Related by context. All words. (Click for frequent words.) 70 exoplanets orbiting 69 planets orbiting distant 69 Earthlike planets 68 planets orbiting 66 brown dwarfs 65 transiting planets 64 planets orbiting sun 64 Epsilon Eridani 64 planet orbiting 64 rocky planets 64 Beta Pictoris b 64 exoplanets 63 starburst galaxies 63 HD #b [002] 63 brown dwarf 63 extrasolar planets orbiting 62 transiting exoplanets 62 extrasolar planets 62 extrasolar 62 Gliese 62 type Ia supernovae 62 Pegasus constellation 62 red supergiants 61 habitable planets 61 brightnesses 61 supernovae 61 earthlike planets 61 AB Aurigae 61 HD# [002] 61 planet HD #b 61 gravitational microlensing 61 WASP #b 61 SN #gy 61 extrasolar planet 61 Antennae Galaxies 60 supernovas 60 planet orbits 60 star Gliese 60 Cancri e 60 cosmological distances 60 super Earths 60 distant galaxy 60 exoplanet 60 extragalactic 60 AU Mic 60 protostar 60 globular clusters 60 sunlike stars 60 exoplanetary 60 elliptical galaxies 60 distant quasar 60 novae 60 transiting planet 60 AGNs 59 moons orbiting 59 eclipsing binary 59 distant quasars 59 exosolar planets 59 Fermi telescope 59 planetary nebulae 59 GRBs 59 Eta Carinae 59 dwarf galaxies 59 planets orbiting stars 59 Cancri 59 HL Tau 59 exo planets 59 exoplanet orbiting 59 radial velocity 59 distant supernovae 59 BP Psc 59 exo planet 59 COROT 59 sized planets orbiting 59 Wolszczan 59 Orion nebula 59 Red Rectangle 59 microlensing events 59 Kuiper Belt objects 59 eclipsing binaries 59 Orion Nebula 59 XMM Newton 59 SN #A 59 Gliese #c 59 Kuiper Belt Objects 59 KBOs 58 habitable zones 58 Beta Pictoris 58 Kepler #b 58 CoRoT 58 Type Ia supernovae 58 Cepheid variables 58 luminous galaxies 58 planet TrES 58 HD#b 58 fainter objects 58 gravitationally bound 58 magnetars 58 gamma ray burst 58 CoRoT 9b 58 X ray wavelengths 58 Epsilon Aurigae 58 icy moons 58 occultations 58 planets 58 planemos 58 spectroscopic observations 58 electron neutrinos 58 OGLE TR #b 57 GQ Lupi 57 BP Piscium 57 Earthlike planet 57 HAT P 57 CoRoT satellite 57 Hubble observations 57 red supergiant 57 terrestrial planets 57 extrasolar planetary systems 57 Corot 7b 57 Gliese #g 57 Zeta Ophiuchi 57 stellar nurseries 57 astrophysical phenomena 57 TrES 57 Hot Jupiters 57 Type 1a supernovae 57 millisecond pulsars 57 distant galaxy clusters 57 nebular 57 galaxies 57 quasars 57 elliptical galaxy 57 intrinsic brightness 57 galaxy M# [002] 57 Gliese #d 57 merging galaxies 57 type Ia supernova 57 millisecond pulsar 57 Tarantula Nebula 57 CoRoT 7b 56 spectroscopically 56 protoplanetary disks 56 redshifts 56 Upsilon Andromedae b 56 Proxima Centauri 56 Elliptical galaxies 56 gamma ray emission 56 quasar 56 Konacki 56 Fomalhaut b 56 Gamma ray bursts 56 KH #D 56 Kuiper belt objects 56 Upsilon Andromedae 56 GJ #b [001] 56 R Coronae Borealis 56 Higgs bosons 56 stellar seismology 56 active galactic nuclei 56 circumstellar disks 56 masers 56 Gliese #e 56 RRATs 56 moon Charon 56 protostars 56 hot Jupiters 56 smallest exoplanet 56 Henize #-# 56 nebulae 56 protoplanetary