A pair of tiny, free-floating satellites, also known as SPHERES, are pictured during a session testing formation flying.
iss061e112435 (Dec, 31, 2019) — A pair of tiny, free-floating satellites, also known as SPHERES (Synchronized Position Hold, Engage, Reorient, Experimental Satellites), are pictured during a session testing formation flying using algorithms programmed in to the bowling-ball sized devices.