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(Click for frequent words.) 62 Uranian 61 Saturn Cassini 60 planet Uranus 60 Saturnian 59 Uranus 59 moons Phobos 59 Cassini flyby 59 retrograde orbit 58 occultations 57 Upsilon Andromedae 57 Churyumov Gerasimenko 57 Uranus Neptune 57 Galilean moons 57 Jovian moons 57 Martian 57 cometary debris 57 coronal loops 57 Toutatis 56 Comet Halley 56 sextile 56 sidereal 56 Gliese #c 56 zodiacal constellations 56 planets orbits 56 Saturn Enceladus 55 Comet Hartley 2 55 exoplanetary 55 Jupiter moons 55 planets Uranus 55 Quadrantids 55 extrasolar 55 Kepler 9c 55 gibbous 55 Saturn moon Iapetus 55 outermost planets 54 Kuiper belt objects 54 moon Io 54 orbited Jupiter 54 comets meteors 54 Solar TErrestrial RElations Observatory 54 waning crescent Moon 54 gravitational perturbations 54 HD#b 54 albedo reflectivity 54 axial tilt 54 Corot 7b 54 jovian 54 planetoid 54 prograde 54 Kuiper Belt Object 54 WASP #b 54 Hale Bopp 53 retrogrades 53 martian 53 moons circling 53 Jupiter icy moons 53 Sromovsky 53 orbital eccentricity 53 CoRoT 9b 53 icy moons 53 Flyby 53 slender crescent 53 Cancri e 53 zodiac constellations 53 Ganymede 53 Venus 53 planet WASP #b 53 perihelion 53 Orionids 53 elongated orbits 53 Ring Nebula 53 sized planets orbiting 53 Saturnian moon 53 Jupiter Saturn 53 gibbous moon 53 outer planets 53 celestial sphere 53 Exoplanet 52 Saturn Uranus 52 Kuiper Belt object 52 orbital resonance 52 COROT 7b 52 mu Arae 52 comets orbiting 52 Neptunian 52 magnetic polarity 52 planetary transits 52 outerspace 52 OGLE TR #b 52 photosphere 52 Io Europa 52 planets 52 cosmos 52 noctilucent clouds 52 Halley comet 52 terra forming 52 Colonizing 52 HD #b [001] 52 Neptune Uranus 52 asteroidal 52 Noctilucent clouds 52 OGLE TR 52 Cydonia region 52 NASA Cassini 52 equatorial latitudes 52 Nibiru 52 innermost planet 52 comets asteroids 52 Saturnian moon Titan 52 P/# A2 52 spacecraft flyby 52 planets moons 52 moons orbiting 52 comet 52 Crab Nebula 52 moons 52 gravitational anomalies 52 Gliese #d 52 airglow 52 sunlike stars 51 Mars 51 Comet Hartley 51 Nasa spacecraft 51 mystical realm 51 Jenniskens 51 moon Ganymede 51 Pluto Charon 51 constellation Aquarius 51 alien beings 51 orbital inclination 51 Extrasolar 51 Kuiper Belt Objects 51 Epsilon Eridani 51 stellar occultations 51 Magnetars 51 celestial phenomena 51 Cancerian 51 Comet Lulin 51 Andromeda Galaxy 51 GQ Lupi 51 Sagittarian 51 Ultraviolet Imaging Spectrograph UVIS 51 moon Deimos 51 Aurigid 51 sunward 51 binary asteroid 51 zodiacal dust 51 planetary 51 retrograde orbits 51 planetary Transits 51 Relations Observatory STEREO 51 Astronomically 51 Quadrantid meteor shower 51 exoplanets orbiting 51 Fomalhaut b 51 planetary alignments 51 planet orbits 51 axis wobbles 51 Venusian atmosphere 51 Transiting 51 CoRoT 51 Oort Cloud 51 constellation Leo 51 HD #b [002] 51 telescopic observations 51 Jovian moon 51 distant supernovae 51 comet