Check Out NASA's Asteroid-Catching Robot Arms (Photo)

NASA to launch the robotic portion of its Asteroid Redirect Mission (ARM) in 2021. The collected sample will be used in a demonstration of enhanced gravity tractor  asteroid deflection. Recently at the Robotic Operation's Center of NASA's Goddard Space Flight Center in Greenbelt, Maryland, a robotic capture module system prototype used a mock asteroid boulder to test its capabilities.