return capsule, NASA’s asteroid-bound OSIRIS-REx probe emerged from its pristine factory and flew to the launch site in Florida on Friday.

NASA’s Dawn spacecraft has begun its final approach to the dwarf planet Ceres, the largest object in the asteroid belt, for an in-depth survey of the uncharted world.

The U.S. Navy has declared the primary orbit-raising system aboard its new MUOS No. 5 communications satellite failed, leaving controllers scrambling to design a rescue plan.