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(Click for frequent words.) 71 fainter objects 70 distant galaxies 70 celestial objects 67 quasars 67 X ray wavelengths 66 Kuiper Belt Objects 66 habitable planets 66 GRBs 65 distant supernovae 65 globular clusters 65 sunlike stars 65 cosmological distances 64 nebulae 64 extrasolar planets 64 Kuiper belt objects 64 luminous galaxies 64 solar corona 64 KBOs 64 Orion Nebula 64 extragalactic 64 ultraviolet wavelengths 63 extrasolar planetary systems 63 earthlike planets 63 planetary nebulae 63 planets orbiting 63 X ray telescopes 63 planets orbiting stars 63 distant galaxy 63 faint galaxies 63 starburst galaxies 63 magnetars 63 astrophysical phenomena 63 astrophysical objects 63 blazars 63 XMM Newton 63 Evolution Explorer 63 transiting planets 63 cosmic phenomena 63 Omega Centauri 62 AGNs 62 Fermi telescope 62 planets 62 Epsilon Eridani 62 intrinsic brightness 62 exoplanet 62 noctilucent clouds 62 exoplanets orbiting 62 gamma ray bursts 62 exoplanets 62 supernovae 62 distant quasars 62 infrared wavelengths 62 filamentary structure 62 gravitational lenses 62 galaxies 61 distant galaxy clusters 61 comet nucleus 61 Coma Cluster 61 exoplanetary 61 Red Rectangle 61 Earthlike planets 61 transiting planet 61 GALEX 61 Gamma ray bursts 61 extrasolar 61 starburst galaxy 61 visible wavelengths 61 X ray emission 60 rocky planets 60 Corot 9b 60 globular cluster 60 Milky Way Galaxy 60 pulsars 60 occultations 60 Galilean satellites 60 Andromeda Galaxy 60 Gravitational waves 60 inhabitable planets 60 Epsilon Aurigae 60 millisecond pulsars 60 brightnesses 60 supernova remnants 60 aurorae 60 Galaxy Evolution 60 distant supernovas 60 KH #D 60 Hubble observations 60 icy moons 60 millimeter wavelengths 60 NEAs 60 Cepheids 59 AB Aurigae 59 terrestrial planets 59 brown dwarfs 59 planets orbiting distant 59 blazar 59 spectroscopic observations 59 Fomalhaut b 59 astronomers 59 active galactic nuclei 59 polarimetry 59 COROT 59 CMB radiation 59 supergiant star 59 type Ia supernovae 59 SN #A 59 Galilean moons 59 unaided eye 59 gamma ray burst 59 Comet Holmes 59 Milky Way galaxy 59 Cepheid variables 59 comet 59 extrasolar planet 59 ESO VLT 59 planets orbiting sun 59 RXTE 59 astrophysical 59 Beta Pictoris b 59 metallicity 59 interstellar dust 59 Geminga 59 SN #gy 59 X ray observatories 58 protoplanetary disks 58 supernova remnant 58 HUDF 58 microlensing events 58 AKARI 58 HD#b 58 HiRISE image 58 galactic mergers 58 interacting galaxies 58 supernovas 58 celestial object 58 redshifts 58 spectroscopic measurements 58 transiting exoplanets 58 airglow 58 Kuiper belt 58 optical telescopes 58 Higgs particle 58 infrared telescopes 58 spectroscopic 58 P/# A2 58 supernova explosion 58 Type Ia supernovae 58 globular cluster M# 58 planemos 58 constellation Ursa Major 58 axions 58 planet orbiting 58 Milky Way halo 58 gravitational wave 58 nebulas 58 Venusian atmosphere 58 electron neutrinos 58 submillimeter 58 optical spectra 58 novae 58 stellar nurseries 58 eclipsing binary 58 Type Ia supernovas 58 hydrated minerals 58 Andromeda galaxy 57 Eagle Nebula 57 ESA XMM Newton 