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(Click for frequent words.) 76 galaxies 74 spiral galaxy 72 elliptical galaxies 71 dwarf galaxy 70 dwarf galaxies 69 Milky Way 69 quasar 69 planetary nebulae 69 supernovae 68 galaxy clusters 68 globular clusters 68 supermassive black holes 68 planetary nebula 68 galaxy cluster 67 globulars 67 red supergiants 67 Andromeda Galaxy 67 Milky Way galaxy 66 merging galaxies 66 nebula 66 neutron stars 66 active galactic nuclei 66 Milky Way Galaxy 66 galaxy NGC 66 neutron star 65 quasars 65 elliptical galaxy 65 brown dwarfs 65 starburst galaxies 65 galaxy 65 AGNs 65 distant galaxies 65 planets 65 rocky planets 65 red supergiant 65 supermassive black hole 64 ULIRGs 64 protostars 64 globular cluster 64 supernovas 64 Orion Nebula 64 SN #A 64 starburst galaxy 64 supernova explosions 64 GRBs 64 nebulae 64 X ray emission 64 luminous galaxies 63 gravitationally bound 63 Eta Carinae 63 Andromeda galaxy 63 stellar nurseries 63 distant quasars 63 interacting galaxies 63 Type Ia supernovae 63 magnetars 63 Virgo cluster 63 galactic disk 62 brown dwarf 62 SN #gy 62 galactic clusters 62 gravitational interactions 62 colliding galaxies 62 accretion disk 62 supernova explosion 62 magnetar 62 Type Ia supernova 62 protostar 62 elongated orbits 62 barred spiral galaxy 62 spiral galaxy NGC 62 KBOs 62 transiting planets 62 supernova remnants 62 distant galaxy 62 planets orbits 62 nebular 62 supernova remnant 62 constellation Cassiopeia 62 constellation Ursa Major 62 interstellar clouds 61 eclipsing binary 61 X ray wavelengths 61 Type 1a supernovae 61 HD#b 61 Omega Centauri 61 planets orbiting 61 novae 61 exoplanets orbiting 61 protoplanetary disk 61 galactic mergers 61 hot Jupiters 61 supermassive 60 Coma Cluster 60 galactic halo 60 Large Magellanic Cloud 60 galactic bulge 60 HM Cancri 60 tidal tails 60 constellation Taurus 60 type Ia supernovae 60 Orion nebula 60 Wolf Rayet stars 60 protoplanets 60 NGC# 60 protoplanetary disks 60 Magellanic Clouds 60 millisecond pulsars 60 Trifid Nebula 60 planemos 60 elliptical galaxy NGC 60 Small Magellanic Cloud 60 circumstellar disk 60 WASP #b 59 galaxy M# [002] 59 Neutron stars 59 Galaxies 59 Saturn rings 59 Type Ia 59 terrestrial planets 59 X ray binary 59 supernova 59 gravitationally 59 asterism 59 gamma ray bursts 59 HD #b [002] 59 planet HD #b 59 SMBH 59 Henize #-# 59 P/# A2 59 Kuiper belt 59 Bullet Cluster 59 blue supergiant 59 Kuiper belt objects 59 Virgo Cluster 59 giant elliptical galaxies 59 galaxies collide 59 metallicity 59 ejecta 59 type Ia supernova 59 Supernovae 59 icy moons 59 pulsars 59 circumstellar disks 59 distant supernovae 59 lensing galaxy 59 globular star 59 sunlike stars 58 comets 58 Milky Way halo 58 gamma ray emission 58 Spiral galaxies 58 HII regions 58 Eagle Nebula 58 circular orbits 58 Beta Pictoris 58 constellation Hercules 58 giant elliptical galaxy 58 SN#A 58 emission nebula 58 blue straggler 58 reflection nebula 58 Hot Jupiters 58 Antennae Galaxies 58 Kuiper Belt objects 58 fainter objects 58 constellation Sagittarius 58 constellation Virgo 58 AB Aurigae 58 blazar 58 distant quasar 58 blazars 58 foreground galaxy 58 astronomers 58 Tarantula Nebula 58 planet orbits 58 constellation Centaurus 58 J# +# [002] 58 RS Ophiuchi 58 transiting planet 58 accretion disks 58 exoplanets 57 occultations 57 Wolf Rayet star 57 nuclei 57 Galilean moons 57 atomic nuclei 57 Beta Pictoris b 57 CoRoT #b 57 Orion constellation 57 millisecond pulsar 57 Fornax cluster 57 Crab Nebula 57 