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(Click for frequent words.) 68 spacecraft 66 robotic rovers 66 unmanned probes 66 Nasa spacecraft 65 robotic rover 65 orbital rendezvous 65 Mars orbiter 64 robotic lander 64 unmanned spacecraft 64 robotic explorer 63 Stardust spacecraft 63 spaceplane 63 Cassini Huygens 62 dexterous robot 62 lunar landers 62 Mars Pathfinder lander 62 crewed spacecraft 62 lander 62 Lunar Reconnaissance Orbiter LRO 62 NASA MESSENGER spacecraft 61 IBEX spacecraft 61 orbiting observatory 61 BepiColombo 61 Mars Odyssey spacecraft 61 Mars rover 61 Rosetta spacecraft 61 robotic landers 61 Messenger spacecraft 61 twin Voyager spacecraft 61 Martian rover 60 Sojourner rover 60 NASA Stardust spacecraft 60 Kepler spacecraft 60 spaceship 60 robotic explorers 60 NFIRE 60 NASA Kepler 60 probe Chang'e 60 WISE spacecraft 60 probe Huygens 60 twin rovers Spirit 60 Mars Rover 60 NASAs 60 orbiting observatories 60 robotic probes 59 Minotaur rocket 59 Galileo spacecraft 59 Mars Reconnaissance Orbiter MRO 59 Flyby spacecraft 59 orbiting spacecraft 59 remote sensing satellite Resourcesat 59 reusable spacecraft 59 orbital insertion 59 NASA Kepler spacecraft 59 SIM PlanetQuest 59 lunar explorer 59 Mars moon Phobos 59 Voyager probes 59 Jupiter Icy Moons Orbiter 59 ExoMars rover 59 Martian rovers 58 orbiting telescope 58 Earth orbit 58 Mars landers 58 planetary Transits 58 Martian lander 58 Convection Rotation 58 spacecraft Cassini 58 NASA Mars rover 58 Comet Boethin 58 Dragon capsule 58 stationary lander 58 interplanetary spacecraft 58 nanosatellite 58 rovers Spirit 58 NASA rovers 58 Mars Pathfinder 58 Mars rovers Spirit 58 Comet #P/Churyumov-Gerasimenko 58 rover Sojourner 58 twin rovers 58 lunar rover 58 JIMO 58 orbiting Saturn 58 Viking landers 58 unpiloted aircraft 58 Hubble Space telescope 58 Lunar CRater Observation 58 MESSENGER spacecraft 57 NASA Kepler telescope 57 Astrobotic 57 NASA THEMIS 57 Chang'eI 57 unmanned spaceplane 57 flyby spacecraft 57 Global Surveyor 57 satellites orbiting Earth 57 manned spacecraft 57 spacecraft orbiting 57 Martian crater 57 Orion spacecraft 57 unmanned lunar 57 MUSES C 57 Orbiter LRO 57 lunar orbiter 57 Jupiter Icy Moons 57 SPHERES 57 Hubble Space Telescope HST 57 uncrewed 57 Sensing Satellite LCROSS 57 DART spacecraft 57 orbit GEO 57 Ranging spacecraft 57 New Horizons spacecraft 57 lander rover 57 Voyager spacecraft 57 orbiters 57 infrared telescopes 57 CHIPSat 56 Mars lander 56 spacecrafts 56 lunar orbiters 56 manned lunar 56 Shenzhou capsule 56 Churyumov Gerasimenko 56 FASTSAT 56 circumlunar 56 Mars rovers 56 lunar lander 56 PSLV rocket 56 rover Spirit 56 Yinghuo 1 56 geo stationary orbit 56 Orbital Express 56 Curiosity rover 56 NASA 56 Cassini Huygens spacecraft 56 SpaceLoft XL rocket 56 PASADENA Calif. NASA 56 orbiter 56 suborbital spacecraft 56 LCROSS Lunar Crater Observation 56 unpiloted 56 Kepler Space Telescope 56 NASA Gamma ray 56 Comet Churyumov Gerasimenko 56 rover 56 satellites 56 SIRTF 56 NASA Cassini spacecraft 56 Huygens Probe 56 Solar TErrestrial RElations Observatory 56 orbiting Kepler telescope 56 highly elliptical orbit 56 Foton spacecraft 56 Lunokhod 56 NASA EPOXI mission 56 nanosatellites 56 orbiting Hubble Space Telescope 56 ion propulsion 