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(Click for frequent words.) 70 astronomical objects 62 distant galaxies 62 celestial bodies 61 nebulae 61 Galilean moons 61 luminous galaxies 61 Orion Nebula 61 extragalactic 61 exoplanetary 60 transiting planets 60 cosmological distances 59 occultations 59 constellations 59 planets 59 fainter objects 59 quasars 59 planets orbiting 59 exoplanets orbiting 59 X ray wavelengths 58 extrasolar planets 58 Earthlike planets 58 astrophysical phenomena 58 Cepheids 58 distant supernovae 58 astronomers 58 Andromeda Galaxy 58 Cepheid variables 58 Galilean satellites 58 Epsilon Aurigae 58 ultraviolet wavelengths 57 Beta Pictoris b 57 XMM Newton 57 planets orbiting distant 57 exoplanets 57 Red Rectangle 57 noctilucent clouds 57 KBOs 57 extrasolar planetary systems 57 solar corona 57 Milky Way Galaxy 57 transiting planet 57 Kuiper belt objects 57 unaided eye 57 brightnesses 57 Omega Centauri 57 distant quasars 57 astrophysical 56 GRBs 56 Fermi telescope 56 HD#b 56 Great Observatories 56 astronomical phenomena 56 earthlike planets 56 Epsilon Eridani 56 brown dwarfs 56 gravitational lenses 56 supernovae 56 X ray telescopes 56 globular clusters 56 planets circling 56 celestial object 55 infrared telescopes 55 Jovian moons 55 starburst galaxies 55 aurorae 55 Gamma ray bursts 55 COROT 55 active galactic nuclei 55 sunlike stars 55 Cancri e 55 AGNs 55 extrasolar planet 55 polarimetry 55 planets orbiting sun 55 millimeter wavelengths 55 habitable planets 55 telescopes 55 planets orbits 55 distant quasar 55 planets orbiting stars 55 Comet Holmes 55 stellar nurseries 55 supernovas 55 faint galaxies 55 supergiant star 55 cosmic phenomena 55 Kuiper Belt Objects 55 Quadrantids 55 galaxies 55 Rosette Nebula 55 magnetars 55 planets constellations 55 novae 54 exoplanets planets 54 blazars 54 globular cluster 54 redshifts 54 planetary nebulae 54 exosolar planets 54 distant galaxy 54 constellation Ursa Major 54 pulsars 54 constellations planets 54 planets moons 54 astronomy 54 AB Aurigae 54 merging galaxies 54 inhabitable planets 54 constellation Centaurus 54 quasar 54 intrinsic brightness 54 Pleiades star 54 Pluto Charon 54 visible wavelengths 54 auroras 54 Cosmic Evolution 54 Comet Lulin 54 Fomalhaut b 54 nebulas 54 eclipsing binary 54 RS Ophiuchi 54 orbiting Hubble Space Telescope 54 gamma ray bursts 54 Gravitational waves 54 highly elliptical orbits 54 GRB #B 54 constellations Cygnus 54 afterglows 54 Triangulum Galaxy 54 constellation Sagittarius 53 exo planets 53 Noctilucent clouds 53 infrared wavelengths 53 HD #b [002] 53 earthshine 53 HD# [002] 53 RXTE 53 auroral 53 AKARI 53 Pleiades cluster 53 spectroscopic measurements 53 HM Cancri 53 Carina constellation 53 Orionids 53 lunar orbits 53 extrasolar 53 WASP #b 53 Ring Nebula 53 Orion constellation 53 ESO telescopes 53 SN #A 53 millisecond pulsars 53 Type Ia supernovae 53 filamentary structure 53 astrometry 53 comets asteroids 53 J# +# [002] 53 axions 53 Comet Halley 53 optical wavelengths 53 microlensing 53 Type Ia supernovas 53 dust enshrouded 53 SDSS II 53 substorms 53 Geminids 53 Perseids 53 Corot 9b 