Related by context. All words. (Click for frequent words.) 84 extrasolar planets 78 exoplanet 76 planets orbiting 76 extrasolar planet 76 planets 73 transiting planets 71 brown dwarfs 71 super Earths 71 planets orbiting distant 70 HD #b [002] 70 rocky planets 69 habitable planets 69 exoplanets orbiting 69 planet orbiting 69 planets orbiting stars 68 WASP #b 68 brown dwarf 68 GRBs 67 Earthlike planets 67 supernovae 66 extrasolar 66 quasars 66 hot Jupiters 66 KBOs 66 galaxies 65 Epsilon Eridani 65 HD#b 65 distant galaxies 65 Beta Pictoris b 65 Milky Way galaxy 65 pulsars 65 extrasolar planets orbiting 65 star Gliese 65 globular clusters 65 distant supernovae 64 planets orbiting sun 64 transiting planet 64 planets astronomers 64 terrestrial planets 64 gamma ray burst 64 smallest exoplanet 64 distant galaxy 64 gamma ray bursts 64 gravitational microlensing 64 galaxy clusters 64 CoRoT 7b 64 galaxy cluster 64 millisecond pulsars 64 Gliese #g 64 exo planets 64 planets circling 64 magnetars 63 supernova 63 COROT 63 Gliese 63 X ray binary 63 Milky Way Galaxy 63 Cancri 63 globular cluster 63 starburst galaxies 63 hypervelocity stars 63 astronomers 63 Kepler #b 63 planemos 63 GJ #b [001] 63 Fomalhaut b 62 comets 62 Orion Nebula 62 Sedna 62 SN #gy 62 AGNs 62 exoplanetary 62 radial velocity 62 distant quasars 62 pulsar 62 Kuiper belt objects 62 astronomical objects 62 elliptical galaxies 62 exosolar planets 62 XMM Newton 62 Earthlike planet 62 quasar 62 supernovas 62 Andromeda Galaxy 61 neutron star 61 dwarf galaxies 61 gaseous planet 61 GJ#b 61 Eta Carinae 61 potentially habitable planets 61 CoRoT 9b 61 WIMPs 61 planet HD #b 61 magnetar 61 merging galaxies 61 asteroids 61 Gliese #c 61 habitable worlds 61 Corot 7b 61 planetary nebulae 61 redshift 61 planet orbits 60 radial velocity method 60 TrES 60 galaxy 60 exoplanets planets outside 60 luminous galaxies 60 Antennae Galaxies 60 sunlike stars 60 habitable zone 60 exoplanet orbiting 60 Kuiper Belt object 60 X ray wavelengths 60 Milky Way 60 icy moons 60 Cancri e 60 supernova explosion 60 GRB #B 60 fainter objects 59 Kuiper Belt 59 AB Aurigae 59 microlensing events 59 Earth asteroids 59 millisecond pulsar 59 microlensing 59 moons orbiting 59 red supergiant 59 UDFy # 59 Gliese #d 59 Higgs particle 59 elliptical galaxy 59 NASA Kepler 59 Beta Pictoris 59 Large Magellanic Cloud 59 nebula 59 CoRoT 59 OGLE TR #b 59 neutron stars 59 potentially habitable 59 exoplanets planets 59 Kuiper belt 59 exo planet 59 GRB # 58 Wolszczan 58 Type Ia supernovae 58 SN #A 58 BP Psc 58 constellation Cassiopeia 58 nebulae 58 Hubble observations 58 Earthlike 58 X ray telescopes 58 extrasolar planetary systems 58 Kuiper Belt Objects 58 dwarf galaxy 58 innermost planet 58 supermassive black hole 58 Comet Hale Bopp 58 type Ia supernovae 58 gravitational waves 58 neutrinos 58 habitable planet 58 CoRoT satellite 58 GALEX 58 Quaoar 58 infrared wavelengths 58 NASA Kepler spacecraft 58 Higgs bosons 58 redshifts 58 Galilean satellites 58 solar corona 58 G#.