@howitworkssss: It sounds terrifying, but the idea is partly true. In the vacuum of space, if an astronaut is floating with no nearby wall, handrail, or object to push against, they can't change their motion by simply trying to swim through empty space. Without an external force, they'll keep drifting at the same speed and direction due to Newton's First Law of Motion. However, astronauts are not left helpless. During spacewalks they wear safety tethers, and many suits include the SAFER backpack, which uses tiny thrusters to help them return safely if they become untethered. Inside spacecraft like the ISS, there are always walls, handrails, and airflow that help astronauts move around. So while floating forever is possible in theory, modern space missions are carefully designed to prevent that from happening. #Space #Astronaut #Science #NASA