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(Click for frequent words.) 71 NASA Weightless Wonder 65 vomit comet 63 Vomit Comet 62 Foton M3 62 Suborbital 61 simulate weightlessness 61 G FORCE ONE 61 Foton M2 61 Manned Flight 61 Operation IceBridge 60 spacecraft SpaceShipTwo 60 Interior Laboratory GRAIL 59 SpaceshipTwo 59 NASA Stratospheric Observatory 59 parabolic maneuvers 59 HIAPER 59 SolarEagle 59 reusable spacecraft 58 Boeing #SP 58 NASA vomit comet 58 Infrared Astronomy SOFIA 58 SpaceShip Two 58 DragonLab 58 uncrewed 58 Shuttle Docks 58 Reduced Gravity 57 Orbital Express 57 suborbital spacecraft 57 Novespace 57 EZ Rocket 57 windshield wiper maneuver 57 Atlantis Undocks From 57 Dryden Aircraft 57 Virgin Galactic SpaceShipTwo 57 SpaceShipTwo SS2 57 Foton M3 mission 56 NASA Reduced Gravity 56 hypersonic scramjet 56 NASA Microgravity 56 Pete Siebold 56 STSS Demo 56 Dan Durda 56 Launch Scrubbed 56 HC #J 56 Shuttle Endeavor 56 hypersonic glider 56 SpaceLoft XL rocket 56 Educator Astronauts 56 Space Shuttle STS 56 SpaceShip One 56 High Altitude Airship 56 Launch Abort System 56 Virgin Galactic unveils 56 Vehicle CEV 56 ARCTUS 56 Pilot George Zamka 56 Cloud Aerosol Lidar 56 Solar Sail 56 experimental payloads 55 Microgravity 55 Pegasus XL 55 Curiosity rover 55 F #B STOVL 55 Dyna Soar 55 Profiler Suite OMPS 55 turbojet 55 SpaceX Dragon 55 Payloads 55 astronauts Nicole Stott 55 SpaceShip 55 O OREOS 55 nanosatellite 55 Cygnus spacecraft 55 Rocketplane XP 55 Wingsuit 55 RQ 4A 55 Terrier Orion 55 Gyrocopter 55 NASAs 55 CALIPSO 55 SpaceLoft XL 54 Jupiter Icy Moons 54 GOES O 54 Orion Launch Abort 54 Launch Vehicle 54 scramjet engines 54 Holly Ridings 54 Scramjet 54 NASA LCROSS 54 SUGAR Volt 54 Educator Astronaut 54 ramjets 54 Joel Sitz project 54 Alexander Samokutyayev 54 MC #P 54 Stratospheric Observatory 54 Manned Spacecraft Center 54 STP S# 54 unpowered glide 54 ST5 54 Venus Climate Orbiter 54 X #A WaveRider 54 MZ 3A 54 3rd SOPS 54 scramjets 54 Mars #/#-gravity 54 Diamond DA# 54 drilling vessel Chikyu 54 Launch Postponed 54 Pluto Kuiper Belt 54 motorized gliders 54 #CBi 54 Ranging spacecraft 54 long endurance HALE 54 C NOFS 54 Sounding Rocket 54 Nanosat 54 comet chaser 54 ARGUS IR 54 A#T 54 GLAST spacecraft 54 Starfighters 54 Infrared Astronomy 54 Moon Mineralogy Mapper M3 54 RQ 4B 54 reusable hypersonic 53 HyFly 53 Commander Charlie Hobaugh 53 VMS Eve 53 Soyuz TMA spacecraft 53 Foton spacecraft 53 MARCH FIELD AIR MUSEUM 53 geo synchronous 53 Crew Launch Vehicle 53 Astronaut Candidate 53 AeroShell Aerobatic Team 53 HyShot 53 Reusable Launch Vehicle 53 Air Missile AMRAAM 53 Shuttle Crew 53 aboard Soyuz TMA 53 Systems J UCAS 53 stratospheric balloon 53 WhiteKnight Two 