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(Click for frequent words.) 76 Andromeda galaxy 72 Milky Way Galaxy 72 Milky Way 70 constellation Ursa Major 70 distant galaxy 69 Milky Way galaxy 69 galaxy NGC 68 constellation Cassiopeia 68 Orion Nebula 68 spiral galaxy 68 Virgo cluster 67 Betelgeuse 67 dwarf galaxy 67 spiral galaxies 67 globular cluster 67 cosmic cannibal 67 Eta Carinae 66 Virgo Cluster 66 distant galaxies 66 nebula 66 Large Magellanic Cloud 66 constellation Hercules 66 Proxima Centauri 66 galaxy cluster 66 galaxy M# [001] 66 galaxies 65 galaxy Andromeda 65 galaxy 65 Triangulum 65 Beta Pictoris 65 constellation Andromeda 65 Omega Centauri 65 Crab Nebula 65 constellation Cygnus 65 asterism 65 Fomalhaut b 65 Triangulum Galaxy 65 giant elliptical galaxy 65 Ring Nebula 65 galaxy M# [002] 64 constellation Aquarius 64 constellation Virgo 64 star Proxima Centauri 64 Epsilon Aurigae 64 red supergiant 64 HD #b [002] 64 constellation Taurus 64 spiral galaxy NGC 64 HD#b 64 Antennae Galaxies 64 distant quasar 63 Comet Holmes 63 Galilean moons 63 quasar 63 Orion nebula 63 Eagle Nebula 63 constellation Centaurus 63 starburst galaxy 63 extrasolar planets 63 barred spiral galaxy 63 planets 63 constellation Scorpius 63 supergiant star 63 planets orbiting 63 planet orbiting 63 celestial object 63 Rosette Nebula 63 Kuiper belt 62 extrasolar 62 planet orbits 62 distant supernovae 62 WASP #b 62 Globular Cluster 62 Solar System 62 Pleiades cluster 62 Lagoon Nebula 62 nebulae 62 Comet Lulin 62 star Gliese 62 interacting galaxies 62 gaseous planet 62 constellation Carina 62 Toutatis 62 elliptical galaxy 62 exoplanets orbiting 62 SN #A 62 planetary nebulae 62 Orion constellation 62 globulars 62 supernovae 62 constellation Orion 62 planet Uranus 62 constellation Sagittarius 62 supernova remnant 62 supernova explosion 62 exoplanets 61 Pleiades star 61 constellation Cetus 61 gamma ray burst 61 Puppis 61 exo planets 61 Fermi telescope 61 comet Lulin 61 planets orbits 61 Small Magellanic Cloud 61 Epsilon Eridani 61 fainter objects 61 Oort Cloud 61 Geminga 61 GRBs 61 neutron star 61 extrasolar planet 61 globular clusters 61 transiting planets 61 planetary nebula 61 eclipsing binary 61 transiting planet 61 globular star 61 Milky Way halo 61 brown dwarfs 61 Upsilon Andromedae 61 rocky planets 61 constellation Pegasus 60 brown dwarf 60 constellation Leo 60 Coma Cluster 60 astronomical objects 60 magnetars 60 millisecond pulsars 60 Dumbbell Nebula 60 planets orbiting stars 60 Tarantula Nebula 60 millisecond pulsar 60 Fornax cluster 60 galaxy clusters 60 Orionids 60 pulsar 60 elliptical galaxies 60 supernova 60 quasars 60 Canis Major 60 globular cluster M# 60 neutron stars 60 Exoplanets 60 Pleiades 59 gamma ray bursts 59 HM Cancri 59 Earthlike planets 59 Cancri 59 Comet Hartley 2 59 Quadrantids 59 brightest supernova 59 inhabitable planets 59 GRB #B 59 AGNs 59 Canes Venatici 59 constellation Lyra 59 astronomers 59 Cat Paw Nebula 59 