disk 56 nucleosynthesis 56 Omega Centauri 56 retrograde orbits 56 Galilean satellites 56 celestial objects 55 exoplanets planets 55 distant galaxies 55 planet Gliese #g 55 magnetar 55 ultraviolet wavelengths 55 constellation Cassiopeia 55 galaxy cluster 55 potentially habitable planets 55 spiral galaxies 55 protoplanetary discs 55 supernova 55 gamma ray bursts 55 Type Ia supernova 55 asteroids comets 55 gaseous planet 55 Kepler 9c 55 supernova remnants 55 Delta Cephei 55 SIRTF 55 X ray binary 55 astronomers 55 GJ#b 55 blazars 55 Andromeda galaxy 55 X ray emission 55 blazar 55 Milky Way galaxy 55 pulsars 55 microlensing 55 TrES 4 55 planets moons 55 plutoids 55 Eagle Nebula 55 Saturn moons 55 planet transits 55 Ring Nebula 55 HIRES spectrometer 55 sunlike star 55 Earths orbiting 55 X ray binaries 55 P/# A2 55 Lyman alpha 55 Virgo Cluster 55 interstellar dust clouds 55 faint galaxies 55 globular cluster 55 ESA XMM Newton 55 dust enshrouded 55 GALEX 55 hypervelocity stars 55 Andromeda Galaxy 54 planets atmospheres 54 afterglows 54 Extrasolar planets 54 trans Neptunian objects 54 Cepheid variable 54 Milky Way Galaxy 54 Kailash Sahu 54 Betelgeuse 54 inhabitable planets 54 Magnetars 54 Magellanic Clouds 54 Earthlike 54 intracluster 54 moonlets 54 X ray telescopes 54 constellation Pegasus 54 Galaxy Evolution 54 microquasar 54 interacting galaxies 54 SN#A 54 periodic dimming 54 Cepheids 54 Corot 9b 54 photometry 54 ESO PR 54 Supernova #A 54 astronomical objects 54 Alpha Centauri 54 elongated orbits 54 Type Ia supernovas 54 GRB #B 54 X ray observatories 54 UDFy # 54 neutron star 54 Pleiades cluster 54 habitable worlds 54 protoplanet 54 constellation Centaurus 54 NASA Kepler 54 dwarf galaxy 54 globulars 54 COROT 7b 54 Astronomers 54 orbits 54 supernova explosion 54 Saturn aurora 54 antineutrinos 54 supermassive 54 Fomalhaut 54 J# +# [002] 54 interstellar clouds 54 GRB # 53 optical wavelengths 53 tau neutrinos 53 dusty disks 53 PSR J# 53 Perseus Cluster 53 orbiting planets 53 Triangulum Galaxy 53 GJ #b [002] 53 planets Kepler 53 galaxy clusters 53 gaseous planets 53 Kuiper Belt object 53 Spitzer Space Telescope 53 VIRTIS 53 Hale Bopp 53 planetary nebula 53 supernova remnant 53 HARPS 53 Large Magellanic Cloud 53 Gondolo 53 exoplanet atmospheres 53 Type Ia 53 Jupiter moons 53 Sagittarius B2 53 ray Space Telescope 53 galactic clusters 53 aurorae 53 RS Ophiuchi 53 moons Phobos 53 celestial object 53 X ray Observatory 53 planetary Transits 53 metallicity 53 Jovian moon 53 Pluto Charon 53 moons 53 cluster NGC 53 Comet Machholz 53 lensing galaxy 53 gamma ray observatory 53 constellation Virgo 53 OGLE TR 53 astrophysicists 53 Voorwerp 53 supersymmetric particles 53 axions 53 Pegasi 53 asteroseismology 53 Scorpii 53 Earth asteroids 53 circumstellar disk 53 Dumbbell Nebula 53 coronagraph 53 airglow 53 TGFs 53 luminosities 53 ULIRGs 53 hydrated minerals 53 unaided eye 53 Neutron stars 53 planets orbits 53 ESO VLT 53 HD# [005] 53 astrophysical objects 53 constellation Hercules 53 asteroid Vesta 53 Saturn