Related by context. Frequent words. (Click for all words.) 50 weightless 47 zero gravity 46 weightlessness 46 earthbound 43 spaceship 43 outer space 42 cosmonauts 42 glide 41 astronaut 41 Space Shuttle Discovery 40 cosmonaut 40 spacemen 40 Weightless 40 spacecrafts 40 microgravity 40 commander Peggy Whitson 40 pressurized cabin 40 shuttle 40 commander George Zamka 39 astronauts 39 spaceman 39 celestial 39 flying 39 space shuttle 39 spacesuit 38 motion sickness 38 Kenneth Ham 38 unpowered 38 orbiting 38 astronaut Peggy Whitson 38 gliding 38 spacecraft 38 Jupiter moons 38 orbital 38 shuttle underside 38 Commander Eileen 38 vibrating 38 Soyuz rocket 37 Shuttle astronauts 37 blastoff 37 gazing 37 Bill Gerstenmaier NASA 37 flight 37 Roskosmos 37 aloft 37 Piers Sellers 37 Soyuz 37 lunar dust 37 Yang Liwei 36 Soviet cosmonaut Yuri Gagarin 36 earthly 36 hyperspace 36 Spaceship Earth 36 Atlantis 36 homeward bound 36 sub orbital 36 interplanetary 36 hang glider 36 NASA 36 Foale 36 Nasa 36 Tim Kopra 36 reboard 36 curvature 36 Mike Fincke 36 Space Station 36 Astronaut 35 Wakata 35 spaceflight 35 spacewalker 35 snug 35 Hoshide 35 heavens 35 Leroy Chiao 35 Robert Behnken 35 astral 35 ZERO G 35 airship 35 International Space Station 35 cocooned 35 Commander Peggy Whitson 35 stow 35 noiselessly 35 zipping 35 terra firma 35 Bob Thirsk 35 payload bay 35 orbit 35 alien beings 35 manta ray 35 director Holly Ridings 35 overhead compartments 35 Kaleri 35 Mike Suffredini 35 Japanese astronaut Soichi 35 saucer shaped 34 spacewalkers 34 gawking 34 swooshing 34 Earth orbit 34 Frank De Winne