Ключевые слова: 19, activity, american, astronaut, barratt, center, centre, city, cosmonaut, crew, crewmembers, eva, expedition, extravehicular, flight, gagarin, gctc, gennady, gravity, increment, inorbit, international, iss, michael, nasa, onorbit, orbit, padalka, run, russia, russian, simulate, space, spacesuit, spacewalk, star, station, suit, suited, training, underwater, us, usa, walk, water, weightlessness, zero,