Super Earths 59 supermassive black hole 59 AU Mic 59 dwarf galaxies 59 Beehive Cluster 59 Pinwheel Galaxy 59 Andromeda 59 XMM Newton 59 Fomalhaut 59 slender crescent 59 TrES 4 59 GRB # 59 Kuiper Belt object 59 luminous galaxies 59 constellation Coma Berenices 59 sunlike star 59 GJ #b [001] 59 GQ Lupi 59 Andromeda Galaxy M# 59 gravitationally bound 59 X ray wavelengths 59 galaxies collide 59 COROT 59 lensing galaxy 59 magnetar 59 supernovas 59 galactic disk 59 constellation Eridanus 59 supernova remnants 59 Mpc 59 GJ #b [002] 59 retrograde orbit 59 Beta Pictoris b 59 Red Rectangle 59 galactic 59 occultations 59 Gliese #d 59 Helix Nebula 59 unaided eye 58 NGC# 58 celestial sphere 58 Cepheus 58 constellation Perseus 58 Comet Machholz 58 Cepheids 58 constellation Auriga 58 comet nucleus 58 starburst galaxies 58 Comet Hartley 58 BP Psc 58 spiral galaxy M# 58 Gliese #c 58 merging galaxies 58 Alpha Centauri 58 proto galaxies 58 elliptical galaxy NGC 58 Kuiper Belt Objects 58 exoplanet 58 P/# A2 58 reflection nebula 58 exoplanet orbiting 58 X ray emission 58 protostar 58 Monoceros 58 Oort cloud 58 zodiacal light 58 spiral galaxy Messier 58 celestial objects 58 cosmological distances 58 KBOs 58 fainter 58 stellar nurseries 58 planets orbiting sun 58 Wolf Rayet stars 58 Cassiopeia 58 X ray binary 58 exoplanets planets 58 Saturn rings 58 mu Arae 58 Galaxies 58 galactic halo 58 jovian 58 ringed planet 58 blazars 58 smallest exoplanet 58 Cepheid variables 58 supermassive 58 distant quasars 58 TrES 58 HL Tau 57 TW Hydrae 57 constellation Aquila 57 sunlike stars 57 planet HD #b 57 habitable planets 57 HD# [002] 57 Corot 7b 57 constellation Bootes 57 comet 57 Arches Cluster 57 terrestrial planets 57 colliding galaxies 57 Orion Belt 57 Bullet Cluster 57 redshift 57 Hot Jupiters 57 Hanny Voorwerp 57 Jovian moons 57 active galactic nucleus 57 AB Aurigae 57 Sedna 57 Saturnian 57 supermassive black holes 57 SN #gy 57 Comet McNaught 57 Wolf Rayet star 57 Gliese #g 57 aurorae 57 KH #D 57 accretion disk 57 Eridani 57 Cancri e 57 RY Sagittarii 57 Zeta Ophiuchi 57 Olympus Mons 57 extragalactic 57 planets moons 57 moonlet 57 circumstellar disks 57 GJ#b 57 constellation Aries 57 Cassini flyby 57 star Fomalhaut 57 Perseids 57 ecliptic plane 57 star Spica 57 Saturn Cassini 57 ULIRGs 57 Kuiper Belt objects 57 Carina Nebula 57 Comet Elenin 57 constellation Libra 57 Exoplanet 56 microquasar 56 Carinae 56 foreground galaxy 56 Saturnian moon 56 star Beta Pictoris 56 novae 56 planet Gliese #g 56 nebulosity 56 Coma Berenices 56 Bug Nebula 56 Eridanus 56 Geminids 56 interstellar cloud 56 galactic clusters 56 Hale Bopp 56 icy moons 56 Serpens 56 Galilean satellites 56 Enceladus 56 HAT P 56 CoRoT satellite 56 Syrtis Major 56 Kuiper belt objects 56 orbiting 56 arcminutes 56 earthlike planets 56 Magellanic Clouds 56 constellation Cepheus 56 Kepler #b 56 orbits 56 Galaxy Evolution 56 Earthlike planet 56 emission nebula 56 elongated orbits 56 SMBH 56 Trapezium 