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(Click for frequent words.) 73 Cassini Huygens spacecraft 70 Lunar Reconnaissance Orbiter LRO 70 spacecraft Cassini 68 Cassini 68 Rosetta spacecraft 67 COROT 67 Galileo spacecraft 67 BepiColombo 66 NASA Cassini spacecraft 66 Convection Rotation 66 Kepler Mission 66 Huygens probe 66 Huygens mission 65 ESA Rosetta 65 ESA ASI 65 NASA Stardust spacecraft 64 planetary Transits 64 Huygens 64 Comet Hartley 2 64 Cassini spacecraft 64 NASA Cassini 64 Comet #P/Churyumov-Gerasimenko 64 Stardust spacecraft 64 Cassini Huygens Mission 64 New Horizons spacecraft 64 Voyager spacecraft 64 infrared observatory 64 spacecraft 63 orbital rendezvous 63 Saturnian moon Titan 63 EPOXI mission 63 NASA Kepler 63 orbiting Saturn 63 probe Huygens 63 XMM Newton 63 robotic spacecraft 63 visit http:/saturn.jpl.nasa.gov 63 Rosetta orbiter 63 orbiting observatories 63 Nasa spacecraft 62 ESA SMART 62 Deep Impact comet 62 JIMO 62 MESSENGER 62 Mars Reconnaissance Orbiter MRO 62 ray Space Telescope 62 Churyumov Gerasimenko 62 IBEX spacecraft 62 Orbiter LRO 62 Comet Hartley 62 Cassini Huygens mission 62 Planck satellite 62 ESA Huygens 62 orbiting spacecraft 62 Planck spacecraft 62 Lunar Prospector 62 Space Agency 62 orbiter Cassini 61 Cosmic Evolution 61 Huygens Probe 61 NASA MESSENGER spacecraft 61 NASA MESSENGER 61 Planetary Transits 61 ESA Integral 61 Kepler spacecraft 61 NASAs 61 CALIPSO 61 comet chaser 61 EPOCh 61 VIRTIS 61 Saturn moon 61 Phobos Grunt 61 Deep Impact Extended 61 NASA Deep Impact 61 NASA Kepler spacecraft 61 MARSIS 61 Giovanni Cassini 61 GOCE 61 comet Churyumov Gerasimenko 61 LCROSS mission 61 Observatory STEREO 60 Reconnaissance Orbiter 60 WMAP satellite 60 NASA Interstellar Boundary 60 Hubble Space Telescope HST 60 asteroid Vesta 60 ESA Planck 60 Relations Observatory STEREO 60 asteroid Itokawa 60 X ray observatory 60 Ulysses spacecraft 60 Viking landers 60 Messenger spacecraft 60 Kepler Space Telescope 60 Express orbiter 60 asteroid Steins 60 Saturn Cassini 60 flyby spacecraft 60 DIXI 60 NASA STEREO 60 Mars Orbiter 60 asteroid Eros 60 SMOS 60 SIRTF 60 NASA Lunar Prospector 60 Sojourner rover 60 orbiting 60 Flyby spacecraft 60 NASA THEMIS 60 Mars moon Phobos 60 lunar orbiter 60 NuSTAR 60 radio occultation 60 exoplanetary 60 Hubble Space telescope 60 Cryosat 60 Jupiter Icy Moons 60 Solar TErrestrial RElations Observatory 60 outer planets 60 EPOXI 60 NASA 59 ExoMars rover 59 infrared telescope 59 robotic explorer 59 http:/saturn.jpl.nasa.gov 59 Fermi Telescope 59 THEMIS satellites 59 gaseous planet 59 NASA Wilkinson Microwave 59 Interstellar Boundary Explorer 59 Lunokhod 59 Red Planet 59 unmanned lunar 59 WISE telescope 59 SPICAM 59 ESA Cluster 59 orbiting observatory 59 ESA XMM Newton 59 twin Voyager spacecraft 59 GALEX 59 orbiting gamma ray 59 orbiting Mars 59 Keck Interferometer 59 Mars Pathfinder lander 59 Ocean Salinity SMOS 59 Explorer WISE 59 Yinghuo 1 59 interplanetary spacecraft 59 http:/www.nasa.gov/cassini 59 Fermi telescope 59 GOCE satellite 59 Space Telescope GLAST 59 Nasa Kepler 59 Saturnian system 59 Great Observatories 59 Mars Pathfinder 59 Antenna LISA 59 SMOS Soil Moisture 59 Mars Reconnaissance Orbiter 59 ESA Mars 59 rovers