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(Click for frequent words.) 76 exoplanet 76 exoplanets 74 extrasolar planets 73 HD #b [002] 71 planet orbiting 71 smallest exoplanet 71 planets orbiting distant 70 transiting planet 69 gaseous planet 69 Corot 7b 69 extrasolar 69 GJ #b [001] 69 planets orbiting 68 Gliese #c 68 transiting planets 68 HD#b 68 Gliese #g 68 Earthlike planets 67 WASP #b 67 rocky planets 67 Earthlike planet 67 brown dwarf 67 Kepler #b 66 Corot 9b 66 Gliese #d 66 Epsilon Aurigae 66 gamma ray burst 66 gravitational microlensing 66 transiting exoplanet 66 TrES 65 Fomalhaut b 65 planet HD #b 65 Fermi telescope 65 GRB #B 65 microlensing 64 exoplanetary 64 habitable planets 64 distant supernovae 64 super Earths 64 planet orbits 64 Comet Lulin 64 GJ#b 64 exoplanet orbiting 64 Earthlike 64 SN #gy 64 planets 63 moon Enceladus 63 PSR J# 63 magnetar 63 extrasolar planets orbiting 63 CoRoT 7b 63 planet Uranus 63 planets orbiting stars 63 Cancri e 63 radial velocity 63 COROT 63 planets orbiting sun 63 celestial object 63 Comet Holmes 63 exo planet 63 Kuiper Belt object 63 Gliese #e 63 BP Psc 63 brown dwarfs 63 CoRoT satellite 63 G#.# +#.# 63 Eta Carinae 63 Beta Pictoris b 63 star Gliese 63 X ray binary 62 planet Gliese #g 62 gamma ray observatory 62 Epsilon Eridani 62 Orion Nebula 62 SIRTF 62 NASA Kepler 62 Cancri 62 Sedna 62 CoRoT 9b 62 innermost planet 62 Goldilocks planet 62 UDFy # 62 Omega Centauri 62 GJ #b [002] 62 distant galaxy 62 moon Charon 62 eclipsing binary 62 TrES 4 61 Wolszczan 61 habitable planet 61 potentially habitable planets 61 GRB # 61 KBOs 61 BLG #Lb 61 planetary transits 61 XMM Newton 61 X ray wavelengths 61 red supergiant 61 exoplanets orbiting 61 radial velocity method 61 OGLE 61 galaxy cluster 61 Crab Nebula 61 astronomers 61 WIMPs 61 HD# [002] 61 Kuiper Belt Objects 61 supernova 61 comet McNaught 61 Gliese 61 Andromeda Galaxy 61 Comet Hartley 2 61 Spitzer Space Telescope 61 CoRoT 61 solar corona 61 planets circling 60 icy moons 60 Kuiper Belt Object 60 Kepler spacecraft 60 potentially habitable 60 Milky Way Galaxy 60 planetary Transits 60 Upsilon Andromedae b 60 planets astronomers 60 unaided eye 60 comet 60 spectroscopically 60 AU Mic 60 moons orbiting 60 GALEX 60 HAT P 60 brightest supernova 60 microlensing events 60 NASA Cassini spacecraft 60 Kuiper belt objects 60 quasar 60 millisecond pulsar 60 Upsilon Andromedae 60 Kuiper belt object 60 habitable worlds 60 Microlensing 60 distant galaxies 60 Quaoar 60 GRBs 60 smallest extrasolar planet 59 Beta Pictoris 59 P/# A2 59 constellation Virgo 59 Jovian moon 59 constellation Aquarius 59 distant quasars 59 Comet Hale Bopp 59 Venusian atmosphere 59 Jupiter moon Io 59 Astronomers 59 elliptical galaxy 59 Galilean satellites 59 distant quasar 59 globular cluster 59 Konacki 59 hot Jupiters 59 rocky extrasolar planet 59 planetary nebulae 59 exo planets 59 protoplanet 59 Saturn moon 59 astronomical objects 59 stellar occultation 59 noctilucent clouds 59 supernovae 59 OGLE TR 59 pulsars 59 Toutatis 59 SN #A 59 