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(Click for frequent words.) 74 ESA Envisat satellite 71 Aqua satellite 70 ESA Envisat 67 Landsat satellites 66 Envisat Advanced Synthetic Aperture 66 Moderate Resolution Imaging 66 NASA THEMIS 66 Orbiter LRO 65 NASA Aqua 65 Ulysses spacecraft 65 Envisat 65 Radar ASAR 64 Ocean Salinity 64 Mission SRTM 64 Orbiter MRO 64 Mars Reconnaissance Orbiter MRO 64 Advanced Synthetic Aperture 64 MERIS 63 Express orbiter 63 SeaWiFS 63 ENVISAT 63 TerraSAR X satellite 63 NASA Cassini spacecraft 63 ESA SMART 63 aboard ESA Envisat 63 ESA ERS 63 Planck satellite 63 Solar Dynamics Observatory 63 ESA XMM Newton 63 NASA EPOXI mission 63 Rosetta spacecraft 63 Radar ASAR instrument 63 Nasa Mars Reconnaissance 63 Convection Rotation 63 Mission TRMM satellite 62 Landsat satellite 62 NASA MODIS 62 Moderate Resolution 62 WISE telescope 62 TRMM satellite 62 Cryosat 62 Ocean Salinity SMOS 62 orbiting gamma ray 62 ESA Rosetta 62 Imaging Spectroradiometer MODIS instrument 62 Earth orbiting satellites 62 Planck telescope 62 planetary Transits 62 ray Space Telescope 62 ESA Planck 62 Envisat satellites 61 NASA Landsat 61 radar altimetry 61 SCIAMACHY 61 Shuttle Radar Topography 61 Mars Color Imager 61 interferometric synthetic aperture radar 61 CoRoT satellite 61 Cassini flyby 61 Ozone Monitoring 61 NOAA GOES 61 spacecraft orbited 61 Instrument OMI 61 VIRTIS 61 Infrared Pathfinder Satellite 61 WMAP satellite 61 TRMM Microwave Imager TMI 61 ESA Mars 61 Reflection Radiometer 61 Imaging Spectroradiometer MODIS 61 MODIS 61 NASA Tropical Rainfall 61 visit http:/saturn.jpl.nasa.gov 60 laser altimeter 60 Envisat ASAR 60 Saturnian moon Titan 60 NASA LCROSS 60 penetrating radar 60 ESA ASI 60 SMOS 60 Earth Observation EO 60 Sounder AIRS instrument 60 Cassini Huygens spacecraft 60 HiRISE camera 60 situ measurements 60 MODIS instrument 60 Quickbird 60 imaging spectrometer 60 Kiruna Sweden 60 infrared satellite imagery 60 Synthetic Aperture Radar SAR 60 Tropical Rainfall Measuring 60 polarimetric 60 XMM Newton observatory 59 Landsat images 59 NASA CloudSat 59 LRO spacecraft 59 http:/www.nasa.gov/cassini 59 EPOXI spacecraft 59 Mars Orbiter Camera 59 Imaging Spectrometer 59 Planetary Transits 59 WISE infrared 59 Galileo spacecraft 59 Heliospheric Observatory SOHO 59 Uninhabited Aerial Vehicle 59 THEMIS satellites 59 Envisat radar 59 NASA MODIS satellite 59 NASA Stardust spacecraft 59 Reflection Radiometer ASTER 59 NASA ESA Hubble 59 ESA CryoSat 59 Mars Odyssey spacecraft 59 UAVSAR 59 NASA ICESat 58 GOCE satellite 58 Spectroradiometer MODIS 58 Meteosat 58 NASA Wilkinson Microwave 58 Hinode spacecraft 58 RADARSAT 58 Mars Orbiter 58 IBEX spacecraft 58 Cloud Aerosol Lidar 58 http:/saturn.jpl.nasa.gov 58 Comet 9P/Tempel 1 58 twin STEREO spacecraft 58 CryoSat mission 58 Rosetta orbiter 58 Mission TRMM 58 Rosetta comet chaser 58 infrared