53 galaxy clusters 53 planet HD #b 53 radial velocity 53 X ray emission 53 Crab Nebula 53 gaseous planet 53 Hubble observations 53 submillimeter wavelengths 53 constellation Cygnus 53 planemos 53 gamma ray flares 53 Perseid meteors 53 VLTI 53 GALEX 52 microlensing events 52 hexagonal mirrors 52 planetary transits 52 pointings 52 planet orbiting 52 Spitzer infrared 52 celestial 52 celestial sphere 52 Geminid meteors 52 Antennae Galaxies 52 GJ #b [001] 52 solar flares 52 galaxy M# [001] 52 Coma Cluster 52 Andromeda galaxy 52 Delta Cephei 52 Comet Machholz 52 detect gamma rays 52 Virgo Cluster 52 constellation Hercules 52 Saturn aurora 52 gaseous planets 52 Anisotropy Probe WMAP 52 planetoids 52 SCP #F# 52 constellation Cassiopeia 52 exoplanet orbiting 52 galactic mergers 52 Upsilon Andromedae 52 photometer 52 amateur astronomers 52 elliptical galaxies 52 foreground galaxy 52 potentially habitable planets 52 VIRTIS 52 Amateur astronomers 52 faraway galaxies 52 ESO VLT 52 2MASS 52 occultation 52 star clusters nebulae 52 RRATs 52 Evolution Explorer 52 icy comets 52 auroral displays 52 Higgs bosons 52 KH #D 52 P/# A2 52 Jupiter Uranus 52 Herschel Space 52 Eta Carinae 52 Saturn Cassini 52 MG J# +# 52 magnetar 52 planetary Transits 52 Perseus Cluster 52 Lagoon Nebula 52 SN #gy 52 intracluster 52 infrared wavelength 52 red supergiants 52 VLBA 52 optical telescopes 52 exoplanet 52 spiral galaxies 52 Explorer WISE 52 supernova explosions 52 constellation Orion 52 Comet Hartley 2 52 redshift 52 gamma ray observatory 51 star Gliese 51 Corot 7b 51 jovian 51 moon Charon 51 ESO PR 51 ringed planet 51 habitable zones 51 photosphere 51 Earthshine 51 distant galaxy clusters 51 galaxy 51 moon Io 51 Solar TErrestrial RElations Observatory 51 Trapezium 51 asteroid Vesta 51 interacting galaxies 51 Jupiter Saturn 51 spiral nebulae 51 astrophysicists 51 coronal loops 51 proplyds 51 HIRES spectrometer 51 WISE infrared 51 colliding galaxies 51 STEREO spacecraft 51 photometric 51 TGFs 51 gamma ray burst 51 X ray pulses 51 LORRI 51 Milky Way galaxy 51 astrophysical objects 51 rocky planets 51 meteor showers 51 planetary conjunctions 51 extrasolar planets orbiting 51 UVOT 51 Quadrantid meteor shower 51 constellation Andromeda 51 asterism 51 Voorwerp 51 Stephan Quintet 51 meteors 51 comet nucleus 51 galaxy cluster 51 Gliese #c 51 Heliospheric Observatory SOHO 51 Leonids 51 constellation Perseus 51 Planck telescope 51 THEMIS satellites 51 Small Magellanic Cloud 51 gravitational microlensing 51 constellation Aquarius 51 blazar 51 constellation Virgo 51 La Silla Chile 51 Cosmic Microwave Background CMB 51 nebular 51 elliptical orbits 51 spectroscopic observations 51 airglow 51 Cygnus Lyra region 51 submillimetre 51 protostars 51 NASA Wilkinson Microwave 51 Pleiades 51 Henize #-# 51 arcminutes 51 Cassini 51 CRISM 51 ecliptic 51 circumstellar disks 51 protoplanetary disks 51 Astrophysical 51 spiral galaxy Messier 51 spiral galaxy NGC 51 WIMPs 51 X ray binary 51 planets comets 51 Monoceros 51 exoplanets planets outside 51 NASA Kepler 51 trans Neptunian objects 51 observatories 51 comet Hale Bopp 51 Orion nebula 50 