Spirit 59 Pluto Charon 59 ExoMars 59 LOFAR 59 orbiting Hubble Space Telescope 59 MESSENGER spacecraft 59 THEMIS 59 Chandrayaan 59 infrared telescopes 58 gamma ray observatory 58 Martian surface 58 Comet Churyumov Gerasimenko 58 Gravity Probe B 58 Huygens lander 58 Nasa 58 spacecraft orbiting 58 EPOXI spacecraft 58 DISR 58 Climate Experiment GRACE 58 NASA LCROSS 58 Mars 58 Mars Odyssey 58 Galaxy Evolution 58 Mars rovers Spirit 58 ESA Huygens probe 58 Lunar Reconnaissance Orbiter 58 Deep Impact mission 58 Saturn rings 58 ringed planet 58 Cassini flyby 58 Solar Terrestrial Relations 58 Mars orbiter 58 Lunar Exploration 58 Infrared Array Camera 58 comet dust 58 ExoMars mission 58 orbited Jupiter 58 MUSES C 58 OSIRIS REx 58 Mars Odyssey spacecraft 58 LRO 58 spacecrafts 58 Hubble Space Telescope 58 NASA Solar Terrestrial 58 Ranging spacecraft 58 CoRoT satellite 58 SIM PlanetQuest 58 NASA Voyager spacecraft 58 GLAST 58 Foton M3 58 Herschel telescope 58 SOHO spacecraft 58 NASA Stratospheric Observatory 58 astronomical telescope 58 NASA Kepler telescope 58 Corot 7b 58 MESSENGER MErcury Surface 58 Orbiter MRO 58 NASA Cosmic Background 58 Hubble 58 HRSC 58 Infrared Astronomical Satellite 58 comet #P/Churyumov-Gerasimenko 58 robotic rover 58 asteroid Lutetia 57 APXS 57 planetary missions 57 Ocean Salinity 57 NASA EPOXI mission 57 ESO VLT 57 Hubble telescope 57 unmanned probes 57 lunar orbiters 57 Chandrayan 57 NASA Far Ultraviolet 57 unmanned spacecraft 57 Extrasolar Planet Observation 57 TanDEM X 57 Titan Saturn 57 WISE spacecraft 57 Infrared Pathfinder Satellite 57 Earthlike planets 57 orbiter 57 Saturn moons 57 Hinode 57 XMM Newton satellite 57 NASA rovers 57 Herschel Space Telescope 57 astronomers 57 Stardust NExT 57 NASA Fermi Gamma 57 Descent Imager Spectral Radiometer 57 outermost planets 57 NASA Lunar Reconnaissance 57 Epoxi 57 exo planet 57 Solar Orbiter 57 Space ENvironment GEochemistry 57 Laser Interferometer Gravitational Wave 57 Enceladus flybys 57 Shenzhou spacecraft 57 SELENE 57 celestial observations 57 Cassini Equinox 57 Mars# 57 rover Opportunity 57 Wilkinson Microwave Anisotropy Probe 57 Proba 2 57 Cloud Aerosol Lidar 57 Mars Color Imager 57 Spaceguard 57 Sensing Satellite LCROSS 57 Wolszczan 57 SCISAT 57 Orbiting Carbon Observatory 57 Hubble Telescope 57 Optical Gravitational Lensing Experiment 57 lunar missions 57 Mercury flyby 57 Mars Global Surveyor 57 Stardust capsule 57 Observatory SDO 57 crewed spacecraft 57 spacecraft flyby 57 Lunar Orbiter 57 Hubble observations 57 Comet Tempel 1 57 NASA twin rovers 57 UKIRT 57 JWST 57 lunar explorer 57 extrasolar 57 Southern Observatory ESO 57 O OREOS 57 Fomalhaut b 57 Jupiter Icy Moons Orbiter 57 particle detector 57 Sasselov 57 Apollo missions 57 Herschel Space 57 comet Wild 56 Mars Orbiter Camera 56 ESOC 56 Deep Impact eXtended Investigation 56 orbiting telescope 56 Viking Lander 56 circumlunar 56 Mars rovers 56 Mars orbiters 56 Mars Lander 56 detect gravitational waves 56 Kepler Telescope 56 comet flyby 56 Martian lander 56 HiRISE camera aboard 56 MARSIS radar 56 Hayabusa spacecraft 56 orbital insertion 56 JAXA 56 Anisotropy Probe 56 LRO spacecraft 56 Reflection Radiometer 56 MetOp 56 OSIRIS 56 extrasolar planet 56 MINOS 