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(Click for frequent words.) 75 Terrestrial Planet Finder 72 NuSTAR 68 BepiColombo 68 Space Interferometry Mission 67 Kepler spacecraft 67 LISA Pathfinder 66 Terrestrial Planet Finder TPF 66 Nuclear Spectroscopic Telescope Array 66 OSIRIS REx 66 Solar Orbiter 66 Lunar Reconnaissance Orbiter LRO 65 planetary Transits 65 APXS 65 LADEE 65 Antenna LISA 64 Jupiter Icy Moons 64 WISE spacecraft 64 Europa Orbiter 64 Planck satellite 64 Volatile Evolution 64 IBEX spacecraft 64 Mars Surveyor 64 Mars Atmosphere 64 Orbiting Carbon Observatory OCO 64 Convection Rotation 63 Pluto Charon 63 NASA Kepler 63 ExoMars mission 63 comet chaser 63 Kepler observatory 63 Pluto Kuiper Belt 63 ExoMars rover 63 Deep Impact eXtended Investigation 63 Kepler Mission 62 NASA THEMIS 62 Hubble Space Telescope HST 62 Jupiter flyby 62 Planetary Transits 62 ESA Planck 62 GLAST telescope 62 Solar TErrestrial RElations Observatory 62 Kepler 9c 62 BepiColombo mission 62 Curiosity rover 62 orbiting observatories 62 Churyumov Gerasimenko 61 P Churyumov Gerasimenko 61 Nasa spacecraft 61 NASA EPOXI mission 61 Titan flyby 61 Keck Interferometer 61 Rosetta orbiter 61 Orbiter LRO 61 Astrosat 61 Laboratory MSL 61 Infrared Astronomy 61 WISE telescope 61 orbiter lander 61 NASA Stratospheric Observatory 61 Giove B 61 GALEX 61 Orbiter MRO 61 laser altimeter 61 largest moon Charon 61 NASA Kepler telescope 61 Cryosat 61 NASA MESSENGER 61 windshield wiper maneuver 61 Mars Pathfinder lander 61 Spectrograph 61 Explorer WISE 61 JIMO 61 SIRTF 61 Kuiper Belt object 61 Interior Laboratory GRAIL 61 Fomalhaut b 61 BLG #Lb 61 Huygens Probe 61 ESA Rosetta 61 STSS Demo 61 COROT 61 NASA Kepler spacecraft 60 Cassini flyby 60 Near Infrared Camera 60 repeated fly bys 60 Yarkovsky effect 60 Comet #P/Churyumov-Gerasimenko 60 Martian rover 60 DIXI 60 orbiting telescope 60 Mercury flyby 60 comet #P/Churyumov-Gerasimenko 60 Herschel Planck 60 Ocean Salinity SMOS 60 Titan flybys 60 SBSS satellite 60 Phobos Grunt 60 Laser Interferometer Space 60 ST5 60 NASA STEREO 60 EPOCh 60 Environment Explorer LADEE 60 Stratospheric Observatory 60 MAVEN 60 NASAs 60 Jupiter Icy Moons Orbiter 60 comet flyby 60 Gamma ray Large 60 OSIRIS Rex 60 Enceladus flybys 59 Magnetospheric 59 Cargo Launch Vehicle 59 Cloud Aerosol Lidar 59 JDEM 59 smallest exoplanet 59 #P/Churyumov-Gerasimenko 59 orbital inclination 59 orbital insertion 59 occultations 59 Thermal Emission Spectrometer 59 NASA LCROSS 59 Yinghuo 1 59 twin STEREO spacecraft 59 MetOp satellite 59 Herschel Space Telescope 59 Solar Dynamics Observatory 59 Fermi telescope 59 Comet Churyumov Gerasimenko 59 Global Precipitation Measurement 59 Lunar Reconnaissance Orbiter 59 Space Telescope GLAST 59 Shuttle Atlantis blasts 59 Ranging spacecraft 59 Kepler Space Telescope 