57 submillimeter galaxies 57 TGFs 57 diffuse aurora 57 earthshine 57 proplyds 57 comets 57 planetary nebula 57 UVOT 57 circumstellar disks 57 retrograde orbits 57 X ray binary 57 merging galaxies 57 planets constellations 57 Earthlike 57 RRATs 57 Earthlike planet 57 GRB #B 57 mineralogical composition 57 submillimeter wavelengths 57 redshift 57 gamma ray emission 57 galaxy 57 exo planets 57 Higgs bosons 57 interstellar clouds 57 SCP #F# 57 quasar 57 Saturn magnetosphere 57 SDSS II 57 planet Gliese #g 57 HD #b [002] 57 TNOs 57 RHESSI 57 constellations planets 57 XMM Newton observations 57 galaxy NGC 57 gamma ray flares 57 supernova explosions 57 galaxy cluster 57 gravitational microlensing 57 astrometric 57 gamma ray observatory 57 planetary transits 56 Virgo Cluster 56 permanently shadowed craters 56 X ray binaries 56 radial velocity 56 constellation Centaurus 56 habitable worlds 56 infrared spectra 56 gravitational waves 56 red supergiants 56 Spitzer Space Telescope 56 gravitationally lensed 56 CoRoT satellite 56 Geminids 56 galaxy redshift 56 HARPS instrument 56 Arches Cluster 56 Small Magellanic Cloud 56 constellation Taurus 56 sized planets orbiting 56 biosignatures 56 elliptical galaxy 56 WASP #b 56 Wolszczan 56 Jupiter moon Io 56 type Ia supernova 56 galaxy clusters 56 gravitational lensing 56 submillimetre 56 spatially resolved 56 nebular 56 Saturnian moon 56 X ray observatory 56 Saturn rings 56 astronomical phenomena 56 Great Observatories 56 magnetar 56 ULIRGs 56 comets asteroids 56 X ray pulses 56 carbonaceous chondrites 56 optical wavelengths 56 cometary 56 elliptical galaxies 56 barred spiral galaxy 56 infrared wavelength 56 supernova 56 ULP cepheids 56 astrometry 56 Stephan Quintet 56 Helix Nebula 56 Crab Nebula 56 proto galaxies 56 stellar occultations 56 Ring Nebula 56 Comet Machholz 56 asteroids comets 56 ejecta 56 Carina constellation 56 Martian meteorites 56 Kuiper Belt objects 56 Monoceros 56 Henize #-# 56 intracluster 56 auroras 56 Solar System 56 ecliptic plane 56 Great Orion Nebula 56 NASA Chandra 56 Enceladus 55 protostars 55 dust enshrouded 55 celestial bodies 55 HII regions 55 VIRTIS 55 Lagoon Nebula 55 spectral fingerprints 55 phyllosilicates 55 nebula 55 elongated orbits 55 Eta Carinae 55 Pleiades cluster 55 spiral galaxy 55 constellation Carina 55 Saturn moon Enceladus 55 Spitzer infrared 55 Saturn Enceladus 55 neutron stars 55 planets moons 55 detect gamma rays 55 exosolar planets 55 photosphere 55 Quadrantids 55 dwarf galaxies 55 supersymmetric particles 55 coronal loop 55 chemical abundances 55 auroral 55 GJ #b [002] 55 highly elliptical orbits 55 telescopes 55 interstellar dust particles 55 Comet Hartley 2 55 submillimetre wavelengths 55 J# +# [002] 55 Orionids 55 Perseus Cluster 55 afterglows 55 reflection nebula 55 Orionid 55 microquasar 55 Amateur astronomers 55 Oort Cloud 55 Delta Cephei 55 BP Psc 55 habitable zones 55 wavelengths 55 Astrophysicists 55 masers 55 gaseous planet 55 MG J# +# 55 astronomy 55 diffraction patterns 55 planets astronomers 55 cosmological parameters 55 gravitational radiation 55 exoplanet orbiting 55 WFC3 55 Corot 7b 55 G#.