53 CitationJet 53 Rosetta orbiter 53 VASIMR 53 dexterous robot 53 Commercial Generic Bioprocessing 53 nanosatellites 53 Titan IVB 53 Citation Excel 53 Virgin Galactic spaceship 53 NPO Lavochkin 53 Plane OSP 53 Huygens Probe 53 DMSP F# 53 LADEE 53 SUAV 53 OSIRIS REx 53 aboard SpaceX Falcon 53 X #A Waverider 53 Williams FJ# 53 hypersonic speeds 53 CubeSat 53 SpaceX Dragon capsule 53 Cassini Image 53 Satellite Successfully Launched 53 ferry SpaceShipTwo 53 O. Hobaugh 53 MetOp satellite 53 Astronaut Leroy Chiao 53 Reduced Gravity Student 53 unmanned spaceplane 53 C #H Hercules 53 Synthetic Aperture Radar 53 #th FLTS 53 Boeing #-# Intercontinental 53 Infrared Pathfinder Satellite 52 LISA Pathfinder 52 Solar TErrestrial RElations Observatory 52 Proba 2 52 microgravity 52 Nasa Goddard Space 52 Taikonaut 52 GPS 2R 52 Citation CJ4 52 Landing Facility 52 #T Hercules 52 Deep Impact eXtended Investigation 52 Coast Guard icebreaker Healy 52 engineer Timothy Kopra 52 Flyby 52 ESA ERS 52 lunar orbiting spacecraft 52 Rick Searfoss 52 Lunar Landing 52 Deep Impact Extended 52 commander Leroy Chiao 52 #kt #km h 52 IceBridge 52 EPOXI mission 52 Wedgetail AEW & 52 Pilatus PC# 52 Human Spaceflight Microgravity 52 orbiter lander 52 aborts landing 52 supersonic combustion 52 KSC Shuttle 52 Terry Virts 52 NASA Ares IX 52 Hyper X 52 WhiteKnightTwo WK2 52 Garmin G# equipped 52 probe Chang'e 52 Low Altitude 52 Dominic Gorie 52 H IIB 52 Wallops Island Va. 52 MQ 8B 52 ESA GOCE 52 airborne observatory 52 Apollo Lunar Module 52 EPOCh 52 Ozone Monitoring 52 Rosetta comet chaser 52 ion propulsion 52 NuSTAR 52 NROL 52 delta winged 52 Killer Asteroid 52 parabolic arcs 52 manned Shenzhou 52 landing VTOL 52 suborbital spaceships 52 Cessna Citation XLS 52 Space Capsule 52 Soyuz Spacecraft 52 seat Bombardier Q#s 52 breathing supersonic combustion 52 Manned Space 52 NASA Wallops 52 GSAT 5P 52 BioServe Space Technologies 52 Unmanned Aircraft System 52 OMS pods 52 SSM# 52 Foundation Weightless Flights 52 gamma ray observatory 52 Blended Wing 52 WK2 52 Astronauts Install 52 Minotaur rocket 52 Virgin Galactic VSS Enterprise 52 Macroscale Interactions during 52 NASA Spacecraft 52 Atlas 2AS 51 SB2C 51 monoplanes 51 Esrange 51 unpiloted 51 Volatile Evolution 51 microgravity experiments 51 Dream Chaser 51 MidSTAR 51 Wideband Gapfiller Satellite 51 endurance UAV 51 Astronaut Julie Payette 51 unpressurized 51 GeneSat 1 51 Neutron Spectrometer 51 towing glider 51 SPHERES 51 Walter Schirra 51 planetary Transits 51 unmanned rotorcraft 51 Bombardier Q# turboprop 51 Space Station Status 51 THEMIS Images 51 optionally piloted 51 HH #G 51 Shenzhou spacecraft 51 Lunar CRater Observation 51 HB SIA 51 Derek Hassmann 51 STOVL