56 orbiting Mars 55 parachutes malfunctioned 55 Huygens lander 55 geosynchronous satellite 55 orbit 55 Hubble telescope 55 Phobos Grunt 55 Lunar Roving Vehicle 55 #P/Churyumov-Gerasimenko 55 HiRISE camera aboard 55 NASA twin rovers 55 Kepler Mission 55 Interior Laboratory GRAIL 55 asteroid Itokawa 55 NASA LCROSS 55 asteroid 55 interplanetary missions 55 ray Space Telescope 55 simulated lunar 55 SpaceX Dragon capsule 55 hypersonic glider 55 spacecraft Chandrayaan 1 55 unmanned airships 55 lunar missions 55 Mars Polar Lander 55 Cryosat 55 Uninhabited Aerial Vehicle 55 manned Shenzhou 55 Mars Opportunity rover 55 NASA Stratospheric Observatory 55 ESA Rosetta 55 Infrared Astronomy 55 NASA Lunar Prospector 55 ESA Huygens probe 55 Deep Impact comet 55 infrared observatory 55 Canadarms 55 Ares IX rocket 55 robot rovers 55 unmanned 55 SpaceShip Two 55 Dream Chaser 55 Stratellite 55 experimental payloads 55 NASA Lunar Crater 55 lunar probe Chang'e 55 comet Boethin 55 rover Opportunity 55 Saturn Cassini 55 suborbital rocket 54 orbiter Cassini 54 Titan flyby 54 Reusable Launch Vehicle 54 Kurs automated 54 orbiting 54 Mars rover Opportunity 54 Spaceguard Survey 54 Orbiter MRO 54 WISE telescope 54 Kliper 54 Terrestrial Planet Finder 54 THEMIS satellites 54 Giove B 54 ST5 54 Comet Hartley 2 54 NanoSail D 54 unmanned lunar orbiter 54 Hayabusa probe 54 GSLV rocket 54 asteroid Vesta 54 spaceports 54 Red Planet 54 Cargo Launch Vehicle 54 Stardust capsule 54 Shenzhou spacecraft 54 manned lunar landing 54 NROL 54 Lunar Prospector 54 infrared telescope 54 NASA rover Opportunity 54 Phoenix Mars lander 54 Cygnus spacecraft 54 Reconnaissance Orbiter 54 NuSTAR 54 NFIRE satellite 54 Horizons spacecraft 54 Mars Reconnaissance Orbiter 54 SpaceLoft XL 54 Vehicle CEV 54 INSAT 4CR 54 hypersonic scramjet 54 Stratospheric Observatory 54 Gravity Probe B 54 Rosetta orbiter 54 moonbase 54 asteroid Steins 54 lunar orbit 54 Hayabusa spacecraft 54 geosynchronous satellites 54 Europa Orbiter 54 shuttle orbiter 54 Mars Surveyor 54 commercial spaceline 54 interstellar dust samples 54 Hubble Telescope 54 spacecraft SpaceShipTwo 54 Crew Exploration 54 Kepler observatory 54 LRO LCROSS 54 Kepler Telescope 54 SBSS satellite 54 NEOSSat 54 STP S# 54 Galileo satellites 54 PSLV C6 54 geosynchronous 54 inhabitable planets 54 impactor probe 54 Highly Adaptable Satellite 54 Opportunity Mars rover 54 EPOXI mission 54 entered lunar orbit 54 GOCE satellite 54 X #As 54 windshield wiper maneuver 53 smallest exoplanet 53 GeneSat 53 NASA STEREO 53 Synthetic Aperture Radar 53 Mars Spirit rover 53 Polar Lander 53 six wheeled rover 53 orbit insertion 53 rovers 53 scramjet 53 Saturnian moon Titan 53 OSIRIS REx 53 winged spacecraft 53 APXS 53 orbiter lander 53 DIXI 53 unmanned aerial vehicle 53 Solar Orbiter 53 Launch Abort System 53 Lunar Rover 53 Antenna LISA 53 NASA Spirit rover 53 gamma ray observatory 53 Nasa 53 extravehicular activities 53 Interstellar Boundary Explorer 53 wheeled rover 53 enters lunar orbit 53 Martian orbit 53 LISA Pathfinder 53 Spacecraft 53 Shuttle Endeavor 53 orbiting telescopes 53 planetary missions 53 GPS IIR M 53 spacecraft flyby 53 Orion capsule 53 LADEE 53 asteroid Eros 53 STSS Demo 53 Glonass M 53 manned orbital 53 THEMIS spacecraft 53 Mars