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(Click for frequent words.) 65 Proxima Centauri 59 planets 59 planets orbiting 59 star Proxima Centauri 59 Epsilon Eridani 59 habitable planets 58 Andromeda galaxy 58 Andromeda Galaxy 57 galaxy 57 Milky Way Galaxy 56 Upsilon Andromedae 56 distant galaxy 56 Milky Way galaxy 55 potentially habitable planets 55 exoplanets orbiting 55 Gliese #c 54 terrestrial planets 54 Puppis 54 habitable planet 54 galactic 54 Earthlike planets 54 planets circling 54 planet orbiting 54 outer planets 54 Solar System 54 moons orbiting 53 Beta Pictoris 53 Cepheus 53 Earths orbiting 53 Triangulum 53 Kepler 9c 53 Oort Cloud 53 transiting planet 53 eclipsing binary 53 Eridani 52 Gliese 52 Betelgeuse 52 GQ Lupi 52 constellation Pegasus 52 HD #b [002] 52 Large Magellanic Cloud 52 Tau Ceti 52 exoplanet orbiting 52 inhabitable planets 52 radial velocity 52 exoplanets 52 Eta Carinae 52 PZ Tel 52 planets orbiting stars 52 Cassiopeia 51 Sedna 51 HD#b 51 planetoids 51 orbiting 51 planet orbits 51 Orion nebula 51 Orion Nebula 51 Gliese #d 51 constellation Cetus 51 WASP #b 51 HD# [002] 51 supergiant star 51 Pluto Charon 51 TrES 4 51 constellation Vulpecula 51 moons Phobos 51 habitable worlds 50 Kuiper Belt Objects 50 X ray binary 50 constellation Ursa Major 50 Camelopardalis 50 brown dwarfs 50 exoplanets planets 50 Andromeda 50 asteroid 50 constellation Sagittarius 50 galaxy M# [002] 50 Achernar 50 constellation Hercules 50 constellation Andromeda 50 gaseous planet 50 Pleiades cluster 50 Cancri 50 cosmic cannibal 50 planets orbiting sun 50 interstellar 50 sized planets orbiting 50 alien civilizations 50 asteroid belt 50 Wolszczan 50 innermost planet 50 constellation Aquarius 50 Cepheid variable 50 planetary 50 Milky Way 50 constellation Cassiopeia 50 exoplanetary 50 extrasolar planets 49 extrasolar 49 planets orbits 49 earthlike planets 49 Globular Cluster 49 extrasolar planetary systems 49 COROT 49 Antennae Galaxies 49 constellation Lyra 49 constellation Cygnus 49 Monoceros 49 orbits 49 celestial sphere 49 planets orbiting distant 49 circumstellar disks 49 Scorpius 49 rocky planets 49 Ring Nebula 49 HL Tau 49 celestial object 49 Epsilon Aurigae 49 Tarantula Nebula 49 supernovas 49 mu Arae 49 Eagle Nebula 49 Orion Belt 49 Earths 49 retrograde orbit 49 CoRoT 48 red supergiant 48 Nibiru 48 nebula 48 globular cluster 48 spiral galaxy 48 Zeta Ophiuchi 48 Fomalhaut 48 planetoid 48 SIRTF 48 planetary nebulae 48 OGLE TR 48 Beta Pictoris b 48 globular clusters 48 magnetar 48 XO 3b 48 Solar TErrestrial RElations Observatory 48 Virgo cluster 48 asteroid Vesta 48 Cepheid variables 48 planet HD #b 48 brown dwarf 48 Mandushev 48 AU Mic 48 Earth asteroids 48 transiting planets 48 constellation Carina 48 gravitationally bound 48 protostar 48 HAT P 48 distant galaxies 48 Pegasi 48 super Earths 48 extraterrestrial civilizations 48 Fomalhaut b 48 brightest supernova 48 exoplanet 48 Toutatis 