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(Click for frequent words.) 76 exoplanets 76 planets 75 planet orbiting 75 extrasolar planets 74 exoplanets orbiting 74 rocky planets 71 habitable planets 70 transiting planets 70 exoplanet 70 Earthlike planets 70 super Earths 70 planets orbiting distant 69 planet orbits 69 terrestrial planets 69 extrasolar planet 68 brown dwarfs 68 planets orbiting sun 68 planets circling 68 planets orbiting stars 68 HD #b [002] 67 brown dwarf 67 star Gliese 67 globular clusters 67 planet HD #b 67 Beta Pictoris b 66 Red Rectangle 66 KBOs 66 exoplanet orbiting 66 Epsilon Eridani 66 Andromeda galaxy 66 transiting planet 66 WASP #b 65 Fomalhaut b 65 Milky Way galaxy 65 extrasolar 65 Orion Nebula 65 extrasolar planets orbiting 65 Beta Pictoris 64 Milky Way Galaxy 64 AU Mic 64 X ray binary 64 Proxima Centauri 64 SN #gy 64 Eta Carinae 64 GRBs 64 Kuiper belt objects 64 radial velocity 64 distant galaxy 64 gaseous planet 64 globular cluster 64 sunlike stars 63 potentially habitable planets 63 astronomical objects 63 merging galaxies 63 supernovae 63 exoplanetary 63 Fomalhaut 63 Upsilon Andromedae 63 earthlike planets 63 microlensing events 63 dwarf galaxies 63 distant supernovae 63 Andromeda Galaxy 63 HD#b 63 red supergiant 63 habitable zones 63 moons orbiting 63 quasars 62 X ray wavelengths 62 planemos 62 Earthlike 62 astronomers 62 fainter objects 62 elliptical galaxies 62 Earthlike planet 62 magnetars 62 Spitzer Space Telescope 62 quasar 62 eclipsing binary 62 galaxies 62 distant galaxies 62 planetary nebulae 61 Large Magellanic Cloud 61 galaxy cluster 61 Kepler #b 61 planets astronomers 61 icy moons 61 supernova explosion 61 Gliese 61 hot Jupiters 61 neutron star 61 red supergiants 61 magnetar 61 galaxy M# [002] 61 BP Psc 61 spiral galaxies 61 Omega Centauri 61 Gliese #c 61 galaxy 61 Cancri 61 exo planets 61 constellation Cassiopeia 61 gravitational microlensing 61 orbits 61 SN #A 60 gravitationally bound 60 Gliese #d 60 extrasolar planetary systems 60 microlensing 60 starburst galaxies 60 CoRoT satellite 60 distant quasar 60 AB Aurigae 60 Corot 7b 60 elliptical galaxy 60 Earth asteroids 60 Astronomers 60 habitable zone 60 constellation Hercules 60 CoRoT 7b 60 Zeta Ophiuchi 60 transiting exoplanets 60 ultraviolet wavelengths 60 sized planets orbiting 60 Small Magellanic Cloud 60 GJ #b [001] 60 Epsilon Aurigae 60 hypervelocity stars 60 Antennae Galaxies 60 X ray telescopes 60 millisecond pulsars 60 AGNs 59 supernovas 59 XMM Newton 59 Alpha Centauri 59 Galilean moons 59 dwarf galaxy 59 asteroids 59 redshifts 59 celestial objects 59 interacting galaxies 59 gaseous planets 59 protoplanetary disks 59 Tarantula Nebula 59 active galactic nuclei 59 infrared wavelengths 59 globulars 59 occultations 59 pulsars 59 Carina constellation 59 constellation Pegasus 59 Konacki 59 unaided eye 59 Hubble observations 59 intrinsic brightness 59 globular star 59 gamma ray burst 59 habitable worlds 59 Cancri e 59 inhabitable planets 59 