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(Click for frequent words.) 67 zero gravity 65 weightlessness 57 weightlessly 56 microgravity 55 simulate weightlessness 53 Weightlessness 51 microgravity environment 50 Mars #/#-gravity 50 neutrally buoyant 50 floating weightlessly 49 parabolic arcs 49 parabolas 48 earthbound 48 float weightlessly 48 Weightless 47 glide 47 scramjets 47 parachute deploys 46 Aeroscraft 46 frictionless 46 SpaceShip Two 46 spaceship 45 middeck 45 Virgin Galactic SpaceShipTwo 45 Weightless Wonder 45 simulated lunar 45 simulated weightlessness 44 dexterous robots 44 hypersonic speeds 44 Huygens Probe 44 defying gravity 44 ZERO G 44 Soyuz landings 44 earthward 43 parabolic maneuvers 43 Curiosity rover 43 outer space 43 Kibo robotic arm 43 sub orbital 43 gravitational acceleration 43 extravehicular activities 43 untethered 43 unpressurized 43 moon #/#-gravity 43 parafoil 43 antigravity 42 tingly 42 shuttle middeck 42 Zero Gravity Corporation 42 Martian terrain 42 liquidy 42 orbital 42 unpowered 42 Wingsuit 42 lunar landers 42 duration spaceflights 42 suborbital spacecraft 42 #/#-hour descent 42 Saturnian moon Titan 42 gliders 42 Foton M3 42 dexterous robot 42 electric ion propulsion 42 spaceward 42 levitated 41 simulates weightlessness 41 SpaceShipOne 41 orbital maneuvering 41 simulated Martian 41 pressurized spacesuits 41 Ares IX rocket 41 Vomit Comet 41 Kavandi 41 extravehicular 41 Novespace 41 SpaceLoft XL rocket 41 vomit comet 41 VSS Enterprise 41 Borschberg 41 exo skeleton 41 NASA Weightless Wonder 41 moondust 41 Zero Gravity 41 microgravity experiments 41 Alexander Samokutyayev 41 Foundation Weightless Flights 41 hypersonic flight 41 spacecraft 41 reentry capsule 41 SOLO TREC 41 sailplane 41 astronaut 41 Foton M2 41 trapezes 41 wingsuit 41 massless 41 Kliper 40 Shuttle Landing 40 ethereal 40 Dominic Gorie 40 Microgravity 40 bathysphere 40 Spacehab module 40 gliding 40 aquanauts 40 supersonically 40 Virgin Galactic unveils 40 director Annette Hasbrook 40 sideslip 40 otherworldly 40 planetary surfaces 40 teleportation 40 hang glider 40 Manned Maneuvering Unit 40 pressurized rovers 40 lightness 40 VTOL 40 acrobatic maneuvers 40 suborbital flight 40 Space Station 40 microrobot 39 instrument calibrations 39 SpaceShipTwo 39 3Dconnexion 3D mice 39 exoskeletons 39 sculpturally 39 EPOXI mission 39 ultracold atoms 39 ion propulsion 39 vibrating 39 IBEX spacecraft 39 Mars# 39 formless 39 stratospheric balloon 39 ballet barre 39 Wallops Island Va. 39 Konstantin Feoktistov 39 electrostatics 39 spaceflight 39 claustrophic 39 Cargo Ship Docks 39 airsick 39 stubby wings 39 starscape 39 reusable spacecraft 39 haptic device 39 unpowered glider 39 ripply 39 ice cream tubby 39 Shuttle Launch Experience 39 astronaut Piers Sellers 39 Terrier Orion 39 Crawler Transporter 39 ballistic trajectory 39 retroreflector 39 Phobos Grunt 39 aquanaut 39 NEEMO 39 Russian cosmonauts Andrei Borisenko 39 floating weightless 39 Barry Butch Wilmore 39 airless 39 commercial