59 enters lunar orbit 59 extrasolar 59 Rosetta spacecraft 59 Jupiter Ganymede 59 orbiting Kepler telescope 59 NEOSSat 59 Philae lander 59 Lunar CRater Observation 59 EPOXI mission 59 robotic spacecraft 59 orbit GEO 59 Ulysses spacecraft 59 moons Phobos 59 WISE infrared 59 Rosetta comet chaser 59 infrared observatory 59 Relations Observatory STEREO 59 Saturn Uranus Neptune 59 Chandrayaan II 59 asteroids Ceres 59 Io Europa 59 gamma ray observatory 59 CALIPSO 59 asteroid Vesta 59 Climate Sounder 59 astrometric 58 microlensing events 58 HD #b [001] 58 GOES O 58 HEO payloads 58 waning gibbous 58 MetOp 58 NASA Far Ultraviolet 58 Servicing Mission 58 JWST 58 ExoMars 58 radial velocity 58 NFIRE 58 Cassini Huygens spacecraft 58 habitable worlds 58 NICMOS observations 58 Flyby spacecraft 58 interplanetary spacecraft 58 Hubble orbits 58 SMOS 58 ESA Herschel 58 OSIRIS 58 Cygnus Lyra region 58 detect gravitational waves 58 Mars Reconnaissance Orbiter MRO 58 entered lunar orbit 58 Uranus Neptune 58 inhabitable planets 58 Hubble Servicing 58 airborne particles affect 58 NASA Stardust spacecraft 58 hunting Kepler telescope 58 Lunar Prospector 58 Space ENvironment GEochemistry 58 Space Infrared Telescope 58 Alpha Particle 58 Ocean Salinity 58 EarthCARE 58 Mars Climate Sounder 58 X ray observatory 58 Foton M3 58 Cassini Huygens 58 O OREOS 58 dexterous robot 58 Launch Scrubbed 58 Comet Hartley 2 58 Wilkinson Microwave Probe 58 Jupiter icy moons 58 Mars Odyssey spacecraft 58 galaxy M# [001] 58 Cosmic Vision 58 rocky extrasolar planet 58 Fermi Telescope 58 planets orbiting distant 58 Observatory STEREO 58 Microlensing 58 XMM Newton X ray 58 exo planet 58 Planck spacecraft 58 Imaging Spectrometer 58 Solar Terrestrial Relations 58 shuttle Endeavour STS 58 Venus Climate Orbiter 58 telescopic observations 58 orbital rendezvous 58 Uninhabited Aerial Vehicle 58 twin Voyager spacecraft 58 Saturn Cassini 58 orbiting Hubble Space Telescope 57 whiz harmlessly 57 LRO LCROSS 57 NASA Cosmic Background 57 plutoids 57 THEMIS satellites 57 geo stationary orbit 57 Martian rovers 57 ESA SMART 57 Shuttle Endeavor 57 spectroscopic observations 57 asteroid Steins 57 twin rover Opportunity 57 NASA rovers 57 X ray telescopes 57 Mars moon Phobos 57 spacecraft Cassini 57 Constellation Observing 57 highly elliptical orbits 57 Upsilon Andromedae 57 NIRCam 57 Exoplanet 57 Galileo spacecraft 57 Pegasus XL 57 Viking Orbiter 57 Atlantis Undocks From 57 Field Infrared Survey 57 NASA Gamma ray 57 exoplanetary 57 Infrared Pathfinder Satellite 57 TDRS K 57 Climate Experiment GRACE 57 SPHERES 57 SINFONI 57 Kepler #b 57 radio occultation 57 NASA MESSENGER spacecraft 57 Origins Spectral Interpretation 57 Mars Orbiter 57 Cassini Huygens Mission 57 interplanetary missions 57 irregularly shaped asteroid 57 ChemCam 57 rover Spirit