48 constellation Puppis 47 millisecond pulsar 47 gravitational microlensing 47 star Gliese 47 supernova 47 extragalactic 47 Venusian 47 outermost planet 47 exo planets 47 telescope 47 sunlike star 47 dwarf spheroidal 47 Konacki 47 galaxies 47 asterism 47 eccentric orbits 47 observable universe 47 Exoplanets 47 Cepheids 47 constellation Auriga 47 Exoplanet 47 cluster NGC 47 comet 47 Earthlike planet 47 Kuiper Belt object 47 Kuiper belt objects 47 jovian 47 Saturn moons 47 constellation Centaurus 47 constellation Libra 47 highly elliptical orbit 47 Carina constellation 47 galaxy M# [001] 47 Uranus 47 Beta Centauri 47 distant supernovae 47 sunlike stars 47 Trapezium 47 constellation Draco 47 Gliese #e 47 parsecs 47 galaxy Andromeda 47 Oort cloud 47 asteroids 47 planet Uranus 47 universe 46 Milky Way halo 46 Earthlike 46 GRBs 46 constellation Aries 46 hypervelocity stars 46 Galilean moons 46 supernova remnant 46 extrasolar planet 46 cosmos 46 habitable zones 46 protoplanetary disk 46 Mars 46 exo planet 46 Dumbbell Nebula 46 Upsilon Andromedae b 46 gamma ray burst 46 comets orbiting 46 constellation Taurus 46 Corot 7b 46 Supernova #A 46 BLG #L 46 pulsar 46 Galaxies 46 occulted 46 Jovian moons 46 RY Sagittarii 46 TrES 46 #P/Churyumov-Gerasimenko 46 ecliptic plane 46 Kuiper Belt Object 46 supernovae 46 starburst galaxy 46 Hipparcos 46 orbital resonance 46 redshift z = 46 distant quasar 46 HD #b [001] 46 supernova explosion 46 quasars 46 Comet Machholz 46 Kepler #b 46 J# +# [002] 46 Wolf Rayet star 46 Asteroid 46 Canes Venatici 46 constellation Virgo 46 constellation Scorpius 46 supernova remnant Cassiopeia 46 Universe 46 Martian 46 outer space 46 Magellanic Clouds 46 Sombrero Galaxy 46 SN #gy 46 quasar 46 fainter 46 Super Earths 46 elongated orbits 46 starburst galaxies 46 protoplanet 46 millisecond pulsars 46 R Coronae Borealis 46 extrasolar worlds 46 photometry 46 Virgo Cluster 45 Comet Holmes 45 BP Psc 45 planet TrES 45 constellation Aquila 45 parsec 45 Corot 9b 45 exoplanets planets outside 45 Orion constellation 45 GJ#b 45 CoRoT 9b 45 KH #D 45 planets moons 45 AUs 45 Cygnus Lyra region 45 Ursa Minor 45 Kuiper belt 45 Voorwerp 45 IRAS #-# 45 Omega Centauri 45 heliopause 45 planetary nebula 45 Comet Hartley 2 45 globular cluster M# 45 galactic nuclei 45 Saturn Cassini 45 metallicity 45 ESO VLT 45 Kuiper Belt objects 45 exosolar planets 45 Epsilon Indi 45 Gemini constellation 45 XMM Newton 45 Olympus Mons 45 galaxy cluster 45 retrograde orbits 45 star Fomalhaut 45 radial velocity technique 45 nebular 45 Phobos 45 Nasa spacecraft 45 constellation Perseus 45 Comet #P/Churyumov-Gerasimenko 45 constellation Cepheus 45 Earth 45 celestial objects 45 planet 45 dwarf galaxies 45 constellation Leo 45 globular star 45 Hyades 45 planemos 45 comets 45 Henize #-# 45 X ray observatories 45 Gliese #g 45 Voyager probes 45 Jupiter Saturn 45 constellation Hydra 45 planet Gliese #g 45 Goldilocks planet 45 Comet