56 LCROSS 56 stellar occultations 56 Mars CRISM 56 Mars orbiting spacecraft 56 Mössbauer 56 Huygens descent 56 Cassini orbiter 56 #P/Churyumov-Gerasimenko 56 Near Infrared Camera 56 ESA Herschel 56 NASA Great Observatories 56 Krimigis 56 moon Titan 56 Solar Dynamics Observatory 56 Space Telescope 56 NASA rovers Spirit 56 Investigation DIXI 56 HiRISE 56 Mars Opportunity rover 56 dexterous robot 56 NASA rover Spirit 56 Herschel Planck 56 Foton M2 56 Comet Halley 56 orbiters 56 NASA Mars Reconnaissance 56 MAVEN 56 Mars lander 56 MErcury Surface Space ENvironment 56 Infrared Astronomy 56 planet Uranus 56 onboard Chandrayaan 56 Curiosity rover 56 Spitzer infrared telescope 56 Anisotropy Probe WMAP 56 laser altimeter 56 Array ALMA 56 Composite Infrared Spectrometer 56 David Southwood ESA 56 comet Hartley 2 56 Evolution Explorer 56 Fermi Gamma ray 56 THEMIS Images 56 imaging spectrometer 55 Virgo Cluster 55 Planetary Fourier Spectrometer PFS 55 Infrared Astronomy SOFIA 55 lunar orbit 55 Mauna Kea Hawaii 55 Galilean moons 55 robotic rovers 55 Emily Lakdawalla 55 NASA twin STEREO 55 Interior Laboratory GRAIL 55 SPHERES 55 Nasa Mars Reconnaissance 55 rocky extrasolar planet 55 Heliophysics 55 Spitzer Space Telescope 55 SDSS III 55 lunar surface 55 Sojourner Rover 55 Titan flyby 55 NASA Lunar Crater 55 Hayabusa probe 55 IceCube 55 OGLE TR #b 55 lander 55 Lunar Crater 55 radial velocity technique 55 innermost planet 55 STEREO spacecraft 55 enters lunar orbit 55 Rosetta comet chaser 55 Rosetta comet 55 X ray telescopes 55 closest flyby 55 NASA Opportunity rover 55 LISA Pathfinder 55 LORRI 55 HD #b [002] 55 Philae lander 55 SHARAD 55 GIOVE B 55 probe Chang'e 55 YES2 55 Ultraviolet Imaging Spectrograph UVIS 55 Envisat satellite 55 NanoSail D 55 Very Large Telescope 55 orbit insertion 55 Stardust NExT mission 55 Huygens spacecraft 55 Chang'eI 55 Solar System 55 Planck telescope 55 ATV Johannes Kepler 55 Galileo satellites 55 Total Ozone Mapping 55 Comet Machholz 55 Itokawa asteroid 55 UA Lunar 55 SuitSat 55 Jupiter flyby 55 Gliese #c 55 Spaceguard Survey 55 NFIRE 55 Space Infrared Telescope 55 International Space Station 55 NEOSSat 55 Lunar CRater Observation 55 Hubble Space 55 Terrestrial Planet Finder 55 ESA GOCE 55 nanosatellite 55 HiRISE camera 55 KAGUYA 55 Ranging MESSENGER spacecraft 55 Planck 55 Titan flybys 55 Opportunity rover 54 LIGO 54 Toutatis 54 LCLS 54 Ed Weiler NASA 54 Heterodyne Instrument 54 distant supernovae 54 Venusian atmosphere 54 NASA Spirit rover 54 cometary 54 Asteroid Itokawa 54 manned lunar landing 54 Comet Lulin 54 Voyager probes 54 CARTOSAT 54 spectroscopic observations 54 exo planets 54 CryoSat 54 GEochemistry 54 Kepler telescope 54 Stratospheric Observatory 54 ESA Envisat satellite 54 Exoplanet 54 Kepler 9c 54 ion propulsion 54 NASA Chandra 54 AKARI 54 Martian rover 54 Nasa Mars Odyssey 54 orbiting telescopes 54 THEMIS mission 54 spokesman Michael Braukus 54 comets asteroids 54 occultations 54 robot rovers 54 Borexino 54 Foing 54 Resolution Stereo Camera 54 comet nucleus 54 Cosmic Microwave Background 54 orbiting Hubble telescope 54 journal Meteoritics 54 ill fated Beagle 54 Compton Gamma Ray 54 Mars Atmosphere 54 twin rovers 54 High Resolution Imaging 54 ESA