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(Click for frequent words.) 75 X ray emission 74 AGNs 74 quasars 74 blazars 72 accretion disk 71 galaxies 71 active galactic nucleus 71 neutron stars 71 accretion disks 70 merging galaxies 70 supermassive black holes 70 elliptical galaxies 70 GRBs 70 protostars 70 magnetars 70 supermassive 69 supermassive black hole 69 X ray binary 69 planetary nebulae 69 elliptical galaxy 69 galaxy clusters 69 red supergiants 69 X ray wavelengths 69 distant galaxies 69 luminous galaxies 69 supernovae 69 magnetar 68 starburst galaxies 68 starburst galaxy 68 neutron star 68 gravitational radiation 68 protoplanetary disks 68 eclipsing binary 68 X ray binaries 68 globular clusters 68 brown dwarfs 67 blue supergiant 67 distant quasars 67 supernova remnants 67 Gamma ray bursts 67 gravitationally bound 67 globular cluster 67 Type Ia supernovae 67 quasar 67 galactic cores 67 sunlike stars 67 supernova explosions 67 Virgo Cluster 66 dwarf galaxies 66 blazar 66 SN #A 66 dwarf galaxy 66 stellar nurseries 66 gamma ray bursts 66 Neutron stars 66 spiral galaxies 66 Milky Way halo 66 giant elliptical galaxies 66 globulars 66 gamma rays 66 galactic mergers 65 interstellar clouds 65 luminosities 65 galaxy cluster 65 pulsars 65 Kuiper belt objects 65 redshifts 65 supergiant star 65 relativistic particles 65 faint galaxies 65 KBOs 65 Type Ia supernova 65 gamma ray emission 65 Henize #-# 64 Omega Centauri 64 cosmic phenomena 64 galaxy formation 64 Cosmic rays 64 extragalactic 64 exoplanetary 64 AB Aurigae 64 gaseous planets 64 galactic disk 64 proplyds 64 supersymmetric particles 64 relativistic jets 64 X ray telescopes 64 type Ia supernova 64 gamma ray burst 64 protostar 64 Active Galactic Nuclei 64 Magnetars 64 lensing galaxy 64 fainter objects 64 RS Ophiuchi 64 afterglows 64 microquasar 64 hot Jupiters 64 baryonic 64 novae 63 Seyfert galaxies 63 millisecond pulsars 63 supernova explosion 63 supergiant stars 63 galaxy M# [002] 63 Coma Cluster 63 distant supernovae 63 circumstellar disks 63 red supergiant 63 exoplanets orbiting 63 Evolution Explorer 63 galactic halo 63 elliptical galaxy NGC 63 Milky Way Galaxy 63 gravitational lenses 63 photosphere 63 energetic electrons 63 Saturn magnetosphere 63 Fornax cluster 63 neutralinos 63 gravitational lensing 63 planet HD #b 63 Bok globules 63 redshift 63 dwarf spheroidal galaxies 63 X ray Observatory 63 supernovas 62 X ray observatories 62 nebular 62 rotating neutron stars 62 galactic cosmic rays 62 nebulae 62 astrophysical 62 electron neutrinos 62 Gravitational waves 62 SN #gy 62 circumstellar 62 transiting planets 62 colliding galaxies 62 planemos 62 protoplanetary disk 62 gamma ray flares 62 Epsilon Eridani 62 distant galaxy clusters 62 HD#b 62 Wolf Rayet stars 62 magnetic fields 62 galaxy NGC 62 axions 62 interacting galaxies 62 X ray pulses 62 distant quasar 62 distant galaxy 62 Type 1a supernovae 62 WASP #b 62 supernova remnant 62 metallicity 62 gravitational interactions 62 Small Magellanic Cloud 62 HII regions 62 intrinsic