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(Click for frequent words.) 77 quasars 76 galaxies 74 supermassive black hole 74 galaxy cluster 73 neutron star 72 X ray emission 72 galaxy clusters 72 supernovae 72 elliptical galaxy 72 magnetar 71 supermassive black holes 71 dwarf galaxy 69 gamma ray burst 69 distant galaxies 69 SN #A 69 spiral galaxies 69 supernova 69 pulsar 69 starburst galaxies 68 supernova explosion 68 supernova remnant 68 nebula 68 globular cluster 68 accretion disk 67 distant galaxy 67 AGNs 67 protostar 67 spiral galaxy 67 active galactic nuclei 67 GRBs 67 Eta Carinae 67 brown dwarf 66 galaxy NGC 66 Milky Way galaxy 66 globular clusters 66 GRB #B 66 supernova explosions 66 redshift 66 WASP #b 66 Orion Nebula 66 brown dwarfs 66 red supergiant 66 distant quasar 66 starburst galaxy 66 HD #b [002] 66 SN #gy 66 gamma ray bursts 65 Milky Way 65 elliptical galaxies 65 HD#b 65 GRB # 65 neutron stars 65 gamma rays 65 merging galaxies 65 planetary nebula 65 pulsars 65 galaxy 65 Andromeda galaxy 65 dwarf galaxies 64 supernovas 64 distant quasars 64 X ray emitting 64 gravitational waves 64 microquasar 64 gravitational radiation 64 Type Ia supernovae 64 blazar 63 planetary nebulae 63 XMM Newton 63 astronomers 63 protoplanetary disk 63 Andromeda Galaxy 63 Virgo Cluster 63 interstellar medium 63 supergiant star 63 neutrino 63 planet orbiting 63 circumstellar disk 63 X ray binary 63 extrasolar planets 63 planet HD #b 63 interacting galaxies 63 Milky Way Galaxy 63 gamma ray emission 62 millisecond pulsars 62 Crab Nebula 62 supernova remnants 62 galaxy M# [002] 62 planet orbits 62 solar corona 62 Fomalhaut b 62 blue supergiant 62 constellation Cassiopeia 62 exoplanet 62 Hanny Voorwerp 62 Wolf Rayet star 62 planets orbiting 62 giant elliptical galaxy 62 infall 62 colliding galaxies 62 gaseous planet 62 blazars 62 Large Magellanic Cloud 62 X ray wavelengths 62 X ray Observatory 62 gravitationally bound 62 ionized gas 62 Red Rectangle 62 luminous galaxies 62 Type Ia supernova 62 exoplanets 61 RS Ophiuchi 61 type Ia supernovae 61 gravitational lensing 61 cosmic ray 61 magnetars 61 rocky planets 61 eclipsing binary 61 foreground galaxy 61 millisecond pulsar 61 spiral galaxy NGC 61 cosmic rays 61 transiting planets 61 interstellar clouds 61 sodium atoms 61 protostars 61 Beta Pictoris 61 Epsilon Eridani 61 constellation Sagittarius 61 GJ #b [001] 61 extragalactic 61 nebulae 61 Virgo cluster 61 neutrinos 61 Lyman alpha 61 Omega Centauri 61 galactic disk 61 cosmic microwave background 61 AU Mic 60 solar nebula 60 Hawking radiation 60 transiting planet 60 auroral 60 magnetic reconnection 60 comet 60 supermassive 60 Enceladus 60 Bullet Cluster 60 constellation Centaurus 60 GeV 60 Voorwerp 60 J# +# [002] 60 planets 60 emission nebula 60 extrasolar planet 60 metallicity 60 Gliese #c 60 magnetospheric 60 globulars 60 ejecta 60 comets 60 protoplanet 60 observable universe 60 red supergiants 60 globular star 60 constellation Ursa Major 59 X ray telescopes 59 exoplanet orbiting 59 GJ #b [002] 59 corona 59 active galactic nucleus 59 Coma Cluster 59 relativistic particles 59 hypervelocity stars 59 XTE J# 59 X ray pulses 59 Small Magellanic Cloud 59 lensing galaxy 59 gravitational wave 59 Cepheids 59 hot Jupiters 59 constellation Hercules 59 star Gliese 59 electron neutrinos 59 reionization 59 sunlike star 59 elliptical galaxy NGC 59 accretion disks 59 RS Oph 59 Pegasi 58 GRB# 58 AB Aurigae 58 Geminga 58 ionized hydrogen 58 novae 58 ULIRGs 58 circumstellar