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(Click for frequent words.) 73 volcanic moon Io 71 Galilean moons 70 planets Uranus 70 moons Io 70 gaseous planet 67 CoRoT #b 66 Mars Neptune Uranus 66 Uranus Neptune 66 Jupiter Ganymede 66 sized planets orbiting 65 Saturn Jupiter Uranus 65 moons Phobos 65 Zeta Ophiuchi 65 moons orbiting 65 telescope Uranus 64 comets orbiting 64 Galilean satellites 64 Fomalhaut b 64 moons Europa 64 icy moons 64 Upsilon Andromedae 64 Meen Rashi 63 protoplanet 63 Neptune Uranus 63 asteroids orbiting 63 moon Phobos 63 Io Europa 63 moons circling 62 moon Io 62 Venus Neptune Uranus 62 cosmic cannibal 62 Uranus Jupiter 62 Kuiper belt objects 62 orbits Saturn 62 TrES 4 62 planets orbits 62 Upsilon Andromedae b 62 Cygnus Lyra region 62 protoplanetary 62 star Spica 61 Bug Nebula 61 planet HD #b 61 supergiant star 61 constellation Hercules 61 red supergiant 61 gaseous planets 61 constellation Lyra 61 HD#b 61 Kepler 9c 61 Trojan asteroids 61 Pleiades cluster 61 starlike object 61 foreground galaxy 61 Corot 7b 61 Mars Jupiter Uranus 61 retrograde orbit 60 sunlike star 60 Mercury Uranus 60 Saturnian moon 60 Jovian moons 60 Jupiter Uranus 60 Mars Uranus 60 constellation Virgo 60 Neptune Jupiter 60 Kuiper belt object 60 galaxy M# [001] 60 zodiacal dust 60 OGLE TR #b 60 eccentric orbits 60 Andromeda galaxy 59 Kuiper Belt object 59 protoplanets 59 gibbous 59 constellation Andromeda 59 constellation Carina 59 HL Tau 59 constellation Ursa Major 59 GJ #b [002] 59 Europa Ganymede 59 proto cluster 59 moons Io Europa Ganymede 59 exoplanets orbiting 59 heavily cratered 59 GJ#b 59 Quaoar 59 Comet Holmes 59 Antiope 59 blue supergiant 59 Io Europa Ganymede 59 Beta Pictoris 59 Syrtis Major 59 cometary debris 59 Venus Jupiter Uranus 59 constellation Taurus 59 Saturn moons Enceladus 59 umbral shadow 59 Ring Nebula 59 Coma Cluster 59 whiz harmlessly 59 Samuel Oschin Telescope 59 largest moon Charon 59 galactic disk 58 Venus Uranus 58 Virgo Cluster 58 lensing galaxy 58 interstellar cloud 58 WASP #b 58 Jupiter Saturn 58 Kuiper belt 58 Jupiter Saturn Uranus 58 galaxy M# [002] 58 discover Fomalhaut 58 spherical halo 58 Oort cloud 58 Epsilon Eridani 58 zodiacal light 58 Pluto Eris 58 KBOs 58 MG J# +# 58 Epimetheus 58 Lagoon Nebula 58 Muchachos Observatory 58 waning crescent Moon 58 Epsilon Aurigae 58 Mars Uranus Neptune 58 emission nebula 58 protoplanetary disks 58 Saturn Enceladus 58 mu Arae 58 comets moons 58 circumstellar disks 58 planetary embryos 58 Saturn Cassini 58 Neutron stars 58 planet Uranus 57 globulars 57 COROT exo 3b 57 planets circling stars 57 Capricornus 57 galaxy NGC 57 slender crescent 57 Proxima Centauri 57 Pleiades star 57 exoplanet orbiting 57 Comet NEAT 57 Europa Orbiter 57 merging galaxies 57 Valles Marineris 57 Beta Pictoris b 57 planets moons 57 Omega Centauri 57 extrasolar 57 planets orbiting sun 57 HD #b [001] 57 star Beta Pictoris 57 retrograde orbits 57 Mars Saturn Uranus 57 moon Deimos 57 photosphere 57 elongated orbits 57 sunlike stars 57 AU Mic 57 exosphere 57 Virgo cluster 57 Charon Pluto 57 distant galaxy 57 Serpens Cauda 57 spiral galaxy NGC 57 orbited Jupiter 57 inhabitable planets 57 