landed 57 HARPS spectrograph attached 57 Lunar Crater 57 OGLE TR #b 57 Mars orbiter 57 sized planets orbiting 57 VIRTIS 57 Heterodyne Instrument 57 Kuiper Belt Objects 57 S/# S1 57 Shuttle Docks 57 polar orbiting 57 Foton spacecraft 57 BBSNews #-#-# NASA 57 Context Camera 57 Saturnian moon Titan 57 COROT 7b 57 LRO spacecraft 57 HiRISE camera aboard 57 NEOWISE 57 MErcury Surface Space ENvironment 57 Telescope LSST 57 geosynchronous 57 Hubble Space telescope 57 Insat 3A 57 Hayabusa capsule 57 STEREO spacecraft 57 Spaceguard Survey 57 Zeta Ophiuchi 57 WMAP satellite 57 GOES N 57 orbiting observatory 57 highly elliptical orbit 57 New Horizons spacecraft 57 Keck telescopes 57 planetary missions 57 orbiting gamma ray 56 Mars rovers Opportunity 56 mu Arae 56 Stardust NExT 56 Investigation DIXI 56 airglow 56 planets Uranus 56 Pluto Eris 56 NASA Stardust NExT 56 microlensing 56 imaging spectrometer 56 Atlantis STS 56 robotic rovers 56 remote sensing satellite Resourcesat 56 mineralogical mapping 56 DMSP F# 56 Comet Hartley 56 Upsilon Andromedae b 56 Cosmic Origins Spectrograph COS 56 Ares IY 56 Mössbauer 56 Kuiper belt object 56 Synthetic Aperture Radar 56 DEIMOS 56 Libra constellation Vogt 56 Interstellar Boundary Explorer 56 Infrared Array Camera 56 Jules Verne ATV 56 SuperWASP 56 inch Samuel Oschin 56 Lunar Reconnaissance Orbiter Camera 56 ExoMars Trace Gas 56 Main Injector Neutrino 56 GOCE satellite 56 Mars Color Imager 56 Mars rover Curiosity 56 robotic explorer 56 Stardust spacecraft 56 ARRL AMSAT 56 probe Chang'e 56 astrometry 56 Neptune Uranus 56 ESA ASI 56 Wide Angle Search 56 polar orbiting satellites 56 DigitalGlobe WorldView 56 Earthlike planets 56 particle physics detector 56 Oefelein piloted 56 cosmic cannibal 56 Corot 7b 56 orbited Jupiter 56 ESA Huygens probe 56 airborne observatory 56 Observatory SDO 56 Messenger spacecraft 56 AMPERE 56 Epoxi 56 ultraviolet spectrograph 56 Atlantis undocks 56 comets orbiting 56 NASA Great Observatories 56 LCROSS mission 56 Gamma ray burst 56 KAGUYA 56 gaseous planet 56 NASA Landsat 56 LightSail 1 56 lunar landers 56 swingby 56 Cassini Equinox 56 gravitational microlensing 56 Landsat Data 56 NASA twin STEREO 56 UK DMC2 56 YORP effect 56 shuttle Endeavor 56 Beta Pictoris b 56 Foton M2 56 interstellar dust grains 56 onboard Chandrayaan 56 NASA twin rovers 56 spokesman Michael Braukus 56 Anisotropy Probe 56 closest flyby 56 planemos 56 NASA Cassini 56 Aboard Endeavour 56 Multi Object Spectrograph 56 Mini SAR 55 magnetic spectrometer 55 eyepiece #/#s f/#.