56 waxing crescent moon 56 moons orbiting 56 cluster NGC 56 Sombrero Galaxy 56 Quaoar 56 Henize #-# 56 waxing gibbous moon 56 Spitzer Space Telescope 56 OGLE TR 56 hypervelocity stars 56 gamma ray emission 56 moons Phobos 56 constellation Ara 56 arcseconds 56 constellation Draco 56 Carina constellation 56 super Earths 56 extrasolar planetary systems 56 optical wavelengths 55 CoRoT 7b 55 VLBA 55 ESO PR 55 Coma cluster 55 exoplanetary 55 constellation Vulpecula 55 distant galaxy clusters 55 southern constellation Carina 55 Comet NEAT 55 filamentary structure 55 sized planets orbiting 55 NGC #A 55 Mimas 55 gravitational waves 55 Sagittarius B2 55 planemos 55 Lulin 55 proplyds 55 Supernovae 55 moonlets 55 comets 55 Kepler 9c 55 CoRoT #b 55 outermost planets 55 protostars 55 Butterfly Nebula 55 Jupiter Saturn 55 noctilucent clouds 55 gravitational interactions 55 radial velocity 55 constellation Canis Major 55 Trifid 55 crescent Moon 55 GALEX 55 Capricornus 55 X ray telescopes 55 constellation Serpens 55 eccentric orbits 55 Gliese 55 G#.# +#.# 55 binary quasar 55 asteroid Vesta 55 Helix nebula 55 hot Jupiters 55 Voorwerp 55 supernovae explode 55 VY Canis Majoris 55 planets Uranus 55 planetoid 55 galactic mergers 55 microlensing events 55 moon Io 55 red supergiants 55 planets comets 55 gamma ray observatory 55 occultation 55 comet Hale Bopp 55 constellation Ophiuchus 55 Upsilon Andromedae b 55 planet WASP #b 55 Saturnian moons 55 innermost planet 55 SN #D 55 thin crescent moon 55 Cosmic Evolution 55 submillimetre wavelengths 55 outer planets 55 pulsars 55 Leonids 55 CoRoT 55 constellation Hydra 55 protoplanetary disk 55 moon Mimas 55 ultraviolet wavelengths 55 RS Ophiuchi 55 Saturnian system 55 Astronomers 55 ionized hydrogen 55 protoplanet 55 moon Charon 55 planets circling 55 Pluto Charon 55 SIRTF 54 constellations Cygnus 54 occulted 54 infrared telescopes 54 Omega Nebula 54 infrared wavelengths 54 Serpens Cauda 54 moon Ganymede 54 zodiac constellations 54 Great Orion Nebula 54 supernova SN 54 supergiant stars 54 Iapetus 54 intrinsic brightness 54 Horsehead Nebula 54 SDSS II 54 supernova explosions 54 WIMPs 54 blue supergiant 54 active galactic nuclei 54 photosphere 54 protoplanetary disks 54 celestial bodies 54 Kuiper Belt 54 CoRoT 9b 54 UDFy # 54 X ray observatories 54 comet McNaught 54 planet TrES 54 gravitational lenses 54 observable universe 54 comets orbiting 54 neighboring Andromeda galaxy 54 Venusian atmosphere 54 J# +# [002] 54 starlike object 54 Antennae galaxies 54 afterglows 54 masers 54 type Ia supernova 54 microlensing 54 accretion disks 54 Pinwheel galaxy 54 Supernova #A 54 Type Ia supernova 54 Tau Ceti 54 Corona Borealis 54 Andromeda XII 54 Gamma ray bursts 54 gamma ray flares 54 Bok globules 54 protoplanetary 54 Trifid Nebula 54 Comet Hale Bopp 54 Astronomers Discover 54 Extrasolar Planets 54 gravitational interaction 54 Evolution Explorer 54 Comet Halley 54 ray Space Telescope 54 waning crescent Moon 54 