Tempel Tuttle 51 waning gibbous 51 VY Canis Majoris 51 Jupiter moon Io 51 Jupiter Uranus 51 planetary orbits 51 Earth 51 galaxy M# [001] 51 extrasolar planetary systems 51 Super Earths 50 magnetic substorms 50 Galilean satellites 50 planetoids 50 lunar perigee 50 CoRoT 7b 50 Comet Holmes 50 magnetospheric 50 earths 50 Piscean 50 Gerard Kuiper 50 zodiacal light 50 substorm 50 Orion nebula 50 planetary nebulas 50 celestial equator 50 TrES 4 50 Taurids 50 Helix nebula 50 occulted 50 Giovanni Cassini 50 lunar equator 50 orbits 50 Plutonian 50 Cassini 50 Pleiades star 50 Emily Lakdawalla 50 Hot Jupiters 50 Earthshine 50 Vourlidas 50 Martian dust 50 galactic cosmic rays 50 Halley Comet 50 Helix Nebula 50 Albedo 50 Zeta Ophiuchi 50 Proxima Centauri 50 cosmic cannibal 50 Cometary 50 astral plane 50 Geminid 50 Gaensler 50 Antiope 50 Extrasolar Planets 50 Upsilon Andromedae b 50 Mars Phobos 50 Titan flyby 50 Tau Ceti 50 Exoplanets 50 homeworld 50 GJ #b [002] 50 Cosmic Microwave Background 50 hubble 50 astral 50 constellation Hercules 50 extrasolar worlds 50 rocky extrasolar planet 50 J'onn 50 Planck satellite 50 ESA Herschel 50 smallest exoplanet 50 Eta Aquarid meteor shower 50 Carina constellation 49 circular orbits 49 irregularly shaped asteroid 49 Terrians 49 asterism 49 protoplanet 49 Saturnian moons 49 cosmic collisions 49 star Spica 49 aspecting 49 interplanetary spacecraft 49 conjunct 49 Aries Taurus 49 ringed planet 49 Comet Machholz 49 cosmic phenomena 49 Epimetheus 49 comet hurtling 49 Mars Uranus 49 antarctic 49 galactic alignment 49 Cepheus 49 Tycho Brahe 49 Uranus Jupiter 49 Astrophysical 49 planet 49 zodiacal 49 sunspot cycle 49 malefic 49 Mercury Uranus 49 reptilians 49 BLG #Lb 49 Plait 49 earthshine 49 Epsilon Aurigae 49 comet Lulin 49 Muchachos Observatory 49 Pleiades cluster 49 Martian rovers 49 hydrostatic equilibrium 49 exoplanet orbiting 49 celestial bodies 49 asteroid Vesta 49 exo planet 49 polar vortex 49 BP Piscium 49 astronomical phenomena 49 Geminga 49 supergiant star 49 Corot 9b 49 inhabitable planets 49 #P/Holmes 49 COROT 49 gaseous planet 49 gamma ray observatory 49 Earths 49 Manned missions 49 polar mesospheric clouds 49 Yarkovsky effect 49 trine 49 Mercury retrograde 49 waxing crescent moon 49 Ulysses spacecraft 49 SKY WATCH 49 Evolution Explorer 49 Kepler 9b 49 Red Planet 49 Norrin Radd 49 Geminids meteor shower 49 colonize Mars 49 interstellar 49 alien civilizations 49 planet Gallifrey 49 ghostly glow 49 reptilian aliens 49 moon Mimas 49 ecliptic plane 49 circumstellar disks 49 icy moon Enceladus 49 GA6 49 Gravitational lensing 49 Saturn equinox 49 humanoid aliens 49 Full Moons 49 dwarf spheroidal 49 Horsehead Nebula 49 Sunspots 49 Earth radii 49 inter galactic 49 Oscillations 49 Henize #-# 49 HiRISE camera aboard 49 Wolf Rayet stars 49 interplanetary 48 Leonid shower 48 Saturn outermost moon 48 Plate Tectonics 48 Pluto Eris 48 Pisceans 48 NASA satellites orbiting 48 