# 55 WFC3 55 Optical Spectroscopic 55 Security Regolith Explorer 55 FASTSAT 55 NOAA GOES 55 Herschel Space 55 Epsilon Eridani 55 extrasolar planetary systems 55 orbiter Mars Odyssey 55 unmanned lunar orbiter 55 NASA Lunar Crater 55 extrasolar planets 55 Total Ozone Mapping 55 FORMOSAT 55 GOSAT 55 SELENE 55 GLAST spacecraft 55 Muchachos Observatory 55 Helioseismic 55 STORRM 55 Aqua satellite 55 WISE mapped 55 neutron spectrometer 55 binary asteroid 55 orbital resonance 55 Cosmic Evolution 55 nanosatellite 55 Gliese #e 55 GRAIL 55 weather satellite TIROS 55 TrES 4 55 CoRoT 55 Webb Telescope 55 STSS satellites 55 NROL 55 Cosmic Origins Spectrograph 55 Gliese #c 55 infrared telescope 55 Earth radii 55 EPOXI spacecraft 55 planets orbiting sun 55 THEMIS Images 55 innermost planet 55 Mars CRISM 55 Aerosol Polarimetry Sensor 55 spaceborne 55 Ares Orion 55 SMOS Soil Moisture 55 Orbiting Carbon Observatory 55 Profiler Suite OMPS 55 LightSail 55 X#B 55 discover Fomalhaut 55 HD#b 55 Mars Opportunity rover 55 robotic rover 55 XMM Newton 55 visit http:/saturn.jpl.nasa.gov 55 Discovery undocks 55 Astro E2 55 Helios 2B 55 GLAST 55 Delfi C3 55 flyby spacecraft 55 particle detector 55 Exoplanets 55 Landsat satellites 55 tidal bulge 55 infrared telescopes 55 SCISAT 55 xenon propellant 55 neutron detector 55 Ray Spectrometer 55 Uranus Jupiter 55 Aquarius SAC 55 Hubble 55 Orbital Express 55 Nasa Mars Reconnaissance 55 GPS IIF 55 Multi Object Spectrometer 55 KBOs 55 Super Earths 55 Atacama Large Millimeter Array 55 GIOVE B 55 Anisotropy Probe WMAP 55 Mars Pathfinder 55 Galileo constellation 55 TacSat 55 Mars Descent Imager 55 Facility SIRTF 55 stellar occultations 55 MESSENGER 55 SM4 55 Great Observatories 55 NASA Wilkinson Microwave 55 comet Churyumov Gerasimenko 55 ESA ERS 55 LORRI 55 spacecraft Chandrayaan 1 55 Gerhard Schwehm 55 spacecraft 55 BepiColombo joint 55 orbiting telescopes 55 CBERS 2B 55 entire Milstar constellation 55 E ELT 55 telescope atop Mauna 55 Mars Uranus 55 Earth orbiting satellites 55 orbiting Saturn 55 gravitational lenses 55 retrograde orbit 55 celestial observations 55 planets orbits 55 radial velocity technique 55 Advanced LIGO 55 waxing gibbous 55 solar corona 55 Cassini flybys 55 rover Opportunity 55 subsurface ocean 55 MARSIS radar 55 Launch Postponed 54 Space Shuttle STS 54 HIAPER 54 Mars Phobos 54 LCROSS spacecraft 54 PASADENA Calif. NASA 54 Hubble telescope 54 Greenbelt Md. manages 54 Exploration Vehicle 54 slender crescent 54 YU# 54 Galileo satellites 54 Interplanetary Internet 54 unpowered glider 54 NASA Lunar Prospector 54 http:/saturn.jpl.nasa.gov 54 C1XS 54 Impactor 54 GEochemistry 54 Endeavour STS 54 Mars orbiting spacecraft 54 HARPS N 54 QWIP 54 Gravity Probe B 54 NFIRE satellite 54 S/# P2 54 Saturn outermost moon 54 lidar instrument 54 Ian McShane Pillars 54 IKAROS 54 EPOXI 54 NASA Interstellar Boundary 54 Cassini Image 54 STIS 54 Martian lander 54 NASA ICESat 54 gamma ray spectrometer 54 STPSat 54 trans Neptunian objects 54 hyperspectral imager 54 crewed missions 54 Flyby 54 Cancri e 54 journal Meteoritics 54 Imaging Spectrograph 54 