# +#.# 55 lensing galaxy 55 interstellar dust grains 55 globulars 55 Cosmic Microwave Background CMB 55 galaxy M# [001] 55 Type Ia 55 Hipparcos 55 UDFy # 55 constellation Virgo 55 exoplanets planets outside 55 baryonic matter 55 galactic cosmic rays 55 Cosmic Microwave Background 55 Triangulum Galaxy 55 circumstellar 55 galaxy formation 55 luminosities 55 Hanny Voorwerp 55 Quadrantid meteor shower 55 RS Ophiuchi 55 spiral galaxies 55 Type Ia supernova 55 comets orbiting 55 GJ #b [001] 55 exosphere 55 Cosmic Evolution 55 Dwarf galaxies 55 meteorites 55 Pluto Charon 55 Earth asteroids 55 planetary atmospheres 55 exoplanets planets 55 supergiant stars 55 dwarf galaxy 55 dimming starlight 55 Proxima Centauri 55 Rosette Nebula 54 SNfactory 54 gravitational lens 54 spectra 54 photometry 54 faraway galaxies 54 WIMPs 54 Grillmair 54 Magnetars 54 interstellar cloud 54 energetic electrons 54 F#W 54 eccentric orbits 54 eclipsing binaries 54 microlensing 54 Anisotropy Probe WMAP 54 gamma ray emitting 54 Antennae Galaxies 54 Wolf Rayet stars 54 auroral activity 54 brown dwarf 54 planets orbits 54 spectroscopically 54 coronagraph 54 subsurface ocean 54 OGLE TR #b 54 zodiacal light 54 GRB # 54 extrasolar planets orbiting 54 Descent Imager Spectral Radiometer 54 auroral displays 54 Beta Pictoris 54 detect gravitational waves 54 gaseous planets 54 planets asteroids 54 Milky Way 54 planet HD #b 54 exoplanet atmospheres 54 Upsilon Andromedae 54 gamma ray telescopes 54 Comet Lulin 54 Carina Nebula 54 Solar TErrestrial RElations Observatory 54 super Earths 54 orbiting gamma ray 54 Neptune Uranus 54 elliptical galaxy NGC 54 Cat Paw Nebula 54 type 1a supernovae 54 protons collide 54 ESO telescope 54 missing baryons 54 infrared spectrometers 54 smallest exoplanet 54 Hubble Ultra 54 constellation Cassiopeia 54 interstellar molecules 54 comet McNaught 54 Planck satellite 54 planetoids 54 cosmic microwave radiation 54 spectrographs 54 moons orbiting Saturn 54 photometer 54 star clusters nebulae 54 planets circling 54 planetary surfaces 54 moon Enceladus 54 IRC +# 54 star Gliese 54 neutron star 54 planets comets 54 Voorwerp 54 SIRTF 54 extraterrestrial civilizations 54 HiRISE images 54 galactic nuclei 54 Astrophysical 54 Kepler telescope 54 Lyrids 54 Sombrero Galaxy 54 magnetospheres 54 lunar craters 54 Cancri e 54 Hubble orbits 54 planetary nebulas 54 sterile neutrino 54 ESO PR 54 dwarf spheroidal galaxies 54 NASA Wilkinson Microwave 54 tholins 54 Muchachos Observatory 54 starquakes 54 celestial sphere 54 cosmic rays 54 polar craters 54 galaxies nebulae 54 radiometers 53 AU Mic 53 interstellar dust clouds 53 planets circling stars 53 meteors 53 distant quasar 53 constellation Pegasus 53 magnetotail 53 2MASS 53 HIRES spectrometer 53 Orion nebula 53 constellation Orion 53 celestial phenomena 53 Perseid meteors 53 HiRISE camera aboard 53 permanently shadowed regions 53 trans Neptunian objects 53 substorms 53 potentially habitable planets 53 CoRoT 9b 53 antineutrinos 53 telescopic observations 53 neutralinos 53 infrared ultraviolet 53 magnetic monopoles 53 Explorer WISE 53 Mimas 53 gravitationally