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(Click for frequent words.) 61 gaseous planet 59 comet #P/Churyumov-Gerasimenko 58 asteroid Lutetia 58 Comet Halley 58 COROT 58 HD#b 57 Fomalhaut b 56 Kepler #b 56 Churyumov Gerasimenko 56 CoRoT 7b 56 Comet #P/Churyumov-Gerasimenko 56 Quaoar 56 smallest exoplanet 56 Omega Centauri 56 S/# P2 56 constellation Taurus 56 Corot 7b 55 asteroid Vesta 55 WASP #b 55 Toutatis 55 Gliese #d 55 comet nucleus 55 protoplanet 55 CoRoT satellite 55 asteroid Steins 54 trans Neptunian objects 54 elongated orbits 54 Rosetta spacecraft 54 ESA Rosetta 54 comet 54 COROT 7b 54 Comet Tempel 1 54 spiral nebulae 54 moons Phobos 54 exoplanets orbiting 54 HD #b [002] 54 E ELT 54 comet chaser 54 celestial sphere 53 Hale Bopp 53 Antennae Galaxies 53 star Gliese 53 Kuiper Belt object 53 icy moons 53 CoRoT 53 Saturn Cassini 53 comet Wild 53 occultations 53 Gliese #g 53 Lunar Reconnaissance Orbiter LRO 53 Methone 53 Comet Hartley 2 53 Rosetta orbiter 53 Comet Hartley 53 planet Uranus 53 TrES 4 53 Syrtis Major 53 Galilean satellites 52 asteroid Itokawa 52 constellation Virgo 52 Ring Nebula 52 galaxy M# [002] 52 transiting planet 52 perihelion 52 Viking Lander 52 BLG #Lb 52 innermost planet 52 distant galaxy 52 GJ #b [001] 52 radial velocity 52 Titan flyby 52 spiral galaxy NGC 52 Epsilon Eridani 52 extrasolar planet 52 planets orbiting 52 planet orbits 52 KBOs 52 Proxima Centauri 52 moonlet 52 Corot 52 Giovanni Schiaparelli 52 comet Churyumov Gerasimenko 52 Itokawa 52 CoRoT #b 52 HARPS spectrograph 52 Earth asteroid Itokawa 52 GJ#b 52 Zeta Ophiuchi 51 GA6 51 SIRTF 51 asteroid belt 51 Jupiter Ganymede 51 planetary nebulae 51 unaided eye 51 P/# A2 51 Cassini Huygens 51 Corot 9b 51 GALEX 51 Trojan asteroids 51 infrared telescopes 51 Kuiper belt objects 51 Kuiper belt 51 VIRTIS 51 Convection Rotation 51 Andromeda Galaxy 51 Cassini flyby 51 outermost planets 51 Gliese #c 51 planemos 51 Shackleton crater 51 RQ# 51 OGLE TR 51 red supergiant 51 Kepler 9c 51 Pluto Charon 51 #P/Churyumov-Gerasimenko 51 star Proxima Centauri 51 Grenoble Observatory 51 Epsilon Aurigae 51 rocky planets 51 Gliese #e 51 cluster NGC 51 Quadrantids 51 stellar occultations 51 interstellar dust particles 51 exo planets 51 Planck satellite 50 AU Mic 50 Pluto Eris 50 Comet Machholz 50 Apophis 50 Herschel telescope 50 CoRoT 9b 50 moon Titan 50 HiRISE image 50 asteroid 50 Galileo spacecraft 50 Voyager spacecraft 50 eclipsing binaries 50 Sedna 50 supergiant star 50 mu Arae 50 exoplanets 50 elliptical orbits 50 Comet Lulin 50 constellation Andromeda 50 WD5 50 HL Tau 50 Martian meteorites 50 constellation Hercules 50 moon Ganymede 50 Kuiper Belt Object 50 Orion nebula 50 exoplanet 50 Cassini 50 Beta Pictoris 50 Cancri 50 flyby 50 Huygens mission 50 zodiacal light 50 carbonaceous chondrite 50 Halley comet 50 Comet Holmes 50 carbonaceous chondrites 50 COROT exo 3b 50 orbits 50 Galilean moons 50 distant quasar 50 Tunguska asteroid 50 Mpc 50 GRB #B 50 AB Aurigae 50 # Apophis 50 NASA Voyager spacecraft 50 Orion Nebula 50 exosolar planets 50 closest flyby 50 