Elenin 45 interplanetary 45 HIP #b 45 planets asteroids 45 unaided eye 45 faraway galaxy 45 planet WASP #b 45 neutron star 44 constellation Monoceros 44 Churyumov Gerasimenko 44 constellation Ara 44 HM Cancri 44 icy moons 44 Drake Equation 44 constellation 44 X ray wavelengths 44 proto galaxies 44 X ray observatory 44 Aurigae 44 interstellar distances 44 planet Gallifrey 44 nebulae 44 coronal mass ejections CMEs 44 astrometry 44 dwarf galaxy 44 astronomical objects 44 spiral galaxy Messier 44 Metroids 44 supernovae explosions 44 Transiting 44 plutoids 44 Kepler spacecraft 44 Lagoon Nebula 44 celestial bodies 44 Small Magellanic Cloud 44 interstellar space 44 Valles Marineris canyon 44 martian 44 moons 44 extrasolar planets orbiting 44 Earth radii 44 blue supergiant 44 gravitationally 44 AB Aurigae 44 cosmological distances 44 Helix Nebula 44 planet transits 44 orbiting planets 44 tidal bulge 44 Pleiades 44 P/# A2 44 Earth orbit 44 Kuiper Belt 44 Eridanus 44 KBOs 44 outermost planets 44 Fornax cluster 44 Deimos 44 CoRoT 7b 44 Fermi telescope 44 binary asteroid 44 Bug Nebula 44 Crab Nebula 44 masers 44 Extrasolar Planets 44 stargate 44 luminous galaxies 44 Pluto 44 Comet Hartley 44 novae 44 zodiac constellations 44 UDFy # 44 moons circling 44 Lyrae 44 Lagrangian 44 Sasselov 44 occultations 43 gamma ray emission 43 Hot Jupiters 43 interstellar dust clouds 43 Scorpii 43 Mpc 43 GJ #b [001] 43 SN #A 43 giant elliptical galaxy 43 reflection nebula 43 extrasolar planetary 43 CoRoT #b 43 X ray telescopes 43 redshift 43 perihelion 43 magnetars 43 comets asteroids 43 Pinwheel Galaxy 43 Algol 43 gravitational perturbations 43 Asteroid Belt 43 Sagittarius B2 43 stellar nurseries 43 HD# [005] 43 solar corona 43 merging galaxies 43 constellation Serpens 43 solar flares 43 extraterrestrial civilization 43 circular orbits 43 stellar occultations 43 spiral galaxy NGC 43 moon Ganymede 43 Kuiper belt object 43 Martian crater 43 SIM PlanetQuest 43 Supernovae 43 comet Hale Bopp 43 RS Ophiuchi 43 VY Canis Majoris 43 planets Uranus 43 Triangulum Galaxy 43 photosphere 43 Red Rectangle 43 TW Hydrae 43 Trojan asteroids 43 Coma Cluster 43 Rosette Nebula 43 STEREO 43 Astronomers 43 detect gravitational waves 43 distant quasars 43 Cancri e 43 constellation Eridanus 43 tidally locked 43 constellation Orion 43 periodic dimming 43 Comet Churyumov Gerasimenko 43 planetary alignments 43 comet Churyumov Gerasimenko 43 Plutonian 43 southern constellation Carina 43 NASA Far Ultraviolet 43 gamma ray observatory 43 Astrophysicists 43 Comet Halley 43 astrophysical objects 43 V# Sgr 43 globulars 43 smallest exoplanet 43 gravitational lenses 43 wormhole 43 GJ #b [002] 43 Hanny Voorwerp 43 Arcturus 43 Astronomers Discover 43 reionization 43 elongated orbit 43 Relations Observatory STEREO 43 protoplanets 43 inter planetary 43 galactic disk 43 elliptical galaxies 43 Diviner 43 EPOXI 43 Pluto Eris 43 Earthlings 43 Cygnus X 43 elliptical