disks 58 galactic clusters 58 constellation Virgo 58 Milky Way halo 58 galactic mergers 58 Epsilon Aurigae 58 Wolf Rayet stars 58 photons 58 coronagraph 58 proplyds 58 GRB 58 filamentary structure 58 Betelgeuse 58 Cygnus X 58 comet nucleus 58 Saturn rings 58 cosmological distances 58 type Ia supernova 58 substorm 58 terrestrial planets 58 Comet Holmes 58 TrES 4 58 protoplanetary disks 58 redshifts 58 galaxy formation 58 coronal mass ejection 58 gravitationally 58 VY Canis Majoris 58 nebular 58 exoplanetary 57 distant supernovae 57 X ray binaries 57 exoplanets orbiting 57 TrES 57 constellation Pegasus 57 quark gluon plasma 57 circumstellar 57 stellar nurseries 57 Hubble observations 57 gravitational interactions 57 constellation Lyra 57 WIMPs 57 Active Galactic Nuclei 57 Arches Cluster 57 V# Mon 57 gamma ray 57 constellation Aquarius 57 Fornax cluster 57 gravitational lens 57 Kuiper belt 57 Cancri e 57 Beta Pictoris b 57 radial velocity 57 celestial object 57 gamma ray flares 57 Oort cloud 57 fainter 57 GJ#b 57 NGC# 57 Gamma ray bursts 57 Astronomers 57 GQ Lupi 57 HD# [005] 57 luminosities 57 Antennae Galaxies 57 RHESSI 57 magnetic fields 57 protoplanets 57 afterglows 57 HL Tau 57 astronomical objects 57 intrinsic brightness 57 Bose Einstein condensate 57 extrasolar 57 Corot 7b 57 Fermi telescope 57 moonlets 57 photon 57 superfluid 57 CoRoT 7b 57 planetesimals 57 Kepler #b 57 Upsilon Andromedae 57 infalling 57 infrared wavelengths 57 Type Ia 57 Corot 9b 57 microlensing 56 Kuiper belt object 56 energetic electrons 56 high redshift galaxies 56 gravitational interaction 56 magnetosphere 56 maser emission 56 HD# [002] 56 BP Psc 56 Earthlike planets 56 super Earths 56 Carina Nebula 56 Oort Cloud 56 galactic cosmic rays 56 planets circling 56 Proxima Centauri 56 Type 1a supernovae 56 optical telescopes 56 Saturn magnetosphere 56 galaxy NGC# 56 accreting 56 emits X rays 56 Orion nebula 56 nucleosynthesis 56 HAT P 56 galaxies collide 56 positrons 56 visible wavelengths 56 Earth magnetosphere 56 ultraviolet wavelengths 56 spacetime 56 Kuiper Belt object 56 Supernova #A 56 Triangulum Galaxy 56 Fomalhaut 56 baryonic 56 planets orbits 56 Sedna 56 sunlike stars 56 interstellar dust clouds 56 Trifid Nebula 56 relativistic jets 56 star Fomalhaut 56 J#.# [001] 56 helium nuclei 56 astrophysicists 56 ESA XMM Newton 56 interferometry 56 interstellar dust 56 photosphere 56 SMBH 56 Jupiter moon Io 56 faint galaxies 56 ionised 56 baryon 56 Alfvén waves 56 elongated orbits 56 sun corona 55 proto galaxies 55 spectra 55 P/# A2 55 CMB radiation 55 HM Cancri 55 Bug Nebula 55 Neutron stars 55 moonlet 55 constellation Carina 55 muon neutrinos 55 NASA Chandra 55 supergiant stars 55 optical wavelengths 55 cosmic cannibal 55 Gliese #g 55 Gravitational waves 55 Bok globules 55 PSR J# 55 rubidium atoms 55 excitons 55 Tarantula Nebula 55 SN #C 55 spectroscopic observations 55 RXTE 55 Mpc 55 HII regions 55 planet WASP #b 55 muon 55 astrophysical 55 Magellanic Clouds 55 SN#A 55 redshifted 55 exciton 55 Kuiper belt objects 55 barred spiral galaxy 55 Cat Paw Nebula 55 energetic gamma rays 55 auroras 55 masers 55 coronal mass ejections 55 Evolution Explorer 55 sunspot 55 atoms 55 comet McNaught 55 nuclei 55 SNR #-#.