Wolszczan 59 Milky Way 59 CoRoT #b 59 TrES 59 spiral galaxy 58 luminous galaxies 58 Orion nebula 58 comets 58 supergiant star 58 protoplanet 58 Kuiper Belt objects 58 COROT 58 HD# [002] 58 supermassive black hole 58 Kuiper Belt Objects 58 planets orbits 58 planetary transits 58 nebulae 58 constellation Cetus 58 exosolar planets 58 celestial object 58 exo planet 58 GALEX 58 Pluto Charon 58 neutron stars 58 Eagle Nebula 58 distant quasars 58 VB #b 58 comets orbiting 58 constellation Centaurus 58 moon Charon 58 planetary nebula 58 GJ #b [002] 58 supernova 58 Fermi telescope 58 galaxy clusters 58 HL Tau 58 celestial bodies 58 constellation Ursa Major 58 Kuiper Belt object 58 orbiting planets 58 Comet Holmes 58 galaxy NGC 58 sunlike star 57 constellation Carina 57 X ray emission 57 Gliese #g 57 Galilean satellites 57 circumstellar disks 57 Solar System 57 OGLE TR #b 57 KH #D 57 Saturn moons 57 CoRoT 57 Type Ia supernova 57 galaxy M# [001] 57 distant galaxy clusters 57 protoplanetary disk 57 smallest exoplanet 57 HD# [005] 57 type Ia supernovae 57 brightnesses 57 telescopes astronomers 57 star Proxima Centauri 57 Oort cloud 57 X ray observatories 57 comet 57 protostars 57 supernova remnant 57 NASA Kepler 57 Type Ia supernovae 57 X ray observatory 57 microquasar 57 Kepler 9c 57 stellar nurseries 57 Sedna 57 Martian meteorites 57 potentially habitable 57 protostar 57 coronagraph 57 nebula 56 constellation Sagittarius 56 Higgs bosons 56 planets circling stars 56 OGLE TR 56 habitable planet 56 Extrasolar planets 56 galactic mergers 56 innermost planet 56 gravitational lenses 56 Upsilon Andromedae b 56 constellation Cygnus 56 HAT P 56 spectroscopic observations 56 PZ Tel 56 pulsar 56 exoplanets planets 56 cosmological distances 56 asteroids orbiting 56 GRB #B 56 cluster NGC 56 BP Piscium 56 millisecond pulsar 56 starburst galaxy 56 asteroid Vesta 56 gravitational interactions 56 blazar 56 Hale Bopp 56 faint galaxies 56 supermassive black holes 56 GRB # 56 Kuiper Belt 56 Trojan asteroids 56 brightest supernova 56 gamma ray bursts 56 constellation Taurus 56 nebular 56 BLG #L 56 TNOs 56 R Coronae Borealis 56 NASA Fermi Gamma 56 Magellanic Clouds 56 Gliese #e 56 circumstellar disk 56 spectroscopically 56 lunar crust 56 HD #b [001] 56 colliding galaxies 56 comet nucleus 56 extragalactic 56 Cepheid variables 56 Rosette Nebula 56 Crab Nebula 56 asteroid 56 Henize #-# 56 X ray binaries 56 CoRoT 9b 56 orbiting 56 proplyds 55 Hot Jupiters 55 axions 55 elongated orbits 55 masers 55 Jupiter moon Io 55 giant elliptical galaxy 55 Earths 55 constellation Virgo 55 fainter 55 retrograde orbits 55 Puppis 55 constellation Aquarius 55 Wolf Rayet star 55 Keck telescope 55 outer planets 55 ESA XMM Newton 55 TrES 4 55 astrometry 55 Solar TErrestrial RElations Observatory 55 Ring Nebula 55 Oort Cloud 55 Evolution Explorer 55 radial velocity technique 55 GJ#b 55 planet Gliese #g 55 eclipsing binaries 55 XTE J# 55 optical telescopes 55 Milky Way halo 55 planetary 55 aurorae 55 WIMPs 55 metallicity 55 planet WASP #b 55 radial velocity method 55 eccentric orbits 55 Type 1a supernovae 55 Bug Nebula 55 trans Neptunian objects 55 solar corona 55 Wolf Rayet stars 55 observable universe 55 moon Io 55 lensing galaxy 55 proto planetary disks 55 gravitational lensing 55 Microlensing 55 redshift 55 spatial dimensions 55 photosphere 55 electron neutrinos 55 Venusian atmosphere 55 luminosities 55 G#.