brightness 62 baryons 62 extrasolar 62 brown dwarf 62 Supernovae 62 Eta Carinae 62 Milky Way galaxy 62 galaxy 62 galaxy M# [001] 62 cosmological distances 62 optical telescopes 61 Geminga 61 reflection nebula 61 SMBH 61 chondrules 61 filamentary structure 61 astrophysical phenomena 61 infall 61 Upsilon Andromedae 61 Fermi telescope 61 Wolf Rayet star 61 proto galaxies 61 Hanny Voorwerp 61 galaxies collide 61 Cepheids 61 Hawking radiation 61 emit X rays 61 spherically symmetric 61 X ray emitting 61 foreground galaxy 61 J# +# [002] 61 silicon monoxide 61 energetic gamma rays 61 gravitational waves 61 AU Mic 61 millimeter wavelengths 61 HD #b [002] 61 Magellanic Clouds 61 VHE gamma rays 61 galactic nuclei 61 relativistic protons 61 brightnesses 61 type Ia supernovae 61 accreting 61 XMM Newton 61 antineutrinos 61 MG J# +# 61 astrophysical objects 61 Higgs bosons 61 HD# [002] 61 particle acceleration 61 ULIRGs 61 gravitational lens 61 Virgo cluster 60 GALEX 60 galactic clusters 60 globular star 60 Red Rectangle 60 moonlets 60 galactic collisions 60 V# Mon 60 extrasolar planetary systems 60 constellation Carina 60 Orion Nebula 60 dense neutron stars 60 Trifid Nebula 60 millisecond pulsar 60 rocky planets 60 circumstellar disk 60 optical wavelengths 60 constellation Hercules 60 gamma ray observatory 60 supernova 60 Hot Jupiters 60 planets 60 Kuiper Belt objects 60 solar corona 60 HM Cancri 60 XTE J# 60 eccentric orbits 60 Carina constellation 60 planetary nebula 60 spinning neutron stars 60 cosmic ray collisions 60 retrograde orbits 60 spectroscopic observations 60 ionized gas 60 X ray observatory 60 Beta Pictoris b 60 Arches Cluster 60 gravitational interaction 60 magnetospheric 60 gravitational microlensing 60 cosmic ray particles 60 shorter wavelengths 60 nucleosynthesis 60 protoplanetary discs 60 cosmic rays 60 diffuse aurora 60 interstellar medium 60 SN #E 60 hematite mineral 60 SMBHs 60 Type Ia supernovas 60 gravitationally 60 WIMPs 60 planetary nebulas 60 planets orbits 59 ionized gases 59 icy moons 59 ultraviolet wavelengths 59 chemical abundances 59 Andromeda galaxy 59 GRB # 59 interstellar dust 59 NASA Wilkinson Microwave 59 planet orbits 59 retrograde orbit 59 GJ #b [002] 59 galactic bulge 59 fermions 59 baryonic matter 59 Fomalhaut b 59 ionized particles 59 astronomical objects 59 coronal mass ejections 59 GRB #A 59 baryon 59 infalling 59 nebulas 59 energetic cosmic rays 59 Tarantula Nebula 59 TrES 4 59 intracluster 59 habitable zones 59 SN #C 59 NGC# 59 SN #D 59 transiting exoplanets 59 Bug Nebula 59 sodium atoms 59 jovian 59 X ray photons 59 super Earths 59 SN#A 59 circular orbits 59 planets orbiting 59 CAIs 59 microlensing events 59 dense clumps 59 ionized hydrogen 59 sized planets orbiting 59 Epsilon Aurigae 59 emits X rays 59 Astrophysical 59 blue straggler 59 spherical halo 59 gaseous planet 59 Supermassive black 59 extrasolar planets 59 superfluids 59 Milky Way 59 elongated orbits 59 Lyman alpha 59 Coma cluster 59 dust enshrouded 59 weakly interacting 59 Crab Nebula 59 