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(Click for frequent words.) 77 cosmic rays 71 Gamma rays 69 neutrinos 68 X ray emission 67 gamma ray 67 gamma ray burst 66 gamma ray bursts 66 active galactic nuclei 66 gamma ray emission 66 distant galaxies 65 photons 65 quasar 65 cosmic ray 65 energetic electrons 65 galactic cosmic rays 64 gravitational waves 64 alpha particles 64 galaxies 64 neutron star 64 quasars 64 supernovae 64 cosmic ray particles 64 positrons 64 solar flares 64 supermassive black hole 64 gamma rays emitted 64 gravitational radiation 63 Cosmic rays 63 neutrino 63 gamma radiation 63 AGNs 63 supernova explosions 62 gamma ray flares 62 neutrons 62 coronal mass ejections 62 energetic gamma rays 62 magnetar 62 blazar 62 GRBs 62 X ray pulses 62 supernova 62 infrared radiation 62 VHE gamma rays 61 magnetic fields 61 Gamma ray bursts 61 muons 61 accretion disks 61 elliptical galaxies 61 accretion disk 61 afterglows 61 X ray photons 61 CMEs 61 solar corona 61 ionized gas 61 neutron stars 61 laser pulses 61 subatomic particles 60 atomic particles 60 photon 60 electron beams 60 electron neutrinos 60 X ray wavelengths 60 interstellar clouds 60 axions 60 wavelengths 60 type Ia supernova 60 protons 60 particles 60 blazars 60 GRB# 60 muon 60 ionised 59 distant galaxy 59 ejecta 59 Eta Carinae 59 interstellar medium 59 electrons protons 59 electrons 59 diffract 59 helium nuclei 59 X ray beams 59 galaxy clusters 59 antimatter particles 59 supernova explosion 59 galaxy 59 neutralinos 59 HD#b 59 starburst galaxies 59 protoplanetary disk 59 Gravitational waves 59 pulsar 58 infalling 58 GRB # 58 meteoroids 58 supernovas 58 millimeter wavelength 58 antiparticles 58 Geminga 58 visible wavelengths 58 Lyman alpha 58 coronal mass ejections CMEs 58 distant quasars 58 laser pulse 58 HD #b [002] 58 RS Ophiuchi 58 coronal mass ejection 58 supernova remnant 58 terahertz waves 58 cosmic gamma rays 58 optical wavelengths 58 comets 58 ultraviolet wavelengths 58 nebula 58 comet 58 shorter wavelengths 58 supermassive black holes 58 Saturn magnetosphere 58 microquasar 58 Type Ia supernovae 58 detect gamma rays 58 distant supernovae 58 protostar 58 comet nucleus 58 Hawking radiation 58 Cherenkov radiation 58 AB Aurigae 58 gamma ray photons 58 brown dwarfs 58 millisecond pulsar 58 emit X rays 58 electromagnetic waves 57 Orion Nebula 57 Crab Nebula 57 SN #gy 57 particle beam 57 Supernovae 57 relativistic particles 57 helium atoms 57 GRB #B 57 gamma ray radiation 57 SN #A 57 cosmic radiation 57 Hanny Voorwerp 57 ultraviolet light 57 nebulae 57 magnetic reconnection 57 XMM Newton 57 particle acceleration 57 spiral galaxies 57 sodium atoms 57 TGFs 57 X ray telescopes 57 intrinsic brightness 57 active galactic nucleus 57 magnetars 57 dwarf galaxies 57 starburst galaxy 57 proton collisions 57 interstellar dust 57 cosmic microwave background 57 particles WIMPs 57 quark gluon plasma 57 atomic nuclei 57 WIMPs 57 pions 57 neutron radiation 57 corona 56 Type Ia supernova 56 galactic disk 56 redshift 56 particle beams 56 circumstellar 56 antiparticle 56 Carina constellation 56 muon neutrinos 56 supergiant star 56 microwave radiation 56 galaxy cluster 56 exoplanet orbiting 56 photosphere 56 ultraviolet radiation 56 ionized particles 56 electromagnetic radiation 56 gravitational wave 56 ionize 56 RHESSI 56 fainter objects 56 distant quasar 56 nebular 56 infrared wavelengths 56 GeV 56 gravitons 56 Supernova #A 56 novae 56 tau neutrinos 56 cosmic ray protons 56 X ray binary 56 x ray beam 56 elliptical galaxy 56 colliding protons 56 pulsars 56 magnetosphere 56 supermassive 56 