# +#.# 58 Pluto Charon 58 Saturn rings 58 Gliese #e 58 protoplanetary disks 58 supernova remnant 58 spiral galaxies 57 reionization 57 Andromeda galaxy 57 TrES 4 57 Astronomers 57 Enceladus 57 Crab Nebula 57 red supergiants 57 celestial objects 57 AU Mic 57 habitable zones 57 supermassive black holes 57 faint galaxies 57 comet 57 distant galaxy clusters 57 Hot Jupiters 57 supersymmetric particles 57 Upsilon Andromedae 57 HAT P 57 Spitzer Space Telescope 57 GJ #b [002] 57 Kuiper Belt objects 57 Omega Centauri 57 brightest supernova 57 Galilean moons 57 outer planets 57 observable universe 57 gravitationally bound 57 protostar 57 gravitational lensing 57 inhabitable planets 57 Type Ia supernova 57 Fermi telescope 57 intrinsic brightness 57 moon Charon 57 Arches Cluster 57 Red Rectangle 56 OGLE 56 sunlike star 56 CoRoT #b 56 neutrino 56 radial velocity technique 56 Goldilocks planet 56 starburst galaxy 56 planet Uranus 56 Oort cloud 56 axions 56 constellation Virgo 56 earthlike planets 56 HD# [002] 56 antihydrogen atoms 56 constellation Ursa Major 56 Hale Bopp 56 Saturn moons 56 Cepheids 56 Henize #-# 56 Solar System 56 Epsilon Aurigae 56 stellar nurseries 56 X ray observatory 56 phyllosilicates 56 moons 56 transiting exoplanets 56 orbits 56 interacting galaxies 56 PSR J# 56 Fomalhaut 56 astrometry 56 Martian meteorites 56 supernova remnants 56 active galactic nuclei 56 gravitational lenses 56 extragalactic 56 telescopes astronomers 56 Corot 9b 56 spectroscopic observations 56 planetary nebula 56 Kepler spacecraft 56 protostars 56 Kuiper belt object 56 X ray emission 56 ringed planet 56 globulars 56 eclipsing binary 55 quark gluon plasma 55 supergiant star 55 eclipsing binaries 55 extrasolar worlds 55 asteroid 55 protoplanet 55 Earths 55 HARPS 55 Pluto Eris 55 blazar 55 Sasselov 55 Microlensing 55 electron neutrinos 55 X ray binaries 55 planet HD#b 55 baryons 55 lunar crust 55 Cepheid variables 55 noctilucent clouds 55 galaxy M# [002] 55 celestial bodies 55 Upsilon Andromedae b 55 metallicity 55 Gamma ray bursts 55 EPOXI 55 protoplanetary disk 55 supermassive 55 HM Cancri 55 occultations 55 BLG #Lb 55 retrograde orbits 55 geoneutrinos 55 NASA Wilkinson Microwave 55 Galaxy Evolution 55 celestial object 55 supernova explosions 55 galactic mergers 55 moon Enceladus 55 Zeta Ophiuchi 55 muons 55 stellar occultations 55 transiting exoplanet 55 astrophysicists 55 gamma ray observatory 55 ULIRGs 55 Wolf Rayet star 55 Kuiper Belt Object 55 Astrophysicists 55 BLG #L 55 NEAs 55 Extrasolar planets 54 trans Neptunian objects 54 asteroid Vesta 54 distant quasar 54 galaxy NGC 54 constellation Hercules 54 planetary transits 54 X ray observatories 54 J# +# [002] 54 Saturn moon 54 cosmological distances 54 planets circling stars 54 comets orbiting 54 Comet Holmes 54 comet nucleus 54 RS Ophiuchi 54 Saturnian moon 54 cosmic rays 54 distant supernovas 54 interstellar clouds 54 planetary Transits 54 Super Earths 54 SIRTF 54 Oort Cloud 54 Evolution Explorer 