Stock Photo - 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.

Stock Photo: In the International Space Station's Kibo laboratory, European Space Agency astronaut Luca Parmitano, Expedition 36 flight engineer.

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