Extrasolar planets 57 Orion constellation 57 submillimetre wavelengths 57 Hellas Basin 57 Fornax cluster 57 constellation Gemini 57 BLG #Lb 56 moons 56 Comet Tempel Tuttle 56 moons orbiting Saturn 56 supermassive 56 Hot Jupiters 56 Kuiper Belt Objects 56 lunar crust 56 Modeen Funeral Home 56 star Fomalhaut 56 inner moons 56 planets asteroids 56 gravitationally bound 56 Milky Way galaxy 56 Venusian atmosphere 56 thin crescent 56 spiral nebulae 56 Astrological lore 56 Iapetus Saturn 56 Phoebe orbits 56 double helix nebula 56 Saturn Uranus 56 supergiant stars 56 constellation Auriga 56 Jupiter moon Io 56 Coma cluster 56 galactic halo 56 silicate dust 56 elliptical galaxy 56 Pluto Charon 56 Kuiper Belt Object 56 Orion nebula 56 solar nebula 56 celestial sphere 56 starlike 56 X ray wavelengths 56 IRAS #-# 56 waning gibbous 56 Fermi telescope 56 Bok globules 56 gravitational interactions 56 galaxy 56 Milky Way Galaxy 56 moon Charon 56 Triangulum 56 gravitational interaction 56 waning crescent moon 56 brightest supernova 56 outer planets 56 X ray binary 56 Oort Cloud 56 GQ Lupi 56 PASADENA Calif. Astronomers 56 Pluto Uranus 56 Geminga 56 fainter objects 56 Saturnian system 56 Tarantula nebula 56 trans Neptunian objects 56 Hanny Voorwerp 56 Ringed Planet 56 Asteroid Belt 56 Arches Cluster 55 planemos 55 constellation Cetus 55 Neptune Uranus Jupiter 55 penumbral shadow 55 submillimeter galaxies 55 planet orbiting 55 star Gliese 55 planet orbits 55 galactic clusters 55 jovian 55 Dhanu Rashi 55 interstellar dust particles 55 Comet Shoemaker Levy 55 reflection nebula 55 Carina Nebula 55 Martian moons Phobos 55 super perigee moon 55 Great Orion Nebula 55 luminous galaxies 55 gamma ray observatory 55 constellation Eridanus 55 RX J# 55 occulted 55 gravitational tides 55 elliptical galaxy NGC 55 SN #D 55 Saturnian moons 55 constellation Pegasus 55 stellar nurseries 55 constellation Cassiopeia 55 nebulae 55 accretion disks 55 Comet #P 55 waxing crescent 55 BP Piscium 55 Galileo spacecraft 55 constellation Vulpecula 55 comet 55 starburst galaxy 55 exoplanetary 55 faraway galaxies 55 planet WASP #b 55 waxing gibbous moon 55 gravitational perturbations 55 aphelion 55 Dhanu Rashi Mars 55 umbral 55 Candor Chasma 55 constellation Aquarius 55 moon Europa 55 Carina constellation 55 innermost planet 55 planetoids 55 Stephan Quintet 55 HD #b [002] 55 active galactic nuclei 55 constellation Cygnus 55 KH #D 55 subsurface ocean 55 magnetotail 55 magnetars 55 barred spiral galaxy 55 moon Mimas 55 Comet Machholz 55 comet Tempel Tuttle 55 constellation Libra 55 constellation Scorpius 55 moonlet 55 outermost planet 55 Helix nebula 55 zodiacal constellations 55 Saturn magnetosphere 55 unaided eye 55 P/# A2 55 protoplanetary disk 55 moon Titan 55 smallest exoplanets 55 thrilling stargazers 55 Mandushev 55 Orionid meteors 54 IntergalaticEarth 54 aspecting 54 interstellar dust 54 Evolution Explorer 54 asteroid Vesta 54 Spiral galaxies 54 ESA XMM Newton 54 volcano Olympus Mons 54 elliptical orbits 54 millisecond pulsars 54 Andromeda Galaxy 54 nebulas 54 waxing crescent moon 54 outer corona 54 Uranus 54 distant quasar 54 Saturn outermost 54 proplyds 54 periodic