# +#.# 55 R#a# 55 constellation Lyra 55 moons 55 RS Ophiuchi 55 constellation Scorpius 55 IRAS #-# 55 J# +# [002] 55 galactic nuclei 55 planet TrES 55 HM Cancri 55 Voorwerp 55 Comet Lulin 55 Cygnus Lyra region 55 interstellar clouds 55 circular orbits 54 infrared spectra 54 arcseconds 54 asteroidal 54 orbiting Chandra 54 supermassive 54 SN#A 54 ray Space Telescope 54 phyllosilicates 54 VY Canis Majoris 54 icy comets 54 cosmic cannibal 54 Galaxy Evolution 54 planet Uranus 54 Cepheids 54 moons Phobos 54 Astrophysicists 54 OGLE 54 interstellar cloud 54 BLG #Lb 54 HIRES spectrometer 54 Lagoon Nebula 54 moon Europa 54 MG J# +# 54 submillimeter wavelengths 54 X ray Observatory 54 Jovian moons 54 spiral galaxy NGC 54 GQ Lupi 54 Keck telescopes 54 interstellar dust particles 54 RXTE 54 Virgo cluster 54 astrophysicists 54 Hanny Voorwerp 54 Goldilocks zone 54 Kuiper Belt Object 54 novae 54 NICMOS 54 XO 3b 54 type Ia supernova 54 Kepler telescope 54 Corot 9b 54 Enceladus 54 Gravitational waves 54 astrophysical 54 meteoritic material 54 blazars 54 elliptical orbits 54 Kepler spacecraft 54 detect gravitational waves 54 accretion disk 54 Kuiper belt object 54 Kuiper belt 54 planets moons 54 chondrites 54 SOHO spacecraft 54 Saturn rings 54 X ray emitting 54 NASA Chandra 54 telescopes 54 infrared telescopes 53 noctilucent clouds 53 circumstellar 53 VLTI 53 Betelgeuse 53 hydrated minerals 53 Virgo Cluster 53 Earths orbiting 53 supergiant stars 53 Triangulum 53 Comet Elenin 53 Cat Paw Nebula 53 TW Hydrae 53 Quaoar 53 AUs 53 galaxy formation 53 UDFy # 53 supernova explosions 53 Pegasi 53 VIRTIS 53 Arches Cluster 53 star Fomalhaut 53 Orion constellation 53 WM Keck Observatory 53 moonlets 53 Trapezium 53 stellar occultations 53 La Silla Chile 53 gamma ray flares 53 Eridani 53 NEAs 53 dwarf planets 53 supernova remnants 53 Nasa spacecraft 53 Stephan Quintet 53 exosphere 53 Mamajek 53 Super Earths 53 gamma ray emission 53 galactic disk 53 galactic clusters 53 mu Arae 53 constellation Puppis 53 periodic dimming 53 SNe 53 ringed planet 53 Sagittarius B2 53 highly elliptical orbits 53 ESO VLT 53 Gamma ray bursts 53 filamentary structure 53 Supernova #A 53 Goldilocks planet 53 ULIRGs 53 planetoid 53 Higgs particle 53 exoplanets planets outside 53 IRC +# 53 Pegasus constellation 53 gamma ray observatory 53 Cepheid variable 53 photometry 53 spatially resolved 53 astrophysical objects 53 stellar occultation 53 STEREO spacecraft 53 Exoplanets 53 Doradus 53 SIRTF 52 Triangulum Galaxy 52 outer corona 52 2MASS 52 Uranus Neptune 52 Pleiades cluster 52 Martian equator 52 Bullet