orbits 43 Saturn moon 43 spectroscopic observations 43 Planck satellite 43 Jupiter Ganymede 43 NASA STEREO 43 zodiacal constellations 42 Agol 42 XTE J# 42 asteroids orbiting 42 Comet Lulin 42 spiral nebulae 42 Solar Orbiter 42 GRB # 42 occultation 42 fist widths 42 Uranus Neptune 42 Hubble Telescope 42 type Ia supernovae 42 ESA Cluster 42 Canis Major 42 RX J# 42 Andromeda Galaxy M# 42 astronomers 42 Makemake 42 Uranian 42 stargates 42 radial velocities 42 protostars 42 Hale Bopp 42 Kepler 42 asteroidal 42 Spitzer infrared spectrograph 42 Enceladus 42 Quaoar 42 Kepler 9b 42 interstellar dust grains 42 terraformed 42 permanently shadowed craters 42 Big Bang Illingworth 42 pulsars 42 comet hurtling 42 Supergiant 42 supermassive 42 planets constellations 42 supermassive black hole 42 intrinsic brightness 42 telescopes 42 GALEX 42 holodeck 42 microquasar 42 VIRTIS 42 infrared telescopes 42 Hubble 42 galaxy NGC 42 Cassini Huygens 42 galactic mergers 42 Gerard Kuiper 42 Gaensler 42 Viking Lander 42 Cassini spacecraft orbiting 42 Doradus 42 trans Neptunian objects 42 moon Deimos 42 highly elliptical orbits 42 Cosmic Microwave Background 42 CoRoT satellite 42 coronagraph 42 planetary orbits 42 extraterrestrial UFOs 42 Extrasolar 42 Galatica 42 supergiant stars 42 Mimas 42 Mars Odyssey spacecraft 42 Venusian atmosphere 42 NASA Cassini 42 binary 42 Cosmic Evolution 42 SNe Ia 42 constellations 42 fainter objects 42 astrophysical phenomena 42 spacefaring 42 constellations Cygnus 42 Carinae 42 STEREO mission 42 Planetary Transits 42 galaxy formation 42 NASA Kepler 42 coronal loops 42 Kepler Space Telescope 42 transiting exoplanets 42 orbital inclination 42 brightnesses 42 Venus Climate Orbiter 42 faraway planets 42 lightyears 42 accretion disk 42 ion propulsion 42 spaceship 41 Geminga 41 meteors 41 origins spectrograph 41 intracluster 41 Coma Berenices 41 Madhulika Guhathakurta 41 Perseus Cluster 41 Comet Hale Bopp 41 habitable zone 41 baryon 41 novas 41 infall 41 Kepler Mission 41 circumstellar disk 41 radial velocity method 41 thermonuclear fusion 41 zodiacal dust 41 aurorae 41 aliens 41 orbiting telescopes 41 red supergiants 41 Deneb 41 SDSS telescope 41 Biker Mice 41 optical wavelengths 41 neutron spectrometer 41 Delta Cephei 41 plutoid 41 Seth Shostak 41 arcseconds 41 NASA Kepler spacecraft 41 Muchachos Observatory 41 elliptical galaxy 41 BP Piscium 41 hot Jupiters 41 infalling 41 Convection Rotation 41 Jupiter moons 41 NASA Kepler telescope 41 solar nebula 41 circular orbit 41 Gravity Probe 41 constellation Canis Major 41 constellation Pisces 41 gamma ray bursts 41 HIRES spectrometer 41 Stargates 41 planetary Transits 41 stargazer 41 supernova SN 41 Beehive Cluster 41 Hubble Space Telescope HST 41 VHE gamma rays 41 Hydrae 41 Methone 41 supernovae explode 41 Halley comet 41 Mars Phobos 41 IRC +# 41 distant galaxy clusters 41 Alycia Weinberger 41 moonlet 41 planet Gliese #c 41 AGNs 41 Cygni 41 Comet