dimming 54 rocky planets 54 Makemake 54 constellation Sagittarius 54 colliding galaxies 54 bedrock outcropping 54 circumstellar 54 Cancri e 54 Rosette Nebula 54 planets comets 54 Infrared Array Camera 54 exo planets 54 moon Mab 54 nebular 54 icy moon Enceladus 54 Cassini flyby 54 Dumbbell Nebula 54 magma ocean 54 moon Dione 54 YOUR HOROSCOPE 54 transiting planet 54 Gamma ray bursts 54 waning gibbous moon 54 Small Magellanic Cloud 54 Sombrero Galaxy 54 smoothest flattest spot 54 X ray emission 54 spiral galaxy 54 Perseus Cluster 54 Milky Way 54 solar corona 54 meteoroids 54 Eagle Nebula 54 tidal bulge 54 COROT 7b 54 transiting planets 54 Saturn moons 54 Wolf Rayet star 54 Earthlike planets 54 Explorer WISE 54 joins rovers Spirit 54 rotating neutron 54 planets 54 circular orbits 54 constellation Centaurus 54 gibbous moon 54 Hale Bopp 54 Caloris 54 comet nucleus 54 constellation Aquila 54 circumstellar disk 54 supernovae explode 54 plutoids 54 Ian McShane Pillars 54 baryonic matter 54 Milky Way halo 54 Nasa spacecraft 54 elongated orbit 54 supernova explosion 54 orbiting 54 Wolf Rayet stars 54 planetesimals 54 moon Enceladus 54 Comet Hartley 2 54 scarps indicating 54 Saturn rings 54 interacting galaxies 54 Kuiper Belt objects 54 planetary Transits 54 super Earths 54 choking irritants 53 McDonald Aeberli Funeral Home 53 ejecta 53 Orion Nebula 53 Comet Halley 53 Sagittarius Ketu 53 planetoid 53 galaxies collide 53 asteroid belt 53 terrestrial planets 53 star Proxima Centauri 53 dirty snowballs 53 Beehive Cluster 53 galaxy cluster 53 constellation Leo 53 ecliptic plane 53 slender crescent moon 53 Iapetus 53 Canis Major 53 northern arctic plains 53 Hyakutake 53 zodiac constellations 53 Fashion Movie Reviews 53 HD# [002] 53 Cancri 53 Methone 53 impactors 53 distant quasars 53 Sagittarius B2 53 hunting Kepler telescope 53 Eridanus 53 protostars 53 Trifid 53 silicate mantle 53 HARPS instrument 53 extrasolar planet HD #b 53 Shoemaker Levy 53 XO 3b 53 extrasolar planetary systems 53 mysterious uncharted 53 exoplanets planets 53 redshifted 53 giant gaseous planets 53 dynamical evolution 53 constellation Orion 53 prograde 53 Valles Marineris canyon 53 X ray binaries 53 rotational axis 53 cosmological distances 53 SMBH 53 airglow 53 distant supernovae 53 WMAP satellite 53 submillimetre 53 supernova remnants 53 stellar occultation 53 cluster NGC 53 planetary nebulas 53 lunar occultation 53 orbital resonance 53 giant elliptical galaxy 53 Puppis 53 proto planetary disks 53 accretion disk 53 occultations 53 galaxies 53 Magellanic Clouds 53 galaxy clusters 53 silicon monoxide 53 magnetic dynamo 53 asteroids comets 53 outermost planets 53 SN #A 53 zodiacal constellation 53 Taurids 53 Betelgeuse 53 Libra adore 53 Saturn Neptune Uranus 53 orbits 53 asteroidal 53 habitable zones 53 nebula 53 protoplanetary disc 53 Galaxy Evolution 53 Herschel Space 53 SKY WATCH 53 HiRISE camera aboard 53 millisecond pulsar 53 Jovian moon 53 exo planet 53 Comet Lulin 53 rotating neutron stars 53 ionized particles 53 hot Jupiters 53 Gliese #c 53 comets asteroids 53 spiral galaxies 53 Mimas 53 spacecraft flyby 53 emit X rays 53 gravitational tugs 53 crescent