Lander 53 Bonneville Crater 53 Geo IK 53 X #B Orbital 53 Planetary Transits 53 NASA rover Spirit 53 Skynet 5C 53 Mars orbiting spacecraft 53 Spirit Mars rover 53 Cassini flyby 53 CoRoT satellite 53 CALIPSO 53 highly elliptical orbits 53 planemos 53 X #B 53 Zeta Ophiuchi 53 manned missions 53 GLAST telescope 53 telescope 53 Earth orbiting satellites 53 Spirit rover 53 celestial observations 53 outer planets 53 Rosetta comet 53 lander Philae 53 ATV Johannes Kepler 53 hypersonic flight 53 spokesman Michael Braukus 53 CubeSats 53 outermost planets 53 TerraSAR X satellite 53 ESA Planck 53 durable twin rovers 53 scramjet engine 53 Mars Orbiter 53 innermost planet 53 LightSail 1 53 ESA Huygens 53 BepiColombo mission 53 MAVs 53 Lt. Col. Yang Liwei 53 comet flyby 53 flyby 53 MPCV 53 Opportunity rovers 53 polar orbit 53 Ariane rocket 53 shuttle Endeavour STS 53 Autonomous Rendezvous Technology 53 MetOp satellite 53 Taurus XL rocket 53 magnetic spectrometer 53 Xerus 53 Hubble Space Telescope 53 closest flyby 52 geo synchronous 52 hypersonic jet 52 lunar rovers 52 Lunar Orbiter 52 comet chaser 52 Helios 2B 52 SBSS Block 52 manned spaceships 52 HiRISE camera 52 landers 52 Thermal Emission Spectrometer 52 Philae lander 52 PSLV C# rocket 52 Phoenix lander 52 twin rover Spirit 52 NASA Voyager spacecraft 52 DEPTHX 52 moons Phobos 52 NASA rovers Spirit 52 Rutan SpaceShipOne 52 Mojave Spaceport 52 robotic geologist 52 Discovery undocks 52 NPO Lavochkin 52 EPOXI spacecraft 52 laser altimeter 52 preset orbit 52 visit http:/saturn.jpl.nasa.gov 52 bedrock outcropping 52 ROCSAT 2 52 LightSail 52 Hubble 52 Fermi telescope 52 Rover MER 52 Benthic Rover 52 manned lunar missions 52 interplanetary probes 52 spacecraft Hayabusa 52 Orbital Sciences Corp 52 NASA Interstellar Boundary 52 Insat 4B 52 GSLV D3 52 Cosmonaut Yuri Gagarin 52 GSLV D3 rocket 52 geostationary orbits 52 hypersonic speeds 52 Opportunity rover 52 Space ENvironment GEochemistry 52 dummy payload 52 spaceships 52 GeneSat 1 52 SpaceshipTwo 52 X ray observatory 52 polar orbits 52 SpaceX Falcon 9 52 Ocean Salinity SMOS 52 ExoMars mission 52 Cloud Aerosol Lidar 52 rover Curiosity 52 SpaceX Falcon 52 lunar probe 52 mock warhead 52 CryoSat satellite 52 JAXA 52 weather satellite TIROS 52 gravitational slingshot 52 MESSENGER MErcury Surface 52 SpaceShipTwo SS2 52 Evolution Explorer 52 LCROSS spacecraft 52 MUOS satellite 52 Kuiper Belt object 52 colonize Mars 52 Ulysses spacecraft 52 asteroids Ceres 52 Epoxi 52 Glonass satellites 52 autonomous rendezvous 52 MARSIS radar 52 High Altitude Airship 52 manned suborbital 52 GSAT 5P 52 MErcury Surface Space ENvironment 52 shuttle Endeavor 52 shuttle Discovery STS 52 twin rover Opportunity 52 mission Chandrayaan 52 Interorbital Systems 52 Enceladus flybys 52 Jules Verne ATV 52 Nasa Mars Reconnaissance 51 Michibiki 51 drogue parachute 51 irregularly shaped asteroid 51 COROT 51 Spaceguard 51 NASA Opportunity rover 51 spaceward 51 Proba 2 51 Shackleton Crater 51 space shuttle 51 geo synchronous transfer 51 microsatellites 51 Space Telescope GLAST 51 Geosynchronous 51 Earthlike planets 51 Jupiter icy moons 51 Deep Impact craft 51 Mars Orbiter Camera 51 ESA ASI 51 deorbiting 51 Titan IVB 51 NASA twin STEREO 51 BBSNews #-#-# NASA 51 Mars Odyssey