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(Click for frequent words.) 73 gamma ray emission 69 X ray emission 69 X ray afterglow 67 afterglows 67 Doppler shifts 66 X ray pulses 66 X ray telescopes 66 GRB #B 65 energetic electrons 65 occultations 65 Gamma ray bursts 65 backscattered 65 RHESSI 64 distant supernovae 64 Type Ia supernova 64 SN #A 64 auroral displays 64 ray Space Telescope 64 faint galaxies 64 RS Ophiuchi 64 X ray wavelengths 63 supergiant star 63 XMM Newton 63 intrinsic brightness 63 Carina constellation 63 Comet Holmes 63 Fermi telescope 63 Gamma ray 63 RXTE 63 Crab Nebula 63 blazars 63 energetic gamma rays 63 solar corona 62 gamma rays 62 infrared ultraviolet 62 active galactic nuclei 62 substorm 62 fading afterglow 62 GRB# 62 cosmological distances 62 Epsilon Aurigae 62 blazar 62 RRATs 62 Eta Carinae 62 coronal holes 62 GALEX 61 millisecond pulsars 61 V# Mon 61 AGNs 61 Fomalhaut b 61 gravitational radiation 61 ultraviolet wavelengths 61 gamma ray bursts GRBs 61 moonquakes 61 cosmic ray particles 61 GRBs 61 Cherenkov radiation 61 extragalactic 61 planetary transits 61 foreground galaxy 61 Gamma rays 61 distant galaxy clusters 61 emit X rays 61 Cepheids 61 filamentary structure 61 millisecond pulsar 61 detect gamma rays 60 starburst galaxies 60 MG J# +# 60 X ray observatories 60 gamma ray burst 60 gamma ray observatory 60 gamma ray radiation 60 galaxy redshift 60 starburst galaxy 60 Ulysses spacecraft 60 lensing galaxy 60 Geminga 60 exoplanets orbiting 60 Cat Paw Nebula 60 brightnesses 60 optical wavelengths 60 galactic cosmic rays 60 Orion constellation 60 submillimetre 60 constellation Aquarius 60 galactic disk 59 WASP #b 59 diffuse aurora 59 elliptical galaxy 59 earthshine 59 magnetic reconnection 59 muon neutrinos 59 ionised gas 59 moon Io 59 Type 1a supernovae 59 proplyds 59 retrograde orbit 59 aurorae 59 Gamma ray bursts GRBs 59 blue supergiant 59 magnetar 59 detect gravitational waves 59 constellation Cassiopeia 59 Bug Nebula 59 gravitational lens 59 outer corona 59 Evolution Explorer 59 Comet 9P/Tempel 1 59 Crab Pulsar 59 starquakes 59 magnetars 59 rotating neutron stars 59 VHE gamma rays 59 gamma ray 59 electron neutrinos 59 GRB #A 59 submillimeter 59 redshifts 59 X ray binaries 59 Heliospheric Observatory SOHO 59 Saturn magnetosphere 59 electromagnetic flux 59 AB Aurigae 59 microquasar 59 Hanny Voorwerp 59 exo planets 59 Lyman alpha 59 helium atoms 59 cosmic ray protons 59 NASA Wilkinson Microwave 59 airglow 59 galaxy NGC 59 planetary nebulae 59 Virgo Cluster 59 supernova explosion 58 SN #gy 58 eclipsing binary 58 Cepheid variables 58 red supergiants 58 Delta Cephei 58 coronal mass ejections CMEs 58 luminosities 58 KH #D 58 ENAs 58 type Ia supernovae 58 exoplanetary 58 gamma ray photons 58 Arches Cluster 58 auroral 58 ESA XMM Newton 58 galaxy M# [002] 58 cosmic ray 58 red supergiant 58 Hubble observations 58 transiting exoplanets 58 orbiting gamma ray 58 Supernova #A 58 axions 58 astrophysical phenomena 58 stellar occultations 58 magnetospheric 58 Geminid shower 58 GRB # 58 Cosmic Microwave Background CMB 58 fainter objects 58 VLBA 58 