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(Click for frequent words.) 73 weightlessness 68 microgravity 67 weightless 59 microgravity environment 58 simulate weightlessness 57 Mars #/#-gravity 54 spacesuit 53 astronaut 52 moon #/#-gravity 51 Weightlessness 51 simulated weightlessness 50 outer space 50 International Space Station 50 cosmonauts 50 weightlessly 49 astronauts 49 spaceship 49 parabolas 49 spacecraft 48 orbital 48 Virgin Galactic SpaceShipTwo 48 Astronauts 48 suborbital flight 48 Microgravity 48 spacesuits 47 Spacewalker 47 sub orbital 47 hypersonic speeds 47 floating weightlessly 47 cosmonaut Fyodor Yurchikhin 47 extravehicular 47 middeck 47 suborbital 47 sub orbital spaceflight 47 Alexander Samokutyayev 47 Nasa astronaut 47 Zero Gravity 47 Weightless Wonder 47 parabolic arcs 46 floating weightless 46 vomit comet 46 duration spaceflight 46 scramjets 46 perform microsurgery 46 extravehicular activities 46 simulated lunar 46 Mars# 46 spaceflight 46 crewed spacecraft 46 Kliper 46 spacemen 46 Novespace 46 Kavandi 46 Boris Morukov 46 Space Station 46 Foton M3 45 Koichi Wakata 45 urine recycler 45 spacecrafts 45 aquanauts 45 Curiosity rover 45 spaceward 45 Foton M2 45 motion sickness 45 cosmonaut 45 Soyuz landings 45 duration spaceflights 45 SpaceX Dragon 45 shuttle Endeavor 45 Bjarni Tryggvason 45 Kibo robotic arm 45 aboard Skylab 44 interplanetary 44 Weightless 44 Vomit Comet 44 robotic arm 44 Mars# experiment 44 ice cream tubby 44 spacecraft SpaceShipTwo 44 instrument calibrations 44 Chiaki Mukai 44 Jing Haipeng 44 shuttle middeck 44 Bob Thirsk 44 Suborbital 44 dexterous robot 44 Tyurin 44 Branson Virgin Galactic 43 orbiting complex 43 Norm Thagard 43 Robonaut 43 parachute deploys 43 Foundation Weightless Flights 43 lunar surface 43 lunar landers 43 ZERO G 43 Bigelow Aerospace 43 Charles Camarda 43 Konstantin Feoktistov 43 SpaceShip Two 43 Biomedical Problems 43 orbit 43 NASA 43 Russian cosmonaut 43 commander Leroy Chiao 43 engineer Oleg Kononenko 43 Valentina Tereshkova 43 hypersonic 43 Daniel Sacotte ESA 43 aboard Atlantis 43 station Quest airlock 43 ISS crewmembers 43 Shenzhou VI 43 Russian cosmonauts Andrei Borisenko 43 ESA astronaut 43 jetpack 43 NASA astronaut 43 postflight 43 spaceflights 43 SpaceX Dragon capsule 43 taikonaut 43 commander Sergei Volkov 43 Martian terrain 43 veteran spacewalker 42 pressurized spacesuits 42 SpaceShip One 42 lunar module 42 hypersonic flight 42 SpaceShipTwo SS2 42 space shuttle 42 astronaut Peggy Whitson 42 Astronaut 42 orbited Earth 42 Rick Searfoss 42 Virgin Galactic unveils 42 Solid Liquid Mixtures 42 Soyuz rocket 42 Orion spacecraft 42 suborbital spacecraft 42 suborbital spaceflight 42 Mir Space Station 42 flight simulator 42 unstowed 42 Vinogradov 42 O OREOS 42 Zero Gravity Corporation 42 Kaleri 42 Richard Branson Virgin Galactic 42 circumlunar 42 Astronaut Sunita Williams 42 Huygens Probe 42 Soviet cosmonauts 42 Roman Romanenko 42 Human Spaceflight Microgravity 42 Bob Curbeam 42 cosmonaut Valery Tokarev 42 Simonetta Di Pipo 42 Yuri Malenchenko 42 thruster firings 42 Shenzhou VII 42 simulated 42 Red Bull Stratos 42 Kibo module 42 Ares IX rocket 42 Gedmark 42 Shuttle Endeavor 42 Norman