ERS 54 ASPERA 54 extrasolar planets 54 Helios 2B 54 sunlike star 54 gravitational lenses 54 Jet Propulsion Laboratory JPL 54 Martian crater 54 astrophysicists 54 NASA Mars Odyssey 54 ENVISAT 54 lunar landers 54 STEREO 54 NASA Mars Orbiter 54 Cosmic Background Explorer 54 rovers 54 Multi Object Spectrometer 54 spacecraft Chandrayaan 1 54 Gliese #d 54 Astro E2 54 Zeta Ophiuchi 54 Deep Impact probe 54 Bernard Foing 54 LADEE 54 manned lunar missions 54 Kepler observatory 54 Nasa Deep Impact 54 Jovian moons 54 astronomical observations 54 gravitational microlensing 54 Mars Rover 54 moon Charon 54 Hubble orbits 54 Mars rover 54 CHIPSat 54 ESO telescopes 54 asteroid 54 Saturnian moon 54 Cassini Orbiter 54 Atacama Large Millimeter submillimeter 54 flyby 54 Kuiper Belt Object 54 Hubble Space Telescopes 54 CloudSat 54 Cancri e 54 particle detectors 54 ExoMars Trace Gas 54 infrared astronomy 54 stratospheric balloon 54 interstellar particles 54 Astrophysics MOA 53 Alpha Magnetic Spectrometer 53 Saturn moon Enceladus 53 Isro 53 lunar probe 53 DubaiSat 1 53 radial velocity 53 NASA Orbiting Carbon 53 orbit 53 Flyby 53 AERONET 53 robotic lander 53 solar corona 53 X ray spectrometer 53 AMIE camera 53 EarthCARE 53 gravitational wave 53 Martian rovers 53 astrometry 53 Magnetospheric 53 Endeavour docked 53 Robotic Exploration 53 manned lunar 53 planemos 53 Itokawa 53 interstellar dust samples 53 SAR Lupe 53 TerraSAR X 53 Io Europa 53 Global Surveyor 53 Keck telescope 53 Giovanni Picardi 53 LCROSS spacecraft 53 astrobiologists 53 moon Mab 53 swingby 53 Werthimer 53 Japan NAOJ 53 THEMIS spacecraft 53 Mars landers 53 Moderate Resolution Imaging 53 NASA Gamma ray 53 Shuttle Discovery 53 BLG #Lb 53 rover Spirit 53 comet 53 supercomputer simulations 53 Earth asteroid Itokawa 53 Giovanni Schiaparelli 53 gamma ray telescope 53 Cassini flybys 53 Moon Mineralogy Mapper 53 reconnaissance orbiter 53 Spacecraft 53 Earth orbiting satellites 53 INTEGRAL 53 ISRO 53 WISE infrared 53 NASA Cassini orbiter 53 rover Curiosity 53 highly elliptical orbit 53 Discovery undocks 53 Exoplanets 53 Moon Mineralogy Mapper M3 53 COROT satellite 53 NASA ESA Hubble 53 TerraSAR X satellite 53 moons Phobos 53 Epsilon Eridani 53 HIAPER 53 Orbiter 53 Mars Climate Sounder 53 Context Camera 53 exosphere 53 smallest exoplanet 53 infrared spectrograph 53 LHC experiments 53 Deep Impact spacecraft 53 CBERS 53 Astrobotic 53 telescope 53 COBE satellite 53 exoplanet hunter 53 NASA ICESat 53 moons orbiting 53 Faint Object 53 Mars Phobos 53 Phobos 53 Opportunity rovers 53 pressurized module 53 asteroids Ceres 53 Epsilon Aurigae 53 RXTE 53 Orbiter spacecraft 53 DEPTHX 53 CRISM 53 AATSR 53 mu Arae 53 hypersonic speeds 53 aerobraking 53 Wide Angle Search 53 MicroFUN 53 Kuiper Belt Objects 53 interstellar dust grains 53 Paulo Nespoli 53 Characterization EPOCh 53 Jean Luc Margot 53 Adam Riess 53 martian 53 Atlantis undocks 53 Hakan Svedhem 52 Reflection Radiometer ASTER 52 Webb Telescope 52 icy moons 52 Martian arctic 52 WFC3 52 Dalcanton 52 ROCSAT 2 52 Mission SRTM 52 six wheeled rover 52 Spectrometer 52 particle physics detector 52 SpaceX Falcon 9 52 Pluto Kuiper Belt 52 KamLAND 52 Lunar Reconnaissance Orbiter Camera 52 NOAO 52 PASADENA Calif. NASA 