keV 58 radial velocity 58 RS Oph 58 gamma rays emitted 58 gamma ray bursts 58 auroral activity 58 moon Enceladus 58 Fermi Gamma ray 58 X ray binary 58 Type Ia 57 supernova remnants 57 submillimetre wavelengths 57 Beta Pictoris b 57 femtosecond timescale 57 constellation Hercules 57 elongated orbits 57 infrared wavelengths 57 luminous galaxies 57 relativistic particles 57 magnetotail 57 supernova remnant 57 Galaxy Evolution 57 gravitational lenses 57 Orion Nebula 57 distant quasar 57 redshift 57 TGFs 57 distant galaxy 57 constellation Centaurus 57 attosecond 57 photons emitted 57 cosmic microwave radiation 57 faraway galaxies 57 photoluminescence 57 quasar 57 Orionids 57 Spitzer infrared 57 antineutrinos 57 SN #E 57 interacting galaxies 57 supernova explosions 57 YORP effect 57 starbursts 57 constellation Ursa Major 57 gravitational lensing 57 orbiting planets 57 Helix Nebula 57 X ray photons 57 masers 57 Coma Cluster 57 brightest supernova 57 Kuiper belt objects 57 quasars 57 infall 57 UVOT 57 CMEs 57 photosphere 57 type Ia supernova 57 coronal loop 57 gravitational tides 57 astronomical objects 57 infrared wavelength 57 chromosphere 57 microlensing events 57 gravitational redshift 57 novae 57 Anisotropy Probe WMAP 57 Rosette Nebula 57 planets orbits 57 Type Ia supernovae 57 luminosity 57 supernova 57 supersymmetric particles 56 absorption spectra 56 distant galaxies 56 cosmic rays 56 supernovae 56 G#.# +#.# 56 helium ions 56 Type Ia supernovas 56 Upsilon Andromedae 56 visible wavelengths 56 constellation Scorpius 56 redshifted 56 Microlensing 56 exosphere 56 ULP cepheids 56 planet orbits 56 active galactic nucleus 56 Planck satellite 56 energetic cosmic rays 56 GROND 56 accretion disk 56 Quadrantid meteor shower 56 IR wavelengths 56 coronal loops 56 Neil Gehrels Swift 56 galaxy clusters 56 Red Rectangle 56 Saturn auroras 56 gravitational interaction 56 ultrashort pulses 56 Sagittarius B2 56 Alfvén waves 56 observable universe 56 ROSAT 56 transiting planet 56 HD#b 56 nebulae 56 elliptical orbits 56 Solar flares 56 Mpc 56 Bullet Cluster 56 Galilean moons 56 cosmic ray electrons 56 celestial object 56 NASA Fermi Gamma 56 SNR #-#.# 56 slender crescent 56 Cosmic rays 56 terrestrial gamma ray 56 Noctilucent clouds 56 Hipparcos 56 proton proton collisions 56 SCP #F# 56 galaxy M# [001] 56 particle acceleration 56 interstellar dust clouds 56 X ray emitting 56 prominences 56 constellation Virgo 56 Milky Way halo 56 orbiting observatories 56 planets orbiting distant 56 VISTA telescope 56 superluminal 56 pulsations 56 cosmic cannibal 56 PKS #-# 56 lightwaves 56 ultraviolet radiation emitted 55 geoneutrinos 55 HARPS spectrograph attached 55 auroras 55 retroreflector 55 Gravitational waves 55 HM Cancri 55 Keck telescope 55 ultraviolet wavelength 55 planet gravitational tug 55 Galactic cosmic rays 55 prograde 55 gamma ray burst GRB 55 extrasolar planets orbiting 55 gravitational interactions 55 Higgs bosons 55 Ring Nebula 55 submillimeter wavelengths 55 CMB radiation 55 circumstellar 55 relativistic jets 55 volcanic moon Io 55 ionized gas 55 Fermi LAT 55 Epsilon Eridani 55 Cancri e 