On December 6, 2017, the US "Cygnus” (CRS OA-8 ““Eugene Cernan”) unmanned supply spacecraft was undocked from the International Space Station. The spacecraft, which had been attached to the space station since November 14, 2017, was released by US astronaut Mark Vande Hei aboard the station using the orbiting complex's huge robotic arm at 13:11 UTC. It was the 8^th successful flight of "Cygnus” to the ISS. But Cygnus CRS-8 spacecraft’s mission is not over.