float freely in orbit – to space-walk. He was pilot of the Voskhod 2 mission, part of the Soviet Union’s attempt in competition with the US to reach the moon. Leonov’s walk on 18 March 1965 ...

During the walk, Williams and Wilmore removed hardware outside the space station and collected ... how many, and how far they may travel," NASA explains of the program. "This experiment could ...

And according to a newly released video from NASA astronaut Drew Feustel, one of those symptoms is being unable to walk a straight ... during trips to far-flung places in deep space.