infall 56 asteroids 56 merging galaxies 56 protoplanetary disks 55 solar nebula 55 Neutron stars 55 particle 55 red supergiant 55 gravitational interactions 55 gravitational lensing 55 atoms 55 antimatter 55 X ray binaries 55 CMB photons 55 type Ia supernovae 55 exoplanets orbiting 55 silicon monoxide 55 GRB 55 Fermi telescope 55 gamma ray bursts GRBs 55 Gamma ray 55 MeV 55 colliding galaxies 55 metallicity 55 cosmological distances 55 luminous galaxies 55 Milky Way Galaxy 55 infrared photons 55 stellar nurseries 55 Wolf Rayet star 55 Antennae Galaxies 55 supernova remnants 55 THz radiation 55 photons emitted 55 gamma ray observatory 55 auroral 55 infrared ultraviolet 55 V# Mon 55 W boson 55 antiprotons 55 substorm 55 magnetospheric 55 hydrogen nuclei 55 ionized 55 planetary nebulae 55 subatomic 55 extrasolar 55 Fermi LAT 55 Type Ia supernovas 55 millisecond pulsars 55 water vapor 55 HM Cancri 55 detect gravitational waves 54 backscattered 54 neutrino particles 54 kaons 54 foreground galaxy 54 antineutrinos 54 gravitational lens 54 cosmic ray collisions 54 emits X rays 54 interstellar dust clouds 54 excitons 54 alpha particle 54 dwarf galaxy 54 proton proton collisions 54 submillimeter 54 subatomic particle 54 WASP #b 54 meteoroid 54 GALEX 54 energetic cosmic rays 54 transiting planets 54 globular cluster 54 astrophysicists 54 ionosphere 54 Higgs bosons 54 lensing galaxy 54 Solar flares 54 gravitationally bound 54 Andromeda galaxy 54 photon energies 54 RS Oph 54 X ray beam 54 galactic halo 54 brightnesses 54 exosphere 54 icy comets 54 baryon 54 gravitationally 54 electron 54 supersymmetric particles 54 Cassini ion 54 X ray emitting 54 ionizing 54 antiproton 54 Arches Cluster 54 red supergiants 54 astrophysical 54 Virgo Cluster 54 redshifts 54 blue supergiant 54 optical telescopes 54 hadrons 54 cosmic particles 54 Milky Way 54 Photons 54 keV 54 photon beam 54 Cosmic Microwave Background CMB 54 planet HD #b 54 laser beams 54 planetesimals 53 femtosecond timescale 53 Milky Way galaxy 53 X ray spectrometer 53 interstellar space 53 surface plasmons 53 Bullet Cluster 53 hydrogen atoms 53 photons particles 53 orbiting planets 53 Bok globules 53 spectroscopic 53 Magnetars 53 Henize #-# 53 Fomalhaut b 53 relativistic protons 53 impactors 53 Alfvén waves 53 RXTE 53 galaxies collide 53 galactic mergers 53 Neutrinos 53 photochemical reactions 53 CMB radiation 53 ionized gases 53 coronal loops 53 silicate dust 53 Evolution Explorer 53 Galactic cosmic rays 53 SN #E 53 comet Tempel Tuttle 53 ionised gas 53 SN #D 53 substorms 53 faraway galaxies 53 ionise 53 solar neutrinos 53 runaway thermonuclear 53 electron positron 53 fading afterglow 53 galaxy M# [002] 53 maser emission 53 exoplanets 53 distant supernovas 53 W bosons 53 constellation Aquarius 53 Saturnian moon 53 radiation 53 Laser beams 53 Corot 9b 53 VY Canis Majoris 53 planetary nebula 53 dense neutron stars 53 globular clusters 53 Andromeda Galaxy 53 helium ions 53 attosecond 53 Earth magnetosphere 53 particles emitted 53 Epsilon Eridani 53 Oort Cloud 53 emits gamma rays 53 Earth ionosphere 53 emit gamma rays 53 nuclei 53 B mesons 53 ROSAT 53 highly elliptical orbits 53 relativistic jets 53 astronomers 53 muon neutrino 53 Muons 53 coronal holes 53 nucleosynthesis 53 spiral galaxy 53 electron volts 53 brown dwarf 53 BP Psc 53 lightwaves 53 radioactive decay 52 galactic cosmic ray 52 luminosities 52 protostars 52 Galaxy Evolution 52 Orionids 52 Bose Einstein condensate 52 globulars 52 high redshift galaxies 52 Burst Alert 52 gaseous 52 proto galaxies 52 Type 1a supernova 52 protons collide 52 ions 52 spectral