Thagard 42 geo synchronous 42 Naoko Yamazaki 42 reusable spacecraft 42 NASA Weightless Wonder 42 simulated microgravity 42 DragonLab 42 microgravity experiments 42 comet chaser 42 Bill Gerstenmaier associate 42 astronaut Rex Walheim 42 aboard Soyuz TMA 41 Nasa 41 Cargo Ship Docks 41 Satcher Jr. 41 Rocketplane XP 41 parabolic maneuvers 41 Mission SPACE 41 Astronaut Leroy Chiao 41 Clervoy 41 SpaceShipOne 41 Space Shuttle Endeavour 41 Shannon Lucid 41 MESSENGER spacecraft 41 comet flyby 41 Shuttle Docks 41 Vitaly Davydov deputy 41 Atlantis Undocks From 41 Infrared Astronomy SOFIA 41 Dominic Gorie 41 Peter Diamandis 41 MirCorp 41 Courtenay McMillan 41 Pilot George Zamka 41 SpaceshipTwo 41 airlock module 41 Spacewalking 41 moondust 41 LRO LCROSS 41 unpressurized 41 Lt. Col. Yang Liwei 41 deorbit 41 EZ Rocket 41 astronauts Jing Haipeng 41 De Winne 41 hypervelocity 41 NASA Microgravity 41 Space Shuttle Atlantis 41 float weightlessly 41 Wallops Island Va. 41 Judy Resnik 41 Moonbase Alpha 41 Piers Sellers 41 Earth orbit 41 simulated Martian 41 Space Shuttle Discovery 41 VSS Enterprise 41 Yury Malenchenko 41 Soyuz 41 GLAST spacecraft 41 Li Yongzhi 41 Lunar Outpost 41 Wakata 41 #/#-hour spacewalk [001] 41 rescue capsule rotates 41 Shenzhou spacecraft 41 suborbital space 41 spaceships 41 Shenzhou VII spacecraft 41 spaceflyers 41 orbiting 41 Heidemarie M. 41 Spacehab module 41 moonbase 41 Randy Bresnik 41 Nicole Stott 40 cosmos 40 Malenchenko 40 Lopez Alegria 40 Russian cosmonauts 40 aerobraking 40 Samokutyaev 40 Apollo Skylab 40 Nicollier 40 Phobos Grunt 40 ion propulsion 40 lunar landings 40 ExoMars rover 40 Krikalev 40 NASAs 40 Diego Urbina 40 unpowered glide 40 cosmic radiation 40 Shuttle Launch Experience 40 Flight Engineer Suni 40 Zero Gravity Flight 40 LOCAD PTS 40 Wingsuit 40 Saturnian moon Titan 40 Spacesuit 40 Pang Zhihao researcher 40 scramjet 40 JAXA 40 orbiter 40 shuttle orbiter 40 SpaceLoft XL rocket 40 enters lunar orbit 40 orbital spaceflight 40 ferry SpaceShipTwo 40 spacesuit gloves 40 engineer Timothy Kopra 40 antigravity 40 Apollo lunar 40 Canadarms 40 Yinghuo 1 40 Foton spacecraft 40 Russian cosmonaut Gennady Padalka 40 Mamoru Mohri 40 Apollo astronauts 40 orbiting lab 40 NM spaceport 40 OSIRIS REx 40 Greg Chamitoff 40 Yuri Shargin 40 engineer Valery Tokarev 40 Andrey Borisenko 40 astronauts Peggy Whitson 40 spacewalk 40 Karen Nyberg 40 autonomous rendezvous 40 simulates weightlessness 40 Nasa Mars Reconnaissance 40 suborbital flights 40 planetary surfaces 40 suborbital rockets 40 aboard Soyuz spacecraft 40 pressurized rovers 40 unpiloted 40 teleportation 40 astronauts Nicole Stott 40 Barry Butch Wilmore 40 shuttle underside 40 dexterous robots 40 Budarin 40 Akihiko Hoshide 40 Cosmonaut Yuri Shargin 40 Kazakhstan steppes 40 Mars CRISM 40 Takao Doi 40 interplanetary voyage 40 Cosmonaut Hotel 40 lunar orbit 40 Lopota 40 Nikolai Budarin 40 lunar landing 40 Soyuz capsule 40 Lunar Module Pilot 40 Alexei Leonov 40 Mars 40 orbiting Hubble telescope 40 Virgin Galactic spaceship 40 Lieutenant Colonel Yang Liwei 40 hypersonic scramjet 40 fellow spacewalker 40 orbital module 40 Discovery STS 40 Hayabusa 40 Leroy Chiao 40 Zero Gravity Corp. 40 Northrop