particles WIMPs 59 ejecta 58 auroral 58 giant elliptical galaxy 58 Earthlike planets 58 exoplanet orbiting 58 assumed planets circling 58 Perseus Cluster 58 Kuiper Belt Objects 58 optical spectra 58 Gamma rays 58 submillimeter galaxies 58 CoRoT #b 58 star Gliese 58 faraway galaxies 58 BP Psc 58 Type Ia 58 constellation Ursa Major 58 inhabitable planets 58 VY Canis Majoris 58 RXTE 58 Carina Nebula 58 spiral galaxy 58 astrophysicists 58 hypernova 58 pulsar 58 planetesimals 58 gamma ray photons 58 hypervelocity stars 58 sterile neutrinos 58 GJ #b [001] 58 star Beta Pictoris 58 neutrinos 58 constellation Centaurus 58 terrestrial planets 58 constellation Virgo 58 volcanic moon Io 58 gamma ray bursts GRBs 58 Kuiper belt 58 muon neutrinos 58 transiting planet 58 spiral galaxy NGC 58 astronomers 58 ESA XMM Newton 58 Large Magellanic Cloud 58 X ray afterglow 58 extrasolar planets orbiting 58 Area Telescope LAT 58 spatially resolved 58 emission nebula 58 GRB# 58 moon Io 58 masers 58 Elliptical galaxies 58 oppositely directed 58 Cat Paw Nebula 58 detect gamma rays 58 constellation Cassiopeia 58 nebula 58 GJ#b 58 Dwarf galaxies 58 Antennae Galaxies 58 gravitational wave 58 Alfven waves 58 Bullet Cluster 58 coronal loops 58 solar nebula 58 CoRoT 7b 58 CMB radiation 58 quark gluon plasma 58 visible wavelengths 58 Saturnian moon 58 galaxy redshift 58 exo planets 57 Beta Pictoris 57 Corot 9b 57 HARPS instrument 57 TGFs 57 electron positron pairs 57 stellar seismology 57 interstellar dust clouds 57 helium nuclei 57 electrons protons 57 HL Tau 57 cosmic ray 57 radial velocity 57 PSR J# +# 57 cluster NGC 57 muons 57 high redshift galaxies 57 Galaxy Evolution 57 Cancri e 57 elliptical orbits 57 filamentary 57 earthshine 57 hadron 57 kaons 57 silicate dust 57 antiparticles 57 colloidal crystals 57 aurorae 57 superdense 57 spiral nebulae 57 TrES 57 barred spiral galaxy 57 PSR J# 57 neutralino 57 gravitational tides 57 RS Oph 57 bosonic 57 starbursts 57 ultraviolet radiation emitted 57 Triangulum Galaxy 57 Zeta Ophiuchi 57 phonons 57 antimatter particles 57 Anisotropy Probe WMAP 57 Sagittarius B2 57 Lagoon Nebula 57 XMM Newton observations 57 backscattered 57 planets moons 57 exosphere 57 BLG #Lb 57 protoplanet 57 nuclei 57 planets orbiting distant 57 Orion nebula 57 strangelets 57 impactors 57 gravitationally lensed 57 NASA Chandra 57 dynamical evolution 57 Hubble observations 57 highly elliptical orbits 57 ray Space Telescope 57 planetary orbits 57 gamma ray 57 tau neutrinos 57 positrons 57 radial velocity method 57 submillimetre 57 gamma rays emitted 57 coronal holes 57 nucleon 57 helium atoms 57 planet orbiting 57 supermassive stars 57 Trapezium 57 exoplanet 57 noctilucent clouds 57 inhomogeneous 57 infrared wavelengths 57 sterile neutrino 56 ESO VLT 56 habitable planets 56 nebulosity 56 interstellar cloud 56 redshifted 56 occultations 56 orbiting Chandra 56 radial velocity technique 56 cosmological theories 56 Globular clusters 56 distant supernovas 56 Galactic cosmic rays 56 atomic nuclei 56 auroral displays 