asteroid 59 Cosmic Microwave Background 59 Hanny Voorwerp 59 lightest exoplanet 59 cosmological distances 59 Milky Way galaxy 59 pulsar 59 COROT 7b 59 Orion nebula 59 NASA Kepler spacecraft 59 Exoplanet 59 Ulysses spacecraft 59 planemos 59 Saturn moon Enceladus 58 OGLE TR #b 58 neutrino 58 RXTE 58 exoplanets planets 58 AB Aurigae 58 gamma ray bursts 58 Pluto Charon 58 X ray emission 58 galaxy M# [001] 58 X ray observatory 58 galaxy NGC 58 X ray telescopes 58 Sasselov 58 Galilean moons 58 supernova remnant 58 Saturnian moon 58 earthlike planets 58 infrared telescope 58 axions 58 inhabitable planets 58 radial velocity technique 58 subsurface ocean 58 trans Neptunian objects 58 occultations 58 distant galaxy clusters 58 Fomalhaut 58 planet TrES 58 AGNs 58 exosolar planets 58 extrasolar planetary systems 58 orbiting Hubble Space Telescope 58 HiRISE image 58 SOHO spacecraft 58 Evolution Explorer 58 Martian meteorites 58 barred spiral galaxy 58 Enceladus 58 BLG #L 58 millisecond pulsars 58 dwarf galaxy 58 exosphere 58 exoplanets planets outside 58 terrestrial planets 58 merging galaxies 58 asteroidal 58 type Ia supernova 58 constellation Cassiopeia 58 globular clusters 58 Planck satellite 58 Saturn moons 57 Convection Rotation 57 VIRTIS 57 Stephan Quintet 57 ultraviolet wavelengths 57 HL Tau 57 MG J# +# 57 faint galaxies 57 stellar occultations 57 Arches Cluster 57 Type Ia supernova 57 NASA Wilkinson Microwave 57 Kepler 9c 57 Lulin 57 ray Space Telescope 57 moon Titan 57 Comet Hartley 57 Galaxy Evolution 57 SN #C 57 Cassini flyby 57 zodiacal light 57 Optical Gravitational Lensing Experiment 57 asteroid Vesta 57 Quadrantids 57 luminous galaxies 57 neutron star 57 extragalactic 57 BP Piscium 57 infrared observatory 57 planetoid 57 infrared spectra 57 Kepler telescope 57 sunlike star 57 quasars 57 constellation Centaurus 57 Saturn rings 57 hydrated minerals 57 HD #b [001] 57 Comet Machholz 57 Red Rectangle 57 galaxy M# [002] 57 Andromeda galaxy 57 habitable zone 57 Nasa spacecraft 57 ionized gas 57 Delta Cephei 57 electron neutrinos 57 moons Phobos 57 interstellar dust 57 GQ Lupi 57 lunar craters 57 ESO VLT 57 constellation Ursa Major 57 interstellar dust grains 57 infrared wavelengths 57 Super Earths 57 J# +# [002] 57 comet Hale Bopp 57 ESA XMM Newton 57 constellation Hercules 57 blazar 57 spectroscopic observations 57 spacecraft Cassini 56 fainter objects 56 extrasolar planetary 56 Orbiter LRO 56 RRATs 56 spiral galaxy NGC 56 NASA Far Ultraviolet 56 microquasar 56 Higgs particle 56 Oort cloud 56 CRISM 56 Antennae Galaxies 56 Triangulum Galaxy 56 Proxima Centauri 56 cosmic microwave background 56 galaxies 56 phyllosilicates 56 Oort Cloud 56 constellation Cygnus 56 WMAP satellite 56 supergiant star 56 ESA Integral 56 planetary nebula 56 Hubble observations 56 HiRISE camera aboard 56 Cassini Huygens 56 CoRoT #b 56 sunlike stars 56 Kuiper belt 56 Higgs bosons 56 starburst galaxies 56 Saturnian moon Titan 56 astronomer Clyde Tombaugh 56 orbiting gamma ray 56 galaxy clusters 56 comet nucleus 56 CMB radiation 