spaceline 39 payload bay 39 Human Spaceflight Microgravity 39 midair 39 specially instrumented 39 Tinkertoy 39 geosynchronous orbit 39 Kapton tape 39 rubbery 39 MZ 3A 39 rocket SpaceShipTwo 39 MARSIS instrument 39 postflight 39 comet flyby 39 shuttle Atlantis undocked 39 lifting barbell 39 humanlike robot 39 spacesuit 39 Zero Gravity Corp. 39 quadrocopter 39 SpaceX Dragon 39 Martian arctic 39 Lt. Col. Yang Liwei 39 Earth orbit LEO 39 geo synchronous 39 ionise 39 hypervelocity 39 aerobraking 39 eliptical 39 stretchy 39 whirlybird 38 astronauts 38 Byron Lichtenberg 38 glider 38 MESSENGER spacecraft 38 Jupiter Ganymede 38 Commander Pam Melroy 38 orbital insertion 38 thick viscous 38 wild blue yonder 38 lunar surface 38 Mars landers 38 Andre Borschberg 38 raven tresses 38 Orion spacecraft 38 robotic rover Spirit 38 Manyapu 38 Heidemarie M. 38 cosmonaut 38 Yves Rossy 38 Esrange 38 graphene sheet 38 spacecraft SpaceShipTwo 38 graceful arcs 38 pliés 38 GEochemistry 38 spherical 38 lander rover 38 O OREOS 38 transonic 38 dirigibles 38 unstowed 38 LOCAD PTS 38 spinning gyroscope 38 juggling clowning 38 earthwards 38 Peter Diamandis 38 macroscopic objects 38 aboard Skylab 38 gossamer wings 38 gimbal 38 Earth orbit 38 Spacewalker 38 Zero Gravity Flight 38 Atlantis Undocks From 38 robotic 38 airship 38 pure exhilaration 38 floaty 38 unpowered landing 38 Soviet cosmonauts 38 parabolic trajectory 38 awkard 38 orbiting 38 xenon propellant 38 etheric 38 SCUBA diving 38 airfoils 38 Parrot AR Drone 38 bungees 38 Venusian atmosphere 38 Shuttle Docks 38 spacecrafts 38 lunar landings 38 ionized molecules 38 ferry SpaceShipTwo 38 cosmos 38 Kazakhstan steppes 38 defies gravity 38 Jing Haipeng 38 spacesuits 38 Pilot George Zamka 38 mylar 38 suborbital 38 Astronaut Leroy Chiao 38 cosmonauts 38 Robonaut 38 Rutan SpaceShipOne 38 NASA Microgravity 38 ion thrusters 38 Bosu ball 38 commander Zhai Zhigang 38 weightless Hawking 38 Mars rovers Spirit 38 Jukari Fit 38 Schubertian 38 spacey 38 Nasa astronaut 38 jet propulsion 38 thruster firings 38 graspable 38 SUGAR Volt 38 swanlike 38 ARCTUS 38 Kenneth Bowersox 38 Lunar Module 38 perform microsurgery 38 outerspace 38 albedo reflectivity 38 ramjets 38 protruding filler 38 parachutes malfunctioned 38 crewed spacecraft 38 diaphanous 38 SolarEagle 38 luna moth 38 levitates 38 levitation 38 unmanned probes 38 circular orbits 38 Shuttle Endeavor 38 Canada PW#A engines 38 gravities 38 autorotation 38 moonwalkers 38 moonlike 38 bulky spacesuits 38 Venus Climate Orbiter 38 SpaceShip One 38 spacewoman 38 Roller coasters 38 aeroshell 37 teleoperated 37 aerial silks 37 laminar flow 37 terra firma 37 photoreal 37 hyperspace 37 Karen Nyberg 37 RoboSwift 37 propulsion 37 elasticized 37 Shenzhou spacecraft 37 deathlike 37 dreamlike 37 icy moons 37 en pointe 37 sticklike 37 landing VTOL 37 dust mote 37 DragonLab 37 Spacewalking 37 ISS robotic arm 37 thrusters 37 sways gently 37 inert 37 NASA vomit comet 37 bi axial 37 Bjarni Tryggvason 37 hypersonic 37 plotless 37 