extrasolar planets 50 comet McNaught 50 Comet NEAT 50 Andromeda galaxy 50 heavily cratered 50 Comet Churyumov Gerasimenko 50 planet HD #b 50 intrinsic brightness 50 LORRI 50 QQ# 49 Planetary Transits 49 Charon Pluto 49 Upsilon Andromedae 49 Saturnian moons 49 astronomical telescope 49 constellation Aquarius 49 Meridiani Planum 49 Jovian moons 49 Saturn rings 49 Sojourner rover 49 Martian equator 49 XMM Newton 49 Kuiper Belt 49 Orionids 49 Voorwerp 49 flyby spacecraft 49 Herschel Space Telescope 49 Cepheid variables 49 MN4 49 Pinwheel Galaxy 49 Earthlike planet 49 Huygens lander 49 orbiting Hubble Space Telescope 49 luminous galaxies 49 X ray observatory 49 constellation Ursa Major 49 BepiColombo 49 phyllosilicates 49 La Silla Chile 49 Pleiades cluster 49 rover Opportunity 49 constellation Sagittarius 49 brown dwarf 49 Muchachos Observatory 49 Jacques Laskar 49 Dumbbell Nebula 49 ESO VLT 49 P Churyumov Gerasimenko 49 BP Psc 49 spacecraft flyby 49 Hot Jupiters 49 constellation Cassiopeia 49 retrograde orbit 49 Pleiades star 49 ESA Mars 49 Venusian surface 49 Cassini Huygens spacecraft 49 Shoemaker Levy 49 Epimetheus 49 constellation Auriga 49 Itokawa asteroid 49 asteroidal 49 ringed planet 49 stellar occultation 49 Triangulum 49 comets orbiting 49 Lunokhod 49 lunar equator 49 Arches Cluster 49 infrared wavelengths 49 moon Charon 48 distant supernovae 48 ejecta blanket 48 Beta Pictoris b 48 globular cluster 48 arcseconds 48 rocky extrasolar planet 48 Eta Carinae 48 eclipsing binary 48 Jenniskens 48 globular clusters 48 giant elliptical galaxy 48 GQ Lupi 48 asteroids 48 Tempel 1 48 Jovian moon 48 planet WASP #b 48 Oort cloud 48 Tarantula Nebula 48 Cancri e 48 HD #b [001] 48 microlensing events 48 planet Gliese #c 48 galaxy M# [001] 48 Venusian 48 ESA ASI 48 Pierre Simon Laplace 48 Eagle Nebula 48 Lagoon Nebula 48 Southern Observatory ESO 48 Kepler spacecraft 48 habitable planets 48 Deep Impact eXtended Investigation 48 Haumea 48 GOCE 48 Baptistina 48 lunar craters 48 Eta Aquarid meteor shower 48 extrasolar 48 High Accuracy Radial 48 S/# S1 48 Earth asteroids 48 MARSIS 48 YU# 48 Antiope 48 lunar meteorite 48 thin crescent 48 orbiting Mars 48 ah dus 48 Quadrantid meteor shower 48 MESSENGER spacecraft 48 Gliese 48 Dominique Cassini 48 Isidis Planitia 48 Gusev crater 48 astrometric 48 Earthlike planets 48 asteroid Eros 48 SN #A 48 spectroscopically 48 Giovanni Cassini 48 highly elliptical orbit 48 terrestrial planets 48 Betelgeuse 48 Virgo Cluster 48 Fornax cluster 48 Gondolo 48 Nili Fossae 48 ESA comet chaser 48 arcsecond 48 Ontario Lacus 48 inhabitable planets 48 chondrites 48 Very Large Telescope 48 occulted 48 APXS 48 constellation Lyra 48 constellation Leo 48 Stardust spacecraft 48 dwarf galaxies 48 planetoid 48 planets Uranus 48 noctilucent clouds 48 orbital eccentricity 48 Wolszczan 47 transiting planets 47 Milky Way galaxy 47 planet orbiting 47 moons orbiting 47 gaseous planets 47 NASA Stardust spacecraft 47 impactors 47 Messenger spacecraft 47 astronomical objects 47 Jupiter moons 47 Arabia Terra 47 orbiting 47 spiral galaxy 47 irregularly