# 55 constellation Taurus 55 moon Enceladus 55 solar flares 55 spherically symmetric 55 gravitational microlensing 55 constellation Andromeda 55 galactic cores 55 GRB #A 55 SDSS II 55 Henize #-# 55 fainter objects 55 supermassive stars 55 supernova SN 55 Galaxy Evolution 55 Zeta Ophiuchi 55 SN #D 55 constellation Cygnus 55 Supernovae 55 WMAP 55 KBOs 54 Higgs particle 54 Spitzer Space Telescope 54 WMAP satellite 54 Hot Jupiters 54 cosmic ray particles 54 CoRoT 54 X ray observatories 54 RX J# 54 Alfven waves 54 luminosity 54 distant galaxy clusters 54 ESO telescope 54 z ~ 54 dynamical 54 Carina constellation 54 Gliese 54 sunspots 54 jovian 54 gravitational 54 celestial objects 54 magnetotail 54 antimatter particles 54 particle acceleration 54 occultations 54 moons orbiting 54 Lagoon Nebula 54 Eagle Nebula 54 reflection nebula 54 rotating neutron stars 54 icy moons 54 planemos 54 SN #E 54 HIP #b 54 gamma ray observatory 54 Sagittarius B2 54 brightest supernova 54 planets orbiting distant 54 giant elliptical galaxies 54 cluster NGC 54 submillimeter 54 polar vortex 54 chondrules 54 habitable planets 54 Type Ia supernovas 54 aurora 54 Gliese #d 54 VHE gamma rays 54 electron 54 constellation Ophiuchus 54 Seyfert galaxies 54 CoRoT #b 54 ultraluminous galaxy 54 G#.# +#.# 54 heliosphere 54 dense neutron stars 54 CMEs 54 UVOT 54 VLTI 53 electron volts 53 infrared radiation 53 star Proxima Centauri 53 exosphere 53 BP Piscium 53 extrasolar planetary systems 53 Cepheid variables 53 galactic bulge 53 Mimas 53 southern constellation Carina 53 COROT 53 orbits 53 TGFs 53 galaxy M# [001] 53 VB #b 53 X ray observatory 53 Komossa 53 starlight 53 spectroscopically 53 ESO VLT 53 electrons 53 galactic nuclei 53 stellar occultation 53 blue straggler 53 suns 53 aurorae 53 GALEX 53 Astrophysical 53 weakly interacting 53 hypernova 53 heliosheath 53 Eridani 53 SUSY 53 magma ocean 53 sterile neutrino 53 meteoroids 53 wavelengths 53 CoRoT satellite 53 Iapetus 53 KH #D 53 Higgs bosons 53 Bose Einstein condensates 53 gravitational lenses 53 supersymmetric particles 53 Keck telescope 53 filamentary structures 53 PSR B# +# 53 HUDF 53 torus 53 CoRoT 9b 53 Magnetars 53 fermion 53 Puppis 53 ringed planet 53 spinning neutron 53 galactic halo 53 Fermi LAT 53 X ray afterglow 53 Comet Hartley 2 53 brightnesses 53 CMB photons 53 vortices 53 gravitationally lensed 53 Einstein theory 53 circumstellar dust 53 silicate dust 53 Comet Hale Bopp 53 SMBHs 53 Crab Pulsar 53 Cosmologists 53 antiparticle 53 exo planets 53 planets moons 53 Cosmic Microwave Background CMB 53 volcanism 53 comets orbiting 53 planet Uranus 52 axion 52 Helix Nebula 52 particles WIMPs 52 hydrogen atoms 52 Kuiper Belt 52 Gamma rays 52 spiral nebulae 52 PKS #-# 52 constellation Puppis 52 Rosette Nebula 52 Trojan asteroids 52 muons 52 binary asteroid 52 ray Space Telescope 52 mantle plumes 52 BLG #Lb 52 star Beta Pictoris 52 general relativity 52 laser pulse 52 Kuiper Belt objects 52 antiprotons 52 boson 52 chromosphere 52 Maunder minimum 52 polarimetry 52 spatial dimensions 52 millimeter wavelength 52 interstellar cloud 52 planets orbiting stars 52 spectroscopic 52 NASA Cassini spacecraft 52 SNe Ia 52 Leonids 52 solitons 52 Astrophysicists 52 subatomic particle 52 Saturn aurora 52 Microlensing 52 W boson 52 Trifid 52 interferometer 52 Orion constellation 52 Saturn moon Enceladus 52 filaments 52 Adam Riess 52 superdense 52 Stephan Quintet 52 high temperature superconductivity 52 constellation Cetus 52 zodiacal light 52 velocity dispersion 52 photoemission 52 arcminutes 52 gamma ray burst GRB 52 collisional 52 Cosmic Microwave Background 52 NGC #A 52 spicules 52 Cepheid variable 52 Keck Interferometer 52 atomic nuclei 52 Galilean moons 52 microlensing events 52 water vapor 52 NICMOS 52 ionised gas 