variant 51 Total Ozone Mapping 51 Captain Khlebnikov 51 PSLV C6 51 sub orbital 51 Commander Dominic Gorie 51 descend vertically 51 Antimatter detector 51 Samokutyayev 51 Konstantin Feoktistov 51 Oshkosh Wisc 51 Training Devices FTDs 51 CubeSats 51 Asteroid Mission 51 Space Shuttle Endeavour STS 51 ARRL AMSAT 51 spokesman Paul Foerman 51 spokesman Michael Braukus 51 OSIRIS Rex 51 Twin Otter airplane 51 spaceplane 51 veteran spaceflyer 51 NASA Space Shuttles 51 NASA THEMIS 51 Skynet 5C 51 VTOL 51 Geo synchronous 51 RQ 7B Shadow 51 E 8C 51 RoboSwift 51 SBIRS HEO 51 shuttle Endeavor 51 LTS# 51 Heterodyne Instrument 51 Reaches Orbit 51 Gulfstream GV 51 Solid Liquid Mixtures 51 Northrop Grumman Weightless Flights 51 AMASE 51 gendarme helicopter 51 Launch Vehicle EELV 51 Cargo Launch Vehicle 51 laser altimeter 51 Simonetta Di Pippo 51 Léopold Eyharts 51 crewed spacecraft 51 JIMO 51 Gas Chromatograph Mass Spectrometer 51 Orion Crew 51 Advanced Diagnostic Ultrasound 51 André Borschberg 51 Minotaur IV 51 Aeroshell 51 NOAA GOES 51 SkySat 51 Mars rovers Opportunity 51 PW#A 51 orbital rendezvous 51 ARES IX 51 Rockot 51 Scrubs Shuttle Launch 51 Mars Reconnaissance Orbiter MRO 51 Orbiter MRO 51 Air Refueling 51 Roberto Vittori 51 Nicollier 51 aircraft Solar Impulse 51 Lunar Lander 51 Blackswift 51 CAMCOPTER ® S 51 Avro RJ# [002] 51 simulates weightlessness 51 Thermal Emission Spectrometer 51 Planetary Transits 51 Commander Pam Melroy 51 MKV L 51 microgravity environment 51 XCOR Lynx 51 Sirangelo 51 ILS Proton Breeze 51 turbojets 51 Mars Pathfinder lander 50 Shuttle Carrier 50 SMEX 50 Astrogenetix 50 Hinode satellite 50 Navy Unmanned Combat 50 Geeky tweeters 50 B#NG 50 aimless nobodies 50 Vertical Landing 50 Kliper 50 Osprey tiltrotor aircraft 50 ExoMars Trace Gas 50 Orion spacecraft 50 Shepherding Spacecraft 50 Vehicle ATV 50 Beechcraft A# 50 Weightlessness 50 SELENE probe 50 BepiColombo 50 Martian rover 50 spacecrafts 50 Akademik Fedorov 50 X #A scramjet 50 Unmanned Aircraft 50 Pamir Airways disappeared 50 SpaceDev Dream Chaser 50 MTOW 50 Magnetospheric 50 performing aerobatic maneuvers 50 NASA Cosmic Background 50 William Gerstenmaier 50 Mars Surveyor 50 passenger Canadair Regional 50 Aeronomy 50 Ares IX rocket 50 Philae lander 50 cutter Healy 50 electric ion propulsion 50 Cessna Caravans 50 Dragon capsule 50 Freeds owned 50 AirLaunch 50 smaller turboprop planes 50 Xerus 50 Vertical Takeoff 50 STOVL aircraft 50 Boeing #-# Freighter 50 Astronauts Begin 50 George Zamka 50 J 2X rocket 50 Unmanned Combat Air 50 Manned Maneuvering Unit 50 Shallow Radar 50 Beech #D 50 unmanned probes 50 spacecraft 50 Re engining 50 Vertical Landing STOVL 50 Risky Spacewalk 50 Shuttle Endeavour docks 50 