Can make astronauts become an independent spacecraft. The original spacewalker was designed for the American space shuttle, but astronauts in the former Soviet Union later used similar devices. The spacewalker looks like an armchair, with a height of 125 cm and a weight of 100 kg. The spacewalker is connected to the back of the spacesuit, and there are two iron arms with all control buttons on the chair. By manipulating these buttons, astronauts can move in any direction at a speed of 20 meters per second. The motion thrust of the spacewalker comes from some small nozzles, which can make the nitrogen in the two high-pressure tanks spray out. The spacewalker enables astronauts to move freely in space.