Geminid meteors 54 hypervelocity star 54 Doradus 54 Hubble observations 54 blazar 54 ESO VLT 54 Ringed Planet 54 aphelion 54 type Ia supernovae 54 Quadrantid meteor shower 53 BLG #Lb 53 exo planet 53 Earthlike 53 exosolar planets 53 gravitational microlensing 53 Kuiper Belt Object 53 submillimetre 53 baryon 53 Type Ia supernovae 53 constellation Monoceros 53 moons 53 Comet LINEAR 53 Corot 9b 53 habitable zones 53 Scorpius 53 Muchachos Observatory 53 constellation Gemini 53 solar corona 53 gravitational lens 53 Eta Aquarids 53 planet HD#b 53 stellar occultations 53 Achernar 53 Gliese #e 53 optical telescopes 53 circumstellar dust 53 Jupiter moon Io 53 HiRISE image 53 redshifted 53 asteroid belt 53 Tarantula nebula 53 Wolszczan 53 planets orbiting distant 53 constellation Puppis 53 Lyrids 53 Explorer WISE 53 PSR J# 53 Gravitational waves 53 AKARI 53 Churyumov Gerasimenko 53 spatial dimensions 53 Kuiper belt object 53 heliopause 53 trans Neptunian objects 53 HD #b [001] 53 PKS #-# 53 Kepler 9b 53 SNR #-#.# 53 planets astronomers 53 CHARA 53 antimatter particles 53 ultraluminous galaxy 53 ejecta 53 moon Enceladus 53 Saturn moons 53 Higgs particle 53 Planck telescope 53 gamma rays 53 VLTI 53 celestial equator 53 auroral displays 53 Arabia Terra 53 habitable planet 53 protoplanets 53 interstellar clouds 53 Veil Nebula 53 interstellar dust 53 zodiacal constellations 53 Kepler Space Telescope 53 meteors 52 Virginis 52 IRAS #-# 52 orbits Saturn 52 Dwarf Planet 52 Type Ia 52 polar vortex 52 rotating neutron stars 52 Halley comet 52 Stephan Quintet 52 Planck satellite 52 Solar TErrestrial RElations Observatory 52 R#a# 52 ecliptic 52 Pegasi 52 metallicity 52 God Particle 52 retrograde orbits 52 relativistic particles 52 Crab Pulsar 52 asteroids comets 52 ROSAT 52 Lyman alpha 52 asteroidal 52 X ray pulses 52 gravitational perturbations 52 orbiting Saturn 52 Uranus 52 brightnesses 52 solar nebula 52 XO 3b 52 Comet Encke 52 Saturn moon Enceladus 52 GeV 52 La Silla Chile 52 waning gibbous moon 52 extrasolar planets orbiting 52 Type Ia supernovas 52 solar flares 52 Delta Aquarids 52 Dwarf Galaxies 52 moons Europa 52 Earths 52 Orionid 52 asteroids 52 Noctilucent clouds 52 nebulas 52 Taurids 52 mesosphere 52 Space Telescope 52 Ulysses spacecraft 52 GRB# 52 Goldilocks planet 52 Jovian moon 52 Comet Tempel 1 52 Perseus Cluster 52 Keck telescope 52 circumstellar 52 cosmic microwave background 52 Cassini Huygens 52 Neutron stars 52 zodiacal dust 52 Solar Orbiter 52 Scorpii 52 SN #C 52 constellation Pisces 52 hexagonal mirrors 52 Canary Telescope 52 Beta Centauri 52 cometary debris 52 NASA STEREO 52 Great Observatories 52 #P/Churyumov-Gerasimenko 52 SN#A 52 asteroid 52 Perseus constellation 52 Uranian 52 earthshine 52 QQ# 52 spaceweather.com 51 interstellar dust clouds 51 jet contrails 51 spectroscopic observations 51 astrophysical phenomena 51 NASA Cassini 51 Meteor Shower 51 circumstellar disk 51 Camelopardalis 51 LOFAR 51 Perseid shower 