56 TNOs 56 Titan Saturn 56 transiting exoplanets 56 HARPS spectrograph attached 56 Kuiper Belt objects 56 gravitational lenses 56 comets orbiting 56 lunar crust 56 muon neutrino 56 Wolf Rayet stars 56 reionization 56 HM Cancri 56 Saturn Cassini 56 APXS 56 protostar 56 magnetars 56 RS Ophiuchi 56 comet Lulin 56 Saturn magnetosphere 56 XTE J# 56 interstellar dust particles 56 Giovanni Cassini 56 planets Kepler 56 Planetary Transits 56 distant supernovas 56 Pegasi 56 #P/Churyumov-Gerasimenko 56 extrasolar planet HD #b 56 starburst galaxy 55 gravitational wave 55 airglow 55 neutralino 55 Zeta Ophiuchi 55 Maunder minimum 55 Hot Jupiters 55 geoneutrinos 55 retrograde orbit 55 metallicity 55 hypervelocity stars 55 Comet Halley 55 gravitational waves 55 Milky Way 55 rover Opportunity 55 Churyumov Gerasimenko 55 HiRISE camera 55 Cygnus X 55 Wolf Rayet star 55 ESO telescope 55 accretion disk 55 Wilkinson Microwave Anisotropy Probe 55 neutral mass spectrometer 55 Pieter van Dokkum 55 Geminids 55 coronagraph 55 celestial objects 55 habitable zones 55 Huygens descent 55 COROT exo 3b 55 constellation Cetus 55 photosphere 55 intracluster 55 UVOT 55 substorm 55 redshift 55 Cepheid variables 55 Orionids 55 antihelium 4 55 intrinsic brightness 55 UKIRT 55 Heliospheric Observatory SOHO 55 Diviner 55 EPOXI 55 celestial sphere 55 coronal loop 55 Large Magellanic Cloud 55 nebula 55 astronomical telescope 55 orbiting 55 attosecond 55 moonlets 55 X ray pulses 55 elliptical galaxies 55 Huygens mission 55 protostars 55 STEREO spacecraft 55 Samuel Oschin Telescope 55 Martian surface 55 NEAs 55 Saturn Enceladus 55 ESO PR 55 SDSS II 55 HIP #b 55 binary asteroid 55 supersymmetric particles 55 protoplanetary disk 55 Kepler Space Telescope 55 Comet Elenin 55 Solar System 55 Astrophysics Cambridge Mass. 55 Cassini spacecraft 55 cosmic cannibal 55 earthshine 55 orbiting observatories 55 constellation Sagittarius 55 galactic mergers 55 Hubble Space Telescope HST 55 planets orbits 55 Voyager spacecraft 55 Grillmair 55 Extrasolar planets 55 supernova explosion 55 astrometry 55 constellation Pegasus 55 constellation Lyra 55 comets 55 Bug Nebula 54 telescopes astronomers 54 Keck Interferometer 54 Opportunity rover 54 gaseous planets 54 moon Europa 54 S/# P2 54 aurorae 54 Henize #-# 54 Virgo Cluster 54 submillimeter 54 filamentary structure 54 sized planets orbiting 54 Supernova #A 54 exoplanetary systems 54 masers 54 SINFONI 54 Lunokhod 54 astronomical observations 54 ESA Mars 54 WISE telescope 54 HARPS 54 Hubble Ultra 54 stellar nurseries 54 Bruce Jakosky 54 eclipsing binaries 54 Gamma ray burst 54 constellation Carina 54 Cassini Huygens spacecraft 54 missing baryons 54 fainter 54 cosmic microwave radiation 54 KH #D 54 orbited Jupiter 54 Comet McNaught 54 ionized hydrogen 54 supermassive black hole 54 Solar TErrestrial RElations Observatory 54 blue supergiant 54 IRC +# 54 Anisotropy Probe 54 Explorer WISE 54 AKARI 54 Nasa Kepler 54 LORRI 54 spiral galaxy 54 jovian 54 Anisotropy Probe WMAP 54 spectroscopic 54 Galileo spacecraft 54 