NASA says Bennu surprises include particle plumes and rough terrain

Asteroid Bennu, the space rock currently orbited by NASA’s OSIRIS-REx spacecraft, has offered up a couple surprise discoveries over past weeks, according to the space agency. OSIRIS-REx arrived at Bennu back in December 2018, kicking off a couple years of observations before the spacecraft’s eventual return to Earth. If everything goes as planned, NASA will receive a physical sample collected …