Nasa robot robots will pluck a large boulder off an asteroid . Will be tested by scientists aboard the Orion spacecraft . scientists would examine the asteroid and sample samples . Will test new technologies needed for an eventual return to earth .
Nasa robot ship will pluck a large boulder off an asteroid . Will be visited by astronauts aboard the Orion spacecraft . Astronauts would study the asteroid and collect samples . Will test new technologies needed for an eventual mission to Mars .