untoned 37 parachutes 37 subsurface scattering 37 kinesis 37 #/#-hour spacewalk [001] 37 HB SIA 37 delta winged 37 Kenneth Ham 37 Cape Canaveral Fla. 37 paramecia 37 centrifugal force 37 Fulmor 37 bacterium Bacillus subtilis 37 elastic cord 37 Apollo Skylab 37 supersonic combustion ramjet 37 Nicollier 37 spacesuit gloves 37 astronauts Jing Haipeng 37 Marc Rayman 37 footwork spins 37 Northrop Grumman Weightless Flights 37 underwater 37 bungee 37 shuttle underbelly 37 ammonia flakes 37 glassy 37 shuttle orbiter 37 Elliptical machines 37 aqualung 37 astronautical 37 sailplanes 37 Star Trek Holodeck 37 Opportunity rovers 37 Aircruise 37 deorbit 37 Gene Cernan 37 martian atmosphere 37 WK2 37 gingerly unstrapping himself 37 WISE spacecraft 37 immobile 37 Watsu 37 lunar module pilot 37 defy gravity 37 ultracold temperatures 37 Space Shuttle Atlantis 37 atomic lattice 37 Scramjets 37 Huygens descent 37 tactile sensation 37 pulse quicken 37 mothership WhiteKnightTwo 37 orbiters landers 37 gimbaled 37 bungie cords 37 Rebecca Bresnik understandably 37 tactility 37 Deep Impact flyby spacecraft 37 gravity defying 37 particle acceleration 37 Pete Siebold 37 SpaceShipTwo SS2 37 commander Leroy Chiao 37 lotus leaf 37 LocoRocos 37 effortlessly glide 37 Daniel Tani hooked 37 spaceflights 37 Harry Potter invisibility cloak 37 Voyager spacecraft 37 Lunar Excursion Module 37 translucent 37 prelaunch preparations 37 elastic cords 37 lightspeed 37 Saturn moon 37 rebreathing 37 station Canadarm2 robotic 37 galvanic vestibular stimulation 37 NASA MESSENGER spacecraft 37 scramjet engines 37 Samokutyaev 37 interplanetary 37 orbiters Mars Odyssey 37 unpressurised 37 Martian rover 37 pointe shoe 37 Teleportation 37 X #A 37 Mission SPACE 37 parabolic 37 unridable 37 uncluttered dashboard 37 spaceships 37 wick moisture 37 jetés 37 space shuttle 37 hypnotic 37 Bernoulli principle 36 protruding strips 36 Kibo JPM JEM Pressurized 36 spherical objects 36 squashy 36 Jeff Greason 36 Commander Eileen 36 UTTR 36 Simonetta Di Pipo 36 Space Capsule 36 ornithopter 36 womblike 36 manned Shenzhou 36 flailing limbs 36 Spacewalkers Scott Parazynski 36 holodeck 36 orbital rendezvous 36 animatronic creatures 36 Kiruna Sweden 36 orbited Earth 36 Gossamer Condor 36 Nikolai Budarin 36 sweatiness 36 orbital mechanics 36 whiplike 36 comet chaser 36 tandem skydiving 36 MySims SkyHeroes 36 noodley 36 kinesthetically 36 jetpack 36 lunar equator 36 Solar TErrestrial RElations Observatory 36 Jetliners wingtips touched 36 cosmic radiation 36 Dragon capsule 36 flapless 36 Exoskeleton 36 Shuttle docks 36 Xerus 36 astral plane 36 supercooled liquid 36 sponges absorbing 36 astral 36 aboard Soyuz TMA 36 outer planets 36 Richard Branson Virgin Galactic 36 Martian orbit 36 gossamer 36 tickling sensation 36 Flybar 36 NASA Mars rover 36 gimbals 36 Rayleigh scattering 36 Susan Kilrain 36 Shuttle astronauts 36 SpaceshipTwo 36 spacefaring 36 interplanetary spacecraft 36 hydrogen isotopes 36 cashier Ashley Woloszyn 36 spherical shapes 36 