Grumman Weightless Flights 40 Donald Deke Slayton 40 robotic Canadarm 40 shuttle 40 robotic 40 Biological Problems 40 Zhai Zhigang Liu Boming 40 ISS robotic arm 40 comets meteors 40 Manned Spacecraft Center 40 Alexander Kaleri 40 NASA Mars rover 40 Yury Gagarin 40 planetarium dome 40 Stardust capsule 40 nanobot 40 SPHERES 39 Hawking 39 seven windowed dome 39 OMS pods 39 NASA Stratospheric Observatory 39 Virgin Galactic 39 Mike Fincke 39 Kibo JPM JEM Pressurized 39 NASA vomit comet 39 cryogenic propellants 39 backaches headaches 39 Shuttle Endeavour blasts 39 capsule rotates 39 Huygens mission 39 Helen Sharman 39 Daniel Tani 39 SolarEagle 39 Huygens 39 tourist Guy Laliberte 39 Skylab 39 albedo reflectivity 39 Manyapu 39 Martian surface 39 Extra Vehicular Activity 39 commander Dmitry Kondratyev 39 Alexey Sitev 39 Shuttle astronauts 39 Parrot AR Drone 39 Neutral Buoyancy Lab 39 astronauts Fei Junlong 39 suborbital spaceships 39 Soviet cosmonaut Yuri Gagarin 39 station Canadarm2 robotic 39 probe Huygens 39 Charles Hobaugh 39 Lunar Module 39 Roskosmos 39 Foale 39 CDR SO 39 Felix Baumgartner 39 electric ion propulsion 39 Sirangelo 39 robotic explorer 39 Muszaphar 39 cosmonaut Yuri Malenchenko 39 tile filler 39 Jon Karkow 39 Tom Marshburn 39 lunar rover 39 Russian cosmonaut Valery Tokarev 39 Cosmonaut Yuri Gagarin 39 specially instrumented 39 lunar module pilot 39 Virgin Galactic spaceline 39 Lunar Lander 39 ballistic descent 39 spaceliner 39 windowed cupola 39 Japanese Kibo laboratory 39 ISS Expedition 39 astronaut Andrew Feustel 39 VASIMR 39 Shuttle docks 39 robot locomotion 39 uncrewed 39 fiery reentry 39 midair 39 Cosmonauts Sergei Volkov 39 Leland Melvin 39 Ron Garan 39 Space Agency 39 MPLM 39 NASA Astronaut 39 Roberto Vittori 39 Mars rover 39 carnivorous beasts 39 Tie Fighter 39 shuttle astronauts 39 earthbound 39 William Gerstenmaier NASA 39 spaceplane 39 Hayabusa probe 39 Rosaviakosmos 39 spaceflight participant 39 Russian cosmonauts Sergei Volkov 39 Shenzhou IV 39 Padalka 39 spacewoman 39 NEEMO 39 manned lunar landing 39 Deep Impact flyby spacecraft 39 SpaceShipTwo spacecraft 39 Honda Asimo 39 hypobaric chamber 39 Shuttle Endeavour undocks 39 interplanetary spacecraft 39 Japan Kibo laboratory 39 Russian Valeri Polyakov 39 Mars Lander 39 Comet Hartley 2 39 planetary Transits 39 ST5 39 Astronaut Danny Olivas 39 EPOXI mission 39 spatial disorientation 39 Alexander Smoleyevsky 39 Col. Ilan Ramon 39 simulator 39 Zhai Zhigang 39 Eyharts 39 suborbital spaceflights 39 Webb Telescope 39 Canadarm2 robotic arm 39 Tim Kopra 39 Comet Hartley 39 shuttle liftoffs 39 Soviet cosmonaut Valentina Tereshkova 39 robot 39 Stardust NExT mission 38 Manned Space 38 Taikonauts 38 Mike Sarafin radioed 38 Spacesuits 38 astral projection 38 ocean splashdowns 38 Apollo missions 38 NeuroArm 38 airship 38 inflatable planetarium 38 George Zamka 38 SpaceShip 38 aboard Soyuz rocket 38 Kirk Shireman 38 UA Lunar 38 journal Acta Astronautica 38 Dryden Aircraft 38 Mission Control 38 Dream Chaser 38 Discovery undocks 38 Esrange 38 outerspace 38 Astrogenetix 38 Terrier Orion 38 Astrolab 38 shuttle underbelly 38 levitation 38 SpaceShipTwo 38 EVA extravehicular activity 38 Fincke 38 unmanned