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(Click for frequent words.) 79 globular clusters 76 dwarf galaxy 73 elliptical galaxy 72 X ray binary 72 red supergiant 72 galaxies 71 AGNs 71 galaxy NGC 71 globulars 70 Omega Centauri 70 brown dwarf 70 magnetar 70 brown dwarfs 70 galaxy 70 globular star 69 elliptical galaxies 69 quasars 69 starburst galaxy 69 supernova remnant 69 gravitationally bound 69 starburst galaxies 69 Milky Way halo 69 GRBs 69 planetary nebulae 68 eclipsing binary 68 neutron star 68 Milky Way galaxy 68 Eta Carinae 68 galaxy cluster 68 supernova explosion 68 WASP #b 68 supermassive 68 nebula 68 quasar 68 Milky Way Galaxy 67 NGC# 67 supernovae 67 active galactic nuclei 67 SN #A 67 neutron stars 67 Virgo cluster 67 Andromeda Galaxy 67 protoplanetary disk 67 Andromeda galaxy 67 Milky Way 66 supergiant star 66 spiral galaxy 66 Wolf Rayet star 66 dwarf galaxies 66 supermassive black hole 66 supernova 66 giant elliptical galaxy 66 distant galaxy 66 Oort Cloud 66 planetary nebula 66 galaxy M# [002] 66 luminous galaxies 65 planet orbiting 65 merging galaxies 65 cluster NGC 65 Kuiper belt 65 SN #gy 65 red supergiants 65 exoplanet orbiting 65 galaxy clusters 65 transiting planets 65 KBOs 65 Epsilon Eridani 65 protostar 65 constellation Ursa Major 65 galactic mergers 65 Oort cloud 65 millisecond pulsars 65 X ray emission 64 gamma ray burst 64 constellation Cassiopeia 64 supernova explosions 64 protostars 64 microquasar 64 Virgo Cluster 64 spiral galaxies 64 nebular 64 Crab Nebula 64 Kuiper belt objects 64 Fornax cluster 64 TrES 4 64 Type Ia supernova 64 nebulae 64 rocky planets 64 planets orbiting 64 magnetars 64 constellation Virgo 64 J# +# [002] 64 accretion disk 64 terrestrial planets 64 X ray binaries 64 gamma ray bursts 64 protoplanet 64 SMBH 63 astronomers 63 Beta Pictoris 63 HD#b 63 pulsars 63 distant galaxies 63 galaxy M# [001] 63 constellation Cygnus 63 protoplanetary disks 63 proto galaxies 63 baryon 63 millisecond pulsar 63 Type Ia 63 Cepheids 63 giant elliptical galaxies 63 AB Aurigae 63 Small Magellanic Cloud 63 CoRoT #b 63 exoplanets 63 Globular clusters 63 GRB # 63 Orion Nebula 63 CoRoT 7b 63 Type Ia supernovae 63 galactic nuclei 63 moonlet 63 planet HD #b 63 Neutron stars 63 metallicity 63 solar nebula 63 Kepler #b 63 blue supergiant 62 AU Mic 62 HL Tau 62 extragalactic 62 Epsilon Aurigae 62 Lagoon Nebula 62 Tarantula Nebula 62 supernova remnants 62 Large Magellanic Cloud 62 constellation Hercules 62 emission nebula 62 Kuiper Belt object 62 planet WASP #b 62 Orion nebula 62 interacting galaxies 62 Triangulum Galaxy 62 XTE J# 62 sunlike stars 62 circumstellar disks 62 exoplanets orbiting 62 Fomalhaut b 62 circumstellar disk 62 planet orbits 62 exoplanet 62 Arches Cluster 62 supermassive black holes 62 spiral galaxy NGC 62 redshifts 62 redshift 62 hypervelocity stars 62 galactic disk 62 planets orbits 62 astrophysicists 62 HD #b [002] 61 Proxima Centauri 61 constellation Taurus 61 gravitationally 61 constellation Scorpius 61 reionization 61 elliptical galaxy NGC 61 Coma Cluster 61 distant supernovae 61 Hot Jupiters 61 ejecta 61 stellar nurseries 61 luminosities 61 galaxy formation 61 planets 61 Wolf Rayet stars 61 Red Rectangle 61 galaxies collide 61 pulsar 61 active galactic nucleus 61 supernova SN 61 elongated orbits 61 transiting planet 61 G#.# +#.