Epsilon Eridani 57 protoplanet 57 proplyds 57 gamma ray burst 57 Rosette Nebula 57 redshift 57 Bok globules 57 extrasolar 57 circumstellar 57 eclipsing binaries 57 exoplanet orbiting 57 Planetary nebulae 57 Arches Cluster 57 hypervelocity stars 57 Gamma ray bursts 57 gamma rays 57 Epsilon Aurigae 57 extrasolar planets 57 accreting 57 gaseous planet 57 Red Rectangle 57 Comet Holmes 57 Galilean satellites 57 Carina Nebula 57 extragalactic 57 filaments 57 planet orbiting 57 Gravitational waves 57 WIMPs 57 ionized hydrogen 57 galactic cores 57 supergiant star 57 active galactic nucleus 57 vortices 57 silicate dust 57 exo planets 57 chondrules 57 planets orbiting stars 57 pulsar 57 GQ Lupi 57 super Earths 56 corona 56 proto planetary disks 56 gaseous planets 56 galaxy NGC# 56 TrES 4 56 BP Psc 56 planets moons 56 intrinsic brightness 56 Helix Nebula 56 Fomalhaut b 56 rotating neutron stars 56 GRB #B 56 nebulosity 56 galaxy formation 56 Lagoon Nebula 56 ionized gas 56 neutralinos 56 spherically symmetric 56 Supernova #A 56 planetary nebulas 56 interstellar cloud 56 Cepheids 56 gravitational lensing 56 filamentary structure 56 solar nebula 56 cosmological distances 56 moonlets 56 infall 56 Pleiades star 56 GRB # 56 habitable planets 56 baryonic matter 56 dense clumps 56 particles WIMPs 56 interstellar dust 56 baryons 56 superfluid 56 Globular clusters 56 observable universe 56 antiparticles 56 distant galaxy clusters 56 sunlike star 55 proto galaxies 55 constellation Aquarius 55 Carina constellation 55 supergiant stars 55 filamentary structures 55 orbiting planets 55 planetesimals 55 SN #D 55 orbits 55 Pleiades cluster 55 GJ #b [001] 55 sized planets orbiting 55 planets circling 55 redshifts 55 Enceladus 55 planets orbiting sun 55 microquasar 55 asteroidal 55 exoplanet 55 auroral 55 Cancri 55 noctilucent clouds 55 eccentric orbits 55 coronagraph 55 Seyfert galaxies 55 baryon 55 star Gliese 55 X ray binaries 55 Earth magnetosphere 55 Hanny Voorwerp 55 dynamical evolution 55 ultraviolet wavelengths 55 planet WASP #b 55 intracluster 55 exosolar planets 55 filamentary 55 X ray emitting 55 constellation Leo 55 elliptical orbits 55 constellation Carina 55 astronomical objects 55 habitable zones 55 star Beta Pictoris 55 cluster NGC 55 planetary embryos 55 sodium atoms 55 afterglows 55 comet nucleus 55 Geminga 55 gravitational interaction 55 Sagittarius dwarf galaxy 55 Mimas 54 V# Mon 54 Upsilon Andromedae 54 Trifid 54 antimatter particles 54 retrograde orbit 54 Cepheid variables 54 AU Mic 54 prominences 54 submillimeter galaxies 54 KH #D 54 SN #E 54 galactic collisions 54 galaxy M# [001] 54 baryonic 54 relativistic particles 54 Kuiper Belt Objects 54 ESO PR 54 subatomic particles 54 reionization 54 exoplanetary 54 spiral nebulae 54 electron neutrinos 54 spacetime 54 infalling 54 interstellar medium 54 supernovae explosions 54 shorter wavelengths 54 microlensing events 54 moons orbiting 54 atoms 54 dwarf spheroidal galaxies 54 Monoceros 54 Ring Nebula 54 circumstellar dust 54 nebula NGC 54 XMM Newton 54 Noctilucent clouds 54 celestial object 54 Trapezium 54 optical wavelengths 54 planetesimal 54 neutrinos 54 NGC #A 54 MG J# +# 54 Earthlike planets 54 Triangulum 54 RS Oph 54 SMBHs 54 Proxima Centauri 54 GJ#b 54 Solar System 54 protoplanetary discs 54 HD# [002] 53 Trojan asteroids 53 CoRoT satellite 53 nucleosynthesis 53 chemical abundances 53 Dumbbell Nebula 53 starbursts 53 VY Canis Majoris 53 faraway galaxies 53 Saturn moons 53 magnetic fields 53 spherical halo 53 neutrino 