NASA GLAST 50 unpowered glider 50 Claude Nicollier 50 Gemini Apollo 50 JCSAT 9 50 GeneSat 50 PBY 5A Catalina 50 Synchronized Position Hold 50 engine turbo prop 50 irregularly shaped asteroid 50 GloPac 50 ZERO G 50 Canadair CL 50 Giove B 50 Continuity Mission LDCM 50 Norm Thagard 50 LOCAD PTS 50 Electric Propulsion 50 bipropellant 50 Radiation Belt 50 Space Infrared Telescope 50 ESA SMART 50 HH #C 50 Uninhabited Aerial Vehicle 50 polar orbits 50 Mini Thermal Emission 50 Max Launch Abort 50 Satellites GOES 50 Darcy Hennemann 50 Variable Specific 50 NASA Lunar Crater 50 autonomous rendezvous 50 Eurostar E# 50 Vandenberg AFB Calif. 50 entire Milstar constellation 50 gamma ray spectrometer 50 Arianespace Ariane 5 50 sailplane 50 GSLV rocket 50 Susan Kilrain 50 NEAR Shoemaker 50 Investigation DIXI 50 parachutes malfunctioned 50 Roman Romanenko 50 weightlessness 50 Pamela Melroy 50 Aircrews 50 Interorbital Systems 50 De Havilland Comet 50 STOL 50 Spacewalking 50 NASA Wallops Island 50 nEUROn 50 altitude supersonic jet 50 Manned Spaceflight 50 Nasa Mars Reconnaissance 50 Kim Shiflett 50 ScanEagle unmanned aircraft 50 AC #U 50 Bombardier CRJ #s 50 engineer Nicole Stott 50 Predator UAV 50 MC #J 50 comet flyby 50 Postpones Launch 50 Peter Diamandis founder 50 Russian cosmonauts Andrei Borisenko 50 King Tut chariot 50 B# #F 50 stratospheric airship 50 Titan 4B 50 NASTAR Center 50 MC #E 50 Crew Prepares 50 SpaceShipOne rocket 50 sub orbital spaceflight 50 somersaulting maneuver 50 VTOL vertical 50 vertical takeoff 50 neutron spectrometer 50 landing CTOL 50 pusher propeller 50 Divine Vessel 50 unpiloted aircraft 50 H IIA 50 IBEX spacecraft 50 Extra #S 50 TDRS K 50 Aerobatic 50 Technology Demonstrator 50 ISRO Chandrayaan 50 seater ATR 50 Exploration Vehicle 50 Beechjet #A 50 Kavandi 50 parafoil 50 triplane 50 manned spaceships 50 radio occultation 50 FASTSAT 50 Shuttle astronaut 50 Japanese Pressurized Module 50 NASA 50 Cathy Koerner 50 Satellite Launch Vehicle GSLV 50 maritime subsurface 50 Mars CRISM 50 SpaceX Falcon 9 50 TOFTs 50 Merlin 1C 50 THEMIS Image 50 Voyager piloted 50 Jupiter Icy Moons Orbiter 50 Helios 2B 50 Paragliders 50 NASA Orbiting Carbon 50 Orbital Sciences Corp 50 KC #R Stratotankers 49 geo synchronous transfer 49 NFIRE 49 Rosetta spacecraft 49 Rusty Schweickart 49 Eurobot 49 tilt rotor 49 Mars Color Imager 49 turbofan jet 49 FAA Certifies 49 Delays Shuttle Launch 49 Chris Lounderman 49 Autonomous Rendezvous Technology 49 tailbooms extending rearward 49 heavier payloads 49 General Electric GEnx 49 T #C Goshawk 49 Jeff Greason 49 Spacehab module 49 SCISAT 49 P 8A MMA 49 Scramjets 49 commander Pam Melroy 49 U 2S 49 Sikorsky X2 49 GPS IIR 49 Pres Henne senior 49 Lands