bound 53 Doppler shifts 53 WMAP satellite 53 GRB #A 53 Bok globules 53 SN #C 53 spectroscope 53 pulsar 53 GJ#b 53 VISTA telescope 53 exoplanetary systems 53 Dumbbell Nebula 53 Microlensing 53 moon Charon 53 Kuiper Belt 53 VY Canis Majoris 53 Saturn aurora 53 quark gluon plasma 53 telescopes astronomers 53 Kepler #b 53 Leonids 53 LORRI 53 radial velocity technique 53 X ray afterglow 53 aurora 53 dynamical processes 53 distant suns 53 Coma cluster 53 Earthshine 53 solar nebula 53 Type 1a supernovae 53 lunar crust 53 IR wavelengths 53 moonquakes 53 hematite mineral 53 NASA Kepler 53 geoneutrinos 53 protoplanetary disk 53 CoRoT 7b 53 infrared radiation 53 hot Jupiters 53 Gamma ray 53 Bug Nebula 53 X ray Observatory 53 observable universe 53 accretion disk 53 astrobiologists 53 accretion disks 53 meteoroids 53 Noctilucent clouds 53 imaging spectrometer 53 CRISM 53 infrared interferometry 53 Mpc 53 arcminutes 53 Gravitational lensing 53 Cassini flyby 53 Konacki 53 spaceweather.com 53 spectroscopic analysis 53 ray Space Telescope 53 STEREO spacecraft 53 Wilkinson Microwave Anisotropy Probe 53 planets atmospheres 53 solar flares 53 asteroseismology 53 galaxies collide 53 galaxy M# [002] 53 CAIs 53 polar regions 53 globular star 53 pointings 52 Digitized Sky Survey 52 telescope 52 galactic collisions 52 Puppis 52 JDEM 52 orbits 52 constellation Aquila 52 hexagonal mirrors 52 Sedna 52 heavily cratered 52 Lyman alpha 52 Jovian moons 52 planet Uranus 52 moon Io 52 astrophysicists 52 reionization 52 Extrasolar planets 52 Cassini 52 Io Europa 52 substorm 52 planetary Transits 52 infrared astronomy 52 exo planet 52 astrobiological 52 spectral signatures 52 spiral galaxy NGC 52 HD# [002] 52 Cygnus Lyra region 52 plasma spectrometer 52 silicate dust 52 giant elliptical galaxy 52 lunar topography 52 ESO Very Large Telescope 52 elliptical orbits 52 active galactic nucleus 52 periodic dimming 52 supermassive black holes 52 CoRoT #b 52 Veil Nebula 52 Gliese #c 52 binary quasar 52 noctilucent 52 Spectrograph 52 outer corona 52 NASA QuikScat satellite 52 Omega Nebula 52 cosmic microwave background 52 coronal loops 52 red supergiant 52 SN#A 52 shorter wavelengths 52 shadowy craters 52 Orbiter LRO 52 antimatter particles 52 Saturn moons 52 Kuiper Belt Object 52 assumed planets circling 52 Comet McNaught 52 WFPC2 52 constellation Cygnus 52 cometary material 52 constellation Sagittarius 52 NEOs 52 jovian 52 Comet Hartley 52 Saturnian moons 52 dynamical evolution 52 astronomical observations 52 constellation Hercules 52 HiRISE 52 Very Large Telescope 52 Large Magellanic Cloud 52 DISR 52 spiral nebulae 52 bolometers 52 PSR J# 52 Deep Field HUDF 52 galactic disk 52 magnetosphere 52 Trifid Nebula 52 coronal mass ejections CMEs 52 ROSAT 52 atmospheric phenomena 52 submillimeter wavelength 52 Gamma rays 52 cosmological theories 52 VLTI 52 Earth magnetosphere 52 Kuiper belt object 52 supernova SN 52 Exoplanets 52 supermassive black hole 52 Perseids 52 spiral galaxy Messier 52 Mössbauer 52 Galileo spacecraft 52 nucleosynthesis 52 protoplanetary discs 52 Fornax cluster 52 extrasolar worlds 52 asteroids 