NEAT 41 Alderaan 41 moon Charon 41 planets astronomers 41 SEGUE 41 Astronomical Units 41 Jenniskens 41 Spitzer Space Telescope 41 RRATs 41 comet nucleus 41 S/# P2 41 planetary surfaces 41 comet chaser 41 Harlow Shapley 41 ultraviolet wavelengths 41 type Ia supernova 41 spiral galaxies 41 circumstellar 41 solar radii 41 VB #b 41 comet #P/Churyumov-Gerasimenko 41 aphelion 41 unmanned probes 41 comet orbit 41 arcminutes 41 interplanetary spacecraft 41 Keck telescope 41 JDEM 41 PSR B# +# 41 Edmond Halley 41 James Fanson 41 Astrophysics Cambridge Mass. 41 EGRET 41 inner asteroid belt 41 Asteroids 41 teleporting 41 synchronous orbit 41 Jupiter Saturn Uranus 41 Red Planet 41 intergalactic 41 constellation Ophiuchus 41 Hubble Constant 41 Arches Cluster 41 QQ# 41 Tauri Sb 41 asteroid Ceres 40 Corona Borealis 40 astrophysical 40 Saturnian moons 40 Redshift 40 redshifts 40 NASA THEMIS 40 dust enshrouded 40 Voyager spacecraft 40 Goldilocks zone 40 Gondolo 40 Ophiuchi 40 Cosmological 40 GRB #B 40 ringed planet 40 protoplanetary disc 40 Teleporting 40 Habitable Zone 40 starship 40 OSIRIS REx 40 Bullet Cluster 40 NEAs 40 SpaceWeather.com 40 Bootes 40 Trifid 40 NASA Fermi Gamma 40 V# Puppis 40 Bok globules 40 Horsehead Nebula 40 celestial 40 celestial equator 40 Hubble observations 40 extraterrestial 40 homeworld 40 icy comets 40 Neutron stars 40 prograde 40 gamma rays 40 Submillimeter Array 40 constellation Coma Berenices 40 auroral 40 CMEs 40 planet HD#b 40 HiRISE image 40 NASA Goddard 40 colliding galaxies 40 active galactic nuclei 40 spacecraft Cassini 40 comet Lulin 40 Lutetia 40 neutrinos 40 twin Voyager spacecraft 40 gaseous planets 40 ray Space Telescope 40 2MASS 40 protoplanetary discs 40 cosmic ray detector 40 asteroids comets 40 Valles Marineris 40 Iapetus 40 Astrophysics MOA 40 Cat Paw Nebula 40 Galilean satellites 40 proto planetary disk 40 airglow 40 Saturn rings 40 Jovian moon 40 Rubi Ka 40 Shackleton crater 40 sidereal 40 outerspace 40 Wolf Rayet stars 40 NICMOS 40 microlensing events 40 Boktai 40 dwarf spheroidal galaxies 40 Planets 40 Ursa Major 40 orbiting telescope 40 SkyScout 40 Batarian 40 STEREO spacecraft 40 Owen Gingerich 40 zodiacal light 40 Pieter van Dokkum 40 gravitational interactions 40 adaptive optics 40 Tarantula nebula 40 orbital rendezvous 40 interstellar cloud 40 Grillmair 40 blue straggler 40 gravitational pulls 40 OGLE TR #b 40 slender crescent 40 Andromedae 40 Coma cluster 40 SDSS 40 Vulpecula 40 telescope atop Mauna 40 Swift Tuttle 40 telescopes astronomers 40 Orionids 40 ESA Herschel 40 Type Ia supernovae 40 Magnetosphere 40 orbital 40 Magnetars 40 Lylat 40 wavefunction 40 neutrino 40 Oscillations 40 Cometary 40 Ringed Planet 40 asteroid flyby 40 New Horizons spacecraft 40 BepiColombo 40 astrophysicists 40 cosmic collisions 40 protoplanetary disks 40 neutralinos 40 blazar 40 axions 40 Nasa Kepler 40 astronomy 40 constellation Canes Venatici 40 supernova explosions 40 