52 gaseous planets 52 helium atom 52 NASA Wilkinson Microwave 52 Gravitational lensing 52 Kuiper Belt Objects 52 rotational axis 52 HD #b [001] 52 Magellanic Stream 52 supernova remnant Cassiopeia 52 subatomic particles 52 occulted 52 supernovae explosions 52 cosmologists 52 helium atoms 52 fermionic 52 UDFy # 52 polaritons 52 planet transits 51 galactic 51 constellation Eridanus 51 constellation Leo 51 asteroids orbiting 51 Anisotropy Probe 51 galactic nucleus 51 particles 51 shorter wavelengths 51 phonons 51 moon Mimas 51 neutralinos 51 supersolid 51 kaons 51 neutral mass spectrometer 51 weak gravitational lensing 51 diffuse aurora 51 Mandushev 51 Saturn auroras 51 attosecond 51 proton proton collisions 51 substorms 51 submillimetre 51 planet Gliese #g 51 interstellar space 51 Pluto Charon 51 #gy 51 ESO PR 51 magnetic flux 51 axions 51 Venusian atmosphere 51 Chi Cygni 51 baryons 51 smallest exoplanet 51 SNe 51 constellation Cepheus 51 V# Sgr 51 photometer 51 OGLE TR 51 SDSS 51 coronal loops 51 Comet Tempel Tuttle 51 Geminids 51 Pieter van Dokkum 51 Upsilon Andromedae b 51 X ray photons 51 asteroids 51 Doradus 51 moon Ganymede 51 lightwaves 51 periodic oscillations 51 bosonic 51 infalling matter 51 SIRTF 51 BLG #L 51 emit X rays 51 Planetary nebulae 51 Comet Hartley 51 coronal loop 51 noctilucent clouds 51 La Silla Chile 51 planet Gliese #c 51 Saturn moons 51 oppositely directed 51 retrograde orbit 51 constellation Vulpecula 51 Toutatis 51 orbiting Chandra 51 constellation Perseus 51 gamma ray bursts GRBs 51 exo planet 51 solar radii 51 Ring Nebula 51 Earths orbiting 51 Wilkinson Microwave Anisotropy Probe 51 CAIs 51 Aurigae 51 moon Io 51 lunar crust 51 Pleiades cluster 51 stellar occultations 51 gravitational attraction 51 supergiant 51 dipole moment 51 pseudogap 51 Schwarzschild radius 51 silicon monoxide 51 antiparticles 51 transiting exoplanet 51 antiproton 51 cosmic ray protons 51 MG J# +# 51 cosmic microwave radiation 51 submillimeter wavelengths 51 VLBA 51 Gliese #e 50 Comet Halley 50 Earthlike 50 unpolarized 50 constellation Libra 50 hypervelocity star 50 Monoceros 50 impactors 50 faraway galaxies 50 Cancri 50 ionosphere 50 Ulysses spacecraft 50 Saturnian moon 50 rotating neutron 50 starbursts 50 YORP effect 50 dense clumps 50 unaided eye 50 dwarf spheroidal galaxies 50 meteoroid 50 Astrophysical Journal 50 gamma ray emitting 50 constellation Monoceros 50 Jupiter magnetosphere 50 Scorpii 50 antineutrinos 50 ESO Very Large Telescope 50 occultation 50 ionized particles 50 anisotropy 50 planetoid 50 gamma rays emitted 50 Cosmic rays 50 sunspot cycle 50 Triangulum 50 Gemini constellation 50 muon neutrino 50 RRATs 50 neutrino particles 50 magnetic polarity 50 quantum particle 50 PZ Tel 50 supersymmetry 50 constellation Draco 50 Gondolo 50 particles emitted 50 IRAS 4B 50 strange quark 50 gamma ray radiation 50 constellation Scorpius 50 Comet #P/Holmes 50 nebulosity 50 OGLE TR #b 50 polar stratospheric 50 protons 50 comet Hale Bopp 50 Trapezium 50 asteroid 50 infalling gas 50 orbital angular momentum 50 maser 50 icy comets 50 submillimeter galaxies 50 XMM Newton satellite 50 deuterium 50 Cassini 50 Epsilon Indi 50 WM Keck Observatory 50 gravity warps 50 constellation Bootes 50 Butterfly Nebula 50 coronal mass ejections CMEs 50 SCP #F# 50 Earth magnetotail 50 glows brightly 50 quasiparticle 50 ROSAT 50 Spectrograph 50 ultracold atoms 50 Voyager spacecraft 50 habitable zones 50 polariton 50 comet Tempel Tuttle 50 Galaxies 50 solar neutrinos 50 