52 microlensing 52 LCROSS Lunar Crater Observation 52 SPACECRAFT 52 Michael Studinger 52 moon Deimos 52 planets orbiting distant 52 Fuk Li Mars 52 Comet 9P/Tempel 1 52 GLAST telescope 52 Extragalactic 52 Kaguya 52 X ray telescope 52 Earth magnetosphere 52 gamma ray spectrometer 52 GOSAT 52 Cassini ultraviolet 52 STEREO mission 52 distant galaxy 52 C1XS 52 transiting exoplanets 52 Agency JAXA 52 NASA Stardust NExT 52 ESO Very Large Telescope 52 Jules Verne ATV 52 Keck Observatory 52 CryoSat satellite 52 Galilean satellites 52 Laser Interferometer Space 52 SCIAMACHY 52 airborne observatory 52 Landsat satellites 52 HiRISE image 52 exobiology 52 impactor spacecraft 52 Gerard Kuiper 52 NPO Lavochkin 52 SPACE SHUTTLE 52 NEAR Shoemaker 52 Martian arctic plains 52 JDEM 52 spiral galaxy Messier 52 lunar orbiter Chandrayaan 52 Gamma ray burst 52 NASA MErcury Surface 52 retrograde orbit 52 copper impactor 52 N. Rathnasree 52 microscopic imager 52 cosmological observations 52 Beta Pictoris b 52 Jenniskens 52 Shuttle Radar Topography 52 APEX telescope 52 satellites orbiting Earth 52 meteorological satellites 52 martian atmosphere 52 Atlantis Undocks From 52 ADM Aeolus 52 Main Injector Neutrino 52 extraterrestrial civilizations 52 Daniel Sacotte 52 Heliospheric Observatory SOHO 52 Elenin 52 amateur skywatchers 52 Tropical Rainfall Measuring 52 neutrino detectors 52 impactor 52 rover Sojourner 52 Manned Mission 52 magnetotail 52 lunar probe Chang'e 52 Astrosat 52 remote sensing satellites 52 Jovian moon 52 Neutron Spectrometer 52 lunar exploration 52 interplanetary missions 52 Viking Orbiter 52 Telescope LSST 52 Saturnian moons 52 comet particles 52 shepherding spacecraft 52 Shepherding Spacecraft 52 Cosmonaut Yuri Gagarin 52 Steins asteroid 52 Space Shuttle STS 52 particle smasher 52 Macroscale Interactions during 52 entered lunar orbit 52 robotic explorers 52 Nasa Jet Propulsion 52 Neutron Detector 52 windshield wiper maneuver 52 reentry capsule 52 icy comets 52 Horizons spacecraft 52 Andromeda Galaxy 52 HD#b 52 Orbital Express 52 Comet Boethin 52 mesosphere 52 twin STEREO spacecraft 52 SINFONI 52 Envisat satellites 52 LROC 52 Mini SAR 52 orbiter lander 52 Gravitational lensing 52 Mastcam 52 Manned missions 52 ST5 52 ChemCam 52 Alpha Particle 52 AMASE 52 inhabitable planets 52 Europa Orbiter 52 comet Lulin 52 Junichiro Kawaguchi 52 Imaging Spectrometer 52 noctilucent clouds 52 ROSAT 52 Martian orbit 52 Oceansat 2 52 LightSail 52 mission Chandrayaan 51 NASA Jet Propulsion Laboratory 51 National Astronomical Observatory 51 LightSail 1 51 Martian soil 51 Charon Pluto 51 NASA Goddard 51 astrometric 51 Mars Surveyor 51 GJ #b [001] 51 Solar Optical Telescope 51 Solar Dynamics 51 manned Shenzhou 51 Hayabusa 51 Stephan Quintet 51 flybys 51 Climate Sounder 51 Professor Pillinger 51 ESA Envisat 51 Soyuz rocket 51 Peter Jenniskens 51 SPIRE instrument 51 P/# A2 51 aboard Skylab 51 HESS telescopes 51 STScI 51 Prof Pillinger 51 D CIXS 51 Advanced Spaceborne Thermal Emission 51 OSTM Jason 2 51 ATLAS detector 51 astrophysical phenomena 51 Shenzhou V spacecraft 51 Tempel 1 51 CoRoT 9b 51 SDSS telescope 51 Lutetia 51 RHESSI 51 Space Station Status 51 Pan STARRS 51 RQ# 51 Synthetic Aperture Radar SAR 51 