Ultraviolet Imaging Spectrograph 40 Dwarf Planet 40 WHIM 40 Evolution Explorer 40 Vourlidas 40 Ulysses spacecraft 40 orbit 40 interacting galaxies 40 interstellar boundary 40 Heliospheric Observatory SOHO 40 Epoxi 40 blackholes 40 Galactic Plane 40 hypervelocity star 40 T Tauri 40 Ringworld 40 galactic cosmic rays 40 EPOXI mission 40 Astronomically 40 satellites orbiting Earth 40 Nebula 40 stellar occultation 40 X ray emission 40 Project Ozma 40 #C# [009] 40 moon Mimas 40 RR Lyrae 39 spacecraft 39 Orionis 39 nebulosity 39 Gerhard Schwehm 39 THEMIS Image 39 interstellar dust 39 Celestial Pole 39 ecliptic 39 Pegasus constellation 39 redshifted 39 supermassive black holes 39 interstellar medium 39 astrometric 39 moon Enceladus 39 Hellas Basin 39 Suzaku 39 Jupiter 39 gravitational wave 39 Voyager spacecraft flew 39 moon Io 39 Tycho Brahe 39 orbiting Hubble Space Telescope 39 arcsecond 39 constellations planets 39 Avishay Gal Yam 39 orbital velocity 39 lensing galaxy 39 Galaxy Evolution 39 Io Europa 39 neighboring Andromeda galaxy 39 Werthimer 39 Huygens descent 39 Crab Pulsar 39 galactic empire 39 Astrophysical 39 celestial observations 39 Stephan Quintet 39 Halley Comet 39 planetesimals 39 neutron stars 39 Little Dipper 39 Philae lander 39 ESA Integral 39 Type Ia supernovas 39 Gamma ray bursts 39 cosmic 39 barred spiral galaxy 39 Orionid 39 heliosphere 39 ROSAT 39 spaceward 39 Type Ia supernova 39 Orbiting 39 rotating neutron 39 Jodrell Bank 39 emission nebula 39 supernova remnants 39 Habitable 39 C1XS 39 Laser Interferometer Space 39 cosmic ray 39 orbital eccentricity 39 DIXI 39 spatial dimensions 39 magnetospheric 39 orbiting gamma ray 39 active galactic nucleus 39 La Silla Chile 39 Extrasolar planets 39 SN #D 39 moon Europa 39 orbiting Chandra 39 Xavier Bonfils 39 hubble 39 Saturnian 39 particle detectors 39 galactic cores 39 gravitational tugs 39 spacecrafts 39 subatomic particle 39 Pleiades star 39 Quantum Theory 39 Multiverse 39 star Spica 39 imaging spectrometer 39 Butterfly Nebula 39 celestial mechanics 39 Neptune Uranus 39 Higgs bosons 39 Neukum 39 MARSIS 39 Lunar Prospector 39 Terrestrial Planet Finder 39 Keck Interferometer 39 exoplanetary systems 39 elliptical galaxy NGC 39 lunar landers 39 Cor Caroli 39 interferometric observations 39 hyperspace 39 ULIRGs 39 Apophis asteroid 39 Explorer WISE 39 starlight 39 eclipsing binaries 39 Japan Hayabusa spacecraft 39 Gliese #G 39 Earthling 39 geo stationary orbit 39 Helix nebula 39 Very Large Array 39 Big Dipper constellation 39 Planetary nebulae 39 Corona Australis 39 Schawinski 39 telescope Uranus 39 Apokolips 39 aurora 39 moon Mab 39 Habitable Planets 39 Cassini 39 outer corona 39 twin suns 39 discover Fomalhaut 39 planetary transits 39 thin crescent 39 sextillion stars 39 Saturn moons Titan 39 Timothy Spahr 39 Dwarf galaxies 39 submillimetre 39 lunar orbits 39 ULP cepheids 39 largest moon Charon 39 submillimetre wavelengths 39 nasa.gov