Adaptive optics 54 extrasolar planets orbiting 54 NICMOS 54 Decadal Survey 54 radial velocity method 54 QQ# 54 Extrasolar Planets 54 Nasa Kepler 54 Giovanni Cassini 54 Spacewatch 54 CoRoT satellite 54 Astrophysical 54 TanDEM X 54 Lunar Atmosphere 54 comets asteroids 54 lunar orbiting spacecraft 54 SELENE probe 54 spacecraft flyby 54 gamma ray observatories 54 MUSES C 54 JCSAT 9 54 THEMIS 54 NASA rovers Spirit 54 CBERS 54 Mission SRTM 54 Deep Impact comet 54 Explorer GALEX 54 Cosmic Background Explorer 54 Reusable Launch Vehicle 54 Arecibo radar 54 TSN PZ camera 54 Tropical Rainfall Measuring 54 Mars landers 54 HEO payload 54 Hubble Space 54 spiral galaxy Messier 54 spokesman Paul Foerman 54 MESSENGER MErcury Surface 54 Kepler Telescope 54 unmanned rover 54 CryoSat mission 54 exoplanet hunter 54 Red Rectangle 54 Resourcesat 2 54 Satellites GOES 54 Moon Mineralogy Mapper M3 54 Outer Planets 54 spacecraft SpaceShipTwo 54 Dyna Soar 54 GA6 54 SECCHI 54 Undocking 54 Mauna Kea Hawaii 54 circumlunar 54 Orbiter spacecraft 54 MESSENGER spacecraft 54 GOCE 54 Continuity Mission LDCM 54 retrograde orbits 54 Infrared Astronomy SOFIA 54 spaceplane 54 PSR J# 54 Neutron Spectrometer 54 spacecraft orbiting 54 Discovery STS 54 INSAT 3D 54 polarimetry 54 Reflection Radiometer 54 Extrasolar Planet Observation 54 Mercury Uranus 54 Vehicle CEV 54 JPL manages 54 AB Aurigae 54 Commander Sergei Volkov 54 RQ# 54 crewed spacecraft 54 ICESat 54 Polar Operational 54 aboard Taurus XL 54 SMOS mission 54 Infrared Telescope Facility 54 NASA Terrestrial Planet 54 smallest exoplanets 54 STP S# 54 Cometary 54 Quadrantid meteor shower 54 microshutters 53 Descent Imager Spectral Radiometer 53 Triangulum Galaxy 53 Evolution Explorer 53 Elenin 53 ESO VLT 53 ASTRA 1KR 53 SpaceshipTwo 53 Proxima Centauri 53 unmanned lunar 53 Pan STARRS 53 fainter objects 53 ESA Integral 53 Orbit Validation 53 lunar perigee 53 Huygens mission 53 coronagraph 53 Douglas Hudgins Kepler 53 manned lunar 53 Henize #-# 53 Planck telescope 53 TU# [002] 53 geo synchronous 53 CloudSat 53 Arabsat 5A 53 Comet Boethin 53 OGLE TR 53 Earthlike planet 53 dwarf spheroidal 53 Bug Nebula 53 Progress resupply 53 electric ion propulsion 53 Hubble gyroscopes 53 Nasa Deep Impact 53 Phobos Grunt mission 53 X ray Spectrometer 53 exoplanets orbiting 53 SPIRE instrument 53 equatorial orbit 53 NASA MErcury Surface 53 ESA XMM Newton 53 GQ Lupi 53 periodic dimming 53 INSAT 4CR 53 YES2 53 gravitational interaction 53 Alpha Magnetic Spectrometer 53 Aeronomy 53 Mastcam 53 elliptical polar 53 GJ#b 53 Neutron Detector 53 HIRES spectrometer 53 TerraSAR X satellite 53 meter Keck telescopes 53 Galilean moons 53 Astronauts Install 53 NASA Lunar Reconnaissance 53 Max Launch Abort 53 LSAM 53 Launch Abort System 53 Orbital Debris 53 submillimetre wavelengths 53 Skynet 5C 53 