rings 53 Comet Holmes 52 Martian rovers 52 brightest supernova 52 neutralinos 52 ringed planet 52 chemical abundances 52 protons collide 52 rotating neutron stars 52 Comet Hartley 52 supergiant stars 52 planetary embryos 52 transiting exoplanet 52 Milky Way halo 52 X ray observatory 52 Comet Hale Bopp 52 Wolf Rayet stars 52 NASA Far Ultraviolet 52 SNe 52 ROSAT 52 noctilucent clouds 52 coronal loops 52 SDSS II 52 IRC +# 52 galactic mergers 52 planet Uranus 52 RHESSI 52 muon 52 baryon 52 Sedna 52 Virgo cluster 52 occulted 52 orbiting 52 accretion disk 52 Mauna Kea Hawaii 52 comet Lulin 52 galactic disk 52 Pieter van Dokkum 52 outer planets 52 Carina constellation 52 Higgs particle 52 radial velocity technique 52 extrasolar worlds 52 comets orbiting 52 accretion disks 52 Rosette Nebula 52 ULP cepheids 52 Keck Interferometer 52 HM Cancri 52 Seyfert galaxies 52 Geminids 52 Nasa Kepler 52 Viking landers 52 constellation Carina 52 Saturn outermost ring 52 giant elliptical galaxy 52 pulsar 52 WIMPs 52 optical telescopes 52 galaxy 52 Maunder minimum 52 Small Magellanic Cloud 52 spatially resolved 52 Cassini spacecraft 52 diffuse aurora 52 galaxies collide 52 spectroscopic measurements 52 positrons 52 planets asteroids 52 TW Hydrae 52 Jupiter moon Io 52 outer corona 52 neutron stars 52 Doradus 52 Grillmair 52 Hanny Voorwerp 52 carbonaceous chondrites 52 NEAs 52 comets 52 radial velocity method 52 galactic cosmic rays 52 gamma rays emitted 52 planets circling stars 52 Crab Nebula 52 Galilean moons 52 Comet Lulin 52 GRB #A 51 galaxy formation 51 distant supernovas 51 Bug Nebula 51 CoRoT #b 51 planets comets 51 Kuiper belt 51 La Silla Chile 51 infrared telescopes 51 highly elliptical orbits 51 interstellar cloud 51 planetary nebulas 51 Infrared Array Camera 51 planetary transits 51 comet 51 gravitational wave 51 astrometry 51 binary asteroid 51 colliding galaxies 51 habitable planet 51 earthshine 51 geoneutrinos 51 Gaensler 51 silicate crystals 51 Evolution Explorer 51 globular cluster M# 51 Orionids 51 PZ Tel 51 Saturn moon 51 Bok globules 51 Cassini Huygens 51 Jenniskens 51 supermassive black holes 51 comet Hale Bopp 51 novas 51 X ray spectrometer 51 detect gamma rays 51 high redshift galaxies 51 BLG #Lb 51 Hipparcos 51 Comet Hartley 2 51 Planetary Transits 51 infrared wavelengths 51 Trifid Nebula 51 potentially habitable 51 active galactic nucleus 51 asteroid 51 circumstellar 51 NASA Cassini spacecraft 51 interstellar grains 51 baryons 51 Sasselov 51 Keck telescopes 51 MG J# +# 51 Adam Riess 51 tholins 51 asteroids 51 sodium atoms 51 XTE J# 51 Geminga 51 SN #C 51 galaxy NGC 51 Keck telescope 51 gamma ray photons 51 Bullet Cluster 51 type 1a supernovae 51 fluorescent nanoparticles 51 astrophysical 51 galaxy NGC# 51 Coma Cluster 51 Nasa spacecraft 51 XO 3b 51 astronomical observations 51 gravitational wobbles 51 G#.# +#.