shaped asteroid 47 HAT P 47 constellation Carina 47 Opportunity rover 47 Makemake 47 Meridiani 47 Fomalhaut 47 Delta Cephei 47 Apophis asteroid 47 moons Io 47 asteroids orbiting 47 observable universe 47 comet chaser Rosetta 47 celestial object 47 Gerard Kuiper 47 exoplanets planets 47 Christophe Lovis 47 ejecta 47 Red Planet 47 HARPS spectrograph attached 47 sunlike star 47 Virgo cluster 47 Mimas 47 Large Magellanic Cloud 47 galaxy NGC 47 durable twin rovers 47 inner asteroid belt 47 OGLE TR #b 47 NEAs 47 twin Voyager spacecraft 47 Victoria Crater 47 Mars moon Phobos 47 SN #gy 47 constellation Scorpius 47 Nasa spacecraft 47 TrES 47 Marchis 47 astronomer Johannes Kepler 47 moons Europa 47 brown dwarfs 47 planet TrES 47 lunar meteorites 47 ExoMars 47 moon Phobos 47 Steins asteroid 47 Sasselov 47 Viking orbiters 47 asterism 47 ESA XMM Newton 47 Enceladus 47 spacecraft Cassini 47 Helix Nebula 47 globulars 47 Saturnian moon Titan 47 Orbiter MRO 47 GRB # 47 TU# [002] 47 zodiac constellations 47 extrasolar planetary systems 47 Hubble Ultra 47 Crab Nebula 47 perigee 47 LCROSS 47 Optical Spectroscopic 47 planets orbiting sun 47 Olympus Mons 47 GRBs 47 Wolf Rayet stars 47 Interstellar Boundary Explorer 47 Coma Cluster 47 SOHO spacecraft 47 gamma ray burst 47 plutoids 47 Spitzer Space Telescope 47 waxing crescent moon 47 EPOXI spacecraft 47 supernova explosion 47 Io Europa Ganymede 47 ecliptic plane 47 aphelion 47 Rosetta lander 47 ESO Very Large Telescope 47 Eridani 47 Mars Reconnaissance Orbiter MRO 47 Phobos 47 N. Rathnasree 47 Bonneville Crater 47 Bug Nebula 47 exoplanetary 47 NEOs 47 Leonid meteor showers 47 l' Eau 47 Comet Hale Bopp 47 Observatoire de Paris 47 waning gibbous 47 sols 47 lunar perigee 47 comet flyby 47 galactic clusters 47 supernova SN 47 lander rover 47 NASA Cassini spacecraft 46 SCIAMACHY 46 Upsilon Andromedae b 46 constellation Centaurus 46 New Horizons spacecraft 46 OMEGA instrument 46 sunlike stars 46 SHARAD 46 Ranging spacecraft 46 Titan Saturn 46 coronagraph 46 Hellas Basin 46 cosmological distances 46 Heliospheric Observatory SOHO 46 AGNs 46 Io Europa 46 Kuiper Belt objects 46 exoplanet orbiting 46 planetary nebula 46 super Earths 46 constellation Pegasus 46 Planck telescope 46 gravitationally bound 46 Alessandro Morbidelli 46 Helix nebula 46 gamma ray observatory 46 pallasite 46 brightest supernova 46 HIP #b 46 Mars 46 G#.# +#.# 46 HIRES spectrometer 46 Hubble Space Telescope HST 46 Space Telescope 46 distant quasars 46 Orionid 46 NGC# 46 NASA twin rovers 46 Extremely Large Telescope 46 twin rover Opportunity 46 ULIRGs 46 comet Lulin 46 GOCE satellite 46 planets 46 Solar TErrestrial RElations Observatory 46 elemental abundances 46 Jupiter moon Io 46 Europa Ganymede 46 Oort Cloud 46 ultraluminous galaxy 46 Pegasi 46 Explorer WISE 46 Lunar Prospector 46 Descent Imager Spectral Radiometer 46 GJ #b [002] 46 orbiting gamma ray 46 barred spiral galaxy 46 Collioure 46 Fermi telescope 46 reionization 46 Late Heavy Bombardment 46 spacecraft 46 MUSES C 46 planets orbits 46 Endeavour Crater 46 starlike object 46 Solar