Luca Parmitano works with free-flying satellites known as Synchronized Position Hold, Engage, Reorient, Experimental Satellites, or SPHERES.
ISS036-E-039697 (4 Sept. 2013) — In the International Space Station’s Kibo laboratory, European Space Agency astronaut Luca Parmitano, Expedition 36 flight engineer, conducts a session with a pair of bowling-ball-sized free-flying satellites known as Synchronized Position Hold, Engage, Reorient, Experimental Satellites, or SPHERES.