# 61 Henize #-# 61 gravitational interactions 61 GJ #b [002] 61 supernovas 61 constellation Sagittarius 61 Trifid Nebula 61 hot Jupiters 61 GQ Lupi 61 BP Psc 61 super Earths 61 protoplanets 60 astronomical objects 60 GJ #b [001] 60 extrasolar planets 60 neutralinos 60 type Ia supernova 60 moonlets 60 observable universe 60 Kuiper Belt objects 60 barred spiral galaxy 60 constellation Centaurus 60 baryonic 60 galactic halo 60 Eridani 60 habitable planets 60 star Gliese 60 distant quasars 60 reflection nebula 60 trans Neptunian objects 60 Rosette Nebula 60 proto cluster 60 Cat Paw Nebula 60 globular cluster M# 60 gaseous planet 60 constellation Pegasus 60 novae 60 Beta Pictoris b 60 Fomalhaut 60 SN #E 60 SN #C 60 PSR J# 60 Carina Nebula 60 galactic clusters 60 interstellar cloud 60 type Ia supernovae 60 Kuiper belt object 60 planemos 60 Zeta Ophiuchi 59 Geminga 59 Kuiper Belt 59 Hubble observations 59 nebulosity 59 chondrites 59 blue straggler 59 lensing galaxy 59 Gamma ray bursts 59 eccentric orbits 59 colliding galaxies 59 distant quasar 59 constellation Carina 59 constellation Aquarius 59 WIMPs 59 accretion disks 59 sunlike star 59 extrasolar planet 59 ULIRGs 59 blazar 59 GRB #B 59 exoplanetary 59 Upsilon Andromedae 59 Triangulum 59 RY Sagittarii 59 Bullet Cluster 59 extrasolar 59 fainter objects 59 intrinsic brightness 59 blazars 59 Doradus 59 Antennae Galaxies 59 Astronomers 59 Dwarf galaxies 59 Pinwheel Galaxy 58 Hanny Voorwerp 58 Higgs particle 58 proplyds 58 Ring Nebula 58 Canes Venatici 58 Pegasi 58 RX J# 58 constellation Ophiuchus 58 gravitational microlensing 58 interstellar dust 58 constellation Andromeda 58 supergiant stars 58 Cygnus X 58 HD# [002] 58 Beehive Cluster 58 gravitational lenses 58 SNe Ia 58 VY Canis Majoris 58 GJ#b 58 HAT P 58 ionized hydrogen 58 asteroidal 58 comet nucleus 58 icy moons 58 ionized gas 58 Earthlike planet 58 XMM Newton 58 faint galaxies 58 Magnetars 58 boson 58 Cepheid variable 58 Eagle Nebula 58 interstellar clouds 58 infall 58 Cancri 58 HM Cancri 58 extrasolar planetary systems 58 filamentary structure 58 Betelgeuse 58 HIP #b 58 Earthlike planets 58 planets orbiting distant 58 RS Ophiuchi 58 X ray wavelengths 58 SN #D 58 arcseconds 58 Stephan Quintet 58 star Fomalhaut 58 planets orbiting sun 58 XO 3b 58 SCP #F# 58 Active Galactic Nuclei 58 Dumbbell Nebula 58 Schwarzschild radius 57 hypernova 57 Higgs bosons 57 kpc 57 radial velocity 57 chemical abundances 57 Lyman alpha 57 comets 57 BLG #Lb 57 baryons 57 Cepheid variables 57 Scorpii 57 P/# A2 57 Carinae 57 nucleosynthesis 57 cosmological distances 57 Corot 9b 57 Mpc 57 redshifted 57 Gliese #g 57 spiral nebulae 57 Astrophysicists 57 chondrules 57 orbits 57 Bug Nebula 57 inhabitable planets 57 Evolution Explorer 57 constellation Coma Berenices 57 supergiants 57 CAIs 57 Gliese #c 57 retrograde orbit 57 Gliese #d 57 nebula NGC 57 constellation Auriga 57 X ray telescopes 57 Kuiper Belt Object 57 #gy 57 electrons orbiting 57 TrES 57 dwarf spheroidal galaxies 57 Quaoar 57 R#a# 57 SUSY 57 foreground galaxy 57 Kuiper Belt Objects 57 cosmic cannibal 57 binary asteroid 57 GeV 57 accreting 57 Galilean moons 57 noctilucent clouds 57 Sagittarius B2 57 SMBHs 57 supersymmetric particles 56 Trojan asteroids 56 distant galaxy clusters 56 constellation Lyra 56 circumstellar 56 habitable zones 56 axions 56 Seyfert galaxies 56 Earths orbiting 56 X ray Observatory 56 Pluto Charon 56 BP Piscium 56 supergiant 56 protoplanetary 56 constellation Cetus 56 Coma cluster 56 asterism 56 Comet Holmes 56 Galaxy Evolution 56 Orion constellation 56 dynamical evolution 56 jovian 56 SN#A 56 circular orbits 56 brightest supernova 56 Delta Cephei 56 gaseous planets 56 Gravitational waves 56 Pleiades