measurements 52 spacetime 52 Beta Pictoris b 52 redshifted 52 evanescent waves 52 proton 52 eclipsing binary 52 auroras 52 inhomogeneous 52 X ray afterglow 52 extragalactic 52 spherically symmetric 52 X rays gamma rays 52 Red Rectangle 52 oppositely directed 52 MG J# +# 52 Neil Gehrels 52 Active Galactic Nuclei 52 jovian 52 Type Ia 52 ionizing radiation 52 ionizes 52 proton particles 52 hypernova 52 HD# [002] 52 terahertz rays 52 heliosphere 52 faint galaxies 52 exoplanetary 52 Alfven waves 52 deuterium atoms 52 spatially resolved 52 ultraviolet photons 52 retrograde orbit 52 Mandushev 52 Raman scattering 52 diffracted 52 infrared spectrometers 52 x ray beams 52 Higgs particle 52 laser beam 52 constellation Hercules 52 HESS telescopes 52 neutron beams 52 galactic clusters 52 astrophysical phenomena 52 elongated orbits 52 coronagraph 52 inner Oort Cloud 52 noctilucent clouds 52 luminosity 52 Saturn rings 52 primitive meteorites 52 magnetotail 52 starquakes 52 sterile neutrino 52 Cat Paw Nebula 52 astronomical objects 52 tholins 52 Proxima Centauri 52 gamma ray detectors 52 ULIRGs 52 strangelets 52 ion collisions 52 GJ #b [002] 51 Type 1a supernovae 51 observable universe 51 cometary debris 51 J# +# [002] 51 planets orbits 51 proton proton 51 gamma ray photon 51 planets orbiting distant 51 sunlike stars 51 constellation Ursa Major 51 rotating neutron stars 51 HL Tau 51 elliptical galaxy NGC 51 gaseous planet 51 GJ #b [001] 51 helium atom 51 positron 51 circularly polarized light 51 Epsilon Aurigae 51 neutron beam 51 proplyds 51 circumstellar disk 51 XTE J# 51 gravity warps 51 supergiant stars 51 orbiting Chandra 51 Saturn auroras 51 cometary dust 51 baryons 51 galaxy formation 51 spectral fingerprints 51 spectrographs 51 X ray spectroscopy 51 gamma ray flashes 51 photometer 51 planets 51 planet orbiting 51 gravitational 51 comet tail 51 moon Io 51 distant galaxy clusters 51 X ray Observatory 51 Comet 9P/Tempel 1 51 planet magnetosphere 51 Jupiter magnetosphere 51 electron volts eV 51 X ray observatories 51 electron beam 51 electron positron pairs 51 diffraction patterns 51 constellation Cassiopeia 51 outer planets 51 transiting planet 51 Earthlike planet 51 X ray observatory 51 comets asteroids 51 masers 51 Upsilon Andromedae 51 geoneutrinos 51 protoplanet 51 Cancri e 51 proton antiproton 51 solitons 51 hydroxyl molecules 51 spectra 51 cometary material 51 chondrules 51 HII regions 51 electrons positrons 51 hadron 51 Venusian atmosphere 51 constellation Virgo 51 KBOs 51 interstellar particles 51 occultations 51 solar prominences 51 radiation emitted 51 neutron 51 crystalline silicates 51 SUSY 51 ionization 51 transiting exoplanets 51 krypton 51 reflection nebula 50 CoRoT 9b 50 constellation Perseus 50 Voorwerp 50 ionized hydrogen 50 terahertz radiation 50 GRB #A 50 dwarf spheroidal galaxies 50 synchrotron emission 50 radiations 50 supernovae explosions 50 astrophysical objects 50 femtosecond pulses 50 frequency electromagnetic waves 50 particle accelerators 50 planets circling 50 asteroids comets 50 Comet Holmes 50 ESA XMM Newton 50 Nasa spacecraft 50 reionization 50 UV photons 50 meteors 50 aerosol particles 50 VLTI 50 emitted 50 particle detectors 50 UVOT 50 ray Space Telescope 50 Astrophysicists 50 Cosmic Microwave Background 50 planet WASP #b 50 Distant galaxies 50 accreting 50 Cepheids 50 cosmic phenomena 50 diffraction pattern 50 plasmons 50 gamma rays X rays 50 interstellar dust grains 50 transiting exoplanet 50 brightest supernova 50 gravitational microlensing 50 Kuiper belt object 50 gamma ray energies 50 axion 50 Ultraviolet light 50 ultraviolet 