Terrestrial Relations 46 comets 46 arcminutes 46 orbiting telescope 46 Jupiter icy moons 46 Ulysses spacecraft 46 Nasa Kepler 46 BP Piscium 46 astronomers 46 arcsec 46 cosmic cannibal 46 Milky Way Galaxy 46 OGLE 46 orbited Jupiter 46 interstellar particles 46 ellipse 46 Elenin 46 spectroscopic observations 46 lunar orbits 46 Mandushev 46 Huygens 46 Venusian atmosphere 46 Tarantula nebula 46 Rue du Faubourg 46 Scorpii 46 moon Io 46 Jean Pierre Bibring 46 Saturnian system 46 Advanced Synthetic Aperture 46 NASA Kepler spacecraft 46 Doradus 46 Cryosat 46 astronomer Galileo Galilei 46 SPICAM 46 lensing galaxy 46 elliptical galaxies 46 LADEE 46 Helios 2B 46 Orbiter LRO 46 planetoids 46 Cabeus crater 46 Viking landers 46 asteroid flyby 46 ESA GOCE 45 UDFy # 45 Galaxy Evolution 45 galaxy cluster 45 VY Canis Majoris 45 Triangulum Galaxy 45 Saturnian moon 45 elongated orbit 45 Monoceros 45 starburst galaxy 45 Deep Impact craft 45 SIM PlanetQuest 45 Epsilon Indi 45 circular orbit 45 spacecraft orbiting 45 Palais des Papes 45 interstellar dust grains 45 Hubble observations 45 XO 3b 45 Mars Squyres 45 Milky Way 45 gibbous 45 gibbous moon 45 Infrared Astronomy 45 constellations Cygnus 45 constellation Cetus 45 interacting galaxies 45 Jean Pierre Lebreton 45 slender crescent 45 star Beta Pictoris 45 spiral galaxy Messier 45 Shackleton Crater 45 WMAP satellite 45 planets astronomers 45 subsurface ocean 45 constellation Eridanus 45 Carrefour de l' 45 outer planets 45 hot Jupiters 45 Comet Encke 45 cometary material 45 ESO telescope 45 optical telescopes 45 Gran Telescopio Canarias 45 moonlets 45 Brahe 45 Express orbiter 45 Deep Impact flyby spacecraft 45 NASA rovers Spirit 45 MOLA 45 SDSS II 45 planetary Transits 45 Borealis basin 45 Perseid shower 45 Planetary Fourier Spectrometer PFS 45 quasars 45 comet Hartley 2 45 Cosmic Origins Spectrograph COS 45 Proba 2 45 Eta Aquarids 45 Serpens Cauda 45 Mars Phobos 45 celestial bodies 45 NEAR Shoemaker 45 UB# [003] 45 potentially habitable 45 Mössbauer 45 lunar highlands 45 Orion constellation 45 Herschel Space 45 Mini SAR 45 Hipparcos 45 Saturnian 45 comet Tempel 1 45 millisecond pulsar 45 NASA rovers 45 planets Kepler 45 Jupiter Saturn 45 Earth Asteroid 45 highly elliptical orbits 45 Cassini spacecraft 45 thin crescent moon 45 X ray binary 45 Flyby spacecraft 45 WISE infrared 45 Earth radii 45 basaltic rocks 45 Mars Pathfinder lander 45 lunar crust 45 Anisotropy Probe WMAP 45 OSIRIS REx 45 Kepler Telescope 45 Earth asteroids NEAs 45 ExoMars mission 45 tau neutrinos 45 X ray spectrometer 45 journal Meteoritics 45 twin moons Phobos 45 spiral galaxies 45 Philae lander 45 astronomer Percival Lowell 45 elliptical galaxy 45 planets circling 45 duck billed hadrosaur 45 Christiaan Huygens 45 retrograde orbits 45 asteroid Ceres 45 radio occultation 45 planets asteroids 45 TNOs 45 pronounced elongation 45 DISR 45 redshift 45 COROT satellite 45 outermost planet 45 Saturn moon 45 Saturn moon Enceladus 45 Eridanus 45 probe Huygens 45 habitable zones 45 sized planets orbiting 45 Cloud Aerosol Lidar 45 Trifid Nebula 45 