moons orbiting Saturn 51 amateur astronomers peering 51 planet Gliese #g 51 twin rover Spirit 51 SMOS mission 51 twin rovers Spirit 51 Martian atmosphere 51 Samuel Ting 51 Extrasolar 51 Carl Marchetto 51 Spectrograph 51 Kaguya spacecraft 51 Keck telescopes 51 NASA Spacecraft 51 Hubble Near Infrared 51 Simonetta Di Pippo ESA 51 HARPS spectrograph attached 51 hunting Kepler telescope 51 Hayabusa capsule 51 CERN LHC 51 Wilkinson Microwave Probe 51 Cosmic Origins Spectrograph 51 Cometary 51 NROL 51 Svedhem 51 Jupiter moons 51 Hinode spacecraft 51 twin Viking landers 51 space shuttle Discovery 51 YU# 51 Astrophysical 51 Richard Gilbrech 51 Landsat satellite 51 planets circling 51 Lunar Orbit 51 Eagle lunar lander 51 UVIS instrument 51 VLBI 51 Discovery astronauts 51 ALMA antennas 51 Lunar Probe 51 Envisat 51 Russian Mikhail Tyurin 51 Hinode satellite 51 Extremely Large Telescope 51 Director Charles Elachi 51 orbits 51 spectrographs 51 director Chuck Dovale 51 planets moons 51 cosmic particles 51 VORTEX2 51 comet Tempel 1 51 Planck observatory 51 exoplanet 51 stellar occultation 51 Bepi Colombo 51 highly elliptical orbits 51 Kazakhstan Baikonur Cosmodrome 51 ARTEMIS 51 Jupiter Ganymede 51 Alpha Magnetic Spectrometer AMS 51 Pilot George Zamka 51 orbiting Cassini spacecraft 51 lander rover 51 Kuiper belt objects 51 Ultraviolet Imaging Spectrograph 51 WASP #b 51 flyby Cassini 51 Brookhaven Relativistic Heavy 51 Facility SIRTF 51 Decadal Survey 51 VISTA telescope 51 Neutral Mass Spectrometer 51 Rosetta lander 51 exoplanets 51 TrES 4 51 Victoria Crater 51 Mars rover Opportunity 51 hypersonic flight 51 Yuri Shargin 51 weather satellite TIROS 51 spaceward 51 nanosatellites 51 Grammier 51 Chandrayaan II 51 Martian terrain 51 Foton spacecraft 51 comet Wirtanen 51 Rover MER 51 Chandra X ray 51 Mars Odyssey orbiter 51 Giove B 51 CoRoT 51 TrES 51 Japan Hayabusa spacecraft 51 specialists Scott Parazynski 51 Hale Bopp 51 Saturnian 51 radioisotope thermoelectric generators 51 Diviner instrument 51 Gerhard Schwehm 51 hubble 51 unmanned lunar orbiter 51 planetary science 51 telescopes astronomers 51 Earthlike planet 51 Asteroid Probe 51 Samuel Oschin Telescope 51 NIRSpec 51 meteoroid 51 Servicing Mission 51 Cosmic Origins Spectrograph COS 51 transiting exoplanet 51 NASA Lunar CRater 51 Jean Pierre Lebreton Huygens 51 NASA WMAP 51 Shallow Subsurface Radar 51 Kliper 51 extrasolar planetary systems 51 COSMO SkyMed 51 Fermi LAT 51 lander Philae 51 neutron spectrometer 51 coronagraph 51 cosmic phenomena 51 durable twin rovers 51 Thermal Emission Spectrometer 51 Volatile Evolution 51 SDSS II 51 unmanned rover 51 telescopes 51 ESTRACK 51 HUDF 51 alien civilizations 51 Jean Pierre Lebreton 51 X ray observatories 51 Foton M3 mission 51 OGLE 51 Resourcesat 2 51 Martian rocks 51 Endeavour undocks 51 Infrared Astronomical Satellite IRAS 51 Large Hadron Collider LHC 51 Russian cosmonaut Yuri Usachev 51 GRB #B 51 MetOp satellite 51 polar orbiting 51 interstellar dust 51 ESO PR 51 lunar probes 51 comet chaser Rosetta 51 SuperWASP 51 Extrasolar Planet Search 51 HIRES spectrometer 51 FORCAST 51 X ray Observatory 51 Kiruna Sweden 51 ATV Jules Verne 51 Earth Asteroid 50 hexagonal mirrors 50 particle physics experiments