imagery 58 AMIE camera 58 Huygens Probe 58 KAGUYA 58 Satellite imagery 58 TerraSAR X 58 Planck observatory 58 polar vortex 58 Cassini spacecraft 58 Clementine spacecraft 58 AATSR 58 NASA QuikScat satellite 58 gamma ray observatory 58 Titan flybys 58 NASA Cassini 58 Remote sensing 58 SMOS Soil Moisture 58 Measuring Mission TRMM 57 Total Ozone Mapping 57 laser altimetry 57 EPOXI mission 57 Satellite GOES 57 Advanced Microwave Scanning 57 Imaging Spectrometer MERIS 57 Titan flyby 57 ESA Herschel 57 ROSAT 57 Comet Hartley 57 Lunar Reconnaissance Orbiter LRO 57 Orbiting Carbon Observatory OCO 57 NASA Mars Reconnaissance 57 HRSC 57 Mars CRISM 57 ESA Integral 57 GOSAT 57 Foton M3 57 Ontario Lacus 57 Multi Object Spectrometer 57 SOHO spacecraft 57 Diviner instrument 57 MESSENGER spacecraft 57 Advanced Spaceborne Thermal Emission 57 DigitalGlobe WorldView 57 Orbiter spacecraft 57 interferograms 57 HiRISE image 57 Observatory SDO 57 Descent Imager Spectral Radiometer 57 orbiting Mars 57 ICESat 57 STEREO spacecraft 57 orbiting observatories 57 UKIRT 57 IKONOS satellite 57 SCISAT 57 Smos 57 Hinode satellite 57 Huygens lander 57 comet flyby 57 Infrared imagery 57 Lunar CRater Observation 57 XMM Newton satellite 57 comet chaser 57 radio occultation 57 Imaging Spectroradiometer 56 THEMIS mission 56 Helios 2B 56 AIRS infrared 56 TanDEM X 56 Atmospheric Infrared Sounder AIRS 56 NASA Voyager spacecraft 56 NASA Mars Odyssey 56 orbiter Mars Odyssey 56 NASA Lunar Prospector 56 NASA Lunar Reconnaissance 56 NASA MESSENGER spacecraft 56 THEMIS Images 56 auroral emissions 56 Composite Infrared Spectrometer 56 Nasa Mars Odyssey 56 Climate Experiment GRACE 56 Wilkinson Microwave Probe 56 MTSAT 56 interferogram 56 Comet Encke 56 Moon Mineralogy Mapper 56 orbiting spacecraft 56 Mars orbiter 56 GALEX 56 ESA Cluster 56 Resolution Stereo Camera 56 thermal infrared 56 TIROS 56 rocky extrasolar planet 56 HiRISE images 56 Klekociuk 56 Compact Reconnaissance Imaging Spectrometer 56 rover panoramic 56 Huygens probe landed 56 Planck spacecraft 56 Fermi telescope 56 NASA Far Ultraviolet 56 ASAR 56 smallest exoplanet 56 probe Huygens 56 spaceweather.com 56 OMEGA instrument 56 APXS 56 AIRS instrument 56 NASA satellites orbiting 56 telescopic observations 56 IKONOS 56 Moon Mineralogy Mapper M3 56 SMOS mission 56 gamma ray spectrometer 56 X ray spectrometer 56 Hubble Space Telescope HST 56 AMSR E 56 Neutron Detector 56 XMM Newton X ray 55 radar altimeter 55 Mercury flyby 55 AKARI 55 Kepler Mission 55 orbiter Cassini 55 Deep Impact flyby spacecraft 55 AERONET 55 airglow 55 polar orbiting satellites 55 Proba 2 55 spacecraft flyby 55 GOES O 55 Planetary Fourier Spectrometer PFS 55 HiRISE camera aboard 55 Enceladus flyby 55 Solar TErrestrial RElations Observatory 55 Saturn moon Enceladus 55 NEAR Shoemaker 55 Moderate Imaging Spectroradiometer 55 NASA Interstellar Boundary 55 Context