55 CoRoT satellite 55 polarimetry 55 GJ #b [002] 55 gravitational wobble 55 Earth ionosphere 55 unaided eye 55 laser pulse 55 Orion nebula 55 pulsar 55 Orionid meteors 55 pulsars 55 Perseus cluster 55 supergiant stars 55 emitted photons 55 Saturn aurora 55 SN #D 55 IRAS #-# 55 cosmic gamma rays 55 Perseid meteor 55 ESO VLT 55 radial velocity technique 55 Saturnian moon 55 laser pulses 55 nebulosity 55 sunlike stars 55 X ray spectrometer 55 globular cluster M# 55 Wolf Rayet stars 55 Beehive Cluster 55 tau neutrino 55 wavelengths 55 planetary Transits 55 zodiacal light 55 Andromeda galaxy 55 gamma ray emitting 55 Cassini spacecraft orbiting 55 planet Uranus 55 CoRoT #b 55 magnetic substorms 55 Jovian moons 55 geomagnetic storms 55 gravitational tugs 55 Supernovae 55 periodicities 55 Saturn equinox 55 jovian 55 x ray beam 55 supernovae explosions 55 Comet Hartley 2 55 Nasa spacecraft 55 X ray spectra 55 Betelgeuse 55 moonlets 55 SOHO spacecraft 55 spacecraft flyby 55 icy moons 55 spectral fingerprint 55 ionise 55 weak gravitational lensing 55 spectroscopically 55 comet McNaught 55 substorms 54 astrometry 54 Pleiades star 54 protostars 54 spinning neutron stars 54 GeV 54 Carina Nebula 54 coronal mass ejections 54 Comet Lulin 54 double helix nebula 54 Wilkinson Microwave Anisotropy Probe 54 retrograde orbits 54 HUDF 54 Gamma ray burst 54 protostar 54 Magnetars 54 NASA Cassini spacecraft 54 x ray beams 54 moons orbiting 54 Kuiper Belt Objects 54 Comet Halley 54 gravitational microlensing 54 Saturnian 54 phosphorescence 54 ESA Integral 54 noctilucent 54 planetary nebula 54 Comet Hale Bopp 54 Seyfert galaxies 54 baryon acoustic oscillations 54 constellation Eridanus 54 protons collide 54 periodic dimming 54 photometer 54 interstellar clouds 54 femtosecond pulses 54 Fornax cluster 54 muon neutrino 54 merging galaxies 54 spectroscopic observations 54 gravitational wobbles 54 millimeter wavelength 54 polar mesospheric clouds 54 exoplanet orbiting 54 moon Mimas 54 AKARI 54 STEREO spacecraft 54 BP Piscium 54 shorter wavelengths 54 THEMIS satellites 54 Earth magnetotail 54 comets orbiting 54 reionization 54 diffract 54 Jupiter moon Io 54 Hubble Space Telescope HST 54 electron neutrino 54 elliptical galaxy NGC 54 stellar nurseries 54 supermassive black hole 54 infrared spectrometers 54 distant supernovas 54 stellar occultation 54 Cepheid variable 54 Geminid meteor showers 54 infalling gas 54 electron beams 54 Ringed Planet 54 spiral galaxy NGC 54 W boson 54 Lagoon Nebula 54 exoplanets 54 QCLs 54 stellar seismology 54 femtoseconds 54 Area Telescope LAT 54 arcseconds 54 Comet Hartley 54 lunar perigee 54 Bok globules 54 Andromeda Galaxy 54 dwarf spheroidal galaxies 54 spatially resolved 54 Fomalhaut 54 HD #b [002] 54 transiting planets 54 nucleosynthesis 54 gravitational waves 54 amplitudes 54 accretion disks 54 Lyrids 54 emission nebula 54 proton collisions 54 arcsecond 54 constellation Carina 54 Voorwerp 54 maser emission 54 distant quasars 54 smallest exoplanet 54 surface plasmons 54 TrES 4 54 noctilucent clouds 54 comet Tempel Tuttle 54 KBOs 54 cluster NGC 54 electron volts eV 54 