Moon 53 Solar TErrestrial RElations Observatory 53 Toutatis 53 Ranging spacecraft 53 filamentary structure 53 Trapezium 53 SN #C 53 dust mote 53 Cosmic Microwave Background 53 Comet Elenin 53 Quadrantid meteor shower 53 galactic mergers 53 Beta Centauri 53 ringed planet 52 orbital eccentricity 52 highly magnetized neutron 52 Magnetars 52 PUVA psoralen plus 52 spinning neutron stars 52 Uranian 52 magnetar 52 Solar System 52 Comet Churyumov Gerasimenko 52 waning crescent 52 frozen sunless 52 Gerhard Schwehm 52 Canis Minor 52 spherically symmetric 52 gravitational microlensing 52 galaxy Andromeda 52 rayed crater 52 star clusters nebulae 52 Saturn moon Mimas 52 Geminid meteors 52 galactic cosmic rays 52 ultraviolet wavelengths 52 gravitational lenses 52 Cat Paw Nebula 52 planetary nebulae 52 optical telescopes 52 CoRoT 7b 52 Saturn Uranus Neptune 52 mineral olivine 52 Tarantula Nebula 52 planetary nebula 52 spinning neutron 52 constellation Puppis 52 Taurus Littrow Valley 52 proto galaxies 52 V# Mon 52 supernova explosions 52 Eridani 52 observable universe 52 AB Aurigae 52 Gravitational waves 52 asterism 52 constellation Pisces 52 found circling Gliese 52 Kepler #b 52 Giovanni Cassini 52 infrared telescopes 52 Wilkinson Microwave Probe 52 galactic cores 52 oblate spheroid 52 Manned missions 52 van Arkel discovery 52 Eta Carinae 52 planet transits 52 XTE J# 52 Horsehead Nebula 52 Jupiter 52 Corona Borealis 52 Terra Meridiani 52 coronal mass ejections CMEs 52 X ray observatory 52 THEMIS Image 52 chromosphere 52 Olympus Mons 52 neutron star 52 telescopic observations 52 constellation Serpens 52 planet magnetosphere 52 rover Spirit landed 52 globular cluster 52 sextile 52 gravitational pulls 52 tholins 52 red supergiants 52 accreting 52 Earth magnetosphere 52 VY Canis Majoris 52 celestial object 52 Veil Nebula 52 elliptical galaxies 52 highly elliptical orbit 52 called gravitational microlensing 52 CoRoT 9b 52 Dwarf galaxies 52 Astronomical Units 52 Lyrids 52 radial velocity technique 52 Earth radii 52 lunar perigee 52 comet Lulin 52 amateur astronomers peering 52 galaxy NGC# 52 GALEX 52 permanently shadowed craters 52 Ionosphere Sounding 52 arcseconds 52 tall cupola beholding 52 constellation Aries 52 Neptunian 52 cosmic magnifying glass 52 protostar 52 Viking orbiters 52 HM Cancri 52 cratered highlands 52 CMB radiation 52 AGNs 52 Monoceros 52 albedo reflectivity 52 Scientists theorized 52 Relations Observatory STEREO 52 #P/Churyumov-Gerasimenko 52 inch Samuel Oschin 52 gravitationally 52 TrES 52 Martians invading 52 spiral galaxy Messier 52 distant galaxies 52 authors Anne Verbiscer 52 polarimetry 52 Aquarius adore 52 constellation Lacerta 52 proto planetary disk 52 Cassini spacecraft orbiting 52 Caloris Basin 52 luminosities 51 planets orbiting stars 51 Sagittarius dwarf galaxy 51 umbra 51 coronal loops 51 dwarf galaxy 51 southern supercontinent 51 quasars 51 Venusian 51 brightest meteors 51 supervolcanoes 51 arcminutes 51 lunar equator 51 Lightning flickered 51 constellations Cygnus 51 NGC# 51 infrared wavelengths 51 multiband imaging photometer 51 relativistic particles 51 tidally locked 51 Maunder minimum 51 globular star 