50 heliospheric 50 rubidium vapor 50 exo planets 50 radiative 50 galactic 50 Doppler shifts 50 superdense 50 sulfate aerosols 50 infalling matter 50 Coma Cluster 50 gravitational tides 50 exoplanet 50 Gliese #c 50 Fermi Gamma ray 50 spectroscopic measurements 50 strangelet 50 massless particles 50 galaxy NGC 50 galactic bulge 50 thermonuclear reactions 50 gravitational interaction 50 bolometers 50 NASA Far Ultraviolet 50 filamentary structure 50 ultraluminous galaxy 50 Betelgeuse 50 antihydrogen 50 cosmic dust 50 elliptical orbits 50 extrasolar planet 50 extrasolar planets 50 infrared rays 50 barred spiral galaxy 50 geomagnetic storms 50 electronvolts 50 interferometry 50 magnetic flux 50 Ulysses spacecraft 50 excitations 50 radial velocity 50 noble gases 50 weak gravitational lensing 50 particle colliders 50 celestial object 50 ESA Integral 50 quantum mechanically 50 proton antiproton collisions 50 Weakly Interacting Massive Particles 50 diffuse aurora 50 gravitational lenses 50 Halley comet 50 weakly interacting 50 cosmic microwave radiation 50 Milky Way halo 50 GJ#b 50 sonoluminescence 50 ion beam 50 electrons emitted 50 GQ Lupi 50 electromagnetic 50 gravitational redshift 50 Comet Tempel Tuttle 50 ENAs 50 sun corona 50 neutralino 50 Gamma ray bursts GRBs 50 constellation Centaurus 50 krypton gas 50 aurorae 50 strange quark 50 X ray spectra 50 spinning neutron stars 50 millimeter wavelengths 50 rocky planets 50 Bose Einstein Condensate 50 ESO VLT 50 stellar occultations 50 Telescope BAT 50 Astrophysical 50 fainter 50 Kuiper belt objects 49 Gemini constellation 49 airglow 49 interferometers 49 COROT 49 R Coronae Borealis 49 baryonic 49 Upsilon Andromedae b 49 Rosette Nebula 49 uncharged particles 49 Quadrantid 49 ionized atoms 49 ultraviolet radiation emitted 49 mesosphere 49 polaritons 49 infra red radiation 49 nucleon 49 antihelium 4 49 Comet Lulin 49 atomic nucleus 49 outer layers 49 meteoritic material 49 Mercury magnetosphere 49 SN #ha 49 emission nebula 49 Kuiper belt 49 planet transits 49 Microlensing 49 planetary Transits 49 Small Magellanic Cloud 49 interstellar 49 phonon 49 spherical particles 49 corona discharge 49 UDFy # 49 moonlets 49 galactic cores 49 comets orbiting 49 bosonic 49 rubidium atoms 49 chromosphere 49 Heliospheric Observatory SOHO 49 suns 49 cosmic neutrinos 49 SNe 49 Planck telescope 49 gluon 49 Gal Yam 49 baryonic matter 49 stimulated emission 49 hypervelocity stars 49 sterile neutrinos 49 volcanic plumes 49 Gravitational lensing 49 hot Jupiters 49 protoplanets 49 periodic dimming 49 CoRoT satellite 49 comet Hale Bopp 49 nanobubbles 49 asteroid 49 spectroscopic analysis 49 planemos 49 Triangulum Galaxy 49 optical spectra 49 oxygen ions 49 XMM Newton satellite 49 spectroscopically 49 gamma ray telescope 49 diffraction 49 electromagnetic radiations 49 Corot 7b 49 magnetic monopoles 49 quasiparticle 49 WMAP satellite 49 constellation Carina 49 Magnetic Imager HMI 49 orbiting gamma ray 49 STEREO spacecraft 49 Hot Jupiters 49 NASA Wilkinson Microwave 49 antineutrino 49 undiscovered particle 49 stellar occultation 49 Higgs Boson particle 49 fermions 49 Ring Nebula 49 particle accelerator 49 IR wavelengths 49 Rydberg atom 49 Pluto Charon 49 eccentric orbits 49 imaging spectrometer 49 planets moons 49 Crab Pulsar 49 Cygnus X 49 spiral galaxy NGC 49 BP Piscium 49 Bug Nebula 49 cometary 49 Planck satellite 49 UV light 49 Adam Riess 49 auroral displays 49 IRAS #-# 49 superluminal 49 neutron spectrometer 49 infalling gas 49 icy moons 49 polarimetry 49 Einstein equations 49 RRATs 49 picosecond 49 cosmic 49 quantum particles 49 