NASA's OSIRIS-REx spacecraft steadily descends onto asteroid Bennu

NASA's OSIRIS-REx spacecraft is getting ready to reach out its robotic arm and collect a sample from the asteroid Bennu's surface Tuesday evening.

NASA's OSIRIS-REx spacecraft steadily descends onto asteroid Bennu
NASA's OSIRIS-REx spacecraft is getting ready to reach out its robotic arm and collect a sample from the asteroid Bennu's surface Tuesday evening.