orbiter 51 Investigation DIXI 51 polar orbiting 51 manned spaceship 51 Pilot George Zamka 51 supersonic combustion ramjet 51 NASA Lunar Reconnaissance 51 Earthlike planet 51 Samuel Oschin Telescope 51 electric ion propulsion 51 Mars rover Spirit 51 Orion LAS 51 Comet Hartley 51 astronomical telescope 51 O OREOS 51 Explorer WISE 51 Blackswift 51 parafoil 51 Laser Interferometer Space 51 Dyna Soar 51 Jupiter Ganymede 51 Rockot 51 Resourcesat 2 51 Virgin Galactic SpaceShipTwo 51 GIOVE B 51 Virgin Galactic unveils 51 X #A WaveRider 51 Volatile Evolution 51 Lunar Crater 51 Sensing Satellite 51 Epsilon Eridani 51 rocket thrusters 51 Manned missions 51 Express orbiter 51 Herschel Space Telescope 51 particle detector 51 Ares IY 51 GSTB V2 51 LCROSS mission 51 Atlantis robotic arm 51 Kuiper belt object 51 Martian arctic plains 51 Herschel Planck 51 space module Tiangong 51 Sacred Vessel 51 geosynchronous satellite launch 51 Saturn outermost moon 51 Globalstar satellites 51 reentry capsule 51 comet Churyumov Gerasimenko 51 Shenzhou IV 51 geostationary satellite 51 reconnaissance orbiter 51 Launch Vehicle 51 A# spacecraft 51 Upsilon Andromedae b 51 LRO spacecraft 51 Climate Experiment GRACE 51 Orbiting Carbon Observatory 51 Rosetta comet chaser 51 Deep Impact mission 51 Huygens mission 51 Infrared Pathfinder Satellite 51 International Space Station 51 TDRS K 51 TanDEM X 51 plutoids 51 twin Mars rovers 51 Cassini spacecraft 51 Earth asteroid Itokawa 51 meteorological satellites 51 George Zamka 51 alien civilizations 51 Ares rocket 51 Interplanetary Internet 51 Viking orbiters 51 geosynchronous orbit 51 HEO payload 51 INSAT 3D 51 Cassini 51 lunar module Eagle 51 orbiter Mars Odyssey 51 spacecraft orbited 51 sized planets orbiting 51 NASA MESSENGER 51 orbital maneuvers 51 jagged ridge 51 galaxy M# [001] 51 Cassini orbiter 51 Recovery Experiment SRE 51 Keck telescopes 51 Doohan ashes 51 Centaur rocket 51 Phoenix Mars Lander 51 Exploration Vehicle 51 Mars rover Curiosity 51 extraterrestrial civilizations 51 Deep Impact probe 51 Itokawa 51 COROT exo 3b 51 NASA Stardust NExT 51 Planck spacecraft 51 scramjets 51 GEochemistry 51 Infrared Astronomy SOFIA 51 Laboratory MSL 51 extrasolar 51 comet Hartley 2 51 OSIRIS Rex 51 retroreflector 50 Stardust NExT mission 50 ballistic trajectory 50 Observatory STEREO 50 Pluto Charon 50 Mars Atmosphere 50 Pluto Kuiper Belt 50 polar orbiting satellites 50 asteroid Lutetia 50 manned Soyuz 50 planets orbiting distant 50 MARSIS 50 Foton M3 50 planetoid 50 WhiteKnightTwo WK2 50 Titan flybys 50 Jet Propulsion Laboratory JPL 50 Mars northern latitudes 50 orbiting satellites 50 unpowered glider 50 autonomous robotic 50 Ofeq 50 Relations Observatory STEREO 50 Skynet 5B 50 Kosmos 3M rocket 50 Meridiani plains 50 habitable worlds 50 orbiter robotic arm 50 LRO 50 Viking Lander 50 reconnaissance satellites 50 Insat 4CR 50 Jovian moons 50 Martian landscape 50 Mars Odyssey 50 exoplanets planets 50 Shepherding Spacecraft 50 Shenzhou VI capsule 50 Orbiter 50 Col. Pamela Melroy 50 geostationary communications 50 shuttle orbiters 50 MetOp 50 Eutelsat KA SAT 50 RADARSAT 2 50 Scaled Composites SpaceShipOne 50 scramjet engines 50 lunar orbiting spacecraft 50 Climate Orbiter 50 Field Infrared Experiment 50 robotic