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(Click for frequent words.) 70 Sojourner rover 66 Viking landers 66 Apollo missions 65 Mars Pathfinder lander 64 spacecrafts 64 Mars Reconnaissance Orbiter MRO 63 rovers Spirit 63 Mars landers 63 Lunar Prospector 63 Orbiter MRO 63 Viking Lander 62 NASA Cosmic Background 62 NASA Stardust spacecraft 62 NASA THEMIS 62 NASAs 62 spacecraft 62 unmanned probes 62 Lunokhod 61 Lunar Orbiter 61 Ranging spacecraft 61 Mars Orbiter 60 Hubble Space Telescope HST 60 Rosetta spacecraft 60 Voyager spacecraft 60 Nasa Mars Reconnaissance 60 Lunar Rover 60 Cosmic Background Explorer 60 Mars Rover 60 Viking orbiters 60 NASA rovers 60 Nasa spacecraft 60 Near Infrared Camera 60 Mars Surveyor 60 twin Viking landers 60 BepiColombo 60 Opportunity rovers 59 planetary Transits 59 ESA SMART 59 NASA LCROSS 59 NASA EPOXI mission 59 orbiting observatories 59 Martian rovers 59 rover Sojourner 59 NASA twin rovers 59 Convection Rotation 59 Cassini Huygens 59 Interior Laboratory GRAIL 59 rovers 59 Mars rover 59 Galileo spacecraft 58 NuSTAR 58 NASA Lunar Prospector 58 Mars rovers 58 retroreflector 58 orbiting Mars 58 NASA Voyager spacecraft 58 Earth orbiting satellites 58 lunar surface 58 GALEX 58 WISE spacecraft 58 mere fly bys 58 Kepler Mission 58 robotic spacecraft 58 Solar TErrestrial RElations Observatory 58 Relations Observatory STEREO 58 Deep Impact probe 58 Orbital Express 58 Voyager probes 58 laser altimeter 58 Multi Object Spectrometer 58 Lunar CRater Observation 58 STP S# 57 telescopic observations 57 Curiosity rover 57 Mars rovers Spirit 57 EPOCh 57 ESA Herschel 57 Lunar Reconnaissance Orbiter LRO 57 robotic explorer 57 APXS 57 HiRISE camera aboard 57 NASA Kepler telescope 57 Solar Dynamics Observatory 57 Mission SRTM 57 NASA Kepler 57 Sojourner Rover 57 NASA ICESat 57 Pluto Charon 57 Explorer WISE 57 orbital rendezvous 57 asteroid Eros 57 Lunar Roving Vehicle 57 robotic rovers 57 Jupiter Icy Moons 57 Ocean Salinity SMOS 57 Stardust spacecraft 57 Mars rovers Opportunity 57 asteroid Itokawa 57 interplanetary spacecraft 57 Foton M2 57 LORRI 57 Impactor 56 manned lunar landing 56 ESA Rosetta 56 Wilkinson Microwave Anisotropy Probe 56 spacecraft orbiting 56 lunar module pilot 56 Hubble Servicing 56 Churyumov Gerasimenko 56 rover 56 onboard Chandrayaan 56 ESA ERS 56 LADEE 56 spaceborne 56 rover Spirit 56 lunar orbiters 56 Apollo astronauts 56 Ranging MESSENGER spacecraft 56 Martian surface 56 probe Chang'e 56 Rover MER 56 WISE mapped 56 Terrain Mapping Camera 56 twin Voyager spacecraft 56 Planck spacecraft 56 Mini SAR 56 ESA Huygens probe 56 Flyby spacecraft 56 flyby spacecraft 56 Frank Borman 56 Mars Polar Lander 56 X ray observatory 56 lander 56 comet flyby 56 Alpha Particle 56 SOHO spacecraft 56 planetary exploration 