This video shows CanSat comeback competition in Noshiro Space Event 2010 in Japan. The CanSat simulated the can-sized satellite. In Japan, some students developing CanSat. CanSat is launched by a balloon or a rocket. After separation from the balloon or the rocket, CanSat fly down from the heights with control. The students compete the distance from target point on the ground to touch down point. It's called comeback competition.