53 quark gluon plasma 53 spatial dimensions 53 GALEX 53 constellation Andromeda 53 gravitational radiation 53 positrons 53 retrograde orbits 53 celestial bodies 53 Betelgeuse 53 Toutatis 53 Kuiper Belt object 53 moons 53 Cat Paw Nebula 53 constellation Eridanus 53 X ray pulses 53 planet Uranus 53 constellation Scorpius 53 inhabitable planets 53 axions 53 nucleobases 53 Gliese #e 53 HL Tau 53 Triangulum Galaxy 53 Type Ia supernovas 53 constellation Coma Berenices 53 Orionids 53 Jupiter moon Io 53 collisional 53 faint galaxies 53 Magnetars 53 comet 53 moon Ganymede 53 Doradus 53 luminosities 53 Voorwerp 53 constellation Lyra 53 hydrogen atoms 53 masers 53 visible wavelengths 53 moon Io 53 Sagittarius B2 53 torus 53 SDSS II 53 photosphere 53 Lyman alpha 53 interstellar dust clouds 53 nebulas 53 kaons 52 gamma ray emitting 52 nucleons 52 auroras 52 Hyades cluster 52 Fermi telescope 52 moonlet 52 globular cluster M# 52 radial velocity 52 aurorae 52 astrophysical phenomena 52 CoRoT 7b 52 Hubble observations 52 relativistic jets 52 Pulsars 52 antiparticle 52 PZ Tel 52 coronal mass ejections 52 Saturn magnetosphere 52 SN #C 52 Coma cluster 52 zodiacal light 52 planets orbiting distant 52 brightest supernova 52 comets orbiting 52 constellation Cetus 52 helium atoms 52 highly magnetized neutron 52 Gemini constellation 52 Saturnian moon 52 supermassive stars 52 ULP cepheids 52 Saturnian moons 52 waxing crescent moon 52 Active Galactic Nuclei 52 X ray telescopes 52 pointings 52 Zeta Ophiuchi 52 gravitational lens 52 branes 52 Kuiper Belt 52 cosmic rays 52 Galaxy Evolution 52 Higgs bosons 52 Helix nebula 52 supersymmetric particles 52 Oort cloud 52 ionised gas 52 constellation Cygnus 52 spiral galaxy M# 52 brightnesses 52 GJ #b [002] 52 planets comets 52 constellation Pegasus 52 arcseconds 52 transiting exoplanets 52 mesons 52 W boson 52 gravitational lenses 52 magnetosphere 52 CMEs 52 Geminid meteors 52 gravitational waves 52 Hale Bopp 52 trans Neptunian objects 52 astrophysical 52 outermost planets 52 binary asteroid 52 singularities 52 celestial objects 52 Fomalhaut 52 coronal mass ejections CMEs 51 crystalline silicates 51 antineutrinos 51 Cancri e 51 hadrons 51 lunar crust 51 solar corona 51 muons 51 B mesons 51 Elliptical galaxies 51 relativistic protons 51 Stephan Quintet 51 infrared wavelengths 51 Gondolo 51 gravitational microlensing 51 moons Io 51 helium nuclei 51 protoplanetary 51 galactic nuclei 51 spheroidal 51 astrophysicists 51 zodiac constellations 51 Cosmic rays 51 diffraction pattern 51 particles 51 planetary orbits 51 TrES 51 supercontinents 51 IRAS #-# 51 extrasolar planet 51 X ray observatories 51 SCP #F# 51 moon Mimas 51 Corot 9b 51 TW Hydrae 51 outer planets 51 Andromeda Galaxy M# 51 magnetic monopoles 51 Veil Nebula 51 impactors 51 carbonaceous chondrites 51 meteoroids 51 ringed planet 51 massless particles 51 sunspots 51 OGLE TR #b 51 outer layers 51 NEAs 51 BP Piscium 51 spherical particles 51 Gamma rays 51 XO 3b 51 Geminids 51 planets astronomers 51 fainter 51 Tauri Sb 51 redshifted 51 Orionid meteors 51 constellation Auriga 51 dusty disks 51 Beehive Cluster 51 atomic particles 51 cosmic microwave background 51 AUs 51 Bug Nebula 51 spicules 51 fermions 51 star Proxima Centauri 51 Martian meteorites 51 mantle plumes 51 CoRoT 9b 51 Gliese #c 51 PSR J# 51 zodiacal constellations 51 UDFy # 51 cosmic phenomena 51 galactic 51 XTE J# 51 polar vortex 51 constellation Ophiuchus 51 stellar occultation 51 astrophysical objects 51 muon neutrino 51 