# 51 nebula 51 Geminid meteors 51 moons circling 51 X ray pulses 51 KamLAND 51 neutral mass spectrometer 51 permanently shadowed craters 51 cosmic rays 51 Diviner 51 NASA Kepler telescope 51 antiparticle 51 Herbig Ae Be 51 helium atoms 51 redshift 51 phyllosilicates 51 IRAS #-# 51 gravitational interactions 51 Wilkinson Microwave Anisotropy Probe 51 meter Keck telescopes 51 #P/Churyumov-Gerasimenko 51 ESO telescopes 51 Jovian moons 51 particle detectors 50 Solar TErrestrial RElations Observatory 50 Cygnus Lyra region 50 NASA Chandra 50 star Proxima Centauri 50 TNOs 50 constellation Auriga 50 stellar occultations 50 bolometers 50 Convection Rotation 50 ionized hydrogen 50 planets astronomers 50 gamma rays 50 supersymmetry 50 constellation Sagittarius 50 Kepler spacecraft 50 Muchachos Observatory 50 binary quasar 50 Arches Cluster 50 Mandushev 50 Cosmic Microwave Background 50 Crab Pulsar 50 constellation Cetus 50 supermassive black hole 50 Oort Cloud 50 Mamajek 50 galaxy M# [001] 50 lunar craters 50 Churyumov Gerasimenko 50 VY Canis Majoris 50 starburst galaxy 50 Andromeda halo 50 barred spiral galaxy 50 comets asteroids 50 Tarantula nebula 50 PSR J# +# 50 Higgs boson particle 50 comet nucleus 50 Astrophysics Cambridge Mass. 50 constellation Lyra 50 asteroidal 50 Saturn Cassini 50 hadron 50 Wide Angle Search 50 Pluto Eris 50 proplyds 50 galactic cores 50 mu Arae 50 spiral nebulae 50 galactic bulge 50 supergiant star 50 muon neutrinos 50 exoplanets planets outside 50 NASA Fermi Gamma 50 exoplanetary systems 50 Terrestrial Planet Finder 50 Oort cloud 50 relativistic particles 50 Microlensing 50 Dauphas 50 Mini TES 50 mesons 50 moon Enceladus 50 Saturn Enceladus 50 Cosmic rays 50 blue supergiant 50 biosignatures 50 zodiac constellations 50 constellation Cygnus 50 moon Io 50 Optical Gravitational Lensing Experiment 50 strange quark 50 planet Gliese #c 50 star Beta Pictoris 50 Keck Telescope 50 CRISM 50 interstellar dust particles 50 smallest exoplanet ever 50 stellar occultation 50 Toutatis 50 equatorial regions 50 Kuiper Belt Object 50 interstellar dust 50 nebulas 50 Jupiter Ganymede 50 substorm 50 Trojan asteroids 50 SCP #F# 50 NASA Kepler spacecraft 50 filamentary structure 50 Dwarf galaxies 50 infall 50 UCDs 50 HiRISE image 50 ESA Integral 50 Enceladus 50 gravitational waves 50 cosmic phenomena 50 Galileo spacecraft 50 Helix nebula 50 Krimigis 50 Elenin 50 Sagittarius dwarf galaxy 50 NASA Cassini 50 Mössbauer 50 supernova explosions 50 Martian meteorites 50 NASA STEREO 50 Heliospheric Observatory SOHO 50 Lagoon Nebula 50 globular star 49 Wolf Rayet star 49 reflection nebula 49 radial velocity measurements 49 Voyager spacecraft 49 infrared interferometry 49 boson 49 Venusian atmosphere 49 Stephan Quintet 49 Hubble Space Telescope HST 49 orbiting Saturn 49 Samuel Oschin Telescope 49 blue straggler 49 rovers Spirit 49 Pegasi b 49 Supernovae 49 antihelium 49 thermonuclear reactions 49 Helix Nebula 49 Comet #P/Churyumov-Gerasimenko 49 Trapezium 49 Kuiper belt object 49 extrasolar planet HD #b 49 Cat Paw Nebula 49 BLG #L 49 gravitational lens 49 orbited Jupiter 49 van Arkel discovery 49 asteroids orbiting 49 IRAS 4B 49 Kepler Mission 49 exosphere 49 circular orbits 49 