geologists 50 Chandrayaan II 50 Zenit 3SL rocket 50 KSLV 1 50 UP Aerospace 50 Technologies SpaceX 50 Mars 50 exoatmospheric kill vehicle 50 suborbital flights 50 thruster rockets 50 Martian terrain 50 NASA Cassini 50 ion thruster 50 tumbleweed rover 50 Space Capsule 50 Plesetsk 50 PSLV C 50 orbiting Cassini spacecraft 50 Cassini Equinox 50 Cassini spacecraft orbiting 50 Martian surface 50 lunar landing 50 Satellite Launch Vehicle GSLV 50 moon landers 50 VASIMR 50 Galilean satellites 50 remote sensing satellite 50 Pegasus XL 50 lander Beagle 2 50 Minotaur IV 50 gravitational microlensing 50 Huygens probe 50 Near Infrared Camera 50 radar altimeter 50 LORRI 50 WMAP satellite 50 Kepler 9c 50 Cosmic Origins Spectrograph COS 50 microgravity experiments 50 suborbital spaceship 50 flybys 50 satellite Sputnik 50 X ray observatories 50 crewed missions 50 navigate autonomously 50 Cassini Huygens Mission 50 Keck telescope 50 arctic plains 50 STEREO spacecraft 50 NASA Mars rovers 50 Satellite Launch Vehicle 50 asteroid flyby 50 detect gravitational waves 50 Helios Prototype 50 TecSAR 50 spaceflight 50 Progress resupply 50 Saturn moon 50 COSMO SkyMed 50 Fermi Telescope 50 EPOCh 50 lunar surface 50 GSLV rockets 50 Spacewatch 50 Beta Pictoris b 50 Atlantis undocks 50 Lunar Reconnaissance Orbiter 50 SuitSat 50 GPS IIF 50 Vostok spacecraft 50 geostationary satellites 50 Taurus XL 50 Huygens descent 50 orbital observatory 50 orbital 50 retrorockets 50 Upsilon Andromedae 50 THEMIS mission 50 STSS Demonstration 50 SELENE 50 TacSat 50 unmanned aerial vehicles 50 sister rover Spirit 50 Solar Dynamics Observatory 50 moon Io 50 equatorial orbit 50 human spaceflight 50 NASA Deep Impact 50 WISE mapped 50 Space Shuttle Endeavor 50 Minotaur IV rocket 50 BLG #Lb 50 Astro E2 50 PSLV C7 50 Wallops Island Va. 50 Ranging MESSENGER spacecraft 50 MUOS satellites 50 X #A scramjet 50 lunar landings 50 SCISAT 49 exoplanetary 49 Clementine spacecraft 49 Orion CEV 49 sub orbital 49 circular orbit 49 INSAT 4C 49 GOES satellites 49 cosmic cannibal 49 Space Exploration 49 KAGUYA 49 X ray telescope 49 rocketships 49 reusable manned spacecraft 49 Russian cosmonaut Yuri Gagarin 49 Victoria Crater 49 Express AM# 49 LCROSS 49 Dnepr rocket 49 Cape Canaveral Nasa 49 hypersonic missiles 49 ExoMars 49 robot 49 GOCE 49 Automated Transfer Vehicle 49 KazSat 49 INSAT 4B 49 lunar probes 49 Japan Hayabusa spacecraft 49 SpaceX Dragon 49 GJ #b [001] 49 aboard Skylab 49 moons orbiting 49 Undocking 49 comet #P/Churyumov-Gerasimenko 49 lunar orbiter Chang'e 49 P Churyumov Gerasimenko 49 EKV 49 ARISSat 49 Shuttle Atlantis blasts 49 unmanned rotorcraft 49 Nasa Kepler 49 GLAST spacecraft 49 sunlike star 49 robotic rover Spirit 49 GSLV F# 49 Herschel telescope 49 Geo synchronous 49 Kiruna Sweden 49 Titan 4B 49 Corot 7b 49 telescope atop Mauna 49 gaseous planet 49 comets asteroids 49 SAR Lupe 49 NASA Far Ultraviolet 49 mooncraft 49 geostationary 49 orbiters landers 49 vertical takeoff 49 ATV Jules Verne 49 Planck satellite 49 ESA GOCE 49 SpaceShip One 49 lunar orbiter Chandrayaan 49 impactor spacecraft 49 Shenzhou V spacecraft 49 lunar expeditions 49 Rosetta lander 49 dexterous robots 49 geostationary earth 49 satellites orbiting 49 hexagonal mirrors 49 Orion Ares 49 JWST 49 