gravity warps 53 planet orbiting 53 silicon monoxide 53 sized planets orbiting 53 neutron radiation 53 Circinus X 1 53 Eta Aquarid meteor shower 53 antineutrino 53 Mercury exosphere 53 Doppler shift 53 planet Gliese #g 53 UV wavelengths 53 coronagraph 53 Comet #P/Holmes 53 globulars 53 particle beam 53 pointings 53 Saturn moon Mimas 53 supernova SN 53 nebula 53 galactic halo 53 Infrared Thermal Imaging Spectrometer 53 linearly polarized 53 Hubble orbits 53 reflection nebula 53 solar flares 53 gamma ray flashes 53 meteoritic material 53 constellation Taurus 53 millimeter wavelengths 53 ionized particles 53 protoplanetary disks 53 star Spica 53 Triangulum Galaxy 53 Telescope BAT 53 infrared imager 53 planets orbiting sun 53 spectroscopic measurements 53 Orionid 53 Perseid shower 53 Explorer WISE 53 Hale Bopp 53 planets orbiting 53 protoplanetary disk 53 neutrino particles 53 Samuel Oschin Telescope 53 cosmic phenomena 53 photon energies 53 giant elliptical galaxy 53 muons 53 photons particles 53 volcanic plumes 53 galactic bulge 53 X ray observatory 53 Earthlike planets 53 infrared telescopes 53 ultraviolet laser 53 comet Hale Bopp 53 wavelength infrared 53 Jupiter Uranus 53 southern constellation Carina 53 Milky Way Galaxy 53 sun corona 53 UDFy # 53 radial velocity method 53 THz radiation 53 ecliptic 53 Pegasi 53 solar neutrinos 53 Chi Cygni 53 cosmic ray flux 53 interstellar dust 53 NEAs 53 spherically symmetric 53 orbits 53 Henize #-# 53 filamentary structures 53 Type 1a supernova 53 AU Mic 53 Raman spectroscopic 53 VB #b 53 Adam Riess 53 star Beta Pictoris 53 TNOs 53 gaseous planets 53 gravitationally lensed 53 near infrared NIR 53 #/#Z 53 microlensing 53 icy comets 53 gamma ray detectors 53 comet nucleus 53 Stephan Quintet 53 WHIM 53 gravitational perturbations 53 starlike object 53 Geminid meteors 53 celestial objects 53 supernovas 53 Perseid meteors 53 galactic cores 53 gamma ray repeater 53 Crab pulsar 53 impactors 53 geomagnetic activity 53 cosmic microwave background 53 Anisotropy Probe 53 colliding protons 53 cosmic ray collisions 53 terahertz waves 53 constellation Cetus 53 galaxy cluster 53 extrasolar 53 circumstellar disk 53 inner Oort Cloud 53 Wolf Rayet star 52 multiwavelength 52 galactic mergers 52 tidal bulge 52 CoRoT 9b 52 gamma ray astronomy 52 Galileo spacecraft 52 Leonid meteors 52 atmospheric phenomena 52 sunlike star 52 sterile neutrino 52 Perseus Cluster 52 extrasolar planet 52 eclipsing binaries 52 Proxima Centauri 52 bolometers 52 proton antiproton 52 PSR J# +# 52 constellation Bootes 52 arcsec 52 planet magnetosphere 52 orbiting Chandra 52 neutrino 52 SN#A 52 Zeta Ophiuchi 52 Coma cluster 52 anomalous cosmic rays 52 specular reflection 52 X ray spectroscopy 52 Helix nebula 52 polaritons 52 GQ Lupi 52 NASA Gamma ray 52 planet HD #b 52 Raman scattering 52 constellation Gemini 52 planetary nebulas 52 ion collisions 52 circumstellar disks 52 Elenin 52 Saturn outermost 52 Multi Object Spectrometer 52 HESS telescopes 52 dipole moment 52 ringed planet 52 Geminids meteor shower 52 coronal mass ejection 52 Mini TES 52 elongated orbit 52 solar radii 52 