56 lunar rovers 56 weather satellite TIROS 56 Mars Color Imager 56 ESA Planck 56 Martian rover 56 Planetary Transits 55 Cassini Huygens Mission 55 INSAT 4CR 55 Moderate Resolution Imaging 55 Saturn Cassini 55 Mars orbiter 55 Mars Lander 55 KAGUYA 55 NASA Interstellar Boundary 55 MESSENGER spacecraft 55 Mars CRISM 55 ExoMars rover 55 PSLV C7 55 Kepler Space Telescope 55 Opportunity Mars rovers 55 Solar Orbiter 55 landers 55 gamma ray spectrometer 55 Mars Exploration 55 Reflection Radiometer 55 spacecraft orbited 55 extravehicular activities 55 Philae lander 55 orbit GEO 55 Cryosat 55 Imaging Spectrometer 55 NASA rovers Spirit 55 NASA rover Spirit 55 Huygens mission 55 Antenna LISA 55 Global Surveyor 55 NASA MESSENGER 55 rover Opportunity 55 LRO 55 moons Phobos 55 Anisotropy Probe WMAP 55 Hayabusa probe 55 NASA Stratospheric Observatory 55 orbiter 55 Ulysses spacecraft 55 GOCE 55 Deep Impact eXtended Investigation 55 CHIPSat 55 Foton M3 55 DISR 55 Rosetta orbiter 55 Herschel Space Telescope 55 Comet 9P/Tempel 1 55 Recovery Experiment SRE 55 Spaceguard 55 SIM PlanetQuest 55 PSLV C6 55 Chandrayan 55 ST5 55 lunar landers 55 Orbiter LRO 55 NASA STEREO 55 Shepherding Spacecraft 55 Mars Odyssey spacecraft 55 Servicing Mission 55 HiRISE camera 55 ESA GOCE 55 asteroid Steins 55 comet Churyumov Gerasimenko 55 Descent Imager Spectral Radiometer 55 Hubble telescope 55 New Horizons spacecraft 55 Lunar Excursion Module 55 MESSENGER 55 Thermal Emission Spectrometer 55 orbiting Hubble telescope 54 Infrared Pathfinder Satellite 54 comet particles 54 orbiter lander 54 Gusev crater 54 Yinghuo 1 54 Cassini Huygens spacecraft 54 MErcury Surface Space ENvironment 54 GSLV D3 rocket 54 Orbiter spacecraft 54 Galaxy Evolution 54 Mars Opportunity rover 54 spacecraft Chandrayaan 1 54 robotic explorers 54 Space Capsule 54 Landsat satellite 54 Jupiter Ganymede 54 Satish Dhawan 54 Space ENvironment GEochemistry 54 Comet Halley 54 celestial observations 54 High Resolution Imaging 54 microscopic imager 54 unmanned spacecraft 54 OSIRIS REx 54 dexterous robot 54 Martian lander 54 Lunar Crater 54 Mars Reconnaissance Orbiter 54 IBEX spacecraft 54 twin rover Opportunity 54 Hubble 54 ESA Proba 54 NASA twin STEREO 54 COROT 54 orbiting spacecraft 54 Compton Gamma Ray 54 Total Ozone Mapping 54 lunar equator 54 Hubble Space Telescope 54 Atlas IIAS 54 Rockot launch 54 orbiting gamma ray 54 comet chaser 54 Moon Mineralogy Mapper 54 gamma ray observatory 54 Shenzhou spacecraft 54 Deep Impact mission 54 Ocean Salinity 54 manned orbital 54 NASA Cassini 54 Upsilon Andromedae 54 Mercury flyby 54 Jupiter Icy Moons Orbiter 54 WMAP satellite 54 Red Planet 54 Dyna Soar 54 crewed spacecraft 53 highly elliptical orbits 53 Evolution Explorer 53 enters lunar orbit 53 Mir Space Station 53 X ray