Camera 55 altimetry 55 Lunar Reconnaissance Orbiter Camera 55 Wilkinson Microwave Anisotropy Probe 55 CoRoT 9b 55 Atmospheric Infrared Sounder 55 THEMIS spacecraft 55 Syrtis Major 55 Igor Chekalin 55 Mars Climate Sounder 55 Envisat Medium Resolution 55 Phobos Grunt 55 N. Rathnasree 55 Mars Pathfinder lander 55 X ray observatory 55 Lunar Orbiter 55 TRMM 55 Ocean Surface Topography 55 Elenin 55 ESA GOCE 55 Ikonos 55 spacecraft Cassini 55 multispectral imagery 55 Fomalhaut b 55 Cassini Huygens 55 springtime ozone 55 GOCE 55 MTSAT 1R 55 Hinode 55 Soil Moisture 55 NASA Atmospheric Infrared 55 Cassini flybys 55 Kepler spacecraft 55 Southern Observatory ESO 55 Samuel Oschin Telescope 55 Spaceweather.com 55 Explorer WISE 55 DISR 55 Sojourner Rover 55 Climate Experiment 54 Eumetsat 54 spacecraft orbiting 54 Infrared Astronomical Satellite IRAS 54 microscopic imager 54 Comet Hartley 2 54 infrared spectrometers 54 Recovery Experiment SRE 54 asteroid Steins 54 SMOS satellite 54 Huygens descent 54 Odyssey orbiter 54 Mars Odyssey Orbiter 54 RADARSAT 2 54 satellite altimetry 54 Nasa spacecraft 54 closest flyby 54 Optical Microscope 54 Formosat 2 54 Mars moon Phobos 54 Anisotropy Probe WMAP 54 interplanetary spacecraft 54 ESO VLT 54 orbiting Hubble telescope 54 infrared observatory 54 NASA STEREO 54 ESO telescopes 54 LAGEOS 54 Synthetic Aperture Radar 54 Herschel Space 54 remotely sensed 54 Landsat 54 Alpha Particle 54 Landsat imagery 54 orbiting Hubble Space Telescope 54 Viking orbiters 54 High Resolution Imaging 54 X ray telescopes 54 sunspot cluster 54 Operation IceBridge 54 THEMIS 54 Okmok Caldera 54 NASA Stardust NExT 54 RXTE 54 Mars orbiting spacecraft 54 Opportunity Mars rover 54 neutron spectrometer 54 Frascati Italy 54 Sensing Satellite LCROSS 54 vegetation greenness 54 EPOCh 54 Metop 54 Martian lander 54 Infrared Mapping Spectrometer VIMS 54 Dynamics Observatory 54 WISE spacecraft 54 Viking Orbiter 54 irregularly shaped asteroid 54 Infrared Astronomy SOFIA 54 Normalized Difference Vegetation 54 submillimetre 54 Lunar Prospector 54 ESA Huygens probe 54 hyper spectral 54 ejecta plume 54 Lunar Orbiter Laser Altimeter 54 telescopic camera 54 GigaGalaxy Zoom 54 polar orbiting 54 Aeronomy 54 SRTM 54 Kepler Space Telescope 54 Aqua satellites 54 view Sensor SeaWiFS 54 NASA Cosmic Background 54 ship Akademik Fyodorov 53 Optical Spectroscopic 53 ExoMars rover 53 Near Infrared Camera 53 ESO Paranal Observatory 53 Mössbauer 53 SPICAM 53 moon permanently shadowed 53 Rover Opportunity 53 Mars Odyssey orbiter 53 GOES satellites 53 O OREOS 53 asteroid Eros 53 vehicle PSLV C# 53 comet nucleus 53 Stardust spacecraft 53 NASA Lunar Crater 53 orbiting Saturn 53 Cassini 53 infrared telescope 53 NASA Odyssey orbiter 53 Meteorological Satellites 53 Robotic Arm Camera 53 Spectrograph 53 ATV Johannes Kepler 53 CloudSat 53 Interferometric Synthetic Aperture Radar 53 ESO