52 galactic clusters 52 Lunar Reconnaissance Orbiter LRO 52 moonlets 52 asteroidal 52 Gamma ray burst 52 spatial dimensions 52 Comet Tempel Tuttle 52 redshifted 52 gamma rays 52 Context Camera 52 colliding galaxies 52 HiRISE camera 52 silicates 52 radial velocity method 52 Interstellar Boundary Explorer 52 cosmological observations 52 Gliese #d 52 planet orbits 52 chondrules 52 icy comets 52 baryon 52 moons orbiting 52 constellations Cygnus 52 ultraviolet radiation emitted 51 Earth ionosphere 51 X ray emitting 51 planets Uranus 51 interstellar grains 51 orbiting Hubble Space Telescope 51 NASA Cassini spacecraft 51 ionized gas 51 cosmologists 51 Keck telescope 51 Cosmic rays 51 polar mesospheric clouds 51 Saturn Cassini 51 Infrared Array Camera 51 Magellanic Clouds 51 Toutatis 51 orbiting Chandra 51 RQ# 51 N. Rathnasree 51 moons circling 51 Very Large Array 51 spookfish 51 Tarantula Nebula 51 millisecond pulsar 51 rotating neutron stars 51 orbiting observatories 51 HM Cancri 51 Voyager spacecraft 51 foreground galaxy 51 cluster NGC 51 binary asteroid 51 Cosmologists 51 Spitzer infrared spectrograph 51 APXS 51 constellations 51 infrared spectrograph 51 ultraluminous galaxy 51 HARPS spectrograph attached 51 prominences 51 RS Oph 51 GQ Lupi 51 Supernova #A 51 Galactic cosmic rays 51 photometric 51 Betelgeuse 51 circumstellar disk 51 Kepler Mission 51 supersymmetry 51 UKIRT 51 Helix nebula 51 infrared imager 51 ringed planet 51 planet HD#b 51 WM Keck Observatory 51 constellation Andromeda 51 coronal holes 51 infrared 51 comet Lulin 51 Orion constellation 51 Candor Chasma 51 sun corona 51 neutrino 51 stellar occultation 51 Comet Hale Bopp 51 Diviner 51 Saturn auroras 51 GRB# 51 Globular clusters 51 IBEX spacecraft 51 planet transits 51 Keck Interferometer 51 innermost planet 51 polar stratospheric 51 ESA Integral 51 Earths orbiting 51 ionospheric 51 Keck Telescope 51 Pleiades star 51 EPOXI 51 Exoplanet 51 nebulosity 51 wavelength infrared 51 extrasolar planetary 51 superfluids 51 protoplanetary 51 Jupiter Uranus 51 V# Mon 51 Jupiter Ganymede 51 Ritchey Chrétien 51 interstellar boundary 51 Geminid 51 Hale Bopp 51 retrograde orbit 51 constellation Eridanus 51 orbiting planets 51 magnetic reconnection 51 particle acceleration 51 starbursts 51 neutrinos 51 Saturnian moon Titan 51 occultation 51 Observatory SDO 51 potentially habitable 51 spectral signature 51 electromagnetic flux 51 comet nuclei 51 supermassive 51 interstellar medium 51 lightwaves 51 LOFAR 51 hypervelocity stars 51 galactic bulge 51 ultracold gases 51 tau neutrinos 51 smallest extrasolar planet 51 neutral mass spectrometer 51 protoplanet 51 silicon monoxide 51 martian meteorites 51 relativistic particles 51 multiwavelength 51 Earth orbiting satellites 51 protostar 51 Aurigid 51 cosmic ray 51 star Fomalhaut 51 THEMIS 51 baryons 51 backscattered 51 neutrino particles 51 Fermi Gamma ray 51 VB #b 51 Nasa Kepler 51 Adam Riess 51 blackbody 51 Hyakutake 51 comets meteors 51 SNR #-#.