telescopes 53 NASA MESSENGER spacecraft 53 lunar orbiter 53 robotic probes 53 Bug Nebula 53 lunar landings 53 Infrared Astronomical Satellite 53 Lunar Module 53 SMOS Soil Moisture 53 Epoxi 53 Moon Mineralogy Mapper M3 53 comet Wild 53 ChemCam 53 Deep Impact Extended 53 moonwalkers 53 Apollo lunar 53 Geosynchronous 53 NASA Wilkinson Microwave 53 LCROSS Lunar Crater Observation 53 outermost planets 53 neutron spectrometer 53 NASA Stardust NExT 53 Orbiter 53 Enceladus flybys 53 spacecraft Cassini 53 Observatory SDO 53 X ray Telescope XRT 53 Cloud Aerosol Lidar 53 Pancam 53 reentry capsule 53 http:/saturn.jpl.nasa.gov 53 spaceward 53 Hubble Space 53 LCROSS spacecraft 53 robotic lander 53 Martian terrain 53 Huygens Probe 53 NASA Lunar Reconnaissance 53 Pilot George Zamka 53 Voyager Galileo 53 Chang'eI 53 parachutes malfunctioned 53 Infrared Astronomical Satellite IRAS 53 Chandrayaan 53 rover Spirit landed 53 orbiting Hubble Space Telescope 53 unmanned lunar 53 TanDEM X 53 Deep Impact comet 53 NASA 53 GSLV rockets 53 NAVSTAR Global Positioning System 53 infrared astronomy 53 ICESat 53 Observatory STEREO 53 Kepler spacecraft 53 robotic rover 53 Hubble Telescope 53 Spirit Mars rover 53 UK DMC2 53 COBE satellite 53 Lunar Surface 53 sols 53 SPACECRAFT 53 spacecraft Hayabusa 53 Infrared Astronomy SOFIA 53 Mars moon Phobos 53 Messenger spacecraft 53 AMASE 53 Volatile Evolution 53 Planck satellite 53 aboard Vostok 53 NASA Far Ultraviolet 53 Nasa Mars Odyssey 53 GEochemistry 53 ESO telescopes 53 Mercury Gemini 53 Manned missions 53 Spacesuits 53 Pegasus XL 53 NASA Solar Terrestrial 53 Chandrayaan II 53 Space Telescope GLAST 53 Spacelab 53 X ray telescope 52 Hyper X 52 Impact Probe MIP 52 NASA Gamma ray 52 Fermi telescope 52 Vostok spacecraft 52 WISE telescope 52 outer planets 52 O OREOS 52 nanosatellite 52 Taurus XL 52 NASA Lunar Crater 52 ESO VLT 52 twin rovers Spirit 52 Proba 2 52 OSIRIS Rex 52 THEMIS satellites 52 Satellite Launch Vehicle GSLV 52 TIROS 52 unmanned lunar orbiter 52 FASTSAT 52 Foton spacecraft 52 ESA CNES 52 X ray spectrometer 52 lunar rover 52 Mars Orbiter Camera 52 deorbiting 52 Discovery STS 52 comets asteroids 52 PSLV C# 52 Uninhabited Aerial Vehicle 52 radar altimeter 52 Nasa 52 Pluto Kuiper Belt 52 aboard Skylab 52 discover Fomalhaut 52 Martian orbit 52 Telescope BAT 52 Meridiani plains 52 Skylab 52 ATV Johannes Kepler 52 Hale Bopp 52 CBERS 52 Venusian surface 52 Rosetta comet chaser 52 Doppler measurements 52 Diviner instrument 52 geostationary earth 52 Resourcesat 2 52 Opportunity rover 52 Comet Hartley 2 52 SpaceShipTwo SS2 52 Yuri Shargin 52 GeneSat 52 infrared observatory 52 Phobos Grunt 52 SCISAT 52 detect gravitational waves 52 Gravity Probe B 52 robotic landers 52 Helioseismic 52 LRO spacecraft 52 Mössbauer spectrometer 52 