OSIRUS-REx − an unmanned, solar-powered spacecraft about the size of a household toolshed − traveled 4.4 billion miles over the past seven years to bring back samples from Bennu.

OSIRUS-REx finished a 4-billion-mile mission to collect samples of asteroid Bennu in September. With asteroid Apophis making its way toward Earth, NASA decided to utilize OSIRUS-REx for this new ...