du Louvre 45 meteoritic material 45 Compact Reconnaissance Imaging Spectrometer 45 albedo reflectivity 45 RY Sagittarii 45 merging galaxies 45 annular eclipse 45 Heliospheric Observatory 45 impactor 45 neutral mass spectrometer 45 Observatory STEREO 45 moons 45 Cygnus Lyra region 45 Valles Marineris 45 KH #D 45 ESA Huygens probe 45 Swift Tuttle 45 planets orbiting distant 45 Cygnus X 45 hominid fossil 45 Earthlike 45 martian 45 super perigee moon 45 Vastitas Borealis 45 Titan flybys 45 Mini Thermal Emission 45 constellation Cygnus 45 R#a# 45 ESO telescopes 45 exoplanet hunter 45 Encke gap 45 gravitational perturbations 45 orbiting observatories 44 Earth Asteroid Rendezvous 44 RS Ophiuchi 44 Space ENvironment GEochemistry 44 Saturn moons Titan 44 infrared telescope 44 Cosmic Microwave Background 44 NASA EPOXI mission 44 starburst galaxies 44 ecliptic 44 star Spica 44 Tycho Brahe 44 cometary 44 orbiting Hubble telescope 44 Terra Meridiani 44 Aristarchus 44 Ocean Salinity SMOS 44 solar radii 44 look distractingly cartoony 44 Ultraviolet Imaging Spectrograph UVIS 44 Lulin 44 volcanic moon Io 44 Argentinosaurus 44 Geminid 44 Martian crater 44 Extrasolar planets 44 La Silla observatory 44 permanently shadowed 44 Europa Orbiter 44 extrasolar planets orbiting 44 waxing crescent 44 gravitational lenses 44 Comet Elenin 44 plagioclase 44 microquasar 44 Earth swingby 44 orbits Saturn 44 blazar 44 Infrared Astronomical Satellite 44 Samuel Oschin Telescope 44 Mauna Kea Hawaii 44 Neptune Uranus 44 Infrared Pathfinder Satellite 44 Martian terrain 44 SNR #-#.# 44 ESO PR 44 LAGEOS 44 NASA MESSENGER spacecraft 44 impactor spacecraft 44 twin rover Spirit 44 Great Orion Nebula 44 rock outcrop 44 Flyby 44 Red Rectangle 44 NASA Wilkinson Microwave 44 Imaging Spectroradiometer MODIS instrument 44 Martian surface 44 astronomer Ptolemy 44 X ray wavelengths 44 constellation Coma Berenices 44 exoplanetary systems 44 moon Europa 44 DIXI 44 meteoroids 44 Venus transits 44 S/# [001] 44 HRSC 44 asteroids Ceres 44 hydrated minerals 44 Solar System 44 globular star 44 telescope Uranus 44 constellation Aquila 44 Sojourner Rover 44 Asteroid Itokawa 44 ESA Huygens 44 Cydonia region 44 Curiosity rover 44 Coma Berenices 44 X ray telescopes 44 submillimetre wavelengths 44 orbiter Cassini 44 Cassini flybys 44 magnetars 44 CRISM 44 globular cluster M# 44 constellation Aries 44 distant galaxies 44 ROSAT 44 inner moons 44 Henize #-# 44 Kepler 44 galaxy clusters 44 constellation Cepheus 44 orbiting Saturn 44 bedrock outcropping 44 AKARI 44 celestial objects 44 magnetotail 44 dirty snowballs 44 Flagey 44 Chilean Atacama Desert 44 Wilkinson Microwave Probe 44 Taurids 44 Invalides 44 GEochemistry 44 Saturn moons 44 Astronomical Units 44 Edmond Halley 44 Saturn outermost moon 44 Parc de la 44 rover Spirit landed 44 tiny meteoroid 44 Resolution Stereo Camera 44 Carina constellation 44 meteorites 44 ALH# 44 microlensing 44 solar corona 44 Apollo missions 44 MetOp 44 transiting exoplanets 44 Global Surveyor spacecraft 44 Microscopic Imager 44 Mars Odyssey spacecraft 44 elliptical