Pegasi 51 unaided eye 51 gravity warps 51 magnetospheric 51 Tarantula nebula 51 hypernova 50 tau neutrinos 50 interferometry 50 magnetotail 50 muon 50 electroweak 50 Mpc 50 optical telescopes 50 HAT P 50 arcminutes 50 galactic cosmic rays 50 Canis Major 50 GeV 50 waxing gibbous moon 50 Butterfly Nebula 50 Comet Tempel Tuttle 50 asteroids 50 volcanic moon Io 50 Uranus 50 Cepheid variable 50 Extrasolar planets 50 cometary material 50 photons particles 50 gravitational attraction 50 galaxy Andromeda 50 IRAS 4B 50 X ray Observatory 50 supernovae explode 50 planets Uranus 50 magnetic reconnection 50 particles emitted 50 supernova SN 50 Evolution Explorer 50 SNe 50 Higgs particle 50 occulted 50 coronal loop 50 substorm 50 superdense neutron star 50 #gy 50 Dwarf galaxies 50 sun corona 50 GRB# 50 fermion 50 gravitational perturbations 50 binary quasar 50 lightwaves 50 gamma ray observatory 50 icy comets 50 Small Magellanic Clouds 50 prograde 50 dense neutron stars 50 basaltic rocks 50 star Fomalhaut 50 weakly interacting 50 energetic electrons 50 potentially habitable planets 50 rotating neutron 50 photons 50 Perseus Cluster 50 chromosphere 50 diffuse aurora 50 luminosity 50 Bose Einstein condensates 50 solar flares 50 ionized gases 50 Pluto Charon 50 particle acceleration 50 Oort Cloud 50 cometary debris 50 energetic cosmic rays 50 Corona Australis 50 NGC 50 XMM Newton observations 50 CMB photons 50 ultraluminous galaxy 50 extrasolar planets orbiting 50 solar minima 50 jet contrails 50 Earthlike 50 millimeter wavelengths 50 gravitational tides 50 Antennae galaxies 50 asteroids comets 50 Comet Hartley 50 infrared wavelength 50 planet transits 50 extrasolar planetary systems 50 dimers 49 Perseids 49 cirrus 49 PSR J# +# 49 earthlike planets 49 gravitational pulls 49 Type 1a supernova 49 exosphere 49 PSR B# +# 49 celestial sphere 49 G#.# +#.# 49 transiting exoplanet 49 Comet Machholz 49 NASA Voyager spacecraft 49 constellation Orion 49 binary asteroids 49 Spitzer Space Telescope 49 jovian 49 Cygnus X 49 ejecta blanket 49 general relativity 49 inhomogeneous 49 VHE gamma rays 49 RMC #a 49 planetoids 49 asteroids orbiting 49 Iapetus 49 solitons 49 colloidal crystals 49 R Coronae Borealis 49 inner asteroid belt 49 dust enshrouded 49 constellation Perseus 49 Dwarf Galaxies 49 macroscopic objects 49 cosmic cannibal 49 J#.# [001] 49 gamma ray telescopes 49 gamma ray bursts GRBs 49 sundog 49 Jupiter Saturn Uranus 49 supercontinent 49 VLTI 49 GRB 49 neutrino mass 49 dwarf planets 49 COROT 49 Jovian moons 49 gravitational redshift 49 rotational axis 49 sterile neutrinos 49 supersymmetry 49 Sedna 49 quantum particles 49 organic molecules 49 electrons orbiting 49 quasicrystal 49 constellation Pisces 49 Canes Venatici 49 ionized particles 49 meteoritic material 49 Astronomers 49 dynamical 49 assumed planets circling 49 RRATs 49 Jupiter Saturn 49 Corot 7b 49 planets asteroids 49 Delta Aquarids 49 superclusters 49 constellation Aquila 49 constellation Monoceros 49 phyllosilicates 49 Comet Lulin 49 Gravitational lensing 49 carbonate minerals 49 Kuiper belt object 49 hexagonal mirrors 49 planetary transits 49 Exoplanets 49 gamma ray photons 49 HD# [005] 49 zodiacal dust 49 spectroscopic observations 49 coronal loops 49 pions 49 diffract 49 SNR #-#.