# 51 Mercury exosphere 51 SDSS 51 isotopic ratios 50 cosmic cannibal 50 #x magnification [002] 50 Global Surveyor spacecraft 50 stellar seismology 50 observational astronomy 50 planet Gliese #c 50 situ measurements 50 high temperature superconductivity 50 carbonate minerals 50 astrophotographer 50 interstellar distances 50 Cepheid variable 50 Tevatron experiments 50 constellation Aquarius 50 spectrographic 50 Relations Observatory STEREO 50 brightest comet 50 dwarf planets 50 meteoritic material 50 NIRSpec 50 Herschel Space 50 energetic gamma rays 50 galactic halo 50 INMS 50 Mars Squyres 50 comet Tempel Tuttle 50 Kepler Space Telescope 50 gravitational redshift 50 SINFONI 50 smoggy atmosphere 50 amateur astronomers 50 meteor showers 50 Huygens mission 50 crystalline silicates 50 cosmological models 50 lunar meteorites 50 star Spica 50 chondrites 50 Syrtis Major 50 Geminid shower 50 underwater volcanoes 50 cosmic gamma rays 50 Kuiper Belt object 50 carbonate globules 50 Cygnus X 50 comet Hale Bopp 50 Cerro Paranal 50 planetary science 50 spectral characteristics 50 Oort cloud 50 magnetic fields 50 Dennis Mammana 50 Submillimeter Array 50 unmanned probes 50 COROT 7b 50 Elliptical galaxies 50 Neutron stars 50 constellation Perseus 50 Martian craters 50 cosmic particles 50 visit http:/saturn.jpl.nasa.gov 50 Gliese #e 50 RY Sagittarii 50 ecliptic 50 Olympus Mons 50 Trojan asteroids 50 cosmos 50 Orionid meteors 50 NASA Cosmic Background 50 gravitational perturbations 50 Alfven waves 50 polar caps 50 zodiac constellations 50 circumstellar dust 50 olivine mineral 50 Wilkinson Microwave Probe 50 THEMIS satellites 50 Canes Venatici 50 heliosphere 50 spectral fingerprint 50 JWST 50 Cancri 50 BP Piscium 50 Nasa spacecraft 50 RAS Observatory 50 Planck 50 WMAP 50 Aram Chaos 50 Martian rocks 50 Pieter van Dokkum 50 Comet Halley 50 Libra constellation Vogt 50 sodium atoms 50 gamma ray 50 moonlet 50 moons Phobos 50 spherical halo 50 Valles Marineris 50 cometary dust 50 constellation Cetus 50 celestial observations 50 Supernovae 50 WHIM 50 Gondolo 50 prebiotic molecules 50 Jenniskens 50 radar interferometry 50 ionised gas 50 Heliospheric Observatory SOHO 50 star Proxima Centauri 50 energetic cosmic rays 50 corona 50 SUSY 50 alien civilizations 50 ENAs 50 auroral emissions 50 cosmic neutrinos 50 Gemini constellation 50 Mars Orbiter Camera 50 gravitational interactions 50 Solar Orbiter 50 fluorophores 50 ESO telescopes 50 NEOWISE 50 Pancam 50 primordial galaxies 50 supervolcanoes 50 orbital resonance 50 Compact Reconnaissance Imaging Spectrometer 50 astronomical telescopes 50 diffraction pattern 50 #P/Churyumov-Gerasimenko 50 permanently shadowed 50 plutoids 50 axial tilt 50 novas 50 amateur astronomers peering 50 Solar Dynamics Observatory 50 geostationary orbits 50 brightest supernova 50 constellation Libra 50 Astronomy 50 Maunder minimum 50 multiband imaging photometer 50 UV wavelengths 50 lunar orbits 50 Jupiter magnetosphere 50 Mini TES 50 Butterfly Nebula 50 Komossa 50 infrared observatory 50 Astronomers 50 Fermi Telescope 50 infrared spectral 50 spectral bands 50 GZK cutoff 50 Raman spectra 50 magnetic substorms 50 sunlike star 50 southern constellation Carina 50 transiting exoplanet 50 Multi Object Spectrograph 50 Galactic Plane