One step closer to touching asteroid Bennu

After the successful completion of its "Checkpoint" rehearsal, NASA's first asteroid-sampling spacecraft is one step closer to touching down on asteroid Bennu. Yesterday, NASA's OSIRIS-REx spacecraft performed the first practice run of its sample collection sequence, reaching an approximate altitude of 246 feet (75 meters) over site Nightingale before executing a back-away burn from the asteroid. Nightingale, OSIRIS-REx's primary sample collection site, is located within a crater in Bennu's nort...