51 gravity warps 51 polarimetry 51 constellations 51 planetary Transits 51 COROT 7b 51 infall 51 submillimeter wavelengths 51 reionization 51 Astronomers Find 51 XTE J# 51 Candor Chasma 51 visible wavelengths 51 Jupiter magnetosphere 51 Keck Interferometer 51 arcsecond 51 Fornax 51 substorm 51 sundog 51 SMBHs 51 Perseid meteors 51 Mauna Kea Hawaii 51 elliptical orbits 51 Venusian 51 binary asteroid 51 Asteroid Belt 51 TNOs 51 Spiral galaxies 51 Geminid 51 gravitational lensing 51 nebular 51 WISE infrared 51 Very Large Telescope 51 telescopes 51 aperture telescope 51 OGLE TR #b 51 faint smudge 51 inner asteroid belt 51 submillimeter galaxies 51 planetary embryos 51 Leonid Meteor Shower 51 gibbous moon 51 highly elliptical orbit 51 celestial 51 galactic nuclei 51 antiparticle 51 airglow 51 asteroid Lutetia 51 rocky extrasolar planet 51 Lutetia 51 Saturn moon 51 dwarf spheroidal 51 galactic bulge 51 astrophysical objects 51 faint galaxies 51 Methone 51 Herschel telescope 51 nebula NGC 51 RHESSI 51 auroral 51 asteroids orbiting 51 X ray observatory 51 spiral nebulae 51 Eta Aquarid meteor shower 51 baryonic 51 Earth radii 51 meteoroids 51 Nibiru 51 proto cluster 51 solar radii 51 Geminid meteor shower 51 constellation 51 Earth magnetosphere 51 proto planetary disks 51 Delta Cephei 51 Geminids meteor shower 51 neutralinos 51 NASA Cassini spacecraft 51 Cosmic Microwave Background 51 Cygnus Lyra region 51 meteor shower 51 constellation Fornax 51 axions 51 Active Galactic Nuclei 51 habitable worlds 51 RMC #a 51 interstellar dust particles 51 EPOXI spacecraft 51 planetoids 51 planet transits 51 stellar occultation 51 spacetime 51 Heliospheric Observatory SOHO 51 gravitational wave 51 Cassini 51 interstellar boundary 51 Jenniskens 51 ESO Very Large Telescope 51 Extrasolar planets 51 permanently shadowed craters 51 Trojan asteroids 50 Orionid meteors 50 Earth asteroids 50 Corona Australis 50 Gemini constellation 50 Ursa Minor 50 redshifts 50 Gravitational lensing 50 PSR B# 50 Cygnus X 50 Nasa spacecraft 50 RRATs 50 X ray afterglow 50 Swift Tuttle 50 BLG #L 50 gibbous 50 MG J# +# 50 heavily cratered 50 Via Lattea 50 Hubble Ultra 50 chromosphere 50 meteoroid 50 Flyby 50 Gondolo 50 aurora 50 Cosmic Microwave Background CMB 50 coronal mass ejections CMEs 50 sun corona 50 coronal loop 50 HIP #b 50 neutrinos 50 perihelion 50 V# Mon 50 potentially habitable planets 50 heliosphere 50 sunspot 50 NASA Chandra 50 celestial phenomena 50 Cepheid variable 50 Astrophysical 50 muon neutrino 50 Digitized Sky Survey 50 orbiting Hubble Space Telescope 50 gravitationally 50 VIRTIS 50 Galileo spacecraft 50 infrared imager 50 spherical halo 50 parsecs 50 Orionid meteor shower 50 corona 50 dynamical evolution 50 VB #b 50 Earths orbiting 50 subsurface ocean 50 PSR B# +# 50 ESA XMM Newton 50 gamma ray telescopes 50 Type 1a supernovae 50 lunar perigee 50 tidally locked 50 infrared telescope 50 supersymmetric particles 50 Comet #P 50 spacecraft flyby 50 