CoRoT satellite 50 starburst galaxy 50 planetary nebula 50 OGLE TR #b 50 retrograde orbits 50 Kuiper Belt objects 50 binary asteroid 50 planet Gliese #g 50 Bug Nebula 50 supergiant stars 50 Nasa Kepler 50 HiRISE camera 50 Comet Hartley 50 transiting exoplanets 50 Diviner 50 habitable worlds 50 lensing galaxy 50 type Ia supernovae 50 geomagnetic storms 50 substorm 50 CoRoT #b 50 Milky Way 50 ray Space Telescope 50 magnetic reconnection 50 nebula 50 Astronomers 50 cosmological observations 50 globulars 50 diffuse aurora 50 Solar Dynamics Observatory 50 submillimeter galaxies 50 cosmic ray 50 astronomical observations 50 Cosmic rays 50 outer planets 50 cosmos 50 Proxima Centauri 50 celestial phenomena 50 Butterfly Nebula 50 Arches Cluster 50 Cat Paw Nebula 50 Earth magnetosphere 50 aurora 50 astronomical telescope 50 Extrasolar planets 50 ULP cepheids 50 microquasar 50 waxing gibbous moon 50 BP Psc 50 submillimetre wavelengths 50 galactic cosmic rays 50 Observatory SDO 50 zodiacal light 50 multiwavelength 50 planets asteroids 50 gamma ray emission 50 UDFy # 50 gravitational waves 50 XTE J# 50 innermost planet 50 planet Uranus 50 extrasolar worlds 50 Saturn moons 50 Saturnian moon Titan 50 telescope 50 moon Titan 50 Magnetars 50 planets astronomers 50 comet Lulin 50 asteroids 50 AU Mic 50 Astronomy 50 sun corona 50 eclipsing binaries 50 gravitational lens 50 Hipparcos 50 masers 50 comets orbiting 50 HUDF 50 SIRTF 50 Tarantula Nebula 50 Muchachos Observatory 50 orbits 50 CoRoT 50 moons 50 photometry 50 Jupiter moon Io 50 planetary nebulas 50 constellation Scorpius 49 Type Ia supernova 49 waxing crescent moon 49 Zeta Ophiuchi 49 Earths orbiting 49 comets 49 elongated orbits 49 sized planets orbiting 49 Geminid meteor shower 49 constellation Taurus 49 HiRISE image 49 Cassini flyby 49 IRAS #-# 49 cosmic particles 49 Helix Nebula 49 Spitzer Space Telescope 49 Coma Berenices 49 Type Ia 49 skywatching 49 Helix nebula 49 Mpc 49 galaxies nebulae 49 SOHO spacecraft 49 HiRISE camera aboard 49 cosmic rays 49 constellation Lyra 49 Galaxy Evolution 49 gravitational lensing 49 NASA Cassini spacecraft 49 terrestrial planets 49 extraterrestrial civilizations 49 Kuiper Belt Object 49 constellation Pegasus 49 Comet Elenin 49 magnetic monopoles 49 Comet NEAT 49 CoRoT 9b 49 Neptune Uranus 49 planet orbits 49 Gravitational lensing 49 starlight 49 WM Keck Observatory 49 Type 1a supernovae 49 Earthlike planet 49 galaxy M# [002] 49 Lyman alpha 49 Earth asteroids 49 GRB # 49 exoplanetary systems 49 Hubble Ultra 49 ESO Very Large Telescope 49 Solar System 49 SINFONI 49 luminosities 49 Cassini Huygens 49 Cosmic Microwave Background 49 detect gravitational waves 49 Slooh 49 gravitationally bound 49 observational astronomy 49 permanently shadowed craters 49 Gliese #d 49 Canes Venatici 49 Hale Bopp 49 Keck telescope 49 neutron stars 49 Kepler Space Telescope 49 Orionid 49 Beehive Cluster 49 Geminid 49 solar prominences 49 COROT exo 3b 49 supernova explosion 49 aboard ESA Envisat 49 Perseid meteor showers 49 Supernovae 49 X ray emitting 49 icy moons 49 Kuiper Belt object 49 super Earths 49 NEAs 49 Kepler #b 49 lunar