cluster 56 Spitzer Space Telescope 56 Corot 7b 56 constellation Libra 56 W boson 56 filamentary structures 56 T Tauri 56 earthlike planets 56 Monoceros 56 Trifid 56 relativistic particles 56 X ray observatory 56 Type Ia supernovas 56 HD# [005] 56 rotating neutron stars 56 Bok globules 56 galactic bulge 56 Gliese #e 56 galactic 56 plutons 56 Tarantula nebula 56 supersymmetric 56 planets orbiting stars 56 moons orbiting 56 z ~ 56 SDSS II 56 SNe 56 galactic cores 56 afterglows 56 interstellar medium 56 spectroscopically 56 Voorwerp 55 astrophysical 55 CoRoT 55 planetesimals 55 Cancri e 55 cosmic phenomena 55 comets orbiting 55 planetoids 55 particles WIMPs 55 optical wavelengths 55 VLTI 55 IRAS #-# 55 lunar crust 55 habitable worlds 55 COROT 55 protoplanetary discs 55 unaided eye 55 Hawking radiation 55 V# Mon 55 Sedna 55 quark gluon plasma 55 cosmic microwave background 55 UCDs 55 celestial object 55 galactic collisions 55 interstellar dust clouds 55 transiting exoplanet 55 intracluster 55 optical telescopes 55 planet Gliese #g 55 gamma ray emission 55 UDFy # 55 HII regions 55 southern constellation Carina 55 GALEX 55 arcminutes 55 microlensing 55 Supernova #A 55 spinning neutron 55 highly magnetized neutron 55 zodiacal light 55 Toutatis 55 Magellanic Clouds 55 X ray pulses 55 Carina constellation 55 Supernovae 55 nuclei 55 X ray observatories 55 superdense neutron star 55 orbiting planets 55 GRB# 55 Enceladus 55 constellation Vulpecula 55 photosphere 55 Puppis 55 silicate dust 55 cometary material 55 Serpens 55 PZ Tel 55 gravitational radiation 55 Pinwheel galaxy 55 TW Hydrae 55 optical spectra 55 interstellar dust grains 55 planets circling 55 Martian meteorites 55 Sombrero Galaxy 55 cosmological 54 celestial objects 54 supernovae explosions 54 spectroscopic observations 54 spherical halo 54 moon Io 54 Camelopardalis 54 Veil Nebula 54 antimatter particles 54 dust enshrouded 54 gamma ray burst GRB 54 comet 54 mesons 54 TNOs 54 branes 54 ESO VLT 54 microlensing events 54 spectra 54 Epsilon Indi 54 infrared wavelengths 54 Type 1a supernovae 54 comet McNaught 54 Saturn rings 54 gamma rays 54 BLG #L 54 CoRoT 9b 54 Gliese 54 planets asteroids 54 carbonaceous chondrites 54 quantum gravity 54 Mimas 54 SNR #-#.# 54 constellation Leo 54 CLG J# # 54 spacetime 54 smallest extrasolar planet 54 NGC #A 54 gravitational waves 54 impactors 54 baryonic matter 54 constellation Aquila 54 proto planetary disk 54 gravitational wave 54 constellation Bootes 54 X ray emitting 54 extrasolar planetary 54 exo planets 54 occultations 54 RMC #a 54 sized planets orbiting 54 strangelet 54 Trapezium 54 constellation Draco 54 solar corona 54 dense neutron stars 54 gamma ray observatory 54 spherically symmetric 54 exoplanetary systems 54 rotating neutron 54 stellar occultation 54 Murchison meteorite 54 star Proxima Centauri 54 gravitational lensing 54 constellation Orion 54 planets moons 54 subatomic particle 53 QQ# 53 weakly interacting 53 plutoid 53 ultraviolet wavelengths 53 OGLE TR 53 CoRoT satellite 53 cosmologists 53 smallest exoplanet 53 permanently shadowed craters 53 meson 53 neutrino 53 hypervelocity star 53 relativistic protons 53 redshift z = 53 Galaxies 53 tidal tails 53 brightnesses 53 J#.