Cluster 52 elliptical galaxy NGC 52 Bok globules 52 Sasselov 52 NASA twin rovers 52 V# Mon 52 planet transits 52 galaxy Andromeda 52 Carina Nebula 52 celestial sphere 52 Comet Hartley 52 #P/Churyumov-Gerasimenko 52 Viking landers 52 Magnetars 52 NASA Kepler spacecraft 52 visible wavelengths 52 binary asteroid 52 solar nebula 52 comet Hale Bopp 52 intracluster 52 proto galaxies 52 moon Enceladus 52 ultraluminous galaxy 52 protoplanetary discs 52 supersymmetric particles 52 outermost planet 52 Very Large Telescope 52 reionization 52 Comet Machholz 52 active galactic nucleus 52 asteroids comets 52 ESO telescopes 52 occulted 52 lunar craters 52 baryon 52 SDSS II 52 P/# A2 52 Elliptical galaxies 52 Neutron stars 52 Lutetia 52 globular cluster M# 52 interstellar dust clouds 52 barred spiral galaxy 52 planetary embryos 52 Coma Cluster 52 Scorpii 52 Mauna Kea Hawaii 52 planetary nebulas 52 Cassini spacecraft 52 spiral nebulae 52 plutoids 52 millimeter wavelengths 52 planet HD#b 52 HARPS 52 SINFONI 52 Saturn moon 52 Delta Cephei 52 PSR J# 52 Saturnian moons 52 Kepler Telescope 52 spherically symmetric 52 extrasolar planetary 52 galaxies collide 52 orbital resonance 52 Anisotropy Probe WMAP 52 Toutatis 52 Lyman alpha 52 arcminutes 52 Pluto Eris 52 Olympus Mons 51 astrophysical phenomena 51 protoplanets 51 constellation Vulpecula 51 Helix Nebula 51 Explorer WISE 51 Perseus Cluster 51 Mimas 51 Type Ia 51 galactic bulge 51 spectra 51 Wilkinson Microwave Probe 51 infrared interferometry 51 silicates 51 spiral galaxy M# 51 spiral galaxy Messier 51 Mars 51 interstellar dust 51 sunspot 51 ionized gas 51 constellation Aries 51 infrared imager 51 exoplanetary systems 51 Muchachos Observatory 51 perihelion 51 pointings 51 Fornax cluster 51 muons 51 asteroid belt 51 infrared wavelength 51 Keck Interferometer 51 asteroseismology 51 Tauri Sb 51 sunspots 51 reflection nebula 51 planetoids 51 zodiac constellations 51 asterism 51 EPOXI 51 Mpc 51 Comet Hale Bopp 51 COROT 7b 51 Martian surface 51 meteorites 51 WMAP satellite 51 Sombrero Galaxy 51 HiRISE image 51 blue supergiant 51 supernova SN 51 Astronomical Units 51 RRATs 51 Pleiades star 51 solar radii 51 coronal loops 51 organic molecules 51 gravitationally lensed 51 optical wavelengths 51 spectrometers 51 supernovae explode 51 Higgs boson particle 51 Viking Lander 51 biosignatures 51 Orionids 51 Saturn Cassini 51 Kepler 9b 51 submillimeter 51 comets asteroids 51 neutrinos 51 Heliospheric Observatory SOHO 51 optical spectra 51 giant gaseous planets 51 gravitational wobbles 51 infall 51 interstellar dust grains 51 telescopic observations 51 HIP #b 51 moon Ganymede 51 carbonaceous chondrites 51 Pieter van Dokkum 51 Lyra constellations 51 Neptune Uranus 51 galactic halo 51 Saturnian moon 51 galaxy NGC# 51 Comet Hartley 2 51 WMAP 51 spherical halo 51 planets comets 51 polarimetry 51 jovian 51 planet Gliese #c 51 quark gluon plasma 51 permanently shadowed craters 51 Coma cluster 51 comet Lulin 50 RY Sagittarii 50 auroral 