NROL 52 LRO LCROSS 52 Mars 52 Nasa Jet Propulsion 52 manned Shenzhou 52 NanoSail D 52 impactor spacecraft 52 SSMEs 52 NASA Moon Mineralogy 52 lunar landing 52 Launch Scrubbed 52 STORRM 52 SpaceX Dragon 52 Investigation DIXI 52 Comet #P/Churyumov-Gerasimenko 52 unmanned rover 52 SpaceX Falcon 9 52 martian surface 52 H IIA 52 LISA Pathfinder 52 GSLV F# 52 Shackleton crater 52 twin rover Spirit 52 ill fated Beagle 52 Cassini flyby 52 interplanetary missions 52 George Zamka 52 CARTOSAT 52 ADM Aeolus 51 PSLV C 51 Shuttle Radar Topography 51 EPOXI mission 51 Ring Nebula 51 twin Mars rovers 51 AMIE camera 51 VIRTIS 51 QQ# 51 icy moons 51 Hinode spacecraft 51 Martian arctic 51 NPO Lavochkin 51 Reusable Launch Vehicle 51 Titan flybys 51 NEAR Shoemaker 51 Solar Optical Telescope 51 planetary missions 51 Tropical Rainfall Measuring 51 CALIPSO 51 Gerard Kuiper 51 mission Chandrayaan 51 Deke Slayton 51 STSS Demo 51 highly elliptical orbit 51 Huygens 51 GLAST spacecraft 51 Minotaur rocket 51 moons orbiting 51 spacecraft flyby 51 Lunar Reconnaissance Orbiter Camera 51 Reconnaissance Orbiter 51 lunar orbit 51 Characterization EPOCh 51 Express orbiter 51 interstellar particles 51 ion propulsion 51 Landsat satellites 51 lunar explorer 51 ESA Mars 51 visit http:/saturn.jpl.nasa.gov 51 Hyakutake 51 Hayabusa spacecraft 51 Solar Terrestrial Relations 51 Kaguya spacecraft 51 Herschel telescope 51 Stardust capsule 51 Space Shuttle Discovery 51 GSLV D3 51 Asteroid Itokawa 51 Minotaur IV 51 Opportunity Mars rover 51 Satellite Launch Vehicle 51 manned lunar missions 51 Shoemaker Levy 51 RHESSI 51 Radiation Belt 51 Commander Charlie Hobaugh 51 PSLV C8 51 Ray Spectrometer 51 SMOS 51 lobate scarps 51 Earth asteroid Itokawa 51 Cosmonaut Yuri Gagarin 51 twin rovers 51 shuttle Endeavor 51 Resolution Stereo Camera 51 Mössbauer 51 SSETI Express 51 Nasa Deep Impact 51 EGRET 51 manned spacecraft Shenzhou VI 51 Block 5D 51 SPICAM 51 HiRISE 51 Synthetic Aperture Radar 51 P/# A2 51 lunar meteorites 51 polar orbiting 51 GSLV rocket 51 closest flyby 51 martian 51 NASA JPL 51 stellar occultation 51 DIXI 51 Flyby 51 Cosmic Microwave Background 51 lunar probe Chang'e 51 Martian winters 51 remote sensing satellite Resourcesat 51 specialists Scott Parazynski 51 shuttle orbiter 51 Spectrograph 51 Mini Thermal Emission 51 Jing Haipeng 51 Earth Asteroid Rendezvous 51 orbited Jupiter 51 NASA Deep Impact 51 simulated lunar 51 Panoramic Camera 51 Astrobotic 51 Space Telescope 51 ESA ASI 51 Virgin Galactic unveils 51 X ray Spectrometer 51 Exoplanet 51 MESSENGER MErcury Surface 51 Gene Cernan 51 Son Nghiem 51 Shuttle Atlantis blasts 51 THEMIS 51 geosynchronous satellite launch 51 ARRL AMSAT 51 Cartosat 2A 51 exoplanets planets 51 PSLV C# rocket 51 infrared telescope 51 Optical Spectroscopic 51 