# [001] 53 Hipparcos 53 Earth radii 53 supernovae explode 53 Fermi telescope 53 infalling 53 constellation Perseus 53 spinning pulsar 53 hadrons 53 Cygni 53 Globular Cluster 53 HiRISE image 53 Cassiopeia 53 Helix Nebula 53 Saturnian moon 53 Andromeda Galaxy M# 53 spiral galaxy Messier 53 spectroscopic 53 z = 53 protoplanetary disc 53 Adam Riess 53 R Coronae Borealis 53 Komossa 53 strange quark 53 relativistic jets 53 asteroid belt 53 superdense 53 planet Uranus 53 Galilean satellites 53 ESO telescope 53 Cosmic Microwave Background 53 neutralino 53 UB# [003] 53 sodium atoms 53 planetoid 53 Venusian atmosphere 53 kaons 53 atomic nuclei 53 electroweak 53 CMB radiation 53 magnetic monopoles 53 elliptical orbits 53 Cosmic Microwave Background CMB 53 HD #b [001] 53 masers 53 antiparticles 53 Elliptical galaxies 53 electron neutrinos 53 asteroid 53 fainter 53 Orionids 53 corona 53 orbiting 53 crystalline silicates 53 torus 53 planetesimal 53 cosmological theories 53 supernova remnant Cassiopeia 53 parsec 53 asteroids orbiting 53 SEGUE 53 Pleiades 53 gravitational redshift 53 solar radii 52 Comet Elenin 52 Cosmologists 52 GRB 52 carbonaceous chondrite 52 antiparticle 52 Pleiades star 52 positrons 52 galactic cosmic rays 52 Earth magnetosphere 52 Microlensing 52 cosmic ray 52 ultraluminous galaxy 52 quantum particle 52 Super Earths 52 maser emission 52 atoms 52 PSR B# 52 astrophysical phenomena 52 habitable zone 52 occultation 52 Keck Interferometer 52 silicon monoxide 52 high redshift galaxies 52 Syrtis Major 52 Solar System 52 dirty snowballs 52 exosolar planets 52 Hubble Constant 52 meteoroids 52 Pulsars 52 star Beta Pictoris 52 NEAs 52 constellation Cepheus 52 polarimetry 52 auroral 52 inner asteroid belt 52 substorm 52 moons 52 moon Ganymede 52 faintest galaxies 52 hematite mineral 52 dense clumps 52 neutrons 52 chromosphere 52 zodiacal dust 52 hadron 52 Encke gap 52 subsurface ocean 52 olivine 52 gravitationally lensed 52 WMAP 52 gamma ray flares 52 Horsehead Nebula 52 transiting exoplanets 52 silicates 52 stony meteorites 52 Spiral galaxies 52 S/# P2 52 Wolszczan 52 SMM J# 52 Comet Tempel Tuttle 52 sterile neutrinos 52 magnetospheric 52 asteroids 52 plagioclase 52 Churyumov Gerasimenko 52 spiral galaxy M# 52 submillimeter galaxies 52 MG J# +# 52 helium atoms 52 PSR J# +# 52 RXTE 52 dwarf spheroidal 52 magnetosphere 52 astrophysical objects 52 Tycho supernova 52 gravitational perturbations 52 neighboring Andromeda galaxy 52 planetary embryos 52 Great Orion Nebula 52 meteoritic material 52 fermion 52 retrograde orbits 51 Quadrantids 51 constellation 51 Gondolo 51 cosmic ray collisions 51 COROT exo 3b 51 Sgr 51 atomic nucleus 51 post perovskite 51 gravitational lens 51 spatially resolved 51 wavefunction 51 supermassive stars 51 Astrophysical 51 outermost planets 51 dynamical 51 velocity dispersion 51 Jupiter moon Io 51 RRATs 51 telescopes astronomers 51 Aurigae 51 phyllosilicates 51 mu Arae 51 KH #D 51 energetic electrons 51 magnetic reconnection 51 galaxy NGC# 51 potentially habitable planets 51 gamma ray telescopes 51 sterile neutrino 51 carbonate minerals 51 eclipsing binaries 51 tau neutrinos 51 magma ocean 51 Andromeda 51 deuterium 51 energetic gamma rays 51 superheavy elements 51 extrasolar planets orbiting 51 S/# [001] 51 Pluto Eris 51 Konacki 51 subatomic particles 51 sun corona 51 SIRTF 51 planetary nebulas 51 neutrinos 51 Pieter van Dokkum 51 visible wavelengths 51 exosphere 51 gravitational tides 51 NICMOS 51 periodic dimming 51 Very Large Telescope 51 cosmic rays 51 B mesons 51 innermost planet 51 substorms 51 exo planet 51 planets astronomers 51 cosmic strings 51 moon Enceladus 51 muon neutrinos 51 God Particle 51 planet TrES 51 Canis Major 51 proto planetary disks 51 parsecs 51 arcsecond 51 circumstellar dust 51 Comet Hale Bopp 51 arcsec 51 gravitational interaction 