NextSat 49 Martian arctic 49 spacecraft thrusters 49 Project Agency DARPA 49 airborne observatory 49 CAPE CANAVERAL FLORIDA 49 Comet Tempel 1 49 Thales Alenia 49 radio occultation 49 Launch Scrubbed 49 payloads 49 Rockot launch 49 WhiteKnight 49 ARRL AMSAT 49 GPS 2R 49 Lunar Reconnaissance Orbiter Camera 49 Earth Observation satellites 49 Cometary 49 WhiteKnight Two 49 Regional Spaceport 49 crawler transporter 49 spacefaring civilization 49 Wolszczan 49 earth orbiting satellites 49 Commander Charlie Hobaugh 49 Earth asteroids 49 WISE infrared 49 suborbital spaceships 49 Satellites GOES 49 SpaceDev 49 ferrying astronauts 49 Shenzhou capsules 49 unmanned rover 49 STORRM 49 airship 49 comet nucleus 49 Dominic Gorie 49 X #A Waverider 49 MidSTAR 49 manned spaceflight 49 starboard SARJ 49 interstellar particles 49 microrobots 49 Plesetsk Cosmodrome 49 Kuiper Belt Objects 49 Russian cosmonaut Alexander Kaleri 49 Iridium satellites 49 Earth objects NEOs 49 Chandrayaan 49 extrasolar planet 49 Orbital Sciences Corporation 49 Cassini flybys 49 OGLE TR #b 49 lunar exploration 49 NAVSTAR Global Positioning System 49 LEMV 49 Bulava ballistic missile 49 Fermi Gamma ray 49 Operation IceBridge 49 Mercury flyby 49 Super Scorpios 49 planets orbiting stars 49 unmanned submersibles 49 Kwajalein Island 49 spy satellites 49 Observatory SDO 49 Earth orbit LEO 49 SELENE probe 49 Mars orbiters 49 Shackleton crater 49 Lunar Crater Observation 49 Solar Sail 49 Shuttle Atlantis 49 HiRise camera 49 Apollo missions 49 alien spaceships 49 Suzaku X ray 49 Stratellites 49 diazepam pharmacy 49 SpaceX 49 remote sensing satellites 49 sub orbital spaceflight 49 Nuclear Spectroscopic Telescope Array 49 Shenzhou VI spacecraft 49 IKAROS 49 Fomalhaut b 49 mission Chandrayan 49 microshutters 49 AEHF satellite 49 autonomous robots 49 discover Fomalhaut 48 H2A rocket 48 Lunar Outpost 48 suborbital flight 48 impactor 48 hypersonic missile 48 AUVs 48 Desert RATS 48 fiery reentry 48 planet Gliese #g 48 station Skylab 48 NASA Jet Propulsion Laboratory 48 Glonass navigation satellites 48 spaceflyers 48 robotic arm 48 VSS Enterprise 48 Vinasat 48 suborbital trajectory 48 REMUS 48 GSLV F# carrying 48 WGS satellite 48 MAVEN 48 Priz AS 48 Astronaut Leroy Chiao 48 MQ 8B Fire 48 orbital velocity 48 System Block IIR 48 DigitalGlobe WorldView 48 CubeSat 48 robotic 48 Ares I. 48 Omid Hope 48 Unmanned Aerial Vehicle 48 STSS satellites 48 USVs 48 Crewmate Tracy Caldwell 48 INSAT satellite 48 exoplanet hunter 48 planets orbiting sun 48 Resourcesat 48 HB SIA 48 Sinosat 48 unmanned aircraft 48 Block IIF 48 Director Charles Elachi 48 Keck Interferometer 48 Jiaolong 48 Synchronized Position Hold 48 Subaru telescope 48 administrator Sean O'Keefe 48 Vostok 3KA 48 GOES N 48 meteoroid 48 Sun synchronous orbit 48 particle physics detector 48 Deep Impact eXtended Investigation 48 microbots 48 Fregat upper stage 48 SSETI Express 48 Stardust NExT 48 Moffet Field 48 X #A 48 Sputnik beeped 48 moon Charon 48 ESA Proba 48 Foton M3 spacecraft 48 transiting exoplanet 48 SPACECRAFT 48 Nasa Mars Odyssey 48 antisatellite weapon 48 Astronauts inspect 48 Crew Launch Vehicle 48 SpaceShipOne 48 Cryosat satellite 48 starshade 48 Hayabusa capsule 48 X ray telescopes 48 pressurized module 48 asteroids