56 constellation Taurus 56 PKS #-# 56 protoplanetary 56 gravitational tugs 56 GRB #B 56 electrons orbiting 56 spacetime 56 BP Piscium 56 submillimeter 56 GRB 56 gravitational redshift 56 Spitzer Space Telescope 56 SDSS II 56 Wilkinson Microwave Anisotropy Probe 56 constellation Vulpecula 56 RRATs 56 highly magnetized neutron 56 proto cluster 56 coronal loop 56 Bose Einstein condensates 56 Extrasolar planets 56 polaritons 56 magnetosphere 56 rotating neutron 56 GeV 56 solar flares 56 W boson 56 excitons 56 sunlike star 56 Cepheid variables 56 spheroidal 56 CoRoT 9b 56 X ray spectra 56 spinning neutron 56 meteoroids 56 interferometry 56 comets orbiting 56 starquakes 56 weak gravitational lensing 56 cosmic microwave radiation 56 coronal mass ejections CMEs 56 planets circling 56 W bosons 56 supernovae explosions 56 star Fomalhaut 56 GQ Lupi 56 CoRoT satellite 56 VB #b 56 DEEP2 56 singularities 56 reionization 56 eclipsing binaries 56 Galilean moons 56 planets orbiting sun 56 carbonaceous chondrites 56 Oort Cloud 56 electroweak 56 constellation Aquarius 56 magnetic reconnection 56 Komossa 56 UDFy # 56 binary quasar 56 particle detectors 56 ultracold atoms 56 gravity warps 56 exoplanets 56 highly collimated 56 cosmic microwave background 56 ULP cepheids 56 constellation Eridanus 56 Doppler shifts 56 orbits 56 orbiting planets 56 stellar occultations 56 De Pontieu 56 OGLE TR #b 56 gravitational perturbations 56 collimated 56 muon neutrino 56 tholins 56 Adam Riess 56 carbonate minerals 56 Solar flares 56 quantum mechanically 56 Keck telescope 56 superfluid 56 cosmic cannibal 56 collisional 56 interferometers 56 ionised gas 56 Comet Holmes 56 Stephan Quintet 56 primitive meteorites 56 fermion 55 planet Gliese #c 55 particles emitted 55 occulted 55 subatomic particles 55 Saturn aurora 55 Mpc 55 Mauna Kea Hawaii 55 Anisotropy Probe 55 electron neutrino 55 CMEs 55 Venusian atmosphere 55 Kuiper Belt Object 55 RHESSI 55 meteoritic material 55 Jupiter Saturn Uranus 55 X ray spectrometer 55 G#.# +#.# 55 galaxies nebulae 55 Io Europa 55 Rosette Nebula 55 celestial objects 55 Keck Interferometer 55 polar mesospheric clouds 55 Kuiper belt object 55 antiparticle 55 planet WASP #b 55 celestial phenomena 55 planetary Transits 55 Comet Tempel Tuttle 55 planets comets 55 spectroscopically 55 planets orbiting stars 55 excitations 55 chromosphere 55 earthlike planets 55 photometry 55 Gliese #d 55 Earths orbiting 55 spectral fingerprints 55 ROSAT 55 moons orbiting 55 globular cluster M# 55 Earthlike 55 B mesons 55 substorms 55 Earth magnetosphere 55 non baryonic 55 heliospheric 55 PSR B# +# 55 photons 55 moon Ganymede 55 RX J# 55 polarimetry 55 Andromeda halo 55 mu Arae 55 Orion constellation 55 comets 55 HIRES spectrometer 55 KH #D 55 Voorwerp 55 CMB photons 55 SNR #-#.