FalconSat 2 53 NPOESS Preparatory Project 53 SDSS telescope 53 Ranging MESSENGER spacecraft 53 asteroid Itokawa 53 Minotaur IV 53 ISS resupply 53 NIRSpec 53 Metop 53 CubeSat 53 Virgin Galactic unveils 53 Nustar 53 JIMO mission 53 Moderate Resolution Imaging 53 e MERLIN 53 Express orbiter 53 HiRISE image 53 sister rover Spirit 53 smoothest flattest spot 53 Wilkinson Microwave Anisotropy Probe 53 RXTE 53 Optus D3 53 DISR 53 CARTOSAT 53 distant supernovae 53 Saturn moons Enceladus 53 axial tilt 53 shuttle Discovery STS 53 Hubble observations 53 Galilean satellites 53 Proba 2 53 Permanent Multipurpose Module PMM 53 Mars Jupiter Uranus 53 OMEGA instrument 53 Sample Return 53 orbiting spacecraft 53 VIRTIS instrument 53 GLAST Burst Monitor 53 Compton Gamma Ray 53 ESA Mars 53 deorbiting 53 Cassini 53 nicknamed Xena 53 extrasolar planet 53 GJ #b [001] 53 Venus Neptune Uranus 53 Faint Object 53 Wolszczan 53 Security GMES 53 Characterization EPOCh 53 High Altitude Airship 53 Galaxy Evolution 53 MUOS satellite 53 Cartosat 2A 53 Steins asteroid 53 infrared spectrograph 53 Hubble Telescope 53 orbiting 53 TerraSAR X 53 spokesman Grey Hautaluoma 53 polarimetric 53 Jovian moons 53 flyby Cassini 53 WASP #b 53 SAR Lupe 53 geosynchronous satellite 53 NEAR Shoemaker 53 Hubble Space Telescope 53 lander rover 53 Lunar Exploration 53 extravehicular activities 53 Hubble servicing 53 Mars unfeasible 53 particle physics experiment 53 GEO satellites 53 Konacki 53 exoplanets planets 53 Shuttle undocks 53 ESA Huygens 53 Chang'eI 53 INSAT 3A 53 GJ #b [002] 53 interferometric observations 53 manned Shenzhou 53 Highly Adaptable Satellite 53 Spitzer infrared telescope 53 LOCAD PTS 53 Planck observatory 53 Samuel Oschin Telescope 53 CryoSat satellite 53 radar altimeter 53 Rosetta lander 53 Keck Telescopes 53 gravitational keyhole 53 Extrasolar 53 robotic explorers 53 field Infrared Survey 53 Operation IceBridge 53 mission Chandrayaan 53 Astrobotic 53 orbiting Mars 53 Mercury flybys 53 Kazakhstan Baikonur Cosmodrome 53 geostationary earth 53 lunar orbiter Chang'e 53 Planetary Fourier Spectrometer PFS 53 Heliophysics 53 Kuiper Belt Object 53 IceBridge 53 navigate autonomously 53 Mars rover 53 exoplanets 53 orbital eccentricity 53 GRB #B 53 ATV Johannes Kepler 53 Discovery undocking 53 planet Gliese #g 53 CoRoT 9b 53 telescope 53 GPS IIR M 53 SpaceX Dragon 53 X ray spectrometer 53 Solar Sail 53 countdown dress rehearsal 53 Shepherding Spacecraft 53 MG J# +# 53 asteroid 53 Ultraviolet Imaging Spectrograph UVIS 52 retroreflector 52 gravitational lens 52 penetrating radar 52 orbiting Hubble telescope 52 Charon Pluto 52 solar radii 52 ARGUS IR 52 rocket lunar orbiter 52 Cosmic Microwave Background 52 RISAT 52 DigitalGlobe WorldView 2 52 particle analyzers 52 lunar probes 52 Manned missions 52 ion propulsion 52 