PR 53 Herschel telescope 53 submillimeter wavelength 53 inch Samuel Oschin 53 infrared mapping spectrometer 53 RHESSI 53 OSIRIS 53 Mini SAR 53 stratospheric balloon 53 Multi Object Spectrograph 53 ADM Aeolus 53 Observatory STEREO 53 QQ# 53 arcminutes 53 MetOp 53 Arecibo radar 53 Spectroradiometer 53 Huygens spacecraft 53 NASA Mars Orbiter 53 IKONOS Satellite 53 Cassini Equinox 53 Herschel Space Telescope 53 XMM Newton 53 AVHRR 53 NASA WMAP 53 Jean Pierre Bibring 53 Pancam 53 Keck Interferometer 53 spectroscopic measurements 53 Saturnian 53 Messenger spacecraft 53 Shepherding Spacecraft 53 volcanic plumes 53 Hayabusa spacecraft 53 Mercury magnetosphere 53 Interferometer VLTI 53 Hubble orbits 53 Viking Lander 53 Thermal Emission 53 Giovanni Cassini 53 Ranging MESSENGER spacecraft 53 flyby spacecraft 53 Solar Optical Telescope 53 ESO telescope 53 Kounotori2 53 NASAs 53 Science Experiment HiRISE 53 bathymetric 53 onboard Chandrayaan 53 LISA Pathfinder 53 Foton M2 53 Huygens mission 53 X ray telescope 53 spaceborne 53 infrared telescopes 52 fissure eruption 52 Lunokhod 52 infrared spectra 52 robotic explorer 52 spiral galaxy NGC 52 Suzaku X ray 52 Heterodyne Instrument 52 Antarctic ozone 52 ASAR images 52 Aram Chaos 52 comet Hartley 2 52 COROT 52 ultraviolet imaging spectrograph 52 APEX telescope 52 NEOWISE 52 Observatory Very 52 Antarctica EPICA 52 SpaceWeather.com 52 Submillimeter Array 52 Yinghuo 1 52 Sumatra Andaman earthquake 52 solar prominences 52 CBERS 2B 52 Kazakhstan Baikonur Cosmodrome 52 NASA Kepler 52 astronaut Douglas Wheelock 52 Lunar Crater 52 Earth Observation Programmes 52 exhaust plume 52 Hubble Space telescope 52 asteroid Itokawa 52 Satellites GOES 52 Anisotropy Probe 52 Candor Chasma 52 Fermi Gamma ray 52 Stardust NExT mission 52 Deep Impact probe 52 moon Io 52 Solar Terrestrial Relations 52 Thermal Emission Spectrometer 52 Michael Studinger 52 astrometric 52 CRISM 52 radiometer 52 Shackleton crater 52 CALIPSO satellites 52 Gusev crater 52 ESA Proba 52 Telescope BAT 52 Kaguya spacecraft 52 jovian 52 galaxy M# [001] 52 towering thunderheads 52 NASA Stratospheric Observatory 52 EUMETSAT 52 Ranging spacecraft 52 NASA Solar Terrestrial 52 infrared astronomy 52 EarthCARE 52 Array ALMA 52 GeoEye Satellite 52 FORMOSAT 52 Viking landers 52 RPWS 52 Ice Coring 52 LADEE 52 Global Precipitation Climatology 52 Delfi C3 52 convective clouds 52 gamma ray spectrometry 52 spectral bands 52 CryoSat satellite 52 Earth asteroid Itokawa 52 Ikonos satellite 52 interstellar dust samples 52 SAR interferometry 52 HIAPER 52 DigitalGlobe WorldView 2 52 UVIS instrument 52 P/# A2 52 Fermi LAT 52 Digitalglobe 52 Chandra Observatory 52 Fermi Telescope 52 mineralogical mapping 52 distant quasar 52 Infrared Array Camera 52 Heliospheric Observatory 52 Infrared Mapping Spectrometer 52 Cryosat satellite 52 exoplanets planets 52 Proba 52 Upsilon Andromedae b 