coronal heating 52 electrons positrons 52 blinding flashes 52 excitations 52 oppositely directed 52 moonlet 52 hypernova 52 Trifid Nebula 52 Venus transits 52 infrared radiation 52 VLTI 52 magnetosphere 52 protoplanetary discs 52 magnetic fields 52 particle colliders 52 spectroscopic 52 circularly polarized 52 Trifid 52 Chandra Observatory 52 Mössbauer 52 Corot 9b 52 Charon Pluto 52 ionized hydrogen 52 X ray Telescope XRT 52 Perseus constellation 52 Small Magellanic Cloud 52 ESO telescopes 52 Saturn moon Enceladus 52 VY Canis Majoris 52 runaway thermonuclear 52 infrared photons 52 HII regions 52 rotating neutron 52 cosmic particles 52 constellation Orion 52 highly elliptical orbits 52 star Gliese 52 sodium atoms 52 Earthlike planet 52 Cosmic Microwave Background 52 X ray beams 52 imaging spectrometer 52 photoemission 52 mesosphere 52 hypervelocity stars 52 Infrared Array Camera 52 spectrometric 52 oscillations 52 micron wavelengths 52 spectra 52 gaseous planet 52 interferometry 52 NASA Lunar Prospector 52 #P/Holmes 52 submillimeter galaxies 52 Swift Ultraviolet Optical 52 Comet Encke 52 circularly polarized light 52 Tycho supernova remnant 52 X rays gamma rays 52 spectrographs 52 attosecond pulses 52 spectral bands 52 globular cluster 52 Saturn Cassini 52 Aurigid 52 gamma ray photon 52 proton particles 52 OGLE TR #b 52 Puppis 52 dwarf novae 52 Butterfly Nebula 52 planets orbiting stars 52 galactic clusters 52 Saturnian moons 52 magnetic dipole 52 ULIRGs 52 Submillimeter Array 52 Type Ic supernovae 52 galaxies collide 52 metallicity 52 extrasolar planets 52 quasiparticle 52 J# +# [002] 52 SINFONI 52 highly collimated 52 optical telescopes 52 dust enshrouded 52 muon 52 HiRISE image 52 Particle acceleration 52 lava fountains 52 arcminutes 52 RX J# 52 Meteor showers 52 BP Psc 52 geomagnetic substorms 52 asteroids comets 52 HL Tau 52 inhomogeneous 52 dwarf galaxy 52 synchrotron x ray 52 comet Lulin 51 Infrared Pathfinder Satellite 51 LORRI 51 diffraction patterns 51 plasmasphere 51 neutron spectrometer 51 planemos 51 Comet Elenin 51 photons 51 Swift Burst 51 synchrotron emission 51 cryovolcanism 51 brown dwarfs 51 comet orbit 51 Very Large Array 51 Gravitational lensing 51 Laser Interferometer Gravitational Wave 51 Corot 7b 51 waxing gibbous moon 51 Comet McNaught 51 EPOCh 51 antiparticle 51 lunar crust 51 C1XS 51 Peony nebula star 51 Cygnus X 51 SN #C 51 Rayleigh scattering 51 emits X rays 51 coronal hole 51 Tarantula Nebula 51 NASA Chandra 51 Cassini flybys 51 photometry 51 Infrared Mapping Spectrometer VIMS 51 Comet Tempel Tuttle 51 NASA Cassini orbiter 51 bilayer graphene 51 super perigee moon 51 spectral fingerprints 51 neutralino 51 nebular 51 Pleiades cluster 51 Hyades cluster 51 spiral galaxy 51 Earth asteroids NEAs 51 Antennae Galaxies 51 Toutatis 51 magnetized plasma 51 glows brightly 51 NICMOS 51 innermost planet 51 x ray pulses 51 rotational axis 51 Doradus 51 velocity vector 51 solar prominences 51 shortwave infrared 51 Kuiper belt 51 moons orbiting Saturn 51 SDSS II 51 Monoceros 51 starlike 51 protoplanet 51 amateur astronomers peering 51 ionized gases 51 celestial