51 Gliese #e 51 retroreflector 51 predawn sky 51 HIP #b 51 Ganymede 51 penumbral eclipse 51 Comet 9P/Tempel 1 51 Earthlike 51 Transiting 51 neighboring Andromeda galaxy 51 Adam Riess 51 reionization 51 Terra Sirenum 51 thin crescent moon 51 VIRTIS instrument 51 stellar occultations 51 geysers erupting 51 magnetospheric 51 Comet LINEAR 51 Churyumov Gerasimenko 51 Jupiter moons 51 Jupiter icy moons 51 Wolszczan 51 Descent Imager Spectral Radiometer 51 Hyades cluster 51 Orionids 51 reentry capsule 51 spiral galaxy M# 51 dimming starlight 51 smoggy atmosphere 51 lunar eclipse occurs 51 Gliese #G 51 HAT P 51 eclipsing binary 51 Planck satellite 51 rocky terrestrial planets 51 earthshine 51 telescope eyepiece 51 Haumea 51 planet gravitational tug 51 axis wobbles 51 celestial equator 51 perihelion 51 Quadrantids 51 asteroids Vesta 51 martian atmosphere 51 Virginis 51 Helix Nebula 51 Pluto moon Charon 51 Antennae Galaxies 51 Sojourner rover 51 planets orbiting distant 51 polar orbits 51 interstellar particles 51 Elenin 51 spacecraft orbited 51 Noctilucent clouds 51 icy comets 51 quasar 51 Perseus constellation 51 Trifid Nebula 51 Encke gap 51 submillimeter wavelengths 51 Voyager spacecraft flew 51 Sedna 51 X ray emitting 51 Scorpio adore 51 fist widths 51 PSR J# 51 moon Canup 51 astronomer Clyde Tombaugh 51 Coma Berenices 51 Virgo adore 51 JPL manages 51 polar vortex 51 hydrogen helium 51 Jupiter magnetosphere 51 Konacki 51 spacecraft Cassini 51 fainter 51 planets orbiting 51 Mars moon Phobos 51 globular clusters 51 giant elliptical galaxies 51 Fomalhaut 51 Infrared Thermal Imaging Spectrometer 51 Titan Saturn 51 Globular clusters 51 MARSIS instrument 51 faint smudge 51 synchronous orbit 51 Tempel Tuttle 51 shadowy craters 51 supernovae explosions 51 Arabia Terra 51 Climate Sounder 51 twin moons Phobos 51 Saturnian 51 Spitzer Space Telescope 51 twin suns 51 extrasolar planets 51 dusty disks 51 planetary conjunctions 51 comet McNaught 51 dwarf spheroidal 51 planetary orbits 51 Tharsis Rise 51 extragalactic 51 Canes Venatici 50 Reconnaissance Orbiter 50 Gravitational lensing 50 Planetary Transits 50 Corona Australis 50 SMBHs 50 moons JAXA 50 VB #b 50 Ontario Lacus 50 GJ #b [001] 50 transiting exoplanet 50 properties rheology 50 closest flyby 50 sun corona 50 waxing gibbous 50 Type 1a supernova 50 X ray observatories 50 diffuse aurora 50 extrasolar planets orbiting 50 planetesimal 50 thunderstorms loomed 50 Plutoids 50 asteroid Ceres 50 Cepheus 50 gravity warps 50 active galactic nucleus 50 cometary impacts 50 interstellar dust grains 50 ASTROLOGICAL TOPICS 50 nicknamed Xena 50 planet Nibiru 50 glows brightly 50 smallest exoplanet 50 NASA rovers Spirit 50 Cassini flybys 50 ultraluminous galaxy 50 look distractingly cartoony 50 heliospheric 50 interstellar clouds 50 Multi Object Spectrograph 50 Pisces adore 50 S/# P2 50 SN#A 50 Tycho Brahe observatory 50 constellation Monoceros 50 chondrites 50 dustier stormier atmosphere 50 Lulin 50 HUDF 50 Jupiter gravitational pull 50 Titan smoggy 50 interplanetary spacecraft 50 axial tilt 50 Jupiter moons Europa 50 planets constellations 50 infrared telescope 50 dwarf galaxies 50 superdense neutron