52 asteroid Vesta 52 radar interferometry 52 NASA Fermi Gamma 52 Relations Observatory STEREO 51 NASA Moon Mineralogy 51 radiosondes 51 UK DMC2 51 Curiosity rover 51 georeferenced 51 Ny Ålesund 51 remote sensing imagery 51 Burst Alert 51 Surface Stereo Imager 51 Thierry Legault 51 hexagonal mirrors 51 New Horizons spacecraft 51 seafloor sediments 51 RS Ophiuchi 51 radiometry 51 CARTOSAT 51 Eagle lunar module 51 Valles Marineris canyon 51 piggybacked Huygens probe 51 Quickbird satellite 51 radiotelescope 51 OrbView 3 51 deep convective clouds 51 Hayabusa probe 51 NASA MESSENGER 51 SPIRE instrument 51 Microscopic Imager 51 Hubble Ultra 51 Satellite Imagery 51 satellites orbiting Earth 51 MGS Mars Orbiter Camera 51 Helix Nebula 51 reconnaissance orbiter 51 HARPS spectrograph 51 Cherenkov 51 NASA twin STEREO 51 Orbital Debris 51 spectrographic 51 IFSAR 51 Cosmic Background Explorer 51 microwave radiometer 51 Mauna Kea Hawaii 51 Mars landers 51 CALIPSO 51 exo planet 51 Ground penetrating radar 51 Interstellar Boundary Explorer 51 X ray Telescope XRT 51 Epsilon Aurigae 51 Meteorological Satellite 51 satellite imagery 51 flyby Cassini 51 Miniature Synthetic Aperture Radar 51 Climate Experiment SORCE 51 spectroscopic analysis 51 stellar occultations 51 lidar instrument 51 constellations Cygnus 51 moons orbiting Saturn 51 MARSIS 51 mineralogical composition 51 sub glacial lakes 51 moons Europa 51 paleomagnetic 51 outer corona 51 Gravity Recovery 51 Jupiter moon Io 51 Magnetospheric 51 DMCii 51 Shallow Subsurface Radar 51 Global Surveyor spacecraft 51 Nili Fossae 51 Comet Boethin 51 HARPS spectrograph attached 51 Svalbard Norway 51 BepiColombo 51 LCROSS Lunar Crater Observation 51 refurbished Hubble Space 51 Foing 51 cometary 51 Jay Zwally 51 Mars Reconnaissance Orbiter 51 Cassini orbiter 51 Wallops Island Va. 51 Vexcel 51 Galaxy Evolution 51 Infrared Astronomy 51 Deep Impact comet 51 Optical Gravitational Lensing Experiment 51 Venusian surface 51 Itokawa asteroid 51 satellite RISAT 51 Comet Halley 51 Diviner Lunar Radiometer Experiment 51 astronomical telescope 51 geomagnetism 51 constellation Carina 51 infrared spectrometer 51 windshield wiper maneuver 51 GRACE Gravity 51 SINFONI 51 retroreflector 51 lunar orbiters 51 NuSTAR 51 Foton spacecraft 51 NASA COBE satellite 51 spacecraft Chandrayaan 1 51 remote sensing satellites 51 Atacama Large Millimeter submillimeter 51 NASA Hubble Space 51 airborne particles affect 51 Cassini ultraviolet 51 Polar Regions 51 observing satellites 51 BLG #Lb 51 scatterometer 51 astronauts Hans Schlegel 51 DigitalGlobe QuickBird 51 BBSNews Photos 51 Cometary 51 QuickBird satellite imagery 51 Mossbauer spectrometer 51 substorm 51 subsurface ocean 51 Voyager spacecraft 51 GIOVE B 51 Atlantis Undocks From 51 RapidEye constellation 51 IceBridge 51 comet particles 51 Infrared Thermal Imaging Spectrometer 51 Global Surveyor 