craters 49 tholins 49 Saturn magnetosphere 49 GRB #A 49 F#W 49 constellation Carina 49 supermassive 49 Telescopes 49 NASA Cassini 49 energetic electrons 49 Planck satellite 49 gravitational wave 49 spectrographs 49 Wolf Rayet stars 49 chemical abundances 49 Cancri 49 telescopic observations 49 Fornax cluster 49 noctilucent 49 meteor shower 49 coronal mass ejections 49 constellation Eridanus 49 ionized hydrogen 48 ESA Planck 48 imaging spectrometer 48 occulted 48 distant suns 48 infrared ultraviolet 48 plutoids 48 asteroids orbiting 48 Pancam 48 Herschel telescope 48 Orionid meteor shower 48 auroral activity 48 astrometric 48 axial tilt 48 Solar Orbiter 48 gamma ray telescopes 48 Mimas 48 Leonid meteor showers 48 Geminga 48 dwarf galaxy 48 Carina Nebula 48 Higgs particle 48 interplanetary spacecraft 48 Saturn rings 48 asteroids comets 48 Leonid meteors 48 brown dwarf 48 Terrestrial Planet Finder 48 visit http:/saturn.jpl.nasa.gov 48 Konacki 48 millisecond pulsar 48 Jupiter moons 48 SpaceWeather.com 48 Upsilon Andromedae b 48 starbursts 48 orbiting observatories 48 moons Io 48 zodiac constellations 48 type 1a supernovae 48 orbiting Saturn 48 cosmic microwave background 48 ESO telescope 48 cosmological 48 starquakes 48 APXS 48 asteroseismology 48 outermost planets 48 gravitationally lensed 48 THEMIS 48 ecliptic plane 48 Gamma ray 48 electron neutrinos 48 galaxy NGC 48 Context Camera 48 Earthlike 48 Kepler spacecraft 48 Meteor showers 48 sodium atoms 48 Magellanic Clouds 48 Great Orion Nebula 48 Solar flares 48 planets atmospheres 48 red supergiant 48 SkyCenter 48 ROSAT 48 orbiting planets 48 mu Arae 48 gravity warps 48 Enceladus 48 X ray observatory 48 Eagle Nebula 48 spectral bands 48 prominences 48 Digitized Sky Survey 48 Venus transits 48 Mössbauer 48 spiral galaxy 48 Interstellar Boundary Explorer 48 Descent Imager Spectral Radiometer 48 optical interferometry 48 AAVSO 48 Swift Ultraviolet Optical 48 cluster NGC 48 X ray photons 48 telescopes astronomers 48 Lunar Reconnaissance Orbiter LRO 48 Comet McNaught 48 gravitational radiation 48 IceCube 48 Toutatis 48 globular star 48 Wilkinson Microwave Anisotropy Probe 48 VB #b 48 CMB radiation 48 Pan STARRS 48 dynamical evolution 48 spatial dimensions 48 phyllosilicates 48 galaxy redshift 48 Bok globules 48 SkyScout 48 frequency combs 48 planetary atmospheres 48 ultraviolet radiation emitted 48 constellation Aquila 48 CoRoT 7b 48 Chilean Atacama Desert 48 barred spiral galaxy 48 eccentric orbits 48 star Proxima Centauri 48 glowing orbs 48 Chandra X ray 48 X ray observatories 48 cosmic microwave radiation 48 radiometers 48 radial velocity technique 48 astronomy buffs 48 Coma cluster 48 Keck telescopes 48 HARPS spectrograph attached 48 globular cluster M# 48 WFC3 48 Martian meteorites 48 Wilkinson Microwave Probe 48 galactic clusters 48 GJ #b [002] 48 stellar occultations 48 Venusian atmosphere 48 Algol 48 mineralogical composition 47 Climate Experiment GRACE 47 Ultraviolet Imaging Spectrograph 47 Gliese #g 47 supersymmetric particles 47 Eta Aquarids 47 Omega Nebula 47 Doppler shifts 47 Saturn moon Enceladus 47 exo planet 47 celestial