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(Click for frequent words.) 63 red supergiant 59 magnetar 59 Andromeda galaxy 58 Andromeda Galaxy 57 Milky Way Galaxy 57 Fomalhaut b 57 HD #b [002] 57 Orion Nebula 57 quasar 57 distant galaxy 57 Eta Carinae 56 AU Mic 56 supernovae 56 galaxy cluster 56 gravitationally bound 56 supergiant star 56 transiting planets 56 WASP #b 56 quasars 56 GRBs 55 Milky Way galaxy 55 planet orbits 55 gamma ray burst 55 elliptical galaxy 55 planets orbiting 55 star Gliese 55 transiting planet 55 planet orbiting 55 constellation Virgo 55 galaxies 55 Betelgeuse 55 constellation Centaurus 55 galaxy 54 Gliese #d 54 brown dwarf 54 extrasolar planet 54 Proxima Centauri 54 neutron star 54 globular clusters 54 extrasolar planets 54 pulsars 54 diffuse aurora 54 Fermi telescope 54 Epsilon Aurigae 54 gaseous planet 54 nebula 54 Epsilon Eridani 54 Beta Pictoris b 54 HD#b 54 Beta Pictoris 54 Coma Cluster 54 constellation Ursa Major 54 globular star 53 redder 53 Gamma ray bursts 53 Comet Holmes 53 supernova 53 supernova remnant 53 galaxy M# [002] 53 magnetars 53 Earthlike planets 53 Milky Way 53 Fomalhaut 53 Gliese #c 53 dwarf galaxy 53 exoplanet orbiting 53 AGNs 53 redshift 53 starburst galaxy 53 galaxy NGC 53 Omega Centauri 53 galaxy M# [001] 53 Zeta Ophiuchi 53 distant galaxies 53 constellation Hercules 53 shorter wavelengths 53 pulsar 53 constellation Sagittarius 53 globular cluster 53 planets 52 Kuiper belt object 52 Wolf Rayet star 52 starburst galaxies 52 fainter objects 52 supermassive black hole 52 Upsilon Andromedae 52 radial velocity 52 millisecond pulsar 52 constellation Perseus 52 elliptical galaxies 52 distant supernovae 52 arcseconds 52 luminous galaxies 52 Large Magellanic Cloud 52 exoplanets orbiting 52 HL Tau 52 gamma ray bursts 52 unaided eye 52 sunlike stars 52 GQ Lupi 52 Cancri 52 spiral galaxy 52 X ray wavelengths 52 star Proxima Centauri 52 exoplanets 52 visible wavelengths 52 foreground galaxy 52 constellation Cygnus 52 Kepler #b 52 distant quasar 51 galactic mergers 51 X ray binary 51 blue supergiant 51 constellation Taurus 51 occulted 51 constellation Aquarius 51 brown dwarfs 51 Small Magellanic Cloud 51 Milky Way halo 51 Kuiper Belt object 51 exoplanet 51 comets orbiting 51 super Earths 51 star Fomalhaut 51 constellation Carina 51 X ray emission 51 redshifts 51 GRB #B 51 Virgo cluster 51 spiral galaxies 51 Crab Nebula 51 novae 51 constellation Lyra 51 rocky planets 51 constellation Auriga 51 moon Ganymede 51 Gliese #e 51 Corot 9b 51 supernova explosion 51 metallicity 51 constellation Aries 51 Virgo Cluster 51 Lagoon Nebula 51 protostar 51 V# Mon 51 constellation Pegasus 50 Orion nebula 50 constellation Cassiopeia 50 Magnetars 50 planetary nebula 50 baryonic 50 SN #A 50 supermassive black holes 50 Antennae Galaxies 50 arcsecond 50 perihelion 50 sunlike star 50 redshifted 50 gibbous 50 protoplanet 50 observable universe 50 constellation Gemini 50 TrES 4 50 planets orbiting distant 50 solar corona 50 galactic disk 50 Sagittarius B2 50 planet WASP #b 50 constellation Orion 50 Kuiper Belt Objects 50 Comet NEAT 50 XTE J# 50 CoRoT 7b 50 orbits 50 supernova SN 50 giant elliptical galaxy 50 protostars 50 exo planets 50 interacting galaxies 50 planet transits 50 constellation Leo 50 distant quasars 50 infrared wavelengths 50 Kuiper belt objects 50 photosphere 50 gamma rays 49 spiral galaxy NGC 49 Ring Nebula 49 accretion disk 49 nebulae 49 innermost planet 49 supermassive 49 planet HD #b 49 CoRoT #b 49 Gliese 