Safely 49 transonic wing 49 Lunar Orbit 49 CHIPSat 49 Peter Diamandis chairman 49 Piper Warrior 49 unmanned Progress 49 Progress resupply 49 Daniel Sacotte 49 WhiteKnightTwo mothership 49 Solar Optical Telescope 49 LRO spacecraft 49 André Kuipers 49 Space Station 49 Suite VIIRS 49 journal Acta Astronautica 49 Jules Verne ATV 49 Lunar Exploration 49 Cargo Aircraft 49 Shuttle Endeavour undocks 49 Orion Ares 49 GIV SP 49 Chandrayaan II 49 King Air B#GT 49 Presidential Helicopter 49 #SP [002] 49 Cosmic Radiation 49 Jetman 49 satellite Giove 49 mothership WhiteKnightTwo 49 PASSUR Aerospace owns 49 Spacesuit 49 Jules Verne Automated Transfer 49 Mars Orbiter 49 PBY Catalina 49 Effectiveness Directorate 49 Space Shuttle Launch 49 STC'd 49 STOVL mode 49 #th Airlift Squadron [002] 49 Sacred Vessel 49 WISE spacecraft 49 Mercury Redstone 49 lidar instrument 49 Nasa spacecraft 49 Orion CEV 49 Titan flyby 49 Phobos Grunt 49 Takao Doi 49 Louis Stodieck 49 Stealth Fighter 49 Mystery Object 49 LSAM 49 A-#/# 49 Pilot Terry Virts 49 ScanEagle UAS 49 WhiteKnight 49 Ares IY 49 UCAV 49 breathing scramjet engine 49 Orbiter 49 Citation XLS 49 GOES N 49 ultraviolet spectrograph 49 YES2 49 Gossamer Penguin flew 49 Honeywell IntuVue 49 Commander Rick Sturckow 49 TanDEM X 49 gyrocopters 49 Rover MER 49 Cessna Citation Mustang 49 synchronous polar 49 Laser Interferometer Space 49 SUAS 49 EarthCARE 49 polar orbiting 49 Lunar Surface 49 Boundary Layer 49 hypersonic flight 49 Joint Unmanned Combat 49 Barry Butch Wilmore 49 postflight 49 Cessna Skylane 49 Comet Hartley 2 49 director Chuck Dovale 49 PurePower PW#G demonstrator 49 extrasolar planet observations 49 Simonetta Di Pipo 49 Troposphere 49 stowaway survives 49 Dnepr rocket 49 Hawker #XPs 49 Aerial Vehicle 49 Shenzhou manned 49 VSS Enterprise 49 Waverider 49 LightSail 49 CRJ# airliner 49 Zero Gravity Corporation 49 ESA Cluster 49 Space Environment Geochemistry 49 GPS IIF 49 Ejection Seat 49 Turbo Mallard 49 NASA Ikhana 49 Kevin Kochersberger 49 unpressurized cargo 49 Falcon #LX [001] 49 unrefueled 49 twin engined aircraft 49 lbf thrust 49 KC #R 49 PARASOL 49 Yinghuo 1 49 Thruster 49 turboprop airliner 49 Oefelein piloted 49 W. Haise 49 Interplanetary Internet 49 spacecraft Shenzhou 49 De Havilland Beaver 49 Boeing #-#/# 49 Challenger CL 49 Turbo Prop 49 Space Shuttle 49 Citation CJ1 + 49 shuttle Endeavour STS 49 Pilot ejects 49 MP RTIP 49 Unmanned Ground Vehicle 49 Spaceships 49 recalled Seymour Himmel 49 Mars Atmosphere 49 Agro Jet 49 Pave Hawk 49 paramedic Mickey Lippy 49 Spirit stealth bomber 49 Cirrus SR#s 49 Virgin Galactic WhiteKnightTwo 49 ScanEagle UAV 49 moon #/#-gravity 49 Cryosat 49 Ecliptic 49 APXS 49 Flying Boxcar 49 F/A-#C 49 NASA