54 Konacki 54 Betelgeuse 54 planet TrES 54 solar nebula 54 Optical Gravitational Lensing Experiment 54 UB# [003] 54 optical wavelengths 54 Proxima Centauri 54 WMAP 54 RRATs 54 accretion disk 54 spiral galaxy 54 planetary 54 planets orbits 54 gamma ray flares 54 optical telescopes 54 cosmologists 54 Toutatis 54 Jupiter moon Io 54 proplyds 54 detect gravitational waves 54 moonlets 54 Venusian atmosphere 54 Great Observatories 54 Stephan Quintet 54 ultraviolet wavelengths 54 baryon 53 orbiting observatories 53 infrared radiation 53 smallest extrasolar planet 53 TNOs 53 Exoplanet 53 XTE J# 53 HD #b [001] 53 interstellar dust grains 53 gravitational wave 53 RXTE 53 HARPS spectrograph attached 53 cosmic microwave background 53 interstellar molecules 53 SDSS II 53 type Ia supernova 53 planetoid 53 highly elliptical orbits 53 Pegasi 53 cosmic phenomena 53 supergiant stars 53 constellation Centaurus 53 novae 53 Epsilon Indi 53 Orion nebula 53 mu Arae 53 Comet Lulin 53 masers 53 constellation Aquarius 53 ESA XMM Newton 53 R#a# 53 VB #b 53 Hanny Voorwerp 53 galactic clusters 53 Wolf Rayet stars 53 Higgs boson particle 53 elongated orbits 53 elliptical orbits 53 gamma rays 53 orbiting 53 constellation Cygnus 53 atoms 53 Virgo Cluster 53 Magellanic Clouds 53 gaseous planets 53 SUSY 53 antiparticle 53 Pluto 53 Supernova #A 53 HL Tau 53 planet Gliese #g 53 GQ Lupi 53 NASA Chandra 53 interstellar dust 53 #gy 53 Exoplanets 53 Kepler 9c 53 gravitational radiation 53 SIM PlanetQuest 53 interstellar dust clouds 53 visible wavelengths 53 magnetic reconnection 53 HIP #b 53 GeV 53 spectroscopically 53 blazars 53 subatomic particles 52 exosphere 52 infrared telescopes 52 colliding galaxies 52 Puppis 52 HIRES spectrometer 52 filamentary structure 52 VIRTIS 52 Mimas 52 neutralino 52 Cosmic Microwave Background 52 Gravitational waves 52 star Proxima Centauri 52 plutoids 52 galaxy M# [001] 52 asteroidal 52 hydrated minerals 52 Small Magellanic Cloud 52 Christophe Lovis 52 Kepler 52 neutralinos 52 unmanned probes 52 Milky Way halo 52 Goldilocks zone 52 exoplanetary systems 52 dwarf planets 52 microquasar 52 Jupiter Saturn Uranus 52 photosphere 52 Lagoon Nebula 52 XO 3b 52 asteroid belt 52 axion 52 Hawking radiation 52 gamma ray emission 52 Carina constellation 52 Virgo cluster 52 WMAP satellite 52 binary asteroid 52 constellation Cetus 52 sodium atoms 52 quark 52 aurorae 52 Alpha Centauri 52 SDSS 52 VLTI 52 Uranus 52 planets Kepler 52 spatial dimensions 52 BP Piscium 52 TGFs 52 proto galaxies 52 muon neutrinos 52 circumstellar disks 52 galactic cosmic rays 52 God Particle 52 infrared spectra 52 comet Hale Bopp 52 subatomic particle 52 X ray pulses 52 neutrons 52 Type 1a supernovae 52 fainter 52 KH #D 52 Tarantula Nebula 52 Kepler telescope 52 Higgs boson 52 asteroseismology 52 Earths orbiting 52 orbiting Hubble Space Telescope 52 dirty snowballs 52 constellation Carina 52 meteorites 52 Magnetars 52 lightest exoplanet 52 extrasolar planetary 52 Wilkinson Microwave Anisotropy