49 brightest supernova 49 intrinsic brightness 49 elongated orbits 49 XMM Newton 49 SN #gy 49 ultraviolet wavelengths 49 GALEX 49 supernova remnants 49 eclipsing binary 49 galactic cores 49 globulars 49 merging galaxies 49 ringed planet 49 planets orbiting sun 49 habitable planets 49 moonlet 49 TrES 49 Puppis 49 HD# [002] 49 constellation Cetus 49 Cassiopeia 49 type Ia supernovae 49 IRAS #-# 49 AB Aurigae 49 Kepler 9c 49 smallest exoplanet 49 galaxy clusters 49 planet TrES 49 Comet Lulin 49 star Spica 49 moon Charon 49 active galactic nuclei 49 circumstellar 49 GJ#b 49 cluster NGC 49 neutron stars 49 KH #D 49 extrasolar 49 Bok globules 49 SN #D 49 Red Rectangle 49 KBOs 49 Gemini constellation 49 GRB # 48 type Ia supernova 48 interstellar dust 48 OGLE TR 48 dwarf galaxies 48 red supergiants 48 terrestrial planets 48 Tarantula Nebula 48 suns 48 Type Ia supernovae 48 BP Psc 48 Neutron stars 48 Mpc 48 planets orbits 48 trans Neptunian objects 48 gamma ray 48 SMM J# 48 lensing galaxy 48 kpc 48 constellation Andromeda 48 constellation Bootes 48 protoplanetary disk 48 supernovas 48 astronomical objects 48 planets orbiting stars 48 planetary nebulae 48 microquasar 48 X ray pulses 48 extrasolar planets orbiting 48 Geminid meteors 48 ultraluminous galaxy 48 Venusian atmosphere 48 Scorpii 48 nebulosity 48 circumstellar disk 48 RS Ophiuchi 48 corona 48 mu Arae 48 Rosette Nebula 48 waxing crescent moon 48 Bug Nebula 48 constellation Scorpius 48 BP Piscium 48 reflection nebula 48 Corot 7b 48 cosmological distances 48 accretion disks 48 galaxy Andromeda 48 Eagle Nebula 48 arcminutes 48 slender crescent 48 luminosities 48 GRB# 48 Supernovae 48 Chi Cygni 48 gamma ray emission 48 constellation Vulpecula 48 asteroid Vesta 48 P/# A2 47 astronomers 47 planets moons 47 GJ #b [002] 47 cosmic cannibal 47 globular cluster M# 47 VY Canis Majoris 47 gravitational interactions 47 earthlike planets 47 planets circling 47 ULIRGs 47 millisecond pulsars 47 PSR J# 47 Earthlike 47 Astronomical Units 47 Cancri e 47 tidally locked 47 X ray photons 47 Trapezium 47 energetic gamma rays 47 X ray afterglow 47 brightnesses 47 silicate dust 47 planets Uranus 47 stellar occultation 47 MG J# +# 47 infrared radiation 47 circumstellar disks 47 interstellar dust clouds 47 WIMPs 47 Coma cluster 47 blazar 47 comet nucleus 47 GJ #b [001] 47 Helix nebula 47 Gamma rays 47 occultations 47 gravitational waves 47 Perseus cluster 47 electron volts 47 eccentric orbits 47 CoRoT 47 luminosity 47 arcsec 47 radial velocities 47 X ray binaries 47 sunspot 47 habitable zones 47 UDFy # 47 star Beta Pictoris 47 Oort Cloud 47 Galilean moons 47 solar radii 47 BLG #L 47 R Coronae Borealis 47 protoplanetary disks 47 J# +# [002] 47 faint 47 Extrasolar planets 47 Cygnus Lyra region 47 Saturnian moon 47 rotating neutron stars 46 PZ Tel 46 Sedna 46 Fornax cluster 46 optical telescopes 46 GRB #A 46 comet 46 Orion constellation 46 active galactic nucleus 46 jovian 46 constellation Libra 46 bluer 46 auroral oval 46 dimmer 46 COROT 46 Oort cloud 46 supernova explosions 46 submillimetre wavelengths 46 Comet Hartley 2 46 Pleiades star 46 Trifid Nebula 46 Hanny Voorwerp 46 Leonids 46 Comet Elenin 46 extrasolar planet HD #b 46 superdense neutron star 46 icy moons 46 celestial equator 46 inhabitable planets 46 Mimas 46 Doradus 46 planet Uranus 46 afterglows 46 G#.# +#.