observations 47 Fermi Gamma ray 47 GQ Lupi 47 Milky Way halo 47 Elenin 47 coronal mass ejections CMEs 47 slender crescent 47 Mercury Uranus 47 Nasa spacecraft 47 Lulin 47 spectroscope 47 atmospheric phenomena 47 obscuration 47 Orbiter LRO 47 WMAP 47 celestial phenomenon 47 solar radii 47 auroral emissions 47 nebulosity 47 Spectrograph 47 Exoplanets 47 Hanny Voorwerp 47 Beta Pictoris 47 polar stratospheric 47 orbiting Chandra 47 Lunar Reconnaissance Orbiter Camera 47 CMEs 47 LOFAR 47 geostationary orbits 47 TNOs 47 Adaptive optics 47 interstellar boundary 47 ionised gas 47 interstellar cloud 47 baryon 47 submillimeter 47 Jupiter Saturn Uranus 47 Dennis Mammana 47 microshutters 47 cosmic cannibal 47 metallicity 47 radial velocity method 47 interstellar dust 47 spectroscopic 47 RHESSI 47 observable universe 47 periodic dimming 47 antineutrinos 47 wavelengths 47 Pluto Eris 47 antimatter particles 47 planets Uranus 47 nucleosynthesis 47 moons circling 47 galaxy formation 47 Kepler 9c 47 planets circling stars 47 proto galaxies 47 Composite Infrared Spectrometer 47 interferograms 47 HII regions 47 stargazers 47 moons Phobos 47 N. Rathnasree 47 SIM PlanetQuest 47 gravitational perturbations 47 NASA Far Ultraviolet 47 Oort cloud 47 ESA XMM Newton 47 submillimeter wavelength 47 subatomic particles 47 Orionid meteors 47 biosignatures 47 nebula NGC 47 dwarf planets 47 gamma rays 47 magnetospheric 47 Relations Observatory STEREO 47 waning gibbous 47 Sagittarius B2 47 elliptical galaxy 47 XMM Newton observations 47 Mars Orbiter Camera 47 interstellar medium 47 BepiColombo 47 Heterodyne Instrument 47 NASA Great Observatories 47 orbiting gamma ray 47 thrilling stargazers 47 Perseid shower 47 Convection Rotation 47 Elliptical galaxies 47 retrograde orbit 47 Io Europa 47 TrES 4 47 Hubble Space Telescope HST 47 orbiting telescope 47 WMAP satellite 47 Mars Color Imager 47 NASA STEREO 47 spatially resolved 47 constellation Puppis 47 Mauna Kea Hawaii 47 MESSENGER 47 southern constellation Carina 47 Saturn Enceladus 47 coronal holes 47 neutron star 47 celestial spectacle 47 supernovae explode 47 cosmological parameters 47 YU# 47 Perseus constellation 47 smallest exoplanet 47 comet 47 Veil Nebula 47 BLG #Lb 47 superheavy elements 47 radio occultation 47 Comet Tempel Tuttle 47 orbital inclination 47 Geminid shower 47 Planetary Transits 47 assumed planets circling 47 supersymmetry 47 celestial mechanics 47 Galactic Plane 47 skywatchers 47 spectra 47 Cepheid variable 47 particle detectors 47 spiral galaxy M# 47 supernova remnant 47 constellation Bootes 47 reflection nebula 47 spectrographic 47 Mini TES 47 habitable planet 47 HiRISE 47 spaceweather.com 47 spectral fingerprints 47 Astrophysicists 46 Spitzer infrared spectrograph 46 IBEX spacecraft 46 X ray binaries 46 HD# [005] 46 gamma ray emitting 46 NEOWISE 46 radiotelescope 46 optical telescope 46 Submillimeter 46 Saturnian system 46 galactic nuclei 46 interstellar clouds 46 constellation Leo 46 neutral mass spectrometer 46 inch Samuel Oschin 46 galactic halo 46 eclipse chasers 46 coronagraph 46 Pieter van Dokkum 46 NASA Kepler telescope 46 polar