VB #b 54 lunar perigee 54 retrograde orbits 54 Gamma ray bursts 54 gravitationally bound 54 Tarantula Nebula 54 galaxy 54 Southern Observatory ESO 54 Fermi Gamma ray 54 elongated orbit 54 Trifid Nebula 54 perihelion 54 nebular 54 Hale Bopp 54 martian meteorites 54 Kepler Mission 54 permanently shadowed craters 54 Crab Pulsar 54 VY Canis Majoris 54 Kailash Sahu 54 X ray binaries 54 Sara Seager 54 spatially resolved 54 Elenin 54 interacting galaxies 54 UB# [003] 54 spectrographs 54 RQ# 54 mu Arae 54 cometary dust 54 sunspot 54 magnetic reconnection 54 moonlet 54 star Fomalhaut 54 constellation Scorpius 54 interstellar clouds 54 planet transits 54 Kepler 54 Voorwerp 54 Quadrantid meteor shower 54 IRAS 4B 54 supergiant stars 54 ringed planet 54 Hawking radiation 54 magma ocean 54 planets circling stars 54 dust enshrouded 54 carbonaceous chondrite 53 substorms 53 cryovolcanism 53 type Ia supernovae 53 RHESSI 53 X ray afterglow 53 Herschel Space Telescope 53 asterism 53 Jupiter moons 53 orbiting Saturn 53 laser altimeter 53 visible wavelengths 53 HIRES spectrometer 53 Ontario Lacus 53 gravitational lens 53 Charon Pluto 53 planet HD#b 53 Keck telescopes 53 photometer 53 subatomic particle 53 Type Ia supernovae 53 energetic cosmic rays 53 Mandushev 53 OMEGA instrument 53 icy comets 53 active volcanism 53 Rosette Nebula 53 Climate Experiment GRACE 53 silicate dust 53 Bullet Cluster 53 interplanetary spacecraft 53 V# Mon 53 astrophysicists 53 cluster NGC 53 infrared radiation 53 nucleosynthesis 53 Lagoon Nebula 53 comets asteroids 53 IceCube 53 Betelgeuse 53 Goldilocks zone 53 WISE infrared 53 NASA Cassini orbiter 53 SEGUE 53 comet Hartley 2 53 moon Io 53 crystalline silicates 53 interstellar cloud 53 X ray observatories 53 cosmic ray 53 boson 53 Mauna Kea Hawaii 53 arcminutes 53 detect gravitational waves 53 Composite Infrared Spectrometer 53 Mojzsis 53 supernova SN 53 Exoplanets 53 constellation Eridanus 53 SIM PlanetQuest 53 Halley comet 53 circumstellar disk 53 Sagittarius B2 53 NASA Fermi Gamma 53 X ray telescope 53 afterglows 53 Earth magnetotail 53 star Proxima Centauri 53 Keck telescope 53 nightglow 53 muon neutrinos 53 Fermi LAT 53 NASA EPOXI mission 53 polarimetry 53 Perseid shower 53 imaging spectrometer 53 Rosetta spacecraft 53 Magnetars 53 #gy 53 occulted 53 outermost planets 53 Cassini ion 53 GRB# 53 Gravitational waves 53 meteor fireball 53 arcsecond 53 Viking landers 53 Sombrero Galaxy 53 telescopic observations 53 NASA Chandra 53 Jenniskens 53 infrared telescopes 53 NASA Cassini 53 dwarf galaxies 53 Noctilucent clouds 53 infall 53 cosmic phenomena 53 MARSIS 53 optical telescopes 53 Wilkinson Microwave Probe 53 spectroscopic measurements 53 SuperWASP 53 stellar seismology 53 Pluto Eris 53 Lyrids 53 polar stratospheric 53 planets comets 53 telescope 53 sun corona 53 cometary 53 Milky Way halo 53 Geminga 53 Cepheids 52 muon 52 neutron spectrometer 52 strange quark 52 VISTA telescope 52 Mimas 52 shadowed craters 52 X ray spectrometer 52 ejecta 52 optical wavelengths 52 solar nebula 52 Lunar