solar corona 51 imaging spectrometer 51 Multi Object Spectrograph 51 WISE infrared 51 exoplanet hunter 51 Huygens lander 51 PSLV C9 51 veteran spaceflyer 51 Phobos 51 NASA Cassini spacecraft 51 Laurie Leshin 51 X ray observatories 51 radio occultation 51 Cosmic Background Explorer COBE 51 Jules Verne ATV 51 Spacecraft 51 Mars Atmosphere 51 Theodore von Karman 51 Lunar Module Pilot 51 Aeronomy 50 HARPS spectrograph attached 50 orbited Earth 50 Magnetospheric 50 Foing 50 Itokawa 50 Stardust NExT 50 entered lunar orbit 50 Spirit rover 50 Kepler 9c 50 Anisotropy Probe 50 Relative Navigation 50 RXTE 50 ARES IX 50 astronaut Owen Garriott 50 Apollo Skylab 50 lunar regolith 50 Mars orbiting spacecraft 50 Satellites GOES 50 XMM Newton 50 D CIXS 50 ultraviolet spectrograph 50 Cometary 50 Jules Verne Automated Transfer 50 Kuiper belt objects 50 Advanced Spaceborne Thermal Emission 50 Earth orbit 50 ejecta plume 50 Cydonia region 50 Great Observatories 50 orbiter Cassini 50 Kiruna Sweden 50 NASA Landsat 50 Neutron Spectrometer 50 NFIRE 50 Kepler Telescope 50 Planetary Camera 2 50 Charon Pluto 50 Composite Infrared Spectrometer 50 NASA Mars rover 50 C1XS 50 Interstellar Boundary Explorer 50 STEREO spacecraft 50 reconnaissance orbiter 50 windshield wiper maneuver 50 orbiting telescopes 50 ATV Jules Verne 50 Laboratory MSL 50 Lunar Module Eagle 50 exobiology 50 Shuttle Challenger 50 Phoenix Mars Lander 50 Reflection Radiometer ASTER 50 Michael Studinger 50 ESA Cluster 50 JIMO 50 moon permanently shadowed 50 ray Space Telescope 50 Clementine spacecraft 50 Lander robotic arm 50 flyby Cassini 50 ExoMars 50 exo planet 50 planetary surfaces 50 Vehicle PSLV C9 50 Comet Hartley 50 Martian equator 50 EPOXI spacecraft 50 Hubble Space telescope 50 X #A WaveRider 50 ESA XMM Newton 50 interstellar dust samples 50 Wilkinson Microwave Probe 50 Shallow Radar 50 Neptec 50 Infrared Array Camera 50 NFIRE satellite 50 duration spaceflights 50 flyby 50 Io Europa 50 MISSE 50 NASA Great Observatories 50 Kaguya 50 stellar occultations 50 Climate Sounder 50 Cygnus spacecraft 50 orbiting observatory 50 Zeta Ophiuchi 50 Gus Grissom 50 ESA CryoSat 50 Huygens descent 50 Operation IceBridge 50 Brazilian Marcos Pontes 50 HRSC 50 BLG #Lb 50 LAGEOS 50 spokesman Michael Braukus 50 Geo synchronous 50 aboard Soyuz TMA 50 SpaceLoft XL rocket 50 Sacred Vessel 50 OGLE TR #b 50 WFC3 50 orbital insertion 50 Nasa Kepler 50 GeneSat 1 50 Polar Lander 50 Japanese Pressurized Module 50 uncrewed 50 Gravity Probe 50 Russian cosmonaut Yuri Usachev 50 OSIRIS 50 Shenzhou V spacecraft 50 hypersonic speeds 50 ESA Integral 50 Huygens probe 50 Science Experiment HiRISE 50 Cassini spacecraft orbiting 50 LCROSS 50 NASA Goddard 50 CubeSat 50 Suzaku X ray 50 GOCE satellite 50 YES2 50 Cosmodrome 50 Kazakhstan