# 55 dipole moment 55 spectra 55 Richard Mushotzky 55 electrons positrons 55 Weakly Interacting Massive Particles 55 constellation Sagittarius 55 photons emitted 55 Astrophysicists 55 asteroids comets 55 observable universe 55 constellation Cetus 55 RY Sagittarii 55 multiband imaging photometer 55 cosmological parameters 55 substorm 55 cosmic ray protons 55 magnetospheres 55 AGN 55 lunar crust 55 galaxy NGC# 55 comet nucleus 55 Alfvén waves 55 dusty disks 55 hydrogen nuclei 54 Jupiter moon Io 54 planets asteroids 54 Gravitational lensing 54 spectroscopic 54 infalling gas 54 chondrites 54 Type 1a supernova 54 Trifid 54 microlensing 54 Muons 54 Pulsars 54 supernova SN 54 Type Ic supernova 54 icy comets 54 Microlensing 54 Trojan asteroids 54 lithium atoms 54 mantle plumes 54 Corot 7b 54 Gliese #c 54 protoplanets 54 Spitzer infrared spectrograph 54 unpolarized 54 rubidium atoms 54 Crab pulsar 54 solitons 54 spectroscopic measurements 54 Helix Nebula 54 silicates 54 Andromeda Galaxy 54 periodic dimming 54 P/# A2 54 giant gaseous planets 54 Bose Einstein condensate 54 Wolfgang Brandner 54 antiprotons 54 fading afterglow 54 ultraviolet photons 54 nucleons 54 rotational axis 54 synchrotron x ray 54 hydrogen helium 54 surface plasmons 54 Eagle Nebula 54 bolometers 54 sparticles 54 unaided eye 54 circumstellar dust 54 Mushotzky 54 Doradus 54 coronagraph 54 Gal Yam 54 olivine 54 HAT P 54 infalling matter 54 gravitons 54 XMM Newton satellite 54 magma ocean 54 quanta 54 hadrons 54 gamma ray emitting 54 Astrophysics Cambridge Mass. 54 YORP effect 54 VISTA telescope 54 Nikku Madhusudhan 54 zodiacal dust 54 magnetic monopoles 54 Supernova #A 54 R Coronae Borealis 54 Wolszczan 54 ion collisions 54 Hipparcos 54 comets asteroids 54 tidally 54 Infrared Thermal Imaging Spectrometer 54 haloes 54 thermonuclear reactions 54 constellation Pegasus 54 constellation Aquila 54 trans Neptunian objects 54 pyroxene 54 mesosphere 54 dynamical 54 prograde 54 crystalline silicates 54 Pluto Charon 54 ultraluminous X ray 54 submillimeter wavelengths 54 velocity dispersion 54 helium ions 54 infrared photons 54 Chandra X ray 54 proto planetary disks 54 lightwaves 54 planetary embryos 54 #gy 54 Butterfly Nebula 54 magnetic substorms 54 Earth ionosphere 54 x ray beam 54 NGC #A 54 galaxies quasars 54 cometary material 54 massless particles 54 planet Gliese #g 54 Rayleigh scattering 54 detect gravitational waves 54 gamma ray flashes 54 axion 54 Noctilucent clouds 54 Kepler #b 54 atoms 54 neutrons 54 neutrino 54 phyllosilicates 53 gravitational pulls 53 particle accelerators 53 photons particles 53 Crab Pulsar 53 photon energies 53 Delta Cephei 53 Tarantula nebula 53 electron positron 53 Spectrograph 53 Cygnus Lyra region 53 Cosmic Microwave Background CMB 53 SNe 53 moonlet 53 outer planets 53 Gliese #e 53 gravitational 53 Upsilon Andromedae b 53 constellation Lyra 53 ultracold 53 multiwavelength 53 gravitational attraction 53 Kuiper Belt object 53 Cosmic Microwave Background 53 interstellar dust grains 53 silicate mantle 53 Veil Nebula 53 IRAS #-# 53 solar flares coronal 53 solar neutrinos 53 planet magnetosphere 53 ultradense 53 IRAS 4B 53 Cepheid variable 53 zodiacal light 53 NASA Fermi Gamma 53 SUSY 53 VLTI 53 sun corona 53 IR wavelengths 53 extrasolar planetary 53 