water striders 36 shuttle missions 36 asteroid Eros 36 interplanetary voyage 36 Red Bull Stratos 36 trapezing 36 elongates 36 microscopic spores 36 tingly sensation 36 orgasmic 36 untwist 36 magnetic dipole 36 Star Trek holodeck 36 Astronaut Danny Olivas 36 non Newtonian fluids 36 telemetry instrumentation 36 Nasa Mars Reconnaissance 36 robotic explorer 36 Flight Engineer Suni 36 relativistic particles 36 Shannon Lucid 36 Fincke radioed 36 matter antimatter annihilation 36 simulated microgravity 36 robot locomotion 36 supercold 36 badminton shuttlecock 36 puffy clouds 36 International Space Station 36 Extra Vehicular Activity 36 wingsuits 36 indoor skydiving 36 unbound 36 Mars# experiment 36 spacewalks 36 skydiving bungee jumping 36 irregularly shaped asteroid 36 retrorockets 36 soft pillowy 36 Magnetic levitation 36 absentminded professor 36 urine recycler 36 duration spaceflight 36 ESA Huygens probe 36 wave particle duality 36 Svetlana Savitskaya 36 cosmonaut Fyodor Yurchikhin 36 breathing supersonic combustion 36 narcosis 36 Joel Sitz project 36 William Gerstenmaier NASA 36 autonomous rendezvous 36 Rosetta spacecraft 36 un tethered 36 Soviet cosmonaut Yuri Gagarin 36 Saturn moon Mimas 36 lunar missions 36 relativistic 36 robotic Canadarm 36 radioisotope thermoelectric generator 36 blissful 36 Sirangelo 36 Biplane 36 comet particles 36 spacemen 36 levitate 36 Daniel Sacotte ESA 36 inchworm 36 Mojave Spaceport 36 knackering 36 unself conscious 36 gyrocopters 36 simulate 36 toned thighs 36 emits photon 36 contraptions 36 twin fuselages 36 Canadarms 36 Vassilis Angelopoulos 36 moonbase 36 THEMIS Images 36 orbit 36 taikonaut 36 Space Shuttle 36 spaceplane 36 hoola hoops 36 ballistic parachute 36 VMS Eve 36 astronaut Rex Walheim 36 ESA astronaut Christer 36 Stefanyshyn Piper 36 engineer Sandra Magnus 36 SpaceShip 36 nanosheets 36 gravity defying tricks 36 plasticy 36 ionized 36 aliveness 36 Mars Pathfinder lander 36 haptic interface 36 SpaceX Dragon capsule 36 ethereality 36 Inhale deeply 36 WhiteKnight Two 36 Gorie 36 springy 36 vapor mist 36 Airkix 36 Ares IX 36 Meridiani plains 36 astral projection 36 bungee rope 36 parabola shaped 36 elliptical 36 inter planetary 36 Solar Impulse HB SIA 36 scramjet propulsion 36 watercolor washes 36 Stretchy 36 Bob Thirsk 36 piconewtons 36 ultraprecise 36 drogue parachute 36 electrothermal 36 chemically bonded 36 twin rover Spirit 36 lunar landing 36 petrifying 36 Valentina Tereshkova 36 Yum Dingers 36 basilar membrane 36 Gyroscopic 36 Space Shuttle Orbiter 36 hypobaric chamber 36 Martian plains 36 simulates 35 Cuzzupoli 35 Maglev trains 35 dimensional visualization 35 Cosmodrome 35 bosonic 35 earthlike 35 weedless 35 Branson Virgin Galactic 35 Canadian Julie Payette 35 Altair lunar lander 35 nanomesh 35 pogo sticks 35 invitees splashed 35 laminar 35 vertical stabilizers 35 AR.Drone 35 Suborbital 35 Kounotori 35 spatially coherent 35 MPLM 35 Stardust capsule 35 Mars Opportunity rover 35 Huygens probe 35 terraforming Mars 35 gravitational 