probes 38 irregularly shaped asteroid 38 thruster 38 meteoroid 38 Sibeck 38 Joseph Acaba 38 Skylab astronaut Owen Garriott 38 Fulmor 38 RKK Energia 38 colonize Mars 38 thermos bottle 38 manned Shenzhou 38 acrophobia 38 scramjet engine 38 lunar lander 38 Russell Schweickart 38 Col. Yang Liwei 38 Starchaser 38 cosmonaut training 38 Russian Salizhan Sharipov 38 Guenter Wendt 38 Jeff Greason 38 Quest airlock 38 station airlock 38 Don Sweetnam 38 CALIPSO 38 carry heavier payloads 38 Dragon capsule 38 lander rover 38 exhaust plume 38 Rocketplane 38 Deke Slayton 38 Space Capsule 38 blastoff 38 gravities 38 Fincke radioed 38 simulate 38 Commander Pam Melroy 38 Skylab Mission 38 interplanetary missions 38 Crewmate Tracy Caldwell 38 robotic rover 38 Shenzhou VI spacecraft 38 spacewalking astronauts 38 Cosmonaut Valery Tokarev 38 Charlie Camarda 38 pressurized cabins 38 Humanoid robot 38 Edwin Aldrin 38 Svetlana Savitskaya 38 Martian arctic plain 38 director Annette Hasbrook 38 ARISSat 38 Endeavour docked 38 Alexei Krasnov 38 asteroid Itokawa 38 NASA Robonaut 38 Melvill 38 commander Peggy Whitson 38 astronautical 38 spacewalks 38 martian surface 38 Soyuz TMA spacecraft 38 Story Musgrave 38 pressurized compartments 38 Bob Behnken 38 Chandrayaan II 38 orbital insertion 38 Orbital Outfitters 38 NASA MESSENGER spacecraft 38 Educator Astronauts 38 Commander Dmitry Kondratyev 38 redock 38 Lunar Excursion Module 38 Kloeris 38 Taikonaut 38 Venus Climate Orbiter 38 gloved congratulatory handshake 38 muscle atrophy 38 spacewalking 38 BepiColombo 38 angkasawan 38 SpaceShipOne rocket 38 Northrop Grumman Lunar Lander 38 Kononenko 38 cosmonaut Alexander Kaleri 38 OSTM Jason 2 38 winged dinosaur 38 intergalactic spaceship 38 engineer Nicole Stott 38 geosynchronous orbit 38 Bowersox Pettit 38 winged spacecraft 38 Yurchikhin 38 Guy Laliberte 38 Suni Williams 38 Cosmodrome 38 Galactic Suite 38 astronaut Owen Garriott 38 lifting barbell 38 Space Shuttle Orbiter 38 shuttle Discovery STS 38 astronaut Julie Payette 38 SSETI Express 38 hydrazine thrusters 38 UP Aerospace 38 Spaceport 38 pilot Terry Virts 38 Elliptical machines 38 manned spacecraft 38 Mars Rover 38 Qi Faren 38 spaceflyer 38 Gorbunov 38 Shenzhou V 38 Dr Ehrsson 38 MARSIS instrument 38 spokesman Michael Braukus 38 onboard Chandrayaan 38 capsule 38 seven windowed cupola 38 Ken Bowersox 38 Kirk Shireman NASA 38 Stefanyshyn Piper 38 Hayabusa spacecraft 38 Spacehab 38 SuitSat 38 Shuttle astronaut 38 Nie Haisheng 38 Salizhan Sharipov 38 W. Haise 38 taikonauts 38 spacefaring 38 André Kuipers 38 Endeavour robotic arm 38 LISA Pathfinder 38 Chamitoff 38 Japanese astronaut Naoko 37 Shuttle Discovery docks 37 tardigrades 37 SpaceX Falcon 9 37 Giove B 37 Yury Lonchakov 37 Pirs module 37 Yang Liwei 37 ISS crewmember 37 engineer Sandra Magnus 37 Stardust spacecraft 37 aboard Endeavour 37 Borschberg 37 Spacewalkers Scott Parazynski 37 Nasa Jet Propulsion 37 Eileen Collins 37 nanorobots 37 Regolith 37 Russian crewmate Yuri 37 pressurized module 37 gravitational pulls 37 Martin Jetpack 37 unmanned Progress 37 YES2 37 Atlantis 37 manager Kirk Shireman 37 Saturn Cassini 37 nanosatellite 37 Maxim Surayev 37 Hoshide 37 Carolyn Wincer 37 