Cosmonaut Yuri Gagarin 48 Earthlike planets 48 substorms 48 moon 48 waxing crescent 48 Aqua satellite 48 #P/Churyumov-Gerasimenko 48 heroine Samus Aran 48 constellation Taurus 48 Red Rectangle 48 gravitational pulls 48 extraterrestial 48 Rossby waves 48 Comet 9P/Tempel 1 48 radial velocity 48 Homo Sapien 48 solar minima 48 Tempel Tuttle 48 V# Mon 48 Syrtis Major 48 APXS 48 Andromeda galaxy 48 Vakoch 48 Eridanus 48 accretion disks 48 Crab pulsar 48 extraterrestrial civilizations 48 Cepheid variables 48 Comet #P/Churyumov-Gerasimenko 48 Martians invading 48 STEREO spacecraft 48 celestial 48 astrometry 48 intergalactic 48 Klaatu Keanu Reeves 48 Apokolips 48 Lutetia 48 Iapetus 48 SIM PlanetQuest 48 nightside 48 Jupiter magnetosphere 48 Cassini flybys 48 tow dollies 48 NASA STEREO 48 constellation Serpens 48 Enceladus 48 Sagittarius 48 Giovanni Schiaparelli 48 CoRoT satellite 48 sundog 48 Viking orbiters 48 Neukum 48 exosphere 48 Puppis 48 Kuiper belt 48 YOUR HOROSCOPE 48 Tunguska meteorite 48 solar prominences 48 nightglow 48 quantum particles 48 Neil deGrasse Tyson 48 proplyds 48 moon Charon 48 Eridani 48 Svedhem 48 meridional flow 48 Earthlike planet 48 earthling 48 Algol 48 elliptical orbits 48 tropical latitudes 48 constellation Draco 48 magnetotail 48 Comet Elenin 48 celestials 48 comet Churyumov Gerasimenko 48 Martian moons Phobos 48 eclipsing binary 48 earthlike 48 planetary conjunctions 48 KBOs 48 de Pater 48 Triangulum 48 Heliospheric Observatory SOHO 48 Teleportation 48 Methone 48 hadron 48 Taureans 48 Leonid Meteor Shower 48 ecliptic 48 galactic 48 Comet NEAT 48 Mandushev 48 Venus Climate Orbiter 48 planets comets 48 Capricornus 48 comet orbit 48 Delta Cephei 48 Saturn rings 48 Infrared Thermal Imaging Spectrometer 48 cosmological distances 48 Saturnine 48 interstellar cloud 48 Earthlike 48 waning gibbous moon 48 Dikpati 48 interstellar particles 48 Yinghuo 1 48 constellation Pegasus 48 cometary impacts 48 moonquakes 48 cosmic 48 asteroid flyby 48 galactic disk 48 heavily cratered 48 spaceweather.com 48 Milankovitch cycles 48 Phaethon 48 orbiting 48 red supergiant 48 Antarctic icecap 48 constellation Lyra 48 Coma Berenices 48 NASA EPOXI mission 48 whiz harmlessly 48 Shoemaker Levy 48 astronomer Johannes Kepler 48 KH #D 48 Quaoar 48 Lunar eclipse 47 Perseid shower 47 Sibeck 47 radio occultation 47 Manhattanhenge 47 flyby Cassini 47 GJ #b [001] 47 Gungans 47 constellation Centaurus 47 Comet Encke 47 gravitational keyhole 47 Konacki 47 Alpha Centauri 47 Sagittarius B2 47 lowermost mantle 47 Neptune Jupiter 47 Titan smoggy 47 Cancerians 47 equinoxes 47 Cassini Huygens spacecraft 47 supervolcanoes 47 aurorae 47 Venusians 47 microquasar 47 moonbase 47 waxing gibbous moon 47 Beehive Cluster 47 Apophis asteroid 47 Sombrero Galaxy 47 faraway planets 47 alien lifeform 47 spatially resolved 47 Saturn moon 47 Kuiper belt object 47 Swift Tuttle 47 Martian terrain 47 Dwarf Planet 47 Oort cloud 47 