Baikonur Cosmodrome 50 Emily Lakdawalla 50 manned spacecraft 50 MARSIS 50 Exceptional Achievement Medal 50 PSLV rocket 50 Terrestrial Planet Finder 50 Rosetta lander 50 Mars Descent Imager 50 microgravity experiments 50 Imaging Spectroradiometer MODIS instrument 50 Exploration Rover 50 STScI 50 EPOXI 50 lander rover 50 Sergei Korolev 50 inhabitable planets 50 Instrument OMI 50 SELENE probe 50 UA Lunar 50 whiz harmlessly 50 Jupiter flyby 50 NASA Orbiting Carbon 50 Miniature Synthetic Aperture Radar 50 AKARI 50 COBE 50 Ariane launcher 50 astronauts 50 IKONOS 50 PASADENA Calif. NASA 50 ROCSAT 2 50 Interplanetary Internet 50 NASA Kepler spacecraft 50 Regolith 50 XMM Newton satellite 50 Cosmic Evolution 50 Astrosat 50 SIRTF 50 Launch Vehicle 50 lunar module 50 NASA Ames 50 spaceship 50 Webb Telescope 50 six wheeled rover 50 CRISM 50 orbiters landers 50 SpaceX Falcon 50 Hayabusa capsule 49 ExoMars Trace Gas 49 GPS IIF 49 Cabeus crater 49 Mars Climate Orbiter 49 Fermi Telescope 49 Laser Interferometer Space 49 Context Camera 49 Spacewatch 49 Epsilon Eridani 49 TacSat 49 martian atmosphere 49 geo synchronous 49 Japan Hayabusa spacecraft 49 MidSTAR 49 hunting Kepler telescope 49 Kuiper Belt Object 49 scientist Bernard Foing 49 probe Huygens 49 Resourcesat 49 Mars Odyssey orbiter 49 MUSES C 49 OCO satellite 49 reionization 49 Heliospheric Observatory SOHO 49 NASA ESA Hubble 49 Lunar Outpost 49 smallest exoplanet 49 Titan flyby 49 shuttle Endeavour STS 49 Mauna Kea Hawaii 49 Vehicle ATV 49 NASA Spirit rover 49 Loretta Hidalgo Whitesides 49 Dan Durda 49 Microscopic Imager 49 THEMIS spacecraft 49 Predator drone flies 49 Kepler observatory 49 Plesetsk Cosmodrome 49 Europa Orbiter 49 OSTM Jason 2 49 NEOSSat 49 MARSIS radar 49 HiRISE image 49 heatshield 49 Karen Nyberg 49 Fregat upper stage 49 Kuiper Belt Objects 49 Situ Resource 49 LCROSS mission 49 starboard SARJ 49 Hayabusa 49 Continuity Mission LDCM 49 Envisat satellites 49 Epsilon Aurigae 49 RS Ophiuchi 49 DubaiSat 1 49 MPCV 49 microlensing events 49 BBSNews #-#-# NASA 49 unpiloted 49 Saturnian moon Titan 49 Comet Hale Bopp 49 Space Shuttle 49 Space Infrared Telescope 49 moon Phobos 49 flybys 49 Martian craters 49 GOES O 49 Taurus Littrow Valley 49 Cartosat 49 planetary spacecraft 49 VASIMR 49 Mossbauer 49 Atlantis STS 49 Imaging Spectrograph 49 LSAM 49 Galilean moons 49 ISRO Chandrayaan 49 Area Telescope LAT 49 journal Acta Astronautica 49 lunar meteorite 49 ARGUS IS 49 Manned Spacecraft Center 49 Infrared Astronomy 49 orbiter Mars Odyssey 49 LROC 49 nanosatellites 49 Director Charles Elachi 49 Optical Gravitational Lensing Experiment 49 Sensing Satellite LCROSS 49 JPL 49 robotic geologist 49 SRTM 49 ROSAT 49 C NOFS 49 THEMIS Image 49 Helios 2B 49 SeaWiFS 49 orbiting Saturn 49 Earth Asteroid 49 Spitzer