# 46 Type 1a supernovae 46 Orionid meteors 46 RRATs 46 SIRTF 46 moonlets 46 Hale Bopp 46 optical wavelengths 46 exoplanets planets 46 gravitational interaction 46 Aurigae 46 baryon 46 constellation Monoceros 46 Earthlike planet 46 Pleiades cluster 46 waxing gibbous moon 46 comet Lulin 46 crystalline silicates 46 Geminga 46 rotating neutron 46 X ray telescopes 46 constellation Puppis 46 extragalactic 46 Canes Venatici 46 HAT P 46 starlight 46 Galilean satellites 46 Alpha Centauri 46 asteroidal 46 Dumbbell Nebula 46 GeV 46 TNOs 46 Voorwerp 46 Eridani 46 Cygnus X 46 spectroscopically 46 Lyrids 46 Quaoar 45 Gliese #g 45 distant galaxy clusters 45 periodic dimming 45 reddish hue 45 Orionids 45 Kuiper belt 45 NICMOS 45 Toutatis 45 umbral 45 hypervelocity stars 45 helium atoms 45 outermost planet 45 sized planets orbiting 45 colliding galaxies 45 nebular 45 heavily cratered 45 Jupiter Uranus 45 redshift z = 45 gravitationally 45 cometary debris 45 Encke gap 45 proplyds 45 novas 45 Tarantula nebula 45 spectra 45 SNe Ia 45 proto galaxies 45 waning crescent 45 Saturn rings 45 Seyfert galaxies 45 planemos 45 HUDF 45 umbral shadow 45 blazars 45 Comet Hale Bopp 45 meteoroids 45 faintly visible 45 Beehive Cluster 45 Canis Major 45 habitable worlds 45 orbits Saturn 45 Capricornus 45 Jupiter Ganymede 45 Ophiuchi 45 X ray emitting 45 Type Ia supernova 45 Saturnian system 45 orbiting 45 Comet Hartley 45 Type 1a supernova 45 emit X rays 45 Type Ia 45 Kuiper Belt objects 45 gravitational wave 45 ESO PR 45 moons orbiting 45 gaseous planets 45 SDSS II 45 exosphere 45 Galaxy Evolution 45 asteroid belt 45 Carinae 45 submillimeter wavelengths 45 NEAs 45 exo planet 45 binary quasar 45 aphelion 45 constellation Ara 45 Triangulum 45 SNR #-#.# 45 comet Tempel Tuttle 45 exoplanetary 45 Saturn outermost 45 Very Large Telescope 45 ecliptic 45 spherical halo 45 zodiacal constellations 45 Arches Cluster 45 galactic 45 nucleosynthesis 45 interstellar clouds 45 elliptical galaxy NGC 45 detect gamma rays 45 moons 45 accreting 45 emission nebula 44 Mandushev 44 Cygni 44 Comet McNaught 44 galactic halo 44 neutrino 44 supernovae explosions 44 moon Io 44 celestial objects 44 Saturn Jupiter Uranus 44 longer redder wavelengths 44 moon Enceladus 44 Microlensing 44 spacecraft flyby 44 fading afterglow 44 Magellanic Clouds 44 TW Hydrae 44 comets asteroids 44 interstellar medium 44 Pleiades 44 spatially resolved 44 Coma Berenices 44 Carina constellation 44 microlensing events 44 Epsilon Indi 44 supergiant stars 44 Orionid 44 crescent Moon 44 Halley comet 44 dust enshrouded 44 zodiacal light 44 nebulas 44 thin crescent moon 44 elliptical orbits 44 Monoceros 44 axis wobbles 44 gravitational lens 44 Spitzer Space Telescope 44 photometry 44 Cepheids 44 interstellar cloud 44 Andromeda Galaxy M# 44 Perseus constellation 44 constellation Cepheus 44 coronagraph 44 planetary 44 sunlike 44 reionization 44 protoplanetary 44 waxing crescent 44 X ray observatory 44 R#a# 44 Spitzer infrared 44 submillimeter galaxies 44 HM Cancri 44 bluish 44 celestial object 44 moons Phobos 44 waning gibbous 44 Kuiper Belt Object 44 orbited 44 louder 44 coronal loop 44 constellation 44 NGC# 44 runaway thermonuclear 44 dimmest 44 solar nebula 44 constellation Canis Major 44 infalling gas 44 VLTI 44 coronal holes 44 RY Sagittarii 44 planet HD#b 44 Neptune Uranus 44 Pluto Charon 44 Solar System 44 Triangulum Galaxy 44 Saturn Uranus 44 glow brightly 44 obscuration 44 orbiting planets 44 constellation Ophiuchus 44 picosecond 44 Enceladus 44 extrasolar planetary systems 44 proto cluster 44 Comet Machholz 44 comet tail 44 Comet Tempel Tuttle 44 Lyman alpha 44 celestial sphere 44 submillimeter 