50 Jupiter moons 50 extrasolar planet HD #b 50 transiting exoplanet 50 Cassini flyby 50 constellations Cygnus 50 stellar seismology 50 Butterfly Nebula 50 chromosphere 50 planetary Transits 50 NASA Wilkinson Microwave 50 ionized hydrogen 50 planets Uranus 50 planetesimals 50 binary quasar 50 gravitational interaction 50 GRB# 50 Voyager spacecraft 50 accretion disks 50 constellation Libra 50 supernovae explosions 50 Infrared Array Camera 50 THEMIS satellites 50 Ulysses spacecraft 50 abundances 50 RX J# 50 foreground galaxy 50 gravitational waves 50 S/# P2 50 moons circling 50 interstellar molecules 50 Red Planet 50 gravitational perturbations 50 Herbig Ae Be 50 Geminga 50 impactors 50 Charon Pluto 50 ESO PR 50 unmanned probes 50 Herschel Space 50 dirty snowballs 50 afterglows 50 Astrophysics Cambridge Mass. 50 constellation Orion 50 ejecta 50 chemical abundances 50 Helix nebula 50 Mandushev 50 spectrographs 50 HII regions 50 orbiting Hubble Space Telescope 50 RHESSI 50 VLBA 50 planets asteroids 50 Hubble Ultra 50 Seyfert galaxies 50 Samuel Oschin Telescope 50 Global Surveyor 50 velocity Planet Searcher 50 NASA Cassini spacecraft 50 Hipparcos 50 #gy 50 CRISM 50 submillimetre 50 RQ# 50 constellation Andromeda 50 galactic cosmic rays 50 Jupiter Saturn 50 CMEs 50 Beehive Cluster 50 Kepler 50 SN #D 50 submillimetre wavelengths 50 retrograde orbit 50 Exoplanet 50 STEREO 50 NASA rovers 50 moons orbiting Saturn 50 nicknamed Xena 50 inner asteroid belt 50 Uranus 50 solar flares 50 Cassini ion 50 SIM PlanetQuest 50 Bruce Jakosky 50 outermost planets 50 cosmic microwave background 50 Terrestrial Planet Finder 50 neutrino 50 supergiants 50 Hubble Space Telescope HST 49 UB# [003] 49 TGFs 49 subsurface ocean 49 antiparticle 49 Space Telescope 49 WFPC2 49 moons Europa 49 muon neutrinos 49 Type Ia supernovas 49 Mössbauer 49 ESO Very Large Telescope 49 neutral mass spectrometer 49 interstellar medium 49 Mars Odyssey spacecraft 49 extrasolar worlds 49 gravitational lens 49 X ray pulses 49 constellation Auriga 49 adaptive optics 49 Cygnus X 49 proto planetary disk 49 Mini TES 49 Trifid Nebula 49 Jovian moon 49 Maunder minimum 49 UVOT 49 Nasa Kepler 49 Saturn aurora 49 sodium atoms 49 asteroid Ceres 49 highly elliptical orbit 49 baryons 49 gravitationally 49 ROSAT 49 star Spica 49 NGC# 49 dynamical evolution 49 Orionid 49 constellation Leo 49 supersymmetry 49 HARPS spectrograph attached 49 lunar poles 49 Submillimeter Array 49 moon Titan 49 PASADENA Calif. Astronomers 49 arcsec 49 tau neutrinos 49 OMEGA instrument 49 SMBH 49 Christophe Lovis 49 SN #C 49 comet McNaught 49 Great Observatories 49 GeV 49 constellation Aquila 49 dust enshrouded 49 cosmic phenomena 49 southern constellation Carina 49 ULP cepheids 49 nucleosynthesis 49 constellation Cepheus 49 zodiacal light 49 spectroscopic 49 Martian crater 49 Gaensler 49 comet Wild 49 Infrared Thermal Imaging Spectrometer 49 Supernovae 49 Saturn moon Enceladus 49 hydrothermal vents 49 chondrules 49 infrared spectrometer 49 SNR #-#.