35 whisp 35 seasick 35 colloidal particles 35 daddy longlegs 35 SpaceX Falcon 9 35 spine tingle 35 fiery reentry 35 illusionistic 35 orbiter Atlantis 35 NASA twin rovers 35 roadable aircraft 35 Virgin Galactic WhiteKnightTwo 35 breathable oxygen 35 bungee cords 35 dirigible 35 jiggle 35 futuristic 35 lunar dust 35 shuttle Atlantis astronauts 35 strap ons 35 planetarium dome 35 jiggly 35 circumlunar 35 countdown dress rehearsal 35 lego bricks 35 spins spirals 35 unpowered glide 35 AntiGravity 35 treadmill stationary bike 35 translucently 35 Aerostats 35 Russian crewmate Yuri 35 planetary Transits 35 watery depths 35 interstellar 35 macroscale 35 superstrong 35 airtight lid 35 vibrate 35 sensually 35 faraway planets 35 Yuri Shargin 35 double bladed paddle 35 LEGO bricks 35 pushups situps 35 repulsor 35 cumulus clouds 35 veteran spacewalker 35 SkyScreamer 35 Rick Searfoss 35 SPACE STATION 35 NASA Stardust spacecraft 35 Eileen Collins 35 whirlpool jets 35 EZ Rocket 35 orbital module 35 Commander Rick Sturckow 35 André Borschberg 35 subatomic 35 tethered balloon 35 ISS Expedition 35 Russian Mikhail Tyurin 35 bioelectric 35 nothingness 35 spacetime 35 DEPTHX 35 martian landscape 35 motionless 35 sub orbital spaceflight 35 suit waterproof coveralls 35 Skylab 35 lavender scent 35 Ballbot 35 humanlike 35 Astronaut Gregory Chamitoff 35 Viscoelastic 35 neutron spectrometer 35 tactile feedback 35 Stratellite tm 35 NASA rovers 35 hypergolic 35 spaceliner 35 pneumatically 35 Orbital Module 35 situ measurements 35 #kt #km h 35 station Quest airlock 35 Foro Italico gusty winds 35 Hubble orbits 35 George Zamka 35 graphite epoxy 35 Chiaki Mukai 35 gyroscopic 35 Nasa spacecraft 35 thermos bottle 35 Orion Ares 35 Foale 35 hydrodynamic 35 altitude airspeed 35 primordial soup 35 Dr. Mae Jemison 35 trapeze 35 Hale Bopp comet 35 tumbleweed rover 35 Astronaut Sunita Williams 35 colonize Mars 35 Necker Nymph 35 Kaleri 35 SCUBA gear 35 tippets 35 Lunar Rover 35 isometric contractions 35 oblate spheroid 35 Twittering invitees 35 spacewalking 35 OSTM Jason 2 35 diamagnetic 35 gradiometer 35 sequined tights 35 director Holly Ridings 35 whirling centrifuge 35 Bill Gerstenmaier associate 35 levitating 35 polymorphous perversity 35 starshade 35 Alexei Leonov 35 unstow 35 Indoor Skydiving 35 supersonic 35 thermal updrafts 35 Bernoulli Principle 35 maritime subsurface 35 sensory deprivation tank 35 light refracting 35 spin webs 35 Lunar Module Pilot 35 Gs 35 bipedal locomotion 35 technologically mediated 35 BioSuit 35 Muons 35 nanometric 35 balsa wood 35 Discovery undocked 35 visco elastic memory 35 martian surface 35 dissected frog 35 polystyrene beads 35 orbiting complex 35 eggbeater 35 Stratellite 35 deorbiting 35 Russian crewmate Salizhan 35 uncrewed 35 suborbital spaceflight 35 Space Shuttle Endeavor 35 Koichi Wakata 35 robotic rover 35 Orbiter 35 nipple tassles 35 effortless 35 unnatural 35 multicolored balloons 35 twinkling stars 35 Apollo lunar 35 Pegasus XL 35 MISSE 35 FASTSAT 35 Psychological