lunar crust 49 moons orbiting Pluto 49 NGC# 49 planet HD#b 49 orbiting gamma ray 49 orbiting Chandra 49 STEREO spacecraft 49 starquakes 49 gravitational lenses 49 constellation Aquarius 49 R#a# 49 spectral signature 49 ionized gases 49 submillimeter 49 spectral fingerprints 49 sterile neutrino 49 WM Keck Observatory 49 muon neutrino 49 planetesimals 49 Mars Odyssey spacecraft 49 astrometric 49 Sara Seager 49 Spitzer infrared spectrograph 49 amateur skywatchers 49 Explorer WISE 49 spectroscopic 49 comet McNaught 49 Gamma rays 49 gravitationally lensed 49 #gy 49 neutrino 49 Type Ib 49 Jonathan Lunine 49 Great Observatories 49 gamma ray flares 49 HIP #b 49 proto galaxies 49 Ulysses spacecraft 49 cometary material 49 Butterfly Nebula 49 spherical halo 49 comet Boethin 49 solar corona 49 magnetospheres 49 VB #b 49 VLBA observations 49 nebula NGC 49 asteroid Ceres 49 cosmic cannibal 49 antihelium 4 49 HESS telescopes 49 OGLE 49 VLTI 49 Io Europa 49 THEMIS spacecraft 49 Wilkinson Microwave Probe 49 zodiacal light 49 S/# P2 49 tidally locked 49 spacecraft orbiting 49 SPICAM 49 Herschel telescope 49 planet Gliese 49 Epsilon Indi 49 spectrographs 49 magnetospheric 49 infalling gas 49 interstellar dust grains 49 -# degrees centigrade [001] 49 ultraviolet imaging spectrograph 49 assumed planets circling 49 super Earths orbiting 49 Tauri Sb 49 Super Earths 49 auroral 49 Gemini constellation 49 neutrino particles 49 GeV 49 HiRISE camera aboard 49 HD #b [001] 49 Comet Halley 49 PSR B# +# 49 PSR B# 48 Saturnian moons 48 spectral fingerprint 48 cosmic ray 48 asterism 48 neutralino 48 antiproton 48 Goldilocks planet 48 submillimeter wavelengths 48 shadowy craters 48 gravitational lensing 48 Fermi Gamma ray 48 pointings 48 foreground galaxy 48 RXTE 48 moon Europa 48 CMEs 48 planet WASP #b 48 unmanned probes 48 photometer 48 Astrophysicists 48 superheavy element 48 Martian crater 48 impactors 48 celestial bodies 48 rocky extrasolar planet 48 Saturnian moon 48 emission nebula 48 Alfven waves 48 constellation Scorpius 48 constellation Eridanus 48 suns 48 Milky Way 48 carbonate globules 48 radial velocities 48 galaxies nebulae 48 elliptical orbits 48 Saturn outermost 48 IBEX spacecraft 48 Fornax cluster 48 Giovanni Cassini 48 elliptical galaxy NGC 48 Doppler shifts 48 SINFONI 48 Hubble Telescope 48 occultation 48 neutrinos 48 innermost planet 48 meteoroids 48 constellation Vulpecula 48 MINOS 48 optical interferometry 48 phosphorescence 48 kaons 48 spiral galaxy 48 antihydrogen atoms 48 Noctilucent clouds 48 X ray emitting 48 icy comets 48 meteoroid 48 Kepler 9b 48 supersymmetric 48 dwarf spheroidal galaxies 48 Stephane Udry 48 APXS 48 van Dokkum 48 PASADENA Calif. Astronomers 48 Svedhem 48 Mpc 48 spectrographic 48 robotic landers 48 Kepler Space Telescope 48 plutoid 48 protoplanetary 48 Fermi LAT 48 orbiting observatories 48 SMM J# 48 Triangulum 48 noble gases 48 mesosphere 48 SIM PlanetQuest 48 RY Sagittarii 48 habitable zone 48 Exoplanets 48 spectral signatures 48 constellation Ursa Major 48 moons orbiting