44 transiting exoplanets 44 perigee 44 Bullet Cluster 44 cosmic microwave background 44 Lyra constellations 44 Gravitational waves 44 gamma ray flares 44 shorter wavelength 44 HD #b [001] 44 potentially habitable planets 44 penumbral shadow 43 Kuiper Belt 43 Planetary nebulae 43 Uranus 43 constellation Eridanus 43 Tau Ceti 43 Corona Borealis 43 SN#A 43 ionized hydrogen 43 constellation Draco 43 HII regions 43 microlensing 43 infalling 43 ejecta 43 earthlike 43 cosmic ray 43 hot Jupiters 43 supernovae explode 43 SN #C 43 Evolution Explorer 43 gravitational microlensing 43 stellar nurseries 43 planetary transits 43 Helix Nebula 43 Earth radii 43 Pegasi 43 VHE gamma rays 43 spiral galaxy Messier 43 Hot Jupiters 43 planetoid 43 comet Hale Bopp 43 axions 43 outer layers 43 BLG #Lb 43 Charon Pluto 43 Swift Tuttle 43 USSR disintegration 43 Svedhem 43 chromosphere 43 nebula NGC 43 Jupiter moon Io 43 elongated orbit 43 zodiacal dust 43 radial velocity technique 43 infall 43 Sombrero Galaxy 43 dense clumps 43 GRB 43 Astronomers 43 faint galaxies 43 Cepheid variables 43 auroral 43 galactic nuclei 43 thin crescent 43 Wolf Rayet stars 43 infrared wavelength 43 Andromeda 43 Saturnian moons 43 zodiac constellations 43 Methone 43 Earths orbiting 43 planetary nebulas 43 Venus Neptune Uranus 43 constellation Coma Berenices 43 HIP #b 43 Jovian moon 43 magnetospheric 43 retrograde orbit 43 giant elliptical galaxies 43 OGLE 43 sodium atoms 43 Lyrae 43 Carina Nebula 43 energetic electrons 43 planets constellations 43 J#.# [001] 43 afterglows linger 43 gamma ray bursts GRBs 43 waning gibbous moon 43 protoplanetary discs 43 Jovian moons 43 Canis Minor 43 gravitationally lensed 43 circumstellar dust 43 Crab Pulsar 42 gravitational radiation 42 Saturn moons 42 highly magnetized neutron 42 comets 42 planet gravitational tug 42 Ringed Planet 42 Paranal Chile 42 intracluster 42 Mars Uranus 42 gravitational perturbations 42 Pluto Eris 42 Cassini spacecraft orbiting 42 Camelopardalis 42 kelvin 42 asterism 42 spiral galaxy M# 42 spatial dimensions 42 gibbous moon 42 retrograde orbits 42 fuzzy blob 42 starlike 42 outer planets 42 Saturnian 42 XO 3b 42 Stephan Quintet 42 Cat Paw Nebula 42 V# Sgr 42 CoRoT satellite 42 Quadrantids 42 magnetic fields 42 parsec 42 Virginis 42 hydrated minerals 42 magnetotail 42 Comet LINEAR 42 gravity warps 42 OGLE TR #b 42 CMB radiation 42 SDSS 42 Iapetus 42 electron neutrinos 42 baryons 42 positrons 42 Uranus Neptune 42 Pieter van Dokkum 42 noctilucent clouds 42 transiting exoplanet 42 Veil Nebula 42 Cosmic Microwave Background 42 NGC #A 42 volcanic moon Io 42 heliopause 42 supergiant 42 relativistic jets 42 orbital eccentricity 42 gamma rays emitted 42 sunspots 42 inner moons 42 neutrinos 42 emits X rays 42 HIRES spectrometer 42 millimeter wavelength 42 faintest galaxies 42 PKS #-# 42 asteroids 42 galactic clusters 42 supersymmetric particles 42 Type Ia supernovas 42 Orion Belt 42 protons collide 42 spirals inward 42 CMB photons 42 planet Gliese #g 42 chemical abundances 42 elliptical orbit 42 paler 42 dustier 42 Jupiter moons 42 gamma ray emitting 42 Pluto 42 baryonic matter 42 aurorae 42 asteroids orbiting 42 galaxy formation 42 interstellar space 42 RS Oph 42 Uranian 42 CMEs 42 S/# P2 42 blurrier 42 Hawking radiation 42 interferometry 42 galactic bulge 42 dwarf spheroidal galaxies 42 radial velocity method 42 Supernova #A 42 auroral activity 42 Serpens Cauda 42 helium nuclei 42 ionized gas 42 Saturn innermost 42 Scorpius 42 aurora 42 filamentary