Probe 52 NASA Fermi Gamma 52 meteoroids 52 heliopause 51 Alfven waves 51 Saturn Cassini 51 asteroids comets 51 spiral nebulae 51 comet McNaught 51 Voyager spacecraft 51 giant gaseous planets 51 Saturn moon Enceladus 51 Comet Hartley 51 Maunder minimum 51 planetesimals 51 2MASS 51 atomic particles 51 submillimeter 51 Comet Hartley 2 51 Mauna Kea Hawaii 51 constellation Sagittarius 51 magnetosphere 51 Nasa Kepler 51 OGLE TR 51 VY Canis Majoris 51 galaxy formation 51 afterglows 51 planetoids 51 NEOs 51 NASA Cassini spacecraft 51 nucleosynthesis 51 moonlet 51 Coma Cluster 51 Anisotropy Probe WMAP 51 Geminga 51 exoplanet discoveries 51 unaided eye 51 NASA Kepler telescope 51 astrophysical 51 carbonaceous chondrites 51 planets moons 51 Hubble Space Telescope HST 51 NASA twin rovers 51 Kepler Telescope 51 ESO VLT 51 P/# A2 51 Lyman alpha 51 moons Phobos 51 ray Space Telescope 51 dust enshrouded 51 X ray Observatory 51 interstellar dust particles 51 silicates 51 S/# P2 51 Eridani 51 Viking landers 51 sunspots 51 IceCube 51 Triangulum Galaxy 51 globular star 51 Kepler Mission 51 Bullet Cluster 51 planetary astronomy 51 impactors 51 sized planets orbiting 51 Nasa spacecraft 51 gravitational wobbles 51 Leonids 51 constellation Lyra 51 spiral galaxy NGC 51 Ulysses spacecraft 51 Cassini Huygens 51 nebular 51 constellation Taurus 51 submillimeter galaxies 51 Trojan asteroids 51 substorms 51 spectroscopic 51 antineutrinos 51 Astrophysical Journal 51 orbiting planets 51 positrons 51 gamma ray photons 51 jovian 51 ionized gas 51 comets asteroids 51 Cat Paw Nebula 51 permanently shadowed craters 51 solar radii 51 interstellar medium 51 Quadrantids 51 Jovian moon 51 Mpc 51 Jovian moons 51 SCP #F# 51 Higgs Boson 51 attosecond 51 brightnesses 51 polarimetry 51 moon Titan 51 supersymmetry 51 nicknamed Xena 51 constellation Pegasus 50 Convection Rotation 50 Gamma ray burst 50 Eagle Nebula 50 antimatter particles 50 magma ocean 50 hydrogen atoms 50 Bose Einstein condensate 50 van Dokkum 50 coronagraph 50 photometry 50 WM Keck Observatory 50 tau neutrinos 50 Delta Cephei 50 ESA Integral 50 HUDF 50 interstellar cloud 50 carbonate minerals 50 muon 50 RHESSI 50 ESO PR 50 extraterrestrial civilizations 50 SOHO spacecraft 50 hypervelocity star 50 Pluto moon Charon 50 eccentric orbits 50 antihydrogen 50 ejecta 50 cosmic cannibal 50 ultraluminous galaxy 50 gamma ray 50 icy comets 50 heliosphere 50 MG J# +# 50 Lutetia 50 neutral mass spectrometer 50 Saturn magnetosphere 50 missing baryons 50 mesosphere 50 Astrophysics Cambridge Mass. 50 planets Uranus 50 accretion disks 50 Mandushev 50 lunar perigee 50 chondrules 50 Cosmic Evolution 50 smallest exoplanets 50 Keck telescope 50 lunar craters 50 lensing galaxy 50 Fornax cluster 50 barred spiral galaxy 50 NICMOS 50 Fermi Gamma ray 50 Astrophysical Journal Letters 50 Helix nebula 50 spiral galaxy Messier 50 astronomical observations 50 spectra 50 constellation Perseus 50 galactic nuclei 50 Saturnian moons 50 cosmic microwave radiation 