Dr. Mae Jemison 37 Terry Virts 37 shepherding spacecraft 37 Scramjets 37 atmospheric reentry 37 Paulo Nespoli 37 Skvortsov 37 Spaceships 37 Shenzhou VI craft 37 VTOL 37 Frank De Winne 37 Bernoulli Principle 37 Ngo Anh 37 NASA twin rovers 37 reboost 37 tourist Charles Simonyi 37 tiny meteoroids 37 Eurobot 37 Peter H. Diamandis 37 Winglee 37 Baikonur Kazakhstan 37 Observatory SDO 37 commercial spaceline 37 Endeavour astronaut 37 X #B 37 shuttle Endeavour STS 37 origami masters 37 Space Shuttle Endeavor 37 microrobot 37 Earth magnetosphere 37 ear barotrauma 37 Grammier 37 Jupiter Ganymede 37 NASA rovers 37 Canadarm2 37 Liu Boming 37 orbital mechanics 37 Spacewalks 37 aquanaut 37 Space 37 Ehrsson 37 basil seeds 37 simulating 37 veteran spaceflyer 37 spacecraft Chandrayaan 1 37 specialists Lisa Nowak 37 suborbital trajectory 37 Exoskeleton 37 Itokawa asteroid 37 Skripochka 37 MySims SkyHeroes 37 Orbital Module 37 docking compartment 37 Charles Simonyi 37 earthward 37 Space Shuttle STS 37 arctic plains 37 countdown dress rehearsal 37 Exploration Vehicle 37 parabolic trajectory 37 jet propulsion 37 director Derek Hassmann 37 shuttle Discovery 37 NPO Lavochkin 37 Rusty Schweickart 37 gyroscopic 37 Spacecraft 37 director Charles Elachi 37 jetpacks 37 Agency JAXA 37 STSS Demo 37 WK2 37 commander Zhai Zhigang 37 ornithopter 37 Lunar Rover 37 astronaut Greg Chamitoff 37 Russian cosmonaut Yuri Usachev 37 Feitian 37 Commander Sergei Krikalev 37 single passenger Xerus 37 airborne observatory 37 stratospheric balloon 37 astronaut Leroy Chiao 37 Robert Behnken 37 Krikalyov 37 supersonically 37 extravehicular activity 37 protruding strips 37 Rick Linnehan 37 Planck spacecraft 37 robotic rovers 37 Russian crewmate Salizhan 37 spokesman Igor Panarin 37 xenon propellant 37 Masten Space Systems 37 micrometeoroids 37 commander Frederick Sturckow 37 ESA GOCE 37 Saturn moon Mimas 37 Claude Nicollier 37 3Dconnexion 3D mice 37 Jerrie Cobb 37 manager Alan Thirkettle 37 protruding filler 37 microbots 37 Metin Sitti 37 hypersonic missiles 37 lunar regolith 37 asteroid flyby 37 reentry capsule 37 spherical 37 Saturn moon 37 unmanned rover 37 Manned Maneuvering Unit 37 shuttle undocks 37 astral 37 Frank Borman 37 Gregory Chamitoff 37 Russian Soyuz 37 Perchonok 37 Armadillo Aerospace 37 Russian Soyuz rocket 37 VASIMR engine 37 NASA Deep Impact 37 unpressurised 37 bungee 37 builder Bigelow Aerospace 37 MISSE 37 Walter Schirra 37 Holly Ridings 37 soap bubbles 37 commander Gennady Padalka 37 Peter Diamandis chairman 37 F. Readdy NASA 37 Cryosat 37 paramecia 37 recycles urine 37 Permanent Multipurpose Module PMM 37 Nasa spacecraft 37 Japan Koichi Wakata 37 agency Roscosmos 37 airlock 37 Haise 37 terra forming 37 Andrei Borisenko 37 lunar module descent 37 starboard truss 37 Gennady Padalka 37 interstellar 37 ESA Integral 37 tourist Richard Garriott 37 Russian cosmonaut Yuri Gagarin 37 Zvezda Service 37 undocks 37 Epley maneuver 37 Wormholes 37 Mars rovers Spirit 37 astronaut Timothy Kopra 37 Atlantis undocks 37 space shuttle Discovery 37 Virgin Galactic WhiteKnightTwo 37 WISE spacecraft 37 orbit GEO 37 Bosu ball 37 manned spacecraft Shenzhou VI 37 Cosmonaut Training Center 37 Garret