structure 42 Upsilon Andromedae b 42 Arcturus 42 planet Gliese #c 42 candlepower 42 galaxy NGC# 42 Cepheid variable 42 subatomic particle 42 Perseids 42 Aurigid 42 Phoebe orbits 42 wavelengths 42 cosmic rays 42 astrometry 42 eclipsing binaries 42 spinning pulsar 41 Delta Cephei 41 brightest meteors 41 Herbig Ae Be 41 SUSY 41 barred spiral galaxy 41 gravitational tugs 41 habitable zone 41 exoplanet discoveries 41 backscattered 41 solar flares 41 Samuel Oschin Telescope 41 Mauna Kea Hawaii 41 trillionth 41 gravitational lenses 41 Spiral galaxies 41 glows brightly 41 penumbral 41 dense neutron stars 41 Cosmic Microwave Background CMB 41 starquakes 41 tholins 41 comet McNaught 41 Hubble Ultra 41 spectroscopic observations 41 southern constellation Carina 41 CoRoT 9b 41 Saturn equinox 41 ionized particles 41 neighboring Andromeda galaxy 41 scientist Carolyn Porco 41 luminous 41 ROSAT 41 Infrared Thermal Imaging Spectrometer 41 orbital resonance 41 galaxies collide 41 Comet Halley 41 Wolszczan 41 cosmic microwave radiation 41 reddish 41 Perseus Cluster 41 supernova remnant Cassiopeia 41 AUs 41 hypervelocity star 41 orbited Jupiter 41 Hipparcos 41 Perseid meteors 41 umbra 41 ESA XMM Newton 41 sun corona 41 Eta Aquarids 41 muon neutrino 41 Schwarzschild radius 41 Olympus Mons 41 Spica 41 Neil Gehrels 41 occultation 41 rotational axis 41 haloes 41 habitable planet 41 Beta Centauri 41 largest moon Charon 41 distant supernovas 41 Mamajek 41 Syrtis Major 41 de Pater 41 infrared spectra 41 ESO Very Large Telescope 41 exosolar planets 41 brightest comet 41 smallest extrasolar planet 41 permanently shadowed craters 41 solar prominences 41 constellations Cygnus 41 lightwaves 41 RXTE 41 polar vortex 41 galaxy supermassive black 41 blue straggler 41 Epimetheus 41 GZK cutoff 41 elliptical shapes 41 cosmic 41 Pegasus constellation 41 collimated 41 Gondolo 41 cryovolcanism 41 faint smudge 41 X ray observatories 41 ecliptic plane 41 2MASS 41 Comet #P/Churyumov-Gerasimenko 41 galaxy redshift 41 albedo reflectivity 41 VISTA telescope 41 ESO VLT 41 filaments 41 Halley Comet 41 Pinwheel Galaxy 41 ESO telescope 41 dimly visible 40 Saturn outermost ring 40 brighter 40 ellipse 40 moon Mimas 40 Tycho supernova remnant 40 faint meteors 40 hazier 40 scarps indicating 40 nightside 40 Saturn aurora 40 Uranus Jupiter 40 Geminids 40 Elenin 40 Quadrantid meteor shower 40 Quadrantid 40 interstellar dust particles 40 femtoseconds 40 Geminid 40 airglow 40 lunar crust 40 keV 40 Cepheus 40 gravitational attraction 40 relativistic particles 40 Saturn auroras 40 Hyades cluster 40 Plutoids 40 highly elliptical orbit 40 astrophysical 40 chondrules 40 Saturn moon Iapetus 40 astrophysicists 40 exoplanets planets outside 40 sky darkens 40 fainter meteors 40 UB# [003] 40 electron orbits 40 planets circling stars 40 starbursts 40 particles WIMPs 40 moon Deimos 40 Type Ic supernova 40 optical spectra 40 Komossa 40 Globular Cluster 40 TGFs 40 substorm 40 supermoon 40 Jupiter Saturn 40 maser emission 40 moons Io 40 axion 40 Charon 40 XMM Newton X ray 40 Saturn moon Enceladus 40 gamma ray observatory 40 ULP cepheids 40 meteoritic material 40 Lulin 40 dim 40 Cosmic rays 40 magnification 40 prograde 40 infrared imager 40 Geminids meteor shower 40 yellowish 40 Voyager spacecraft flew 40 Doppler shifts 40 Saturn moon Mimas 40 waning crescent Moon 40 shines brighter 40 parsecs 40 silicon monoxide 40 protoplanets 40 WMAP satellite 40 gamma ray burst GRB 40 photons emitted 40 asteroids comets 40 branes