impactor spacecraft 52 Tod Strohmayer 52 asteroids orbiting 52 P/# A2 52 Array ALMA 52 Submillimeter Array 52 manned lunar voyage 52 manned lunar mission 52 engineer Yury Lonchakov 52 millisecond pulsar 52 Diviner instrument 52 Mars Lander 52 Canadian Julie Payette 52 NASA Orbiting Carbon 52 moons orbiting 52 STEREO mission 52 Kuiper belt objects 52 Io Europa Ganymede 52 Cygnus spacecraft 52 Earthscope 52 SCIAMACHY 52 Fermi Gamma ray 52 Pan STARRS telescope 52 Kepler 9b 52 interstellar dust samples 52 multiband imaging photometer 52 please visit www.theESA.com 52 UAVSAR 52 COSMO SkyMed 52 RBSP 52 WGS satellites 52 stellar occultation 52 UDFy # 52 spectrograph 52 Adaptive Optics 52 Recovery Experiment SRE 52 Kiruna Sweden 52 NAVSTAR Global Positioning System 52 Meteorological Satellite 52 HiRISE camera 52 Cosmic Origins 52 undocks 52 Crewmate Tracy Caldwell 52 reentry capsule 52 Geosynchronous 52 twin rovers 52 astro comb 52 Credits ESA 52 lunar orbiters 52 Robotic Exploration 52 Herschel telescope 52 SpaceX Dragon capsule 52 NASA Spacecraft 52 rover Spirit 52 exobiology 52 Huygens descent 52 decadal survey 52 Infrared Camera 52 XMM Newton satellite 52 exoplanet orbiting 52 gamma ray detector 52 dimensional atlas 52 Square Kilometer Array 52 flyby 52 constellation Eridanus 52 Lunar Rover 52 Hubble Space Telescopes 52 Boethin 52 Multispectral 52 geosynchronous orbit GEO 52 D CIXS 52 NASA GLAST 52 Smartest Machine 52 dimming starlight 52 adaptive optics 52 Comet Dust 52 International Linear Collider 52 Keck telescope 52 Solar Optical Telescope 52 BLG #L 52 Aerojet propulsion 52 permanently shadowed craters 52 Shuttle Endeavour docks 52 Chajnantor plateau 52 HARPS spectrograph 52 LOFAR 52 GPS Block IIF 52 galaxy formation 52 Venusian atmosphere 52 Ultraviolet Imaging Spectrograph 52 THEMIS spacecraft 52 Alphabus 52 Opportunity Mars rovers 52 Yahsat 1A 52 Lunar Surface 52 comets meteors 52 GOES satellites 52 spectrographs 52 aboard Atlantis 52 SMEX 52 Higgs boson particle 52 Deep Impact Extended 52 satellites orbiting Earth 52 Mission TRMM 52 engineer Timothy Kopra 52 galaxy M# [002] 52 Spaceguard 52 ESO La Silla 52 transiting planet 52 Rapid Intensification Processes 52 Galactic cosmic rays 52 CHIPSat 52 Laser Interferometer Gravitational Wave 52 robotic lander 52 Oceansat 2 52 lunar explorer 52 GSAT 5P 52 Heliospheric Observatory SOHO 52 Mars Uranus Neptune 52 prograde 52 RADARSAT 2 52 Orion Crew 52 THEMIS Image 52 Magnetic Imager HMI 52 uncrewed 52 Radiation Belt 52 Opportunity Mars rover 52 Viking Lander 52 Shenzhou VI craft 52 Chilean Atacama Desert 52 shepherding spacecraft 52 Spectroscopic Explorer 52 Triangulum 52 Environmental Satellite POES 52 Enceladus flyby 52 INTEGRAL satellite 52 infrared ultraviolet 52 geostationary orbits 52 robotic landers 52 Pad Abort 1 52 WFPC2