# 49 magnetic reconnection 49 Tarantula nebula 49 electron volts 49 Syrtis Major 49 telescope 49 earthshine 49 Galileo spacecraft 49 substorm 49 neutralino 49 Mars Global Surveyor 49 supersymmetric 49 Cassini 49 Sagittarius dwarf galaxy 49 quark 49 Spitzer infrared 49 Churyumov Gerasimenko 49 spacecraft Cassini 49 ALH# 49 Meridiani Planum 49 planet 49 constellation Eridanus 49 antihydrogen atoms 49 Earth magnetosphere 49 Mojzsis 49 coronal loop 49 antineutrinos 49 SN #E 49 HiRISE camera aboard 49 magnetospheres 49 diffuse aurora 49 Charles Beichman 49 STEREO mission 49 planetary orbits 49 orbiting observatories 49 equatorial regions 49 z ~ 49 constellation Gemini 49 gravitational tug 49 tidal bulge 49 Spitzer infrared spectrograph 49 volcanic moon Io 49 elongated orbit 49 geoneutrinos 49 bolometers 49 carbonaceous chondrite 49 Orbiter LRO 49 protons collide 49 lunar orbits 49 LORRI 49 star Beta Pictoris 49 heliopause 49 positrons 48 meteoroids 48 smallest extrasolar planet 48 occultation 48 Higgs Boson 48 Epsilon Indi 48 Epoxi 48 silicate crystals 48 particle detectors 48 gamma rays 48 Mars Reconnaissance Orbiter 48 Tempel 1 48 antimatter particles 48 lobate scarps 48 SCP #F# 48 APXS 48 arcsecond 48 spacecraft orbiting 48 J#.# [001] 48 SMM J# 48 Planetary Transits 48 Wilkinson Microwave Anisotropy Probe 48 extraterrestrial civilizations 48 astrobiologists 48 shorter wavelengths 48 Diviner 48 DIXI 48 spacecraft flyby 48 baryonic 48 exoplanet discoveries 48 Keck Telescope 48 baryonic matter 48 Comet McNaught 48 constellation Hydra 48 Jupiter Ganymede 48 Cosmologists 48 Optical Gravitational Lensing Experiment 48 heliosphere 48 magnetosphere 48 COROT exo 3b 48 galactic 48 Deep Field HUDF 48 nebulas 48 galactic cores 48 diffraction patterns 48 SNe Ia 48 SUSY 48 High Accuracy Radial 48 Shoemaker Levy 48 protoplanetary disc 48 SMBHs 48 Phobos 48 spectral signatures 48 HUDF 48 faintest galaxies 48 tidally locked 48 moons Io 48 suns 48 Comet Halley 48 Tau Ceti 48 emission nebula 48 hematite mineral 48 QQ# 48 orbiting spacecraft 48 orbiting gamma ray 48 gamma ray emitting 48 olivine 48 Halley comet 48 Saturnian moon Titan 48 gamma ray burst GRB 48 zodiacal constellations 48 assumed planets circling 48 NGC #A 48 alien civilizations 48 corona 48 GRB #A 48 Iapetus 48 Mushotzky 48 tholins 48 spherules 48 sun corona 48 protoplanetary 48 astronomical phenomena 48 Kepler Mission 48 Martian moons 48 HARPS instrument 48 Sara Seager 48 Globular Cluster 48 Surveys ACS 48 airglow 48 ESO telescope 48 Dwarf galaxies 48 PSR B# 48 Chandra X ray 48 Martian rovers 48 Jonathan Lunine 48 Galaxies 48 cometary material 48 blue straggler 48 ultraviolet radiation emitted 48 Earth asteroids NEAs 48 cometary impacts 48 Itokawa 48 ultracold atoms 48 dusty disks 48 X ray afterglow 48 redshift z = 48 Spectrograph 48 Pluto moon Charon 48 cosmic collisions 48 Quadrantids 48 gamma ray telescopes 48 Jupiter icy moons 48 Gondolo 48 Saturn magnetosphere 48 Gravitational lensing