50 energetic electrons 50 X ray emitting 50 Solar TErrestrial RElations Observatory 50 photons 50 galactic disk 50 Pegasus constellation 50 Cassini spacecraft 50 Geminids 50 blue supergiant 50 solar flares 50 DZero 50 NEOWISE 50 weak gravitational lensing 50 ESO telescopes 50 PSR J# +# 50 AUs 50 Orionids 50 Comet Halley 50 neutrino detectors 50 Comet Machholz 50 RX J# 50 substorm 50 outermost planets 50 Planck satellite 50 Hubble Ultra 50 Planck 50 celestial sphere 50 theoretical particle 50 spatially resolved 50 moons orbiting Saturn 50 Pieter van Dokkum 50 planet WASP #b 50 spherically symmetric 50 TW Hydrae 50 Grillmair 50 high redshift galaxies 50 Cassini 50 moon Europa 50 planet transits 49 perihelion 49 astrophysical phenomena 49 mesons 49 Sara Seager 49 SNe 49 submillimeter wavelengths 49 Filippenko 49 elongated orbit 49 sterile neutrino 49 antiprotons 49 Bug Nebula 49 coronal loops 49 boson 49 WFC3 49 asteroids orbiting 49 baryonic 49 GRB# 49 cluster NGC 49 moons circling 49 Bose Einstein condensates 49 occulted 49 organic molecules 49 Comet Elenin 49 Kailash Sahu 49 shorter wavelengths 49 NASA Far Ultraviolet 49 gravitational interactions 49 JDEM 49 Churyumov Gerasimenko 49 CMB radiation 49 SINFONI 49 Giovanni Cassini 49 NGC# 49 Epoxi 49 LORRI 49 Planetary Transits 49 intracluster 49 Cosmologists 49 electron volts 49 COROT 7b 49 active galactic nucleus 49 Wide Angle Search 49 prebiotic molecules 49 SN #E 49 Cassini ion 49 Hipparcos 49 spacetime 49 Elenin 49 RQ# 49 astrobiologists 49 spacecraft Cassini 49 V# Mon 49 Rosette Nebula 49 supernovae explosions 49 supersymmetric 49 R Coronae Borealis 49 silicate dust 49 UVOT 49 Ring Nebula 49 SN #C 49 particle detectors 49 Alfvén waves 49 SMM J# 49 zodiacal light 49 Adam Riess 49 proton antiproton collisions 49 spectrographs 49 Sagittarius B2 49 Cosmic Microwave Background CMB 49 Gerard Kuiper 49 energetic cosmic rays 49 radial velocities 49 rocky extrasolar planet 49 rocky terrestrial planets 49 CAIs 49 Jupiter Ganymede 49 GRB 49 dinosaur extinction 49 proto planetary disk 49 foreground galaxy 49 constellation Vulpecula 49 neutrino particles 49 gamma ray burst GRB 49 superfluidity 49 Heliospheric Observatory SOHO 49 interferometry 49 Jupiter moons 49 Cosmic rays 49 periodic dimming 49 planet 49 moon Io 49 MARSIS 49 Space Telescope 49 Comet #P/Churyumov-Gerasimenko 49 Lunokhod 49 orbited Jupiter 49 ROSAT 49 Charon Pluto 49 retrograde orbit 49 antihelium 4 49 infrared observatory 49 GROND 49 galactic bulge 49 lobate scarps 49 Mini TES 49 Cygnus X 49 gravitational lens 49 coronal mass ejections 49 giant elliptical galaxy 49 ultracold atoms 49 STEREO spacecraft 49 planets comets 49 redshifted 49 Orionid 49 highly elliptical orbit 48 KamLAND 48 ionized hydrogen 48 Perseus Cluster 48 RS Oph 48 Terrestrial Planet Finder 48 QQ# 48 gravitationally 48 Cassini flyby 48 adaptive optics 48 CRISM 48 protoplanetary discs 48 star Fomalhaut 48 ULP cepheids 48 gamma ray telescopes 48 atomic nuclei 48 spinning