Prospector 52 photometry 52 tau neutrino 52 axion 52 NASA MESSENGER spacecraft 52 Jovian moons 52 orbiting Chandra 52 Descent Imager Spectral Radiometer 52 galactic cosmic rays 52 spacecraft flyby 52 ESA Rosetta 52 extrasolar worlds 52 WFC3 52 Spectrograph 52 occultation 52 gamma ray flares 52 constellation Auriga 52 La Silla Chile 52 planet WASP #b 52 protoplanetary disks 52 NASA twin rovers 52 Astrophysical Journal 52 Syrtis Major 52 Space Telescope 52 Lyman alpha 52 active galactic nuclei 52 Neptune Uranus 52 gravitational radiation 52 Comet NEAT 52 radial velocities 52 supernovas 52 slender crescent 52 magnetic monopoles 52 supersymmetric 52 Mössbauer 52 NASA Lunar Reconnaissance 52 constellation Taurus 52 Mercury flyby 52 nebulae 52 neutrino particles 52 planet Gliese #c 52 moons circling 52 SPICAM 52 Rayleigh scattering 52 gamma ray 52 IBEX spacecraft 52 redshifts 52 EPOXI spacecraft 52 polar vortex 52 adaptive optics 52 diffuse aurora 52 PSR B# +# 52 Astrophysical Journal Letters 52 star Beta Pictoris 52 binary quasar 52 inner asteroid belt 52 quark gluon plasma 52 periodic dimming 52 brightest comet 52 Cygnus Lyra region 52 nicknamed Xena 52 meteoroid 52 infrared spectrometer 52 Cosmic Microwave Background CMB 52 R Coronae Borealis 52 neutralinos 52 Orionid 52 antihydrogen atoms 52 HUDF 52 ROSAT 52 KamLAND 52 neutron stars 52 planet 52 spiral galaxy Messier 52 gravitational lensing 52 millimeter wavelength 52 Observatory telescope 52 proto galaxies 52 star Spica 52 cometary material 52 orbiting telescope 52 coronal loops 52 carbonaceous chondrites 52 Martian polar 52 optical interferometry 52 asteroids 52 rocky terrestrial planets 52 Lutetia 52 meteoritic material 52 hypervelocity star 52 highly elliptical orbits 52 Saturn outermost 52 magnetotail 52 Alfven waves 52 Mercury magnetosphere 52 ESO telescopes 52 aurora 52 William Borucki 52 THEMIS 52 Astrophysicists 52 gamma rays emitted 52 Jupiter icy moons 52 globular star 52 Extrasolar Planet Search 52 elongated orbits 52 EPOXI mission 52 submillimetre wavelengths 52 Planck spacecraft 52 Ring Nebula 52 meteorites 52 Dean Pesnell 52 magnetospheric 52 Planck telescope 52 lunar poles 52 Mini TES 52 constellation Andromeda 52 Cassini 52 optical telescope 52 infrared astronomy 52 Meridiani 52 Virgo cluster 52 Small Magellanic Cloud 52 smallest exoplanets 52 lunar meteorites 52 TW Hydrae 52 Hubble Telescope 52 active galactic nucleus 52 RS Oph 52 Hipparcos 52 circumstellar disks 52 PSR J# +# 52 VLTI 52 Using ESO Very 52 Titan flyby 52 pseudogap 52 TGFs 52 THEMIS mission 51 redshifted 51 WHIM 51 SCP #F# 51 inch Samuel Oschin 51 WMAP 51 bolometers 51 NASA rovers Spirit 51 Very Large Telescope 51 asteroids comets 51 largest moon Charon 51 YU# 51 Cepheid variable 51 NASA STEREO 51 Red Planet 51 planet gravitational tug 51 HiRISE images 51 NGC #A 51 Rosetta orbiter 51 thin crescent 51 Lake Cheko 51 Mars Odyssey spacecraft 51 waning crescent 51 hematite mineral 51 Saturn outermost ring 51 planetary 51 red supergiants 51 Uranus Neptune 51 galactic