EPOXI mission 48 Boeing #-# freighter 48 Subsonic Rotary Wing 48 Orbital Pegasus 48 Lunar Module Pilot 48 P 3C patrol 48 Substorms 48 transoceanic flights 48 Permanent Multipurpose Module PMM 48 DeHavilland 48 hypersonic jet 48 RSRMs 48 Bombardier Q# aircraft 48 VariEze 48 commander Sergei Volkov 48 Technology Demonstration JCTD 48 Atlantis undocks 48 NASA Cassini 48 Okeanos Explorer 48 airframe parachute 48 PSLV C9 48 retrorockets 48 Minotaur IV rocket 48 Wallops Flight Facility 48 Yury Malenchenko 48 Atlas IIAS 48 ballistic trajectory 48 C 5M 48 AIRSS 48 Required Navigation Performance 48 manned lunar missions 48 Beechcraft #D 48 Capt. Uriah Orland 48 MARSIS radar 48 Miss Veedol 48 origami masters 48 Frederick Sturckow 48 Thales Alenia 48 Akihiko Hoshide 48 KAGUYA 48 open cockpit biplane 48 Shuttle Discovery undocks 48 ESA ASI 48 Diviner Lunar Radiometer Experiment 48 transonic 48 MErcury Surface Space ENvironment 48 pilot ejects 48 Recovery Experiment SRE 48 Unmanned Aerial Vehicle 48 Starchaser 48 Mojave Spaceport 48 Barry Wilmore 48 Byron Lichtenberg 48 CATBird 48 Mars Climate Sounder 48 ESA Astronaut 48 research ship Hiialakai 48 payloads 48 Tryggvason 48 Herti 48 Bjarni Tryggvason 48 Foxbat 48 suborbital flight 48 X #A 48 circumlunar 48 RQ 4N 48 Garmin G# integrated 48 THEMIS mission 48 manned orbital 48 Osprey tiltrotor 48 shuttle Discovery STS 48 UA# 48 NASA MESSENGER spacecraft 48 tandem rotor 48 Shuttle Foam 48 Shuttle Landing 48 KC #J 48 silver colored astrovan 48 turboprop airplanes 48 Problem Lands Safely 48 UND Aerospace 48 engineer Fyodor Yurchikhin 48 Required Navigation Performance RNP 48 Russians Alexander Kaleri 48 Grumman Albatross 48 landing CTOL variant 48 lunar landers 48 Antenna LISA 48 thrust vectoring 48 Loretta Hidalgo Whitesides 48 STORRM 48 X ray Telescope XRT 48 Aboard Endeavour 48 Academician Fyodorov 48 ULA Atlas 48 F. Readdy NASA 48 Helios Prototype 48 Applied Physics Lab 48 THEMIS spacecraft 48 Bombardier DHC 8 48 Convection Rotation 48 Grob #E light 48 Turbulence injures 48 Thales avionics 48 Daniel Sacotte ESA 48 GLAST telescope 48 EPOXI spacecraft 48 Silver Dart 48 ATV Jules Verne 48 Aquarius SAC 48 Super Stallion 48 Hawk Mk 48 Skytypers 48 Orion Spacecraft 48 Situ Resource 48 interplanetary missions 48 A#T Hummingbird 48 Lifts Off 48 Solar Arrays 48 SSJ# 48 Shuttle Discovery docks 48 Martian rovers 48 Bombardier Dash #-# 48 cruising altitudes 48 ENose 48 Tactical Tomahawk 48 Space Shuttle Endeavor 48 DACT 48 Biomedical Problems 48 Pave Hawks 48 Vision SJ# 48 P Churyumov Gerasimenko 48 seat Canadair 48 astronomically overpriced 48 Dreamliner ZA# 48 rover Sojourner 48 Soyuz #S 48 MESSENGER spacecraft 48 Mars Pathfinder 48 Pam Melroy 