Beta Pictoris b 47 Jupiter flyby 47 planetary surfaces 47 Rosetta spacecraft 47 cosmic ray flux 47 Saturn moon Mimas 47 imaging spectrometer 47 Andorians 47 extraterrestrial UFOs 47 Voyager spacecraft 47 Neutron Spectrometer 47 Extrasolar planets 47 geyser plumes 47 Antarctic Dry Valleys 47 constellation Scorpius 47 Mercury magnetosphere 47 auroral activity 47 Omega Nebula 47 AB Aurigae 47 Gliese #e 47 spacecraft Cassini 47 ESA Cluster 47 Huygens descent 47 GALEX 47 Mössbauer 47 faraway galaxy 47 solar corona 47 moon gravitational pull 47 highly elliptical orbits 47 neutralinos 47 lunar 47 terraforming Mars 47 Curiosity rover 47 Jupiter Ganymede 47 Makemake 47 Saturn Moons 47 magnetic monopoles 47 Galileo spacecraft 47 auroral displays 47 Orion constellation 47 planemos 47 astrophysical objects 47 SIOUX CENTER Iowa KTIV 47 moon Enceladus 47 Clyde Tombaugh discovered 47 Deimos 47 planet Gliese #c 47 Maunder minimum 47 constellation Pisces 47 SN #A 47 Percival Lowell 47 Fossae 47 Hubble orbits 47 prominences 47 elongated orbit 47 SuperMoon 47 constellation Ursa Major 47 Meteor Shower 47 robotic explorer 47 Homunculus 47 Mars moon Phobos 47 sun corona 47 ultraviolet wavelengths 47 asteroids comets 47 Sedna 47 eccentric orbits 47 transiting exoplanet 47 BepiColombo 47 gravitation 47 quincunx 47 galaxy 47 synchronous polar 47 thin crescent 47 synchronous orbit 47 Ringworld 47 NASA rovers Spirit 47 LADEE 47 planet Gliese #g 47 Wolszczan 47 solar nebula 47 aeon 47 constellation Sagittarius 47 Kleopatra 47 trans Neptunian objects 47 Bug Nebula 47 Occultation 47 equatorial 47 Comet Churyumov Gerasimenko 47 sunlike star 47 Planetary Transits 47 highly elliptical orbit 47 Cybertronian 47 reptilian humanoids 47 blazar 47 baryon 47 constellation Eridanus 47 NASA Cassini spacecraft 47 Explorer WISE 47 occultation 47 Starro 47 Sycorax 47 Vampiric 47 starquakes 47 constellation Cygnus 47 icy comets 47 Queloz 47 VIRTIS 47 THEMIS Image 47 Muons 47 extrasolar planets 46 Rosette Nebula 46 HL Tau 46 circular orbit 46 particle acceleration 46 carbonaceous chondrite 46 Lunar Eclipse 46 Alfred Wegener 46 YORP effect 46 constellation Auriga 46 Pieter van Dokkum 46 Europa Ganymede 46 astronomer Percival Lowell 46 Delta Aquarids 46 Kepler Space Telescope 46 Hyakutake 46 Phoebe orbits 46 interglacial periods 46 Xindi 46 spacecrafts 46 Perseids meteor shower 46 Quadrantid 46 Milankovitch 46 S/# P2 46 sols 46 Meteor showers 46 Slartibartfast 46 stellar occultation 46 Haumea 46 Cassini Huygens 46 Comet Tempel 1 46 outermost planet 46 constellation Lacerta 46 DISR 46 galactic halo 46 Bonnie Buratti 46 Colonize 46 midlatitudes 46 Cassini Image 46 planet magnetosphere 46 orbiting Mars 46 Virgo adore 46 Hubble Space Telescope HST 46 aphelion 46 Kepler #b 46 submillimetre wavelengths 46 ESA Mars 46 Encke gap 46 Eta Aquarids 46 Einstein cosmological constant 46 Olympus Mons 46 Scorpio adore 46 Cosmic Evolution 46 velocity vector 46 