neutron stars 48 supernova SN 48 CERN experiments 48 Cygnus Lyra region 48 Bruce Jakosky 48 infrared telescope 48 magnetospheres 48 perigee 48 SN#A 48 Neptune Uranus 48 Gondolo 48 Bok globules 48 NASA STEREO 48 Orion constellation 48 Neutron stars 48 PZ Tel 48 Laser Interferometer Gravitational Wave 48 High Accuracy Radial 48 Type Ia supernovas 48 bolometers 48 globular cluster M# 48 Earth radii 48 largest moon Charon 48 Achernar 48 Anisotropy Probe 48 outermost planet 48 auroras 48 dwarf spheroidal galaxies 48 equatorial regions 48 #P/Holmes 48 Sagittarius dwarf galaxy 48 Mojzsis 48 telescopes 48 Pleiades cluster 48 asterism 48 Type Ia 48 arcminutes 48 IRAS #-# 48 protoplanets 48 Cepheid variable 48 Herschel Space Telescope 48 constellation Scorpius 48 cosmological theories 48 ESO telescope 48 helium atoms 48 circumstellar disk 48 magnetic monopoles 48 AKARI 48 circular orbits 48 outer corona 48 UCDs 48 chemical abundances 48 HII regions 48 Climate Experiment GRACE 48 particle colliders 48 Crab Pulsar 48 magnetotail 48 silicon monoxide 48 supergiants 48 THEMIS 48 chondrites 48 protons collide 48 Earth magnetosphere 48 muon neutrino 48 galactic 48 Kepler Space Telescope 48 PASADENA Calif. Astronomers 48 Uranus Neptune 48 cosmological models 48 Very Large Telescope 48 KT boundary 48 undiscovered particle 48 stellar occultation 48 circumstellar 48 Noctilucent clouds 48 SN #D 48 Alycia Weinberger 48 matter antimatter asymmetry 48 Jupiter Saturn 48 Kepler observatory 48 NASA Cassini 48 Halley comet 48 Keck Interferometer 48 Trapezium 48 Iapetus 48 VLBA 48 HD# [005] 48 astrophysical objects 48 XMM Newton satellite 48 infall 48 supergiant 48 baryonic matter 48 solar neutrinos 48 comet Wild 48 spectroscopy 48 polaritons 48 optical interferometry 48 orbiting Chandra 48 Perseids 48 lunar meteorites 48 Enceladus flybys 48 MicroFUN 48 Hubble Telescope 48 astrobiology 48 comet Lulin 48 galactic cores 48 cosmic ray particles 48 high temperature superconductivity 48 Saturn outermost ring 48 Samuel Oschin Telescope 48 THEMIS satellites 48 JWST 48 cosmic ray 48 asteroid Ceres 48 Descent Imager Spectral Radiometer 48 relativistic particles 48 Keck telescopes 48 Io Europa 48 extrasolar planet HD #b 48 Supernovae 47 optical spectra 47 #P/Churyumov-Gerasimenko 47 constellation Libra 47 luminosity 47 Comet McNaught 47 sextillion stars 47 luminosities 47 occultation 47 Saturnian 47 Saturnian system 47 pentaquark 47 Lunine 47 neutrino oscillation 47 Itokawa 47 Global Surveyor 47 Canes Venatici 47 W boson 47 proto planetary disks 47 galaxy redshift 47 neutron spectrometer 47 astronomical phenomena 47 exoplanet hunter 47 antiproton 47 Viking Lander 47 Saturn Enceladus 47 Venus transits 47 Supernova Cosmology Project 47 SNe Ia 47 Cassini Huygens spacecraft 47 Huygens mission 47 general relativity 47 lunar poles 47 NASA Great Observatories 47 SuperWASP 47 Extrasolar Planets 47 HiRISE image 47 Raman spectroscopy 47 Titan Saturn 47 stellar seismology 47 GZK cutoff 47 nucleon