48 L. Behnken 48 Ala. Roanoke Dazzle 48 Impactor 48 seat CRJ #s 48 Cessna Citation CJ3 48 Chetak helicopters 48 scramjet engine 48 Commander Sergei Volkov 48 gradiometer 48 MC #W [001] 48 KIAS 48 8I 48 Shuttle Astronauts 48 Fregat upper stage 48 UH 1N 48 X ray Spectrometer 48 MUSES C 48 Virgin Galactic Spaceship 48 Roughrider Honor 48 Ngo Anh 48 Scaled Composites SpaceShipOne 48 radar altimeter 48 Terry Queijo 48 Commander Alexander Skvortsov 48 Zero Gravity Corp. 48 Teh Teh 48 ISS crewmember 48 Neutral Mass Spectrometer 48 turbojet powered 48 Spy Satellite 48 pressurized module 48 Cooperative Avionics 48 A# spacecraft 48 NanoSail D 48 KC #A [001] 48 Alexey Sitev 48 Pete Theisinger 48 Observatory SDO 48 Mike Melvill 48 Air Force Evolved Expendable 48 Concorde supersonic 48 ESA CNES 48 Joint Expeditionary Force 48 Mission SRTM 48 Tam Linhas Aereas 48 Spaceguard Survey 48 OSTM Jason 2 48 C #J Joint 48 Characterization EPOCh 48 refuel fighter jets 48 Continental Connection commuter 48 Supersonic Combustion Ramjet 48 Alphasat 48 Endeavour STS 48 Tilt Rotor 48 AE #A# 48 Lunar Crater 48 Commander Dick Scobee 48 Honeywell TFE# 48 Ares rocket 48 Lockheed Martin Skunk Works 48 Stearman bi 48 Stratellite 48 NAVSTAR Global Positioning System 48 A#B# 48 Nairashvili 48 simulated lunar 48 Lunar Precursor Robotic 48 BQM #E 48 Virgin Galactic spaceliner 48 JDEM 48 Airspeed 48 4th Spacewalk 48 Delays Space Shuttle 48 Express AM# 48 Masten Space Systems 48 Triple Quadrupole 48 Advanced Microwave Scanning 48 Hawk Mk# 48 HC #A 48 SpaceX Falcon 48 xenon propellant 48 Solar Impulse HB SIA 48 Jiaolong 48 astronaut Pam Melroy 48 AeroShell 48 5B Galaxy 48 specialists Lisa Nowak 48 C 5Ms 48 Unmanned Aerial 48 CJ2 + 48 Grumman Mallard 48 Kazakhstan Baikonur Cosmodrome 48 Deke Slayton 48 Closest Approach 48 HH 1N Huey 48 Shuttle Astronauts Prepare 48 Dryden Flight Research 48 RQ 4B Global 48 Heavy Lift 48 Extrasolar Planets 48 Aerial Refueling 48 Orbital Sciences Pegasus 48 E/A-#G aircraft 48 designated naval aviator 48 Supersonic Jet 48 Lindenburger 48 Scopio 48 SPACE SHUTTLE 48 PSLV rocket 48 suborbital spaceflight 48 Transfer Vehicle HTV 48 Hakan Svedhem 48 ornithopter 48 Fulton Eisele 48 exhaust plume 48 thruster firings 48 Shuttle 48 Constellation Ares 48 Ocean Salinity SMOS 48 GSLV D3 rocket 48 Crawler Transporter 48 engineer Oleg Kononenko 47 astronauts Zhai Zhigang 47 spaceliner 47 Commercial Reusable Suborbital 47 AAI Shadow 47 Earth orbiting satellites 47 NIAR 47 autonomous aerial refueling 47 Taxiing 47 Area Navigation RNAV 47 CH #D 47 KLM Cityhopper 47 Yakovlev Yak 47 Ocean Salinity 47 Falcon 1e 47 orbiting Kepler telescope 47 Aeronca 47 Michael Studinger 47 Mars Opportunity rover