infrared telescope 49 twin STEREO spacecraft 49 Fermi Gamma ray 49 Ultraviolet Optical Telescope 49 sister rover Spirit 49 asteroid Vesta 49 astrometry 49 orbit insertion 49 electric ion propulsion 49 Gerhard Schwehm 49 Aquarius SAC 49 SpaceLoft XL 49 orbiting Kepler telescope 49 adaptive optics 49 shepherding spacecraft 49 Cassini flybys 49 moon Io 49 polarimetric 49 geosynchronous 49 noctilucent clouds 49 Lunar Exploration 49 JDEM 49 spaceplane 49 Eagle lunar lander 49 unpowered glider 49 Laser Interferometer Gravitational Wave 49 Cassini 49 Apollo Lunar Module 49 STPSat 49 RBSP 49 NIRSpec 49 Keck Interferometer 49 Deep Impact flyby spacecraft 49 mooncraft 49 Launch Vehicle EELV 49 Orbiters 49 JHU APL 49 JWST 49 Martian crater 49 Mars northern latitudes 49 Russian Soyuz Fregat 49 martian landscape 49 SPIRE instrument 49 SPHERES 49 LightSail 49 orbiting telescope 49 Canadarms 49 field Infrared Survey 49 Gamma ray burst 49 Mars lander 49 aboard ESA Envisat 49 Launch Postponed 49 interstellar dust grains 49 Cassini orbiter 49 THEMIS Images 49 YU# 49 manned lunar 49 CoRoT satellite 49 NASA MErcury Surface 49 Starfire Optical Range 49 P Churyumov Gerasimenko 49 Cassini Orbiter 49 ISRO Polar 49 extrasolar planets 49 WD5 49 ornithopter 49 Jet Propulsion Laboratory 49 Orbiting Carbon Observatory 49 Sputnik satellite 49 arctic plains 49 Decadal Survey 49 SpaceShip One 49 Bepi Colombo 49 Greenbelt Md. manages 49 manned spaceships 49 innermost planet 49 experimental payloads 49 Galileo satellites 48 Deep Impact Spacecraft 48 Infrared Telescope Facility 48 Planetary Fourier Spectrometer PFS 48 satellites orbiting Earth 48 lunar orbiting spacecraft 48 Norm Thagard 48 Cassini Image 48 Reaches Orbit 48 NASA Space Shuttle 48 Surveys ACS 48 BepiColombo joint 48 MG J# +# 48 MAVs 48 Explorer IBEX 48 exhaust plume 48 Environment Explorer LADEE 48 meteoroid 48 NOAA GOES 48 lunar missions 48 COROT satellite 48 SDSS telescope 48 Solar Dynamics 48 Facility SIRTF 48 Explorer GALEX 48 Spectroscopic Explorer 48 Redu Belgium 48 Far Ultraviolet Spectroscopic Explorer 48 orbit 48 Launch Abort System 48 Compact Reconnaissance Imaging Spectrometer 48 geo synchronous transfer 48 hypersonic scramjet 48 Shuttle Endeavor 48 ESA Envisat 48 infrared spectrometers 48 Herschel Space 48 exoplanetary 48 Commander Sergei Volkov 48 Late Heavy Bombardment 48 Moessbauer spectrometer 48 Extragalactic 48 Lunar Orbit 48 Geosynchronous orbit 48 orbital solitude 48 THEMIS mission 48 ExoMars mission 48 CloudSat 48 Walter Schirra 48 Macroscale Interactions during 48 moons orbiting Saturn 48 STEREO mission 48 EarthCARE 48 Eurockot 48 KODAK CCD Image Sensors 48 Resolution Instrument 48 Martian meteorite 48 DART spacecraft 48 Judy Resnik 48 HAMSAT 48 Data Assimilation 48 gravitational lenses