Reisman 37 Lunar Roving Vehicle 37 Ares IY 37 Opportunity Mars rover 37 Cathy Koerner 37 Jupiter Icy Moons 37 deorbiting 37 manned spaceship 37 Oliver Knickel 37 Space Elevator 37 Mars Color Imager 37 Japanese Kibo module 37 Stodieck 37 astronaut Charles Camarda 37 Martian rover 36 Shuttle Discovery blasts 36 shuttle payload bay 36 Saturn moons 36 manned orbital 36 Shuttle Endeavour docks 36 spokesman Paul Foerman 36 Discovery undocked 36 Sacred Vessel 36 lander 36 Eric Boe 36 PSLV C6 36 Canadian Julie Payette 36 Russian Orlan 36 CubeSat 36 Charles Elachi 36 Interplanetary Internet 36 Sandra Magnus 36 agency Rosaviakosmos 36 Russian cosmonaut Salizhan Sharipov 36 Fyodor Yurchikhin 36 So yeon Yi 36 payload bay 36 Mikhail Tyurin 36 Laboratory MSL 36 Cape Canaveral Fla. 36 weightless Hawking 36 Dottie Metcalf Lindenburger 36 spokesperson Allard Beutel 36 Pavel Vinogradov 36 cosmonaut Yuri Gagarin 36 Jean Francois Clervoy 36 Anousheh 36 Robotic Arm 36 pressurized cabin 36 iStan 36 whirling centrifuge 36 4D cinema 36 UTTR 36 Pete Siebold 36 Nasa Ames 36 Churyumov Gerasimenko 36 robotic rover Spirit 36 flyby spacecraft 36 Pam Melroy 36 wingsuit 36 unpowered glider 36 Linear Acceleration 36 Xerus 36 X #A 36 Samokutyayev 36 windshield wiper maneuver 36 Space Shuttle 36 Soyuz Capsule 36 pressurized compartments where 36 Shuttle Discovery 36 badminton shuttlecock 36 MZ 3A 36 optical illusions 36 Bill Readdy NASA 36 Rick Mastracchio 36 humanoid robots 36 Psychological profiling 36 Shattered Horizon 36 computerized mannequins 36 Astronauts aboard 36 Cady Coleman 36 Bernoulli principle 36 hypersonic jet 36 L. Behnken 36 Pedro Duque 36 Harry Potter invisibility cloak 36 micrometeorite 36 extravehicular activity EVA 36 FASTSAT 36 Susan Kilrain 36 spaceman 36 Andre Borschberg 36 DMSP F# 36 Shuttle undocks 36 hypersonic propulsion 36 Shuttle Atlantis docks 36 ENose 36 decompression sickness 36 Soyuz TMA 36 Asteroid Itokawa 36 parafoil 36 Tinkertoy 36 Aircruise 36 Mars rovers Opportunity 36 Dava Newman 36 Commander Sergei Volkov 36 WhiteKnight Two 36 Michael Zolensky 36 Shuttle Challenger 36 Gravity Probe B 36 Sergei Volkov 36 coughing sneezing laughing 36 pilot Charles Hobaugh 36 planetary geology 36 Romanenko 36 Soyuz spacecraft 36 Lunar Exploration 36 Yves Rossy 36 Red Planet 36 Mars Pathfinder 36 Gagarin flight 36 spacewalker 36 unstow 36 André Borschberg 36 Shane Kimbrough 36 Shuttle Discovery astronauts 36 Orbital Express 36 tidal bulge 36 Lunar Lander Challenge 36 Joe Acaba 36 Byron Lichtenberg 36 Commander Leroy Chiao 36 space 36 astronaut Zhai Zhigang 36 harrowing claustrophobic 36 IMBP 36 engineer Salizhan Sharipov 36 Allard Beutel NASA 36 manager Mike Suffredini 36 Daisuke Enomoto 36 Russians Fyodor Yurchikhin 36 GeneSat 36 mothership WhiteKnightTwo 36 director Holly Ridings 36 Russian Mikhail Tyurin 36 Mars Pathfinder lander 36 Dan Durda 36 parachutes malfunctioned 36 Rosetta lander 36 Gus Grissom 36 thrusters 36 ultraprecise 36 Paramagnetic Aggregates 36 Chang'eI 36 Discovery astronauts 36 Fei Junlong 36 Vostok spacecraft 36 Richard Garriott 36 Dan Tani 36 Orbiters 36 tandem skydiving 36 eliptical 36 Darcy Hennemann 36 Virgin Galactic suborbital 36 ARCTUS