Saturn 48 SN #D 48 chemical composition 48 Neptune Uranus 48 muons 48 SNe Ia 48 robot rovers 48 ejecta 48 gravity warps 48 interstellar medium 48 diffraction patterns 48 Very Large Telescope 48 neutrino detectors 48 WISE telescope 48 particle detector 48 HII regions 48 proton antiproton collisions 48 Pleiades star 48 moon Mab 48 protoplanets 48 Galactic cosmic rays 48 Comet Elenin 48 solar neutrinos 48 supernova SN 48 planets constellations 48 Heterodyne Instrument 48 constellation Orion 48 spinning neutron 48 Orbiter LRO 48 solar flares 48 subsurface ocean 48 spherically symmetric 48 photometric 48 Saturnian moon Titan 48 HARPS spectrograph attached 48 Quaoar 48 Eridani 48 spacecraft flyby 48 Planck telescope 48 EPOCh 48 Jupiter Saturn 48 hexagonal mirrors 48 NASA twin rovers 48 infrared spectrometers 48 maser emission 48 star Fomalhaut 48 coronal mass ejections CMEs 48 RS Oph 48 spiral galaxy NGC 48 orbiting Cassini spacecraft 48 IntergalaticEarth 48 polarimetry 48 Harvard exoplanet hunter 47 supernovae explode 47 NASA Voyager spacecraft 47 SEGUE 47 neutrino mass 47 Planck satellite 47 GRB# 47 V# Mon 47 WFC3 47 cosmic ray collisions 47 Cassini 47 auroras 47 radioactive nuclei 47 inner Oort Cloud 47 Puppis 47 Coma cluster 47 constellation Perseus 47 Orionid 47 zodiacal dust 47 fainter 47 energetic electrons 47 VHE gamma rays 47 particles WIMPs 47 volcanic moon Io 47 planetary atmospheres 47 infrared spectra 47 planetary alignments 47 telescopes astronomers 47 galactic nuclei 47 Saturn outermost moon 47 antiprotons 47 MiniBooNE 47 atmospheric neutrinos 47 Lunar Reconnaissance Orbiter LRO 47 orbiting Hubble Space Telescope 47 spinning neutron stars 47 RX J# 47 NASA rovers 47 Martian surface 47 absorption spectra 47 YORP effect 47 geochemists 47 particle acceleration 47 gravitational radiation 47 outermost planet 47 millimeter wavelengths 47 chondrules 47 Anthony Remijan 47 neutron spectrometer 47 Makemake 47 Uranus Neptune 47 visible wavelengths 47 Orion constellation 47 submillimetre 47 Omega Nebula 47 Avishay Gal Yam 47 proto cluster 47 WMAP satellite 47 nicknamed Xena 47 ultraluminous galaxy 47 rover Opportunity 47 aerosol particles 47 Tevatron experiments 47 robotic rovers 47 hydrogen helium 47 RMC #a 47 infalling 47 Gamma ray burst 47 Charon Pluto 47 astrobiologists 47 giant gaseous planets 47 NASA Cosmic Background 47 Jupiter Saturn Uranus 47 MARSIS radar 47 submillimeter galaxies 47 Stassun 47 eccentric orbits 47 corona 47 Aurigid 47 meteoritic material 47 GLAST telescope 47 Trifid 47 Comet NEAT 47 sunspot 47 Pluto moon Charon 47 Gravitational waves 47 presolar grains 47 optical spectra 47 mineralogical composition 47 permanently shadowed 47 Cepheus 47 shorter wavelengths 47 Sgr 47 Laser Interferometer Gravitational Wave 47 SMBHs 47 Chandra X ray 47 QQ# 47 Astrophysics MOA 47 antimatter particles 47 Rosetta lander 47 Mars Orbiter Camera 47 smallest extrasolar planet 47 S/# P 47 Active Galactic Nuclei 47 orbital resonance 47 SUSY 47 planetary orbits 47 dimming starlight 47 bolide