neutral mass spectrometer 49 Tarantula Nebula 49 Enceladus 49 radiofrequency waves 49 velocities 49 electron bunches 49 ion beams 49 pulsed laser 49 infrared wavelength 49 absorption spectroscopy 49 Orionid 49 sulphate particles 49 CAIs 49 extrasolar planetary systems 49 sunlike star 49 Coronal mass 49 submillimeter wavelengths 49 microlensing events 49 spherical halo 48 scintillator 48 hydrogen atom 48 electromagnetic flux 48 heliosheath 48 attosecond pulses 48 orbits 48 Super Kamiokande 48 planets orbiting 48 asteroidal 48 electron neutrino 48 quarks 48 aerosols 48 spectroscopic observations 48 Saturn aurora 48 CERN LHC 48 gamma ray telescopes 48 Bose Einstein condensates 48 binary asteroid 48 emit photon 48 gamma ray emitting 48 sparticles 48 Stephan Quintet 48 circular orbits 48 SCP #F# 48 Earthlike planets 48 rays 48 ultra violet radiation 48 dust particles 48 terrestrial planets 48 Ultraviolet radiation 48 surface plasmon 48 Large Magellanic Cloud 48 moon Mimas 48 Brookhaven Relativistic Heavy 48 photoelectron 48 plasmasphere 48 rotating neutron 48 martian atmosphere 48 fission reactions 48 polariton 48 spicules 48 quantum particle 48 Spitzer infrared spectrograph 48 constellation Gemini 48 Leonids 48 nuclides 48 antiquarks 48 spectral signature 48 cosmic cannibal 48 blue straggler 48 Ionizing radiation 48 NEAs 48 supermassive stars 48 pyroclastic flow 48 bosons 48 exciton 48 Planetary nebulae 48 particle collisions 48 sunspots 48 Rayleigh scattering 48 Gehrels 48 submillimeter galaxies 48 radioactivity 48 carbonate minerals 48 Oort cloud 48 SN#A 48 NASA Chandra 48 Zeta Ophiuchi 48 nebulas 48 gamma ray detector 48 impactor 48 absorption spectra 48 mesons 48 SMBH 48 dust enshrouded 48 ultrasonic waves 48 wavelength 48 electron volt 48 radial velocity method 48 highly collimated 48 OGLE TR #b 48 occulted 48 assumed planets circling 48 Cosmologists 48 GCRs 48 deuterium 48 Earth magnetotail 48 Orion nebula 48 circumstellar disks 48 circularly polarized 48 photon fluorescence 48 IBEX spacecraft 48 proton beams 48 Virgo cluster 48 Tycho supernova remnant 48 coronal loop 48 interstellar cloud 48 microwave photons 48 permanently shadowed craters 48 binary quasar 48 Jupiter moon Io 48 infrared 48 sized planets orbiting 48 phonons 48 comet dust 48 Beta Pictoris 48 Kuiper Belt Object 48 Comet Hartley 48 SNR #-#.# 48 spectroscope 48 hydrogen helium 48 galaxy redshift 48 quanta 48 Galilean moons 48 ESO telescope 48 positronium atoms 48 earthlike planets 48 emit photons 48 UV radiation 48 femtoseconds 48 Jenniskens 48 galactic cosmic radiation 48 eclipsing binaries 48 Type Ic supernova 48 synchrotrons 48 Gamma ray burst 48 galaxy M# [001] 48 theoretical particle 48 volcanic moon Io 48 excites electrons 48 collimated 48 Eagle Nebula 48 planetary transits 48 Hipparcos 48 earthshine 48 starlight 48 spectroscopy 48 spinning pulsar 47 inhomogeneities 47 Rydberg atoms 47 terrestrial gamma ray 47 Iapetus 47 radiative cooling 47 GLAST 47 dipole moment 47 planet orbits 47 elemental abundances 47 spectrometer 47 Ultraviolet rays 47 colliders 47 Cosmic ray 47 smallest exoplanet 47 glows brightly 47 Suzaku 47 Relations Observatory STEREO 47 Butterfly Nebula 47 PKS #-# 47 globular star 47 fluorescing 47 galactic nucleus 47 wavelength infrared 47 phosphor coated screen 47 gamma ray astronomy 47 airbursts 47 photocurrent 47 protoplanetary 47 quark 47 ultrashort pulses 47 thermonuclear explosion 47 TrES 4 47 methyl cyanide 47 absorb photons 47 micro meteorites 47 wavefunction 47 moonquakes 47 cosmos 47 ionized plasma 47 Meteor showers 47 interstellar grains 47 Solar System