VIRTIS 50 electron volt 50 perihelion 50 interferometric 50 superdense neutron star 50 constellation Aries 50 distant supernovas 50 Quadrantid meteor shower 50 Helix nebula 50 x ray beam 50 crystalline silicates 50 eccentric orbits 50 Wolszczan 50 Perseus Cluster 50 transiting exoplanets 50 tau neutrinos 50 electroweak 50 orbiting planets 50 sized planets orbiting 50 Solar System 50 R#a# 50 hydroxyl molecules 50 Veil Nebula 50 intracluster 50 potentially habitable planets 50 SOHO spacecraft 50 Cassiopeia 50 cosmic strings 50 Orionids 50 quantum gravity 50 spectroscopy 50 superluminal 50 Cygni 50 runaway thermonuclear 50 airglow 50 constellation Aquila 50 thermonuclear reactions 50 nucleobases 50 Einstein cosmological constant 50 sterile neutrinos 50 Perseus cluster 50 Gal Yam 50 diffracted 50 branes 50 Comet NEAT 50 gaseous 50 arcseconds 50 lunar craters 50 WHIM 50 photons emitted 50 tau neutrino 50 Mott insulator 50 fermions 50 superfluidity 50 Astrophysical Journal Letters 50 QCLs 50 kpc 49 NEAs 49 Ordovician extinction 49 Crab pulsar 49 asteroid belt 49 optical spectra 49 interferometers 49 SN #cr 49 permanently shadowed craters 49 tidal tails 49 planet TrES 49 Earthlike planet 49 Extrasolar planets 49 electron beams 49 galaxy supermassive black 49 asterism 49 De Pontieu 49 Doppler shifts 49 deuterium atoms 49 Comet Lulin 49 planet HD#b 49 photons particles 49 helium ions 49 comet tail 49 molten rock 49 neutrons 49 SEGUE 49 cosmic phenomena 49 globular cluster M# 49 constellation Orion 49 alpha particles 49 Sgr 49 millimeter wavelengths 49 SNfactory 49 Andromeda Galaxy M# 49 SMM J# 49 Filippenko 49 cometary debris 49 Geminid shower 49 Rydberg atom 49 XMM Newton observations 49 Comet Machholz 49 olivine 49 volcanic moon Io 49 extrasolar planets orbiting 49 ultracold 49 photometry 49 magnetic monopoles 49 Earth ionosphere 49 IceCube 49 hydrogen atom 49 silicates 49 RHIC 49 Swift Tuttle 49 Wolfgang Brandner 49 Extraterrestrial Physics 49 arcsecond 49 meteoritic material 49 silicate crystals 49 binary quasar 49 Uranus 49 ESA Integral 49 Rydberg atoms 49 Cassini flyby 49 geoneutrinos 49 Type 1a supernova 49 electron positron 49 laser pulses 49 Neil Gehrels 49 detect gamma rays 49 HARPS spectrograph attached 49 cometary 49 angular momentum 49 amplitudes 49 periodic dimming 49 cosmological constant 49 asteroidal 49 diffraction pattern 49 Dumbbell Nebula 49 trans Neptunian objects 49 Hale Bopp 49 constellation Coma Berenices 49 ion collisions 49 Gamma ray burst 49 Cassini spacecraft 49 positron 49 fading afterglow 49 spatially resolved 49 Phaethon 49 NASA Fermi Gamma 49 baryonic matter 49 Syrtis Major 49 inhomogeneous 49 primitive meteorites 49 volcanic plumes 49 cometary material 49 extrasolar planet HD #b 49 outer layers 49 HIRES spectrometer 49 Galilean satellites 49 Bose Einstein condensation 49 Galileo spacecraft 49 Mushotzky 49 spacecraft flyby 49 OGLE 49 superclusters 49 phonon 49 extrasolar planetary 49 planetary Transits 49 infrared imager 49 Canes Venatici 49 proto planetary disk 49 molten magma 49 colliding protons 49 cosmic ray collisions 49 IRC +# 49 Planck satellite 49 blackbody 49 PSR J# +# 49 quantum tunneling 49 X ray beams 49 outer planets 49 carbonate minerals 49 IRAS #-# 49 dust enshrouded 49 supercontinent 49 proton collisions 49 infrared telescope 49 absorbs photons 49 heliopause 48 infrared spectra 48 Kashlinsky 48 cosmic gamma rays 48 protoplanetary 48 Beehive Cluster 48 gamma ray photons 48 exosolar planets 48 ultraviolet light