polar 44 fainter objects 44 exoplanet discoveries 44 rovers Spirit 44 heliopause 44 infrared spectra 44 Geminga 44 Manchester Jodrell Bank 44 Shepherding Spacecraft 44 Ringed Planet 44 whiz harmlessly 44 Kepler observatory 44 planets orbiting stars 44 NASA Cassini 44 foreground galaxy 44 supernova remnant 44 Lake Cheko 44 eccentric orbits 44 hypervelocity stars 44 Mars Orbiter Camera 44 solar nebula 44 smallest exoplanets 44 Solar Orbiter 44 KT boundary 44 flyby Cassini 44 PSR J# 44 annular solar eclipse 44 Hesperian Epoch 44 martian surface 44 reentry capsule 44 Astrophysical Institute 44 Maunder minimum 44 Small Magellanic Cloud 44 Carinae 44 Saturn innermost 44 VB #b 44 chondritic meteorites 44 Hubble Constant 43 Stephane Udry 43 astronomer Tycho Brahe 43 Kazantzidis 43 lander 43 Jupiter Saturn Uranus 43 planetary nebulas 43 GT9 43 moons orbiting Saturn 43 EGRET 43 Mini TES 43 Cosmic Evolution 43 Caloris 43 Beehive Cluster 43 Petit Palais 43 Infrared Astronomical Satellite IRAS 43 orbited 43 Adam Riess 43 moons Io Europa Ganymede 43 Wolf Rayet star 43 Herschel Planck 43 Enceladus flybys 43 Île de la 43 Comet Boethin 43 Tunguska Event 43 telescopic observations 43 Chenonceau 43 microscopic imager 43 Comet 9P/Tempel 1 43 neutron spectrometer 43 TW Hydrae 43 nebular 43 Hubble 43 star Fomalhaut 43 dwarf planet 43 aperture telescope 43 celestial equator 43 Hesperian epoch 43 Planck spacecraft 43 dwarf galaxy 43 gravitational microlensing 43 Geminid meteor showers 43 comet nuclei 43 Heterodyne Instrument 43 Titan smoggy 43 astronomical observatory 43 binary quasar 43 circumstellar disk 43 quasar 43 infrared observatory 43 SMM J# 43 Giove B 43 Higgs particle 43 supervolcanoes 43 Type Ia supernova 43 NASA Deep Impact 43 Planck 43 Horsehead Nebula 43 Envisat 43 Capricornus 43 interstellar dust 43 Roque de los 43 Basilica di 43 protoplanetary 43 Cassini orbiter 43 reflection nebula 43 TanDEM X 43 magma ocean 43 Martian rover 43 SELENE 43 astrobiological 43 habitable zone 43 Chicxulub crater 43 Tianyulong 43 Lake Vostok 43 particle smasher 43 Sensing Satellite LCROSS 43 spatially resolved 43 Noctilucent clouds 43 waning crescent moon 43 earthshine 43 NASA Far Ultraviolet 43 waxing gibbous moon 43 Tropical Rainfall Measuring 43 EPOXI 43 biosignatures 43 WISE mapped 43 airglow 43 LCROSS spacecraft 43 planetesimals 43 NFIRE satellite 43 Himiko 43 Deep Impact spacecraft 43 earthlike planets 43 chondrules 43 Meridiani plains 43 Phaethon 43 ultraviolet wavelengths 43 Murchison meteorite 43 constellation Monoceros 43 thrilling stargazers 43 Caloris Basin 43 NICMOS observations 43 Infrared Thermal Imaging Spectrometer 43 Laser Interferometer Gravitational Wave 43 magnetar 43 Type Ia 43 perigee moon 43 Milky Way halo 43 J# +# [002] 43 Lyrid meteor shower 43 extrasolar planet HD #b 43 Kuiper Airborne 43 Place Vendôme 43 jovian 43 unmanned probes 43 constellation Ara 43 periodic dimming 43 Edmund Halley 43 equatorial plains 43 Mars CRISM 43 submillimetre 43 Climate Sounder 43 constellation Gemini 43 martian meteorites 43 Gerhard Schwehm 43 geoneutrinos