# 49 Pleiades 49 constellation Draco 49 starlight 49 wavelengths 49 galactic nucleus 49 Comet Halley 49 comet Hale Bopp 49 orbits Saturn 49 exoplanetary systems 49 spatially resolved 49 magma ocean 49 exoplanets planets 49 TNOs 48 phonons 48 Eridanus 48 velocity dispersion 48 Super Earths 48 spectroscopic 48 Syrtis Major 48 superstrings 48 heavily cratered 48 subatomic 48 meteoroid 48 Wolszczan 48 proto planetary disk 48 Kepler #b 48 tau neutrino 48 VB #b 48 hydrogen nuclei 48 constellation Gemini 48 Einstein cosmological constant 48 maser emission 48 rubidium atoms 48 Aurigae 48 Crab Pulsar 48 morphologies 48 solar radii 48 quasiparticles 48 silicates 48 constellation Ara 48 mu Arae 48 Virginis 48 thermonuclear reactions 48 Comet Hale Bopp 48 Maunder minimum 48 moons Phobos 48 constellation Cepheus 48 proto cluster 48 antiprotons 48 volcanic plumes 48 HIP #b 48 earthshine 48 high redshift galaxies 48 lobate scarps 48 interstellar dust grains 48 SNe Ia 48 cosmological theories 48 Comet Hartley 2 48 V# Puppis 48 elongated orbit 48 neutrons 48 CAIs 48 planet HD#b 48 HD #b [001] 48 Eridani 48 supersolid 48 slender crescent 48 gamma ray flares 48 Circinus X 1 48 Omega Nebula 48 proton 48 asteroid belt 48 periodic dimming 48 optical spectra 48 ecliptic 48 OGLE TR 48 crescent Moon 48 Delta Cephei 48 Konacki 48 highly elliptical orbits 48 orbiting 48 CMB radiation 48 hadron 48 Spitzer infrared spectrograph 48 stellar occultations 48 placental mammals 48 faintest galaxies 48 SUSY 48 Puppis 48 electrons 48 Quaoar 48 Comet Elenin 48 subatomic particle 48 Adam Riess 48 galaxies nebulae 48 femtosecond timescale 48 sunspot 48 nucleon 48 Quadrantids 48 obscuration 48 Astrophysical 48 periodicities 48 star Spica 48 occultation 48 polarimetry 48 Astrophysicists 48 Phaethon 48 comet Lulin 48 wavefunction 48 Gliese #d 48 heliosphere 48 Earthlike planet 48 microlensing 48 bosons 48 positronium atoms 48 coronal mass ejection 48 Cassiopeia 48 RXTE 48 electron spins 48 Jupiter magnetosphere 48 polaritons 48 Saturn aurora 48 Mandushev 47 chondrites 47 spectroscopically 47 z ~ 47 PKS #-# 47 southern constellation Carina 47 BLG #Lb 47 Orionid 47 Andromeda halo 47 Saturn Uranus 47 halos 47 magnetospheres 47 missing baryons 47 muon neutrinos 47 stony meteorites 47 blobs 47 gibbous 47 Jupiter moons 47 arcsecond 47 olivine 47 Leonids 47 trimers 47 cosmic strings 47 Carinae 47 Chi Cygni 47 runaway thermonuclear 47 water vapor 47 dirty snowballs 47 outer corona 47 electron positron 47 Earth radii 47 waning crescent moon 47 elliptical shapes 47 CLG J# # 47 interstellar molecules 47 orbital angular momentum 47 excitons 47 Scorpii 47 Andromeda 47 tidally 47 substorms 47 fading afterglow 47 magnetic excitations 47 gravitons 47 Earth magnetotail 47 Saturn outermost ring 47 ultracold atoms 47 supersymmetric 47 orbital resonance 47 quantum particle 47 Haumea 47 comet McNaught 47 diffraction patterns 47 supergiants 47 precessing 47 infalling gas 47 gaseous 47 Gliese #g 47 comet Tempel Tuttle 47 RX J# 47 Black Holes 47 icy moon Enceladus 47 oxygen atoms 47 Upsilon Andromedae b 47 superluminal 47 submillimeter wavelengths 47 quarks 47 collimated 47 COROT exo 3b 47 Bose Einstein condensate 47 dye molecules 47 lithium atoms 47 Hipparcos 47 Great Orion Nebula 47 electron neutrino 47 RY Sagittarii 47 tholins 47 exciton 47 protoplanetary disc 47 distant suns 47 Area Telescope LAT 47 punctate 47 comet tail 47 submillimeter 47 alpha particles 47 photometry 47 landmasses 47 numerical simulations 47 planetary magnetospheres 47 prokaryotes 47 Saturnian 47 emit X rays 47 antihelium 4 47 spherical 47 hydrated minerals 47 silicate mantle 47 gravitational 47 Saturn outermost 47 Cassini flyby 47 cosmological 47 Venusian atmosphere 47 infrared imager