moon Dione 46 globular cluster M# 46 Comet #P 46 constellation Cassiopeia 46 Ian McShane Pillars 46 Kuiper Belt objects 46 creatures inhabiting 46 precessing 46 planet TrES 46 Saturn moons 46 Earth magnetosphere 46 Midheaven 46 AU Mic 46 Ki Elisabeth Harnois 46 Zodiacal 46 supergiant stars 46 radial velocity technique 46 microlensing events 46 IRAS #-# 46 Geminid meteors 46 Pegasi 46 constellation Orion 46 extraterrestrial civilization 46 NASA twin rovers 46 Gravitational waves 46 nebular 46 polar latitudes 46 asteroid 46 Pisces adore 46 cylon 46 antineutrinos 46 Mon Calamari 46 novae 46 auroral emissions 46 retroreflector 46 obliquity 46 NASA ICESat 46 constellation Virgo 46 Phobos 46 Hieronymus Bosch painting 46 Saturn Jupiter Uranus 46 outermost ring 46 millisecond pulsar 46 solar irradiance 46 Vogons 46 Canis Major 46 periodic dimming 46 spacecraft orbited 46 novas 46 Convection Rotation 46 chondrites 46 comet McNaught 46 distant galaxy 46 auroral 46 subsurface ocean 46 comet tail 46 winged messenger 46 lunar maria 46 interstellar distances 46 Gliese #g 46 Meteor shower 46 Jules Vernes 46 moon Phobos 46 meteoroid impacts 46 SIRTF 46 mermen 46 gravitational microlensing 46 equinox 46 Lulin 46 insectlike 46 spacefaring 46 alien 46 Marchis 46 crustal thickness 46 solar eclipses 46 flyby 46 coronal holes 46 Interstellar Boundary Explorer 46 moon Iapetus 46 extraterrestrial 46 Saturn moons Titan 46 Titan flybys 46 binary quasar 46 Leonid meteors 46 Fomalhaut 46 TRMM satellite 46 crescent Moon 46 astrophysical 46 Libra adore 46 Milky Way halo 46 cometary material 46 heliosphere 46 blazars 46 Giuseppe Piccioni 46 geomagnetic storms 46 exoplanets planets 46 Pisces #.#-#.# 46 Magnetosphere 46 Higgs Boson particle 46 GJ#b 46 Cassini spacecraft 46 geomagnetic 46 Avishay Gal Yam 46 Kepler Mission 46 martian atmosphere 46 reentry capsule 46 SMBH 46 R Coronae Borealis 46 magnetar 46 Ceti 46 astral projection 46 HM Cancri 46 xenomorph 46 trans Neptunian 46 flybys 46 Mercury flyby 46 planets asteroids 46 Cosmological 46 spookfish 46 outer space 46 planet transits 45 X ray wavelengths 45 Sontarans 45 NASA THEMIS 45 XO 3b 45 Krimigis 45 Cosmic ray 45 tidally 45 Hinode 45 atmospheric phenomena 45 comets 45 circumstellar 45 antiparticle 45 Libras 45 cosmic ray 45 Lagoon Nebula 45 blue supergiant 45 Comet McNaught 45 THEMIS Images 45 # Apophis 45 Weightlessness 45 Hubble Constant 45 comets moons 45 planetary atmospheres 45 Heliospheric Observatory 45 Jacque Fresco 45 Earth magnetotail 45 transiting planets 45 Mars CRISM 45 exosolar planets 45 Universe 45 Biker Mice 45 Jonathan Lunine 45 rover panoramic 45 reflection nebula 45 interstellar dust grains 45 LORRI 45 Wolf Rayet star 45 planet HD #b 45 Orionid meteor shower 45 Rayleigh scattering 45 telescope eyepiece 45 extragalactic 45 EPOXI mission 45 KAGUYA 45 Orionid meteors 45 polar 45 gravitational interaction 45 Leonid meteor showers 45 Aquarius adore 45 