profiling 35 Stardust spacecraft 35 transportive 35 Vitaly Davydov deputy 35 Tropospheric Emission Spectrometer 35 Mars rovers Opportunity 35 sensuous curves 35 tipped precariously 35 Space Elevator 35 carbon nanotube composite 35 Moshner 35 magnificent desolation 35 Squyres Cornell 35 biomorphic shapes 35 simulating 35 creaseless 35 Dr Ehrsson 35 LRO LCROSS 35 elongated orbit 35 limberness 35 Soyuz rocket 35 MER rovers 35 Orlan suits 35 simulating weightlessness 35 elastic 35 lily pad 35 extravehicular mobility units 35 unearthly 35 LSAM 35 Soyuz capsule 35 planktonic 35 cork screw 35 Aerogels 35 chemically reactive 35 swim bladders 35 aerobic anaerobic 35 glowing orb 35 superhydrophobic 35 motorized gliders 35 squishy 35 cigar minnow 35 manta ray 35 Gossamer Penguin flew 35 astronautics 35 cosmonaut Yuri Gagarin 35 commander George Zamka 35 evanescent 35 Space shuttle Atlantis 35 bungee chords 35 exoskeletal 35 spaceflight participant 35 heli deck 35 jerky movements 35 ST5 35 vertiginous 35 Shenzhou VII spacecraft 35 Mamoru Mohri 35 unpiloted 35 Manned Spacecraft Center 35 electrically conducting 35 ripcord 35 lunar module Eagle 35 Helios Airways Flight ZU# 35 Peter H. Diamandis 35 sterile 35 shuttle underside 35 skydive 35 asanas poses 35 orbital spaceflight 35 veteran spaceflyer 35 Ron Garan 35 ooh ahh 35 Mobius strip 35 ethereally 35 caulk gun 35 tethered 35 kinesthetic 35 hexapod 35 suborbital trajectory 35 arid Kazakh steppe 35 Orbital Outfitters 35 ARGUS IR 35 liftoffs 35 downstroke 35 repelling magnets 35 Apollo missions 35 Slinkies 35 interplanetary missions 35 ESA GOCE 35 starboard truss 35 overrotated 35 orb 35 satiny smooth 35 Abigail Mae 35 robotic arm 35 stationary lander 35 glide effortlessly 35 Dryden Flight Research 35 asteroid Itokawa 35 Dryden Aircraft 35 haptic 35 silken threads 35 Haise 35 Mylar 35 exoskeleton 35 slimy smelly layer 35 visco elastic foam 35 Spacesuit 35 vertical takeoffs 35 Spaceship Earth 35 Hackensack NJ Schirra 35 Telenoid 35 Plane OSP 35 scramjet engine 35 Shuttle Discovery blasts 35 sidestick 35 gamelike 35 airspeeds 35 DMSP F# 35 shuttlecock shaped capsule 35 orbiter lander 35 Centennial Challenges 34 Jerrie Cobb 34 limbs flailing 34 Kazakh steppe 34 Russian cosmonaut Yuri Usachev 34 dizzy nauseated 34 lunar module descent 34 Space Shuttle Discovery 34 Earth asteroid Itokawa 34 omni directional 34 ancient lakebed awash 34 tulles 34 hummingbird wings 34 Gravitron 34 rebreather 34 Wakata 34 lunar simulant 34 femtosecond laser pulses 34 Spacewalks 34 amazingly lifelike 34 seemingly weightless 34 ballon 34 planet gravitational tug 34 Advanced Diagnostic Ultrasound 34 pressurized cabins 34 pneumatic catapult 34 weblike 34 subsonic 34 Saturn moons Titan 34 outercourse 34 insectlike 34 bodily contortions 34 Brazilian Marcos Pontes 34 Bose Einstein condensate BEC 34 Charles Hobaugh 34 UP Aerospace 34 Satcher Jr. 34 claustrophobic 34 cobalt atom 34 Monitoring System ISMS 34 lipless 34 tactile 34 wormholes 34 treadles 34 orbiter