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Weightlessness, state of not experiencing the effects of gravity.
For information on:
- forces at work, see Gravitation: Acceleration; Free Fall; Thematic Essay: Physics, from Leonardo to Hertz
- studies by astronauts, see picture, Space Shuttle Astronaut Experiencing Weightlessness, in Aerospace Medicine: Space Medicine; Astronaut: What Do Astronauts Do?; Roberta Lynn Bondar; Spacelab; Vostok Program: Introduction
- biological effects of weightlessness, see Aerospace Medicine: Physiological Findings; Osteoporosis
- reducing effects of weightlessness, see Space Exploration: Salyut Space Stations
- video of astronauts experiencing weightlessness, see video, Playing in Space, in Space Shuttle: Later Missions
- neutral buoyancy in sport diving, see Diving (underwater): Training and Certification
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