On April 23, 2014 at 08:58 UTC the “Progress M-21M” unmanned supply spacecraft was undocked from the Russian “Zvezda” (Star) module of the International Space Station. The spacecraft will perform an autonomous flight till April 25, 2014 and then it will be docked with the ISS again. The aim of the autonomous flight and the 2nd docking is to test the “Kurs-NA” docking system.
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