fireworks 51 elliptical galaxies 51 interstellar boundary 51 Kepler 9c 51 Gamma Ray 51 Upsilon Andromedae b 51 geomagnetic storm 51 PSR J# 51 Katzman Automatic 51 mineralogical composition 51 Leonids 51 Comet Machholz 51 ultraviolet imaging spectrograph 51 electronvolts 51 infrared spectra 51 sunspot cluster 51 waning gibbous 51 occultation 51 Gliese #e 51 nanostars 51 VIRTIS 51 MeV 51 tropospheric 51 Encke gap 51 magnetopause 51 Solar TErrestrial RElations Observatory 51 planets Uranus 51 Eta Aquarids 51 celestial sphere 51 constellation Sagittarius 51 GJ#b 51 WISE infrared 51 olivine mineral 51 terahertz THz 51 QQ# 51 RY Sagittarii 51 galaxies 51 high redshift galaxies 51 Saturn rings 51 x ray scattering 51 mantle plumes 51 Lyrid meteor shower 51 Bose Einstein condensates 51 radiometers 51 Cygnus Lyra region 51 PUVA psoralen plus 51 R Coronae Borealis 51 Saturnian system 51 planets asteroids 51 TrES 51 extrasolar planetary systems 51 protoplanets 51 airbursts 51 infalling 51 blackbody 51 microwave radiation 51 galactic alignment 51 ESO Very Large Telescope 51 Spectrograph 51 Alfven waves 51 electron volts 51 globular clusters 51 proton proton 51 hydroxyl molecules 51 exhaust plume 51 permanently shadowed craters 51 maser 51 rubidium vapor 51 Gal Yam 51 absorbs photons 51 SNe Ia 51 picoseconds 51 aurora 51 ultraviolet photons 51 Brookhaven Relativistic Heavy 51 interferometers 51 stimulated emission 51 Solar Dynamics Observatory 51 plasma spectrometer 51 reddish glow 51 WMAP satellite 51 gamma ray observatories 51 waxing crescent 51 binary quasar 51 magnetic polarity 51 constellation Puppis 51 Hot Jupiters 51 HD# [002] 51 assumed planets circling 51 wavefronts 51 penumbral lunar eclipse 51 lowermost mantle 51 nebulas 51 neutron beams 51 colloidal crystals 51 auroral emissions 51 Hyakutake 51 anisotropy 51 colliding galaxies 51 Composite Infrared Spectrometer 51 Saturn Jupiter Uranus 51 crystalline silicates 51 Earth orbiting satellites 50 Muchachos Observatory 50 ejecta plume 50 APXS 50 Iridium satellites 50 FWHM 50 circular orbits 50 particles WIMPs 50 PSR B# +# 50 neutrinos 50 super nova 50 pulsating aurora 50 Wilkinson Microwave Probe 50 baryon 50 protoplanetary 50 bolide 50 Jupiter magnetosphere 50 WIMPs 50 orbits Saturn 50 moon gravitational pull 50 Ultraviolet Optical Telescope 50 Kuiper Belt Object 50 kaons 50 HETE 50 neutron star 50 proton antiproton collisions 50 atmospheric aerosols 50 Veil Nebula 50 celestial phenomena 50 GJ #b [001] 50 Burst Alert 50 optical spectra 50 cosmic neutrinos 50 Omega Centauri 50 solar nebula 50 spinning neutron 50 matter antimatter asymmetry 50 nightside 50 surface plasmon 50 comet 50 Planetary Transits 50 ARPES 50 velocity dispersion 50 constellation Cygnus 50 galaxy 50 axion 50 ultraviolet 50 unpolarized 50 Large Magellanic Cloud 50 Herbig Haro 50 photomultiplier tubes 50 IBEX spacecraft 50 positrons 50 submillimeter wavelength 50 inhabitable planets 50 Active Galactic Nuclei 50 Saturn Enceladus 50 evanescent waves 50 reddish orange hue 50 ionised 50 precess 50 Beta Pictoris 50 electrical resistivity 50 dynamical evolution