starscape 45 lensing galaxy 45 Alycia Weinberger 45 Asgardians 45 asteroid collisions 45 HiRISE image 45 electron flux 45 lunar meteorites 45 Despero 45 planet Tatooine 45 starlike object 45 panspermia 45 exoplanetary systems 45 Trifid 45 MG J# +# 45 asteroid impacts 45 Trillian Zooey Deschanel 45 ionized hydrogen 45 cosmic ray intensity 45 Cygnus Lyra region 45 Alex Filippenko 45 Pioneer Anomaly 45 Beta Pictoris 45 Nefarian 45 Fashion Movie Reviews 45 Shepherding Spacecraft 45 NEAs 45 ESA Rosetta 45 Trojan asteroids 45 Alderaan 45 rotational axis 45 SNe Ia 45 Wormholes 45 twin STEREO spacecraft 45 constellation Cetus 45 Ringed Planet 45 Jupiter moons Europa 45 Fermi paradox 45 gravitational lenses 45 WISE spacecraft 45 Captain Harlock 45 electron orbits 45 MEarth 45 Scorpius 45 nakshatra 45 libration 45 oblate spheroid 45 mythical beings 45 Gal Yam 45 twin suns 45 Nekron 45 Cosmologists 45 lithosphere 45 Southern Oscillation 45 protoplanets 45 Charon Pluto 45 MARSIS instrument 45 Suzaku 45 interstellar dust particles 45 oddball planetary 45 Comet LINEAR 45 volcanic plumes 45 luminous galaxies 45 Deep Impact eXtended Investigation 45 dustier stormier atmosphere 45 Hale Bopp comet 45 Saturn moon Enceladus 45 HD# [002] 45 Lyrae 45 skywatching 45 robotic explorers 45 X ray binaries 45 Gamma ray burst 45 outer corona 45 Martian surface 45 Astrophysicists 45 Rubi ka 45 Diviner 45 NASA Voyager spacecraft 45 noosphere 45 spaceship 45 retrograding 45 moons orbiting Saturn 45 extrasolar planet 45 sunspots 45 stellar nurseries 45 Pluto 45 UDFy # 45 CoRoT #b 45 tau neutrinos 45 brightest supernova 45 gamma ray emission 45 RRATs 45 Hadean 45 Mojzsis 45 Beta Centauri 45 terrestrial planets 45 Silenus 45 immortal beings 45 Comet Tempel Tuttle 45 interstellar boundary 45 La Silla observatory 45 Ultraviolet Imaging Spectrograph 45 photometry 45 ESO VLT 45 Earthly 45 THEMIS spacecraft 45 coronal mass ejections CMEs 45 planets orbiting 45 superstrings 45 Coma Cluster 45 X ray telescopes 45 polar craters 45 cesium atom 45 Orbiter MRO 45 Librans 45 Magellanic 45 Higgs bosons 45 Dumbbell Nebula 45 Polyphemus 45 lobate scarps 45 asteroid Steins 45 Vernal Equinox 45 lizardlike 45 Interplanetary 45 Omega Centauri 45 Mars Odyssey spacecraft 45 magnetic monopole 45 compass needle 45 lunar highlands 45 Doppler Effect 45 filamentary structure 45 Gerhard Schwehm 45 Earth biosphere 45 electron neutrinos 45 Solar Flares 45 magnetic reconnection 45 orbiter Mars Odyssey 45 detect gravitational waves 45 Magnetic Imager 45 millimeter wavelengths 45 inky blackness 45 Betelgeuse 45 penumbral shadow 45 planetary nebulae 45 gravitational tides 45 Braniac 45 Trapezium 45 Magellanic Stream 45 Cassini spacecraft orbiting 45 lunar craters 45 planetary alignment 45 Ranging spacecraft 45 axions 45 observable phenomena 45 Viking Lander 45 intrinsic brightness 45 Herbig Haro 45 Viking landers 45 Wiccans worship 45 NASA MESSENGER spacecraft