51 Mini TES 51 Jupiter magnetosphere 51 celestial sphere 51 hydrogen helium 51 diffuse aurora 51 astrometry 51 nucleons 51 Saturn outermost 51 moon Mimas 51 electron neutrino 51 exoplanets planets 51 sunspot 51 Serpens Cauda 51 nucleobases 51 inhomogeneities 51 supercontinent 51 2MASS 51 universe 51 IRC +# 51 gamma ray emitting 51 Tauri Sb 51 mantle plumes 51 coronagraph 51 spheroidal 50 Baptistina 50 planets Uranus 50 ESO PR 50 Leonids 50 nucleon 50 interstellar dust particles 50 antineutrinos 50 Butterfly Nebula 50 silicate minerals 50 RS Oph 50 particle acceleration 50 SN #ha 50 Saturn outermost ring 50 outermost planet 50 planetary orbits 50 gravitational 50 Comet Halley 50 photometry 50 moons Phobos 50 Alfven waves 50 prebiotic molecules 50 interferometry 50 icy comets 50 Io Europa 50 Coma Berenices 50 dynamical processes 50 ringed planet 50 galaxy redshift 50 periodic oscillations 50 ejecta blanket 50 OGLE 50 supersymmetry 50 ESO Very Large Telescope 50 Arabia Terra 50 thermonuclear reactions 50 Comet Lulin 50 dipole moment 50 Hale Bopp 50 axion 50 submillimetre wavelengths 50 electron volt 50 Perseus Cluster 50 Omega Nebula 50 inner Oort Cloud 50 Helix nebula 50 GRB #A 50 quark 50 silicate mantle 50 XMM Newton satellite 50 Galileo spacecraft 50 Orionis 50 planetary 50 RHESSI 50 Magellanic Stream 50 planet transits 50 IRAS 4B 50 moon Charon 50 filamentary 50 spherules 50 dwarf planets 50 VHE gamma rays 50 chondritic meteorites 50 HARPS spectrograph attached 50 weak gravitational lensing 50 primitive meteorites 50 neutrino particles 50 constellation Eridanus 50 Z boson 50 lunar highlands 50 planet Gliese #c 50 Halley comet 50 helium nuclei 50 gravitons 50 impactor 50 lunar meteorites 50 energetic cosmic rays 50 singularities 50 submillimeter 50 coronal loop 50 polaritons 50 hydrated minerals 50 ALH# 50 Hyades cluster 50 cosmic ray particles 50 strangelets 50 Olympus Mons 50 lunar craters 50 Mauna Kea Hawaii 50 Earthlike 50 Ophiuchi 50 asteroids comets 50 faraway galaxy 50 spectroscopic measurements 50 PSR B# +# 50 elongated orbit 50 radial velocity technique 50 Herbig Ae Be 50 volcanic moon Io 50 spatial dimensions 50 Valles Marineris 50 Astronomical Units 50 radial velocity method 50 interstellar molecules 50 chondritic 50 elemental abundances 50 constellation Puppis 50 orbits Saturn 50 muons 50 antihydrogen atoms 50 Planetary nebulae 50 V# Puppis 50 zodiac constellations 50 missing baryons 50 heliosphere 50 star Spica 50 Cygnus Lyra region 50 heliosheath 50 plutoids 50 Astrophysical Journal 50 spinning neutron stars 50 Comet Machholz 50 galactic alignment 50 Apophis asteroid 50 Iapetus 50 highly elliptical orbit 50 infalling gas 50 placental mammals 49 mineral olivine 49 planet HD#b 49 inhomogeneous 49 NASA Chandra 49 aurorae 49 Goldilocks planet 49 galaxy Andromeda 49 massless particles 49 bosons 49 sulfur isotope 49 charm quark 49 planetary Transits 49 antiprotons 49 Extrasolar planets 49 binary quasar 49 Supermassive black 49 TGFs 49 excitations 49 Gal Yam 49 starbursts 49 gamma ray photons 49 CHARA 49 Sagittarius dwarf galaxy 49 habitable planet 49 sparticles 49 Bose Einstein condensates 49 magnetic fields 49 cosmic microwave radiation 49 Optical Gravitational Lensing Experiment 49 ecliptic 49 Mandushev 49 outer planets 49 permanently shadowed 49 Einstein equations 49 HARPS instrument 49 Upsilon Andromedae b 49 matter antimatter asymmetry 49 orbital resonance 49 electron positron 49 ionized gases 49 Virginis 49 osmium 49 superfluid 49 abundances 49 RQ#