50 Subaru telescope 50 Surveys ACS 50 Mars Opportunity rover 50 orbited Jupiter 50 backscattered 50 SIRAL 50 La Silla Observatory 50 cometary dust 50 TecSAR 50 extrasolar planet 50 flyby 50 Mars lander 50 Resourcesat 50 Martian dust 50 HUDF 50 Lagoon Nebula 50 #/#-hour parachute 50 NASA Chandra 50 Mars Meridiani Planum 50 Cassini Huygens Mission 50 Hubble observations 50 Martian rovers 50 NASA Orbiting Carbon 50 InSAR 50 Planetary Camera 2 50 Extragalactic 50 Program DMSP 50 Gamma ray burst 50 satellite altimeters 50 meteoroid 50 Earth magnetotail 50 Gamma ray 50 Keck Telescope 50 orthorectified 50 moon Enceladus 50 meteorological satellites 50 Martian polar 50 Cosmic Microwave Background 50 ESOC 50 Telesat Nimiq 50 Resourcesat 2 50 ortho rectified 50 solar corona 50 Opportunity rover 50 comet Churyumov Gerasimenko 50 Reconnaissance Orbiter 50 Space Telescope GLAST 50 LEO satellites 50 Nasa Kepler 50 Pavlof Volcano 50 Igor Semiletov 50 airborne LIDAR 50 Mossbauer 50 gradiometer 50 MetOp satellite 50 HiRISE 50 Churyumov Gerasimenko 50 Canadian Julie Payette 50 planet magnetosphere 50 DEIMOS 50 Anthony Remijan 50 Philae lander 50 gaseous planet 50 shepherding spacecraft 50 moon Deimos 50 HARPS instrument 50 BBSNews #-#-# NASA 50 nightglow 50 Infrared Telescope Facility 50 Earth Observation 50 ESRIN 50 active volcanism 50 Brigham Grette 50 Space Imaging IKONOS 50 weather satellite TIROS 50 moonquakes 50 extravehicular activities 50 Spitzer infrared 50 ESA 50 Soyuz Fregat launcher 50 orbiting Mars Odyssey 50 LOFAR telescope 50 ocean basins 50 TNOs 50 neutrino particles 50 submillimetre wavelengths 50 Orbiting Carbon Observatory 50 interstellar particles 50 axial tilt 50 Space Agency 50 TOPEX Poseidon 50 e GEOS 50 ESA CNES 50 Area Telescope LAT 50 Asteroid Itokawa 50 bathymetry 50 Mercury exosphere 50 Radiometric 50 interstellar boundary 50 SIM PlanetQuest 50 Keck telescopes 50 MG J# +# 50 German SAR Lupe 50 Gradiometer 50 multispectral 50 Mars rovers Spirit 50 Earth Observing 50 Ozone Hole 50 Perseid meteor 50 Chilean Atacama Desert 50 orbiting observatory 50 geographically referenced 50 austral summer 50 geo synchronous 50 orbiting telescopes 50 GloPac 50 meter diametre 50 martian meteorites 50 INSAT satellite 50 gamma ray flashes 50 Saturnian moon 50 radiosonde 50 OrbView 50 micron wavelengths 50 Polar Operational 50 Mesosphere 50 geo synchronous transfer 50 Atlantis undocks 50 MODIS Rapid Response 50 Anik F2 50 UVOT 50 Imaging Spectrograph 50 Quadrantid meteor shower 50 YU# 50 NASA Opportunity rover 50 Josefino Comiso 50 INTEGRAL satellite 50 shadowed craters 50 comet Wild 50 LANDSAT 50 LORRI 50 multispectral camera 50 ESTRACK 50 Evolution Explorer 50 comet chaser Rosetta 49 orbiting Chandra 49 Subaru Telescope 49 ESA Huygens 49 X ray Spectrometer 49 ROCSAT 2 49 spacecraft thrusters 49 SSETI Express 49 Oceansat 2 49 Diviner 49 gamma ray