mesospheric clouds 46 ESA Integral 46 Telescope LSST 46 TrES 46 DISR 46 Trojan asteroids 46 Hot Jupiters 46 supermassive black holes 46 Trifid 46 hydrated minerals 46 moonlets 46 http:/www.nasa.gov/cassini 46 Cassini spacecraft 46 Charon Pluto 46 orbiting observatory 46 dwarf galaxies 46 infrared spectrometers 46 Solar Terrestrial Relations 46 lunar poles 46 journal Meteoritics 46 hot Jupiters 46 AUs 46 Interferometer VLTI 46 type Ia supernova 46 infrared spectra 46 stellar seismology 46 NASA ICESat 46 periodicities 46 Ulysses spacecraft 46 C1XS 46 particles WIMPs 46 Kepler Mission 46 Samuel Oschin Telescope 46 Saturnian 46 Aurigid 46 Saturnian moons 46 VISTA telescope 46 protostar 46 Cosmic Background Explorer 46 magnetotail 46 planet transits 46 Galileo spacecraft 46 NGC #A 46 elliptical galaxy NGC 46 orbiting 46 Kepler telescope 46 Submillimeter Array 46 infrared astronomy 46 Cassini Huygens spacecraft 46 magnetosphere 46 SUSY 46 lightning flashes 46 adaptive optics 46 galactic collisions 46 Galilean Nights 46 Gamma rays 46 outer corona 46 accretion disks 46 Very Large Telescope 46 AERONET 46 planetary surfaces 46 Lyrids 46 TW Hydrae 46 faraway planets 46 skygazers 46 #x# binoculars [001] 46 GJ#b 46 cosmologists 46 Mars Phobos 46 Laser Interferometer Gravitational Wave 46 alien civilizations 46 High Resolution Imaging 46 planet magnetosphere 46 interstellar molecules 46 star Spica 46 Active Galactic Nuclei 46 giant elliptical galaxy 46 Hubble orbits 46 spectroscopically 46 Keck Interferometer 46 V# Mon 46 Mario Livio 46 Paranal 46 COROT 7b 46 Lunar Reconnaissance Orbiter 46 Taurids 46 X ray afterglow 46 SPICAM 46 Comet Churyumov Gerasimenko 46 Canis Major 46 EPOXI spacecraft 46 squares triangles 46 galactic cores 46 planetary orbits 46 Optical Gravitational Lensing Experiment 46 moon Enceladus 46 Kuiper belt 46 Syrtis Major 46 Deep Field HUDF 46 Oort Cloud 46 Bose Einstein condensates 46 Perseids meteor shower 46 Gamma ray Large 46 ESO Paranal Observatory 46 Earth orbiting satellites 46 Gemini constellation 46 sidereal 46 inch refractor telescope 46 ENAs 46 asteroid Lutetia 46 Lunar Orbiter Laser Altimeter 46 dusty disks 46 Olympus Mons 46 Sombrero Galaxy 46 Iridium satellites 46 Corona Australis 46 SMBHs 46 moon Ganymede 46 geo stationary orbit 46 volcanic plumes 46 magnetospheres 45 thin crescent moon 45 Lyrid meteor shower 45 ionospheric 45 Rathnashree 45 Kuiper Belt 45 Large Magellanic Cloud 45 photons emitted 45 HARPS instrument 45 Imaging Spectroradiometer MODIS instrument 45 Gliese #e 45 baryons 45 Astronomy buffs 45 StarDate 45 lightwaves 45 GRB# 45 Delta Aquarids 45 Super Earths 45 galaxies quasars 45 Infrared Array Camera 45 ESA SMART 45 WISE spacecraft 45 JDEM 45 NASA THEMIS 45 Comet #P/Churyumov-Gerasimenko 45 spectral fingerprint 45 Exoplanet 45 galaxies collide 45 coronal loop 45 Eta Aquarid meteor shower 45 Supernova #A 45 e MERLIN 45 Betelgeuse 45 tidally locked 45 Neutron stars 45 HL Tau 45 supernova 45 Titan flyby 45 amateur astronomers peering 45 PSR J# 45 Hubble Space Telescope 45 protoplanet 45 gibbous moon 45 binary asteroids 45 spacecraft Cassini 45 sky gazers