magnetotail 53 SCP #F# 53 electron density 53 brightest supernova 53 Rydberg atom 53 moon Mimas 53 Cygnus X 53 supernovae explode 53 elongated orbit 53 binary asteroid 53 baryon acoustic oscillations 53 spiral galaxy M# 53 Saturn auroras 53 Saturn outermost ring 53 ESO PR 53 lepton 53 mineral olivine 53 mesons 53 outer corona 53 torus 53 Gamma ray burst 53 bosons 53 magnetic excitations 53 neutrino particles 53 Sagittarius dwarf galaxy 53 TW Hydrae 53 Dauphas 53 ARPES 53 Higgs particle 53 cosmic gamma rays 53 coronal heating 53 smallest exoplanet 53 exosolar planets 53 WM Keck Observatory 53 nebula NGC 53 aerosol particles 53 SINFONI 53 Saturn outermost 53 moonquakes 53 diffract 53 constellation Leo 53 galactic nucleus 53 starlike 53 synchrotrons 53 transiting exoplanet 53 planetary magnetospheres 53 COROT 53 Infrared Array Camera 53 spherical particles 53 Cancri 53 molten magma 53 moons circling 53 constellation Cygnus 53 cosmological 53 permanently shadowed craters 53 pions 53 basaltic rocks 53 Earthlike planet 53 potentially habitable planets 53 Samuel Oschin Telescope 53 SEGUE 53 HESS telescopes 53 airglow 53 infrared spectra 53 Spiral galaxies 53 cosmologists 53 electron beams 53 Schwarzschild radius 53 tidal tails 53 electrons 53 Monoceros 53 Proxima Centauri 53 asteroidal 53 orbital angular momentum 53 Jupiter Saturn 53 SMM J# 53 alpha particles 53 GZK cutoff 53 glows brightly 53 interferometric 53 x ray beams 53 stony meteorites 53 macroscopic objects 52 superclusters 52 WMAP 52 anisotropy 52 gamma ray telescopes 52 TNOs 52 attosecond pulses 52 Puppis 52 Triangulum 52 filamentary structures 52 proton collisions 52 dirty snowballs 52 planets Uranus 52 Ulysses spacecraft 52 Pleiades cluster 52 Ring Nebula 52 olivine mineral 52 HD# [005] 52 maser emission 52 cosmic strings 52 constellation Libra 52 ESA Integral 52 HiRISE image 52 SNe Ia 52 galactic cosmic ray 52 Peony nebula star 52 ionise 52 extrasolar planet 52 Paranal Chile 52 exo planet 52 carbonate globules 52 cosmic particles 52 BECs 52 Galilean satellites 52 radiative cooling 52 orbiting gamma ray 52 HARPS spectrograph attached 52 quasiparticle 52 Keck Telescope 52 orbital resonance 52 spectroscope 52 binary asteroids 52 VLBA observations 52 exoplanetary systems 52 proton proton collisions 52 gluon 52 circularly polarized light 52 auroras 52 antiproton 52 Fermi LAT 52 Jovian moons 52 SN #ha 52 magnetic anisotropy 52 supersymmetric 52 diffraction patterns 52 infrared telescopes 52 planetary transits 52 Circinus X 1 52 Pegasi 52 Astrological lore 52 Wilkinson Microwave Probe 52 electron electron 52 photoluminescence 52 van Arkel discovery 52 Cosmic Evolution 52 osmium 52 spectral fingerprint 52 hydrated minerals 52 celestial object 52 astrometry 52 Filippenko 52 presolar grains 52 noctilucent 52 blackbody 52 THEMIS satellites 52 Mercury exosphere 52 neutrino mass 52 planets atmospheres 52 Fermi Gamma ray 52 diffraction pattern 52 UVOT 52 heavily cratered 52 Comet Elenin 52 Cassini ion 52 southern constellation Carina 52 luminosity