bulge 51 asteroid Lutetia 51 Eridani 51 Compact Reconnaissance Imaging Spectrometer 51 Alfvén waves 51 Wide Angle Search 51 ESA SMART 51 submillimeter wavelength 51 protons collide 51 Earthshine 51 XMM Newton satellite 51 baryon 51 Kepler observatory 51 spiral galaxies 51 radiotelescope 51 Ringed Planet 51 Higgs boson particle 51 hydroxyl molecules 51 XO 3b 51 Martian crater 51 Comet Encke 51 Infrared Array Camera 51 Lunine 51 asteroids orbiting 51 Cloud Aerosol Lidar 51 MARSIS radar 51 planetary magnetospheres 51 NASA Kepler telescope 51 Aurigid 51 Herschel Space 51 elliptical orbits 51 axial tilt 51 planetary nebulas 51 asteroseismology 51 supernovae explode 51 blazars 51 Eagle Nebula 51 antineutrino 51 gamma ray emission 51 pentaquark 51 observable universe 51 Gravitational lensing 51 neutrino mass 51 tidally locked 51 proplyds 51 moon Deimos 51 Pegasi b 51 GLAST telescope 51 GRB #A 51 infrared spectrograph 51 Jonathan Lunine 51 permanently shadowed regions 51 ESA Herschel 51 X ray Observatory 51 2MASS 51 Saturnian moons 51 NASA WMAP 51 Gondolo 51 called gravitational microlensing 51 meteoroids 51 Jakosky 51 globulars 51 chondrites 51 spaceweather.com 51 orbiting Cassini spacecraft 51 maser emission 51 gravitationally lensed 51 orbiting spacecraft 51 galaxy formation 51 ChemCam 51 tholins 51 Earth asteroids 51 Omega Nebula 51 Saturn aurora 51 orbits 51 oxygen atom 51 spacecraft orbiting 51 twin STEREO spacecraft 51 Neutron stars 51 unmanned probes 51 X ray emitting 51 lensing galaxy 51 Martian rovers 51 moon Mab 51 Terrestrial Planet Finder 51 constellation Perseus 51 supernova explosions 51 antihelium 51 particle detector 51 astronomer 51 biosignatures 51 NASA QuikScat satellite 51 Kuiper Belt 51 Viking Lander 51 spectral characteristics 51 Coma Cluster 51 planets moons 51 Sensing Satellite LCROSS 51 outer planets 51 Filippenko 51 neutrinos 51 circumstellar 51 Sigurd Hofmann 51 constellation Aquila 51 biosignature 51 Lunar Reconnaissance Orbiter LRO 51 baryons 51 ultracold atoms 51 supermassive 51 annular eclipse 51 moons orbiting Saturn 51 gamma ray burst GRB 51 Magellanic Clouds 51 journal Meteoritics 51 GOCE 51 NGC# 51 ESO Very Large Telescope 51 blackbody 51 baryonic matter 51 ammonia hydrate 51 volcanically active 51 Global Surveyor 51 High Accuracy Radial 51 orbital resonance 51 Imaging Spectroradiometer MODIS instrument 51 auroral emissions 51 Adam Riess 51 noctilucent 51 volcanic moon Io 51 Tau Ceti 51 Pleiades cluster 51 WM Keck Observatory 51 Foing 51 RY Sagittarii 51 DISR 51 moons 51 olivine mineral 51 moons Europa 51 perigee 51 gamma ray photons 51 Astrophysical 51 Paranal Chile 51 R#a# 51 Submillimeter Array 51 Very Large Array 51 Science Experiment HiRISE 51 moon Phobos 51 infrared 51 Solar Orbiter 51 Cat Paw Nebula 50 antiproton 50 HESS telescopes 50 radio occultation 50 astronomical phenomena 50 submillimeter galaxies 50 neutrino detectors 50 antihydrogen 50 Geminid shower 50 comet Wild 50 baryonic 50 antineutrinos 50 astrobiologists 50 Butterfly Nebula 50 eccentric orbits