star 50 Astronomers Find 50 buckypaper virtually 50 electrons positrons 50 Saturn moons Titan 50 Martian equator 50 Lutetia 50 BP Psc 50 constellation Ara 50 geyser plumes 50 inner asteroid belt 50 WISE telescope 50 Galactic cosmic rays 50 TSN PZ camera 50 impactor spacecraft 50 PSR B# +# 50 NASA orbiters circling 50 Today waxing Virgo 50 frigid arctic plains 50 Cosmic Background Explorer 50 Exoplanets 50 dense clumps 50 Hubble orbits 50 ESO VLT 50 moonlets 50 circumstellar dust 50 Nikku Madhusudhan 50 Crab Nebula 50 magnetosphere 50 distant suns 50 AUs 50 radial velocity 50 Svedhem 50 Garan rode 50 ionized gas 50 dubbed Dodo Goldilocks 50 Opportunity parachuted 50 blazar 50 Greenhouse gases trap 50 celestial 50 Pluto dwarf 50 nebula NGC 50 astronomers 50 planetary 50 XMM Newton satellite 50 Comet McNaught 50 orbiting telescopes 50 Chilean Atacama Desert 50 Suzaku X ray 50 equatorial bulge 50 microquasar 50 Palaeozoic sedimentary 50 particle analyzers 50 Aries adore 50 Triangulum Galaxy 50 Mercury Jupiter Uranus 50 WISE spacecraft 50 abyssal plain 50 comets 50 Red Rectangle 50 Surface Composition Spectrometer 50 Spitzer infrared 50 gaseous envelope 50 Comet #P/Churyumov-Gerasimenko 50 cosmos 50 winged messenger 50 Herbig Ae Be 50 Vourlidas 50 Meteor showers 50 energetic electrons 50 highly elliptical orbits 50 Jimi Hendrix Valleys 50 polar craters 50 Astronomy buffs 50 extrasolar worlds 50 electron orbits 50 Extrasolar 50 X ray telescopes 50 volcanic craters 50 constellation Coma Berenices 50 assumed planets circling 50 cousin Makayla Sitton 50 X ray afterglow 50 RS Ophiuchi 50 telescopes 50 blue straggler 50 planet Gliese #g 50 rocky extrasolar planet 50 Corot 9b 50 Crab Pulsar 50 outermost layers 50 cosmic microwave background 50 Caltech manages 49 Roque de los 49 Kuiper Belt 49 Lyrid meteor shower 49 ionized hydrogen 49 Cassini Image 49 asteroid flyby 49 Heliospheric Observatory 49 universe 49 supernovas 49 visible wavelengths 49 Kepler 9b 49 Eta Carina 49 supernova remnant 49 Saturn moon 49 #gy 49 detect gravitational waves 49 HiRISE image 49 ah dus 49 Niclas Henricson head 49 Neutron Spectrometer 49 cosmic microwave radiation 49 HIRES spectrometer 49 constellation Ophiuchus 49 inner Oort Cloud 49 water hypothesizes Stephane 49 extrasolar planet 49 Greenbelt Md. manages 49 olivine crystals 49 silicate grains 49 nebulas clouds 49 filamentary 49 solar prominences 49 constellation Draco 49 meteoroid 49 HARPS spectrograph attached 49 supernova 49 Olive ridleys 49 spacecraft orbiting 49 wow Fincke 49 Solar flares 49 SNR #-#.# 49 mountaintop hideaway near 49 Mercury magnetosphere 49 steerable radio 49 GA6 49 orbiting Chandra 49 Comet Tempel 1 49 Earth Connection Coronal 49 Follett Pillars 49 orbiting Saturn 49 comet Churyumov Gerasimenko 49 comet Shoemaker Levy 49 Gamma rays 49 Cassini Finds 49 synchronous polar 49 CoRoT satellite 49 COROT 49 eyepiece #/#s f/#.# 49 Thick smoke obscured 49 smallest extrasolar planet 49 twin Voyager spacecraft 49 Spitzer Space Telescopes 49 helium nuclei 49 repeated fly bys 49 SIRTF 49 lobate scarps 49 astronomical objects 49 Gondolo 49 tidal tails 49 coronagraph 49 lithosphere 49 aurorae