telescope 49 GRACE satellites 49 exoplanet hunter 49 NASA rovers 49 Shiveluch 49 bedrock outcropping 49 Jupiter moons Europa 49 Miniature Thermal Emission 49 Gamburtsev 49 Rosetta lander 49 ChemCam 49 Meteorological Satellites EUMETSAT 49 lunar craters 49 Mini Thermal Emission 49 Pu'u O'o vent 49 Neptune Uranus 49 NEAs 49 Analyzer TEGA 49 Spacewatch 49 astrometry 49 satellite IKONOS 49 engineer Yury Lonchakov 49 Remote Sensing Satellites 49 Spitzer Space Telescope 49 Mars Orbiter Laser Altimeter 49 Jupiter flyby 49 Stephan Quintet 49 COSMO SkyMed 49 Saturn moon Iapetus 49 polarimetry 49 Corot 7b 49 ANUSAT 49 Radarsat 49 Nankai Trough Zone 49 ESO La Silla 49 Helioseismic 49 copper impactor 49 Saturnian system 49 HAMSAT 49 X #A scramjet 49 Chajnantor plateau 49 Keck Observatory 49 Aerial photography 49 Explorer IBEX 49 extrasolar 49 spectrometric 49 Technology Centre ESTEC 49 lunar meteorites 49 VISTA telescope 49 Exoplanet 49 dimensional atlas 49 National d' Etudes 49 micro meteorites 49 satellite imagery aerial 49 polar regions 49 refrozen ice 49 Martian rover 49 LROC 49 exosphere 49 Slooh 49 WFC3 49 cosmic collisions 49 radar altimeters 49 chlorophyll fluorescence 49 Gakkel Ridge 49 Digitized Sky Survey 49 Herschel Planck 49 Environmental Satellite POES 49 Comet #P/Churyumov-Gerasimenko 49 ESO Very Large Telescope 49 Longyearbyen Norway 49 Geosynchronous orbit 49 NASA Kepler spacecraft 49 infrared spectrograph 49 spectroscopic observations 49 Mars rovers Opportunity 49 VIRTIS instrument 49 Rockot launch 49 G#.# +#.# 49 Orbiter 49 Svalbard archipelago 49 interstellar dust grains 49 INSAT 4CR 49 Noachian era 49 Saturn moon 49 Bernard Foing 49 RISAT 49 Megha Tropiques 49 THEMIS probes 49 Mars Lander 49 Hubble Near Infrared 49 Global Precipitation Measurement 49 Resolution Imaging Spectrometer 49 Ariane rocket 49 THEMIS Image 49 lunar orbiting spacecraft 49 VLF EM survey 49 subglacial lakes 49 ephemeris 49 Cydonia region 49 Phoenix lander 49 SHARAD 49 Mini Synthetic Aperture 49 panchromatic camera 49 Kepler observatory 49 Scatterometer 49 Service WGMS 49 NROL 49 C1XS 49 interferometric 49 lunar equator 49 Paulo Nespoli 49 FORCAST 49 hubble 49 Saturn moon Mimas 49 Cosmodrome 49 COROT 7b 49 YES2 49 Saturn Cassini 49 Enceladus flybys 49 GeoSAR 49 reconnaissance satellites 49 comet McNaught 49 Tunguska meteorite 49 Gerard Kuiper 49 DMSP satellites 49 journal Meteoritics 49 LCROSS mission 49 lunar orbiter Chang'e 49 unmanned probes 49 Sojourner rover 49 crustal thickness 49 Great Observatories 49 auroral activity 49 Galilean satellites 49 Geostationary 49 Infrared Astronomical Satellite 49 Cartosat 2A 49 Ultraviolet Imaging Spectrograph 49 Synthetic Aperture 49 aboard Envisat 49 Security GMES 49 Japanese Pressurized Module 49 Oefelein piloted 49 Agency JAXA 49 impactor spacecraft 49 Magnetic Imager HMI 49 radioisotope thermoelectric generators