Hydrus 50 dust enshrouded 50 Cerro Paranal 50 waning crescent moon 50 spectroscopic measurements 50 Pluto Eris 50 transiting exoplanet 50 Elenin 50 extrasolar planet HD #b 50 comet Tempel Tuttle 50 astrophysicists 50 Neptune Uranus 50 CMB radiation 50 kpc 50 SCP #F# 50 Astrophysicists 50 Perseid Meteor Shower 50 S/# [001] 50 Amateur astronomers 50 Galactic Plane 50 orbiting planets 50 planetary nebulas 50 PZ Tel 50 Cassini Spacecraft 50 spinning pulsar 50 SpaceWeather.com 50 Jupiter Uranus 50 relativistic jets 50 Halley Comet 50 umbral shadow 50 Sagittarius dwarf galaxy 50 Black Holes 50 telescope 50 Deneb 50 COROT exo 3b 50 gaseous planets 50 cosmic rays 50 Submillimeter Array 50 Hipparcos 50 Vulpecula 50 interstellar dust grains 50 gamma ray emitting 50 ESA Integral 50 moon Titan 50 Quadrantid 50 lunar craters 50 Saturn moon Iapetus 50 Phaethon 50 positrons 50 supermoon 50 Earthshine 50 Hubble Captures 50 SUSY 50 chondrites 50 fist widths 49 cosmic ray 49 Planets 49 Cometary 49 Magnetars 49 thin crescent 49 Uranus Jupiter 49 Astronomical Units 49 Seyfert galaxies 49 Lyrid meteor shower 49 Fermi Telescope 49 coronal loops 49 protoplanetary discs 49 transiting exoplanets 49 Optical Gravitational Lensing Experiment 49 detect gravitational waves 49 cosmic 49 comet orbit 49 magnetic monopoles 49 EPOXI 49 Io Europa 49 exoplanets planets outside 49 orbital resonance 49 cometary 49 lenticular clouds 49 Samuel Oschin Telescope 49 neutrino 49 astrometry 49 Aurigae 49 coronal mass ejection 49 Jupiter moons 49 #C# [009] 49 periodic dimming 49 imaging spectrometer 49 magnetic reconnection 49 Higgs Boson 49 meteor 49 moons circling 49 SNe Ia 49 Herschel Space 49 Meteor Showers 49 Leonid meteor showers 49 hypernova 49 auroras 49 Spitzer infrared 49 energetic electrons 49 faraway galaxy 49 planet Nibiru 49 aurora australis 49 luminosities 49 HII regions 49 cosmic magnifying glass 49 glowing brightly 49 Gerard Kuiper 49 luminosity 49 circular orbits 49 exosphere 49 Hyades 49 LORRI 49 HD# [005] 49 NEAs 49 Supermassive Black Holes 49 SEGUE 49 Earth 49 rotational axis 49 S/# P2 49 telescope eyepiece 49 cometary material 49 SMM J# 49 ionized gas 49 icy comets 49 tidal tails 49 moon Phobos 49 Kepler spacecraft 49 Solar Dynamics Observatory 49 2MASS 49 RS Oph 49 telescopes astronomers 49 lunar crust 49 orbiting observatories 49 Astrophysics Cambridge Mass. 49 Arcturus 49 planet Gliese #c 49 bolide 49 photons particles 49 SOHO spacecraft 49 Gamma rays 49 Transiting 49 Extrasolar 49 arcsec 49 gravitational attraction 49 ESO telescope 49 Mars Phobos 49 zodiacal constellation 49 Mandushev 49 Giovanni Cassini 49 Comet #P/Churyumov-Gerasimenko 49 NASA CloudSat 49 spacecraft Cassini 49 Perseid meteor showers 49 Palomar Observatory 49 Saturn moons Titan 49 Orientale Basin 49 RXTE 49 V# Puppis 49 Martian meteorites 49 penumbral shadow 49 Convection Rotation 49 Infrared Thermal Imaging Spectrometer 49 earths 49 gravitationally lensed 49 Hyades cluster