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(Click for frequent words.) 72 gaseous planets 71 gaseous planet 70 moons orbiting 70 Galilean satellites 69 subsurface ocean 69 Kuiper Belt Objects 69 rocky planets 69 extrasolar 69 asteroids comets 69 KBOs 69 protoplanet 69 Kuiper belt 68 lunar crust 68 planets orbits 68 magma ocean 68 protoplanetary disks 68 Earthlike 68 elongated orbits 68 asteroidal 68 retrograde orbit 68 hydrated minerals 68 Kuiper belt objects 68 Galilean moons 67 ejecta 67 Upsilon Andromedae 67 Saturn moons 67 permanently shadowed craters 67 Corot 7b 67 Venusian atmosphere 67 moonlets 67 Fomalhaut b 67 Jupiter moon Io 66 comets asteroids 66 proplyds 66 Saturn moon 66 phyllosilicates 66 heavily cratered 66 stony meteorites 66 Saturn Enceladus 66 Saturnian moons 66 galactic cosmic rays 66 Saturn rings 66 globulars 66 stellar nurseries 66 Neptune Uranus 66 WASP #b 66 solar nebula 65 planets 65 protoplanetary disk 65 moons Phobos 65 exoplanets orbiting 65 exosphere 65 planetary nebulae 65 Neutron stars 65 moon Enceladus 65 interstellar clouds 65 dirty snowballs 65 Earthlike planets 65 chondrules 65 Hot Jupiters 65 outer corona 65 HD #b [002] 65 basaltic rocks 65 Saturnian moon 65 jovian 65 Jovian moon 65 polar craters 65 Kuiper Belt objects 65 X ray wavelengths 65 nebular 65 Kuiper Belt object 65 circumstellar 65 Beta Pictoris b 64 chromosphere 64 comets orbiting 64 planetesimals 64 outer planets 64 hot Jupiters 64 Gravitational waves 64 planets Uranus 64 Enceladus 64 merging galaxies 64 moon Ganymede 64 exoplanetary 64 extrasolar planets 64 Earthlike planet 64 moon Europa 64 terrestrial planets 64 photosphere 64 hematite mineral 64 sunlike stars 64 meteoroids 64 habitable zones 64 planetesimal 64 super Earths 64 Epsilon Eridani 64 moon Io 63 moon Mimas 63 olivine mineral 63 planet Gliese #c 63 elliptical orbits 63 nebulae 63 luminous galaxies 63 P/# A2 63 Jupiter Ganymede 63 icy crust 63 impactors 63 X ray binaries 63 Phoebe orbits 63 Pluto Charon 63 circumstellar disks 63 carbonaceous chondrites 63 Jovian moons 63 protoplanets 63 planets asteroids 63 COROT 7b 63 planets orbiting stars 63 Saturn magnetosphere 63 supersymmetric particles 63 AGNs 63 Voyager spacecraft 63 lensing galaxy 63 Europa Ganymede 63 Saturn Uranus 63 GJ #b [002] 63 Corot 9b 63 carbonate minerals 63 trans Neptunian objects 63 red supergiants 63 planets orbiting distant 63 moonlet 63 silicon monoxide 63 galactic disk 63 accretion disks 63 Martian meteorites 63 dwarf galaxies 63 circumstellar disk 63 X ray binary 63 Oort Cloud 63 planemos 63 habitable planets 62 Cosmic Microwave Background 62 HD#b 62 Upsilon Andromedae b 62 cosmological distances 62 cometary 62 planets comets 62 comet nucleus 62 mantle plumes 62 sized planets orbiting 62 lunar craters 62 Arches Cluster 62 Galileo spacecraft 62 planetoids 62 planetary orbits 62 icy comets 62 Martian craters 62 smallest exoplanet 62 cometary debris 62 SN#A 62 moons Io 62 Wolf Rayet stars 62 silicate mantle 62 Quaoar 62 planetary surfaces 62 Martian surface 62 GJ #b [001] 62 volcanic moon Io 62 transiting planets 62 noctilucent clouds 62 Higgs bosons 62 brown dwarfs 62 moon Titan 62 exo planets 62 comets 62 comet 62 GJ#b 62 planet HD #b 62 CoRoT 7b 62 solar corona 62 elliptical galaxies 62 protostars 62 ejecta blanket 62 filamentary structure 62 icy moon Enceladus 62 inner moons 62 carbonate globules 62 gravitational interactions 62 hydrogen helium 62 Coma Cluster 62 Bok globules 61 moons 61 Io Europa 61 Cassini flybys 61 Orion nebula 61 Jupiter Saturn 61 interstellar dust 61 hydroxyl molecules 61 Syrtis Major 61 eccentric orbits 61 interstellar dust grains 61 magnetosphere 61 Saturn outermost 61 planets orbiting 61 Saturn Cassini 61 Gliese #c 61 CoRoT #b 61 primitive meteorites 61 planets orbiting sun 61 cometary material 61 Saturn Jupiter Uranus 61 orbits 61 supermassive 61 meteor impacts 61 planet Uranus 61 Saturn moon Enceladus 61 carbonaceous chondrite 61 Jupiter Saturn Uranus 61 unmanned probes 61 Oort cloud 61 ULIRGs 61 giant gaseous planets 61 OGLE TR #b 61 martian atmosphere 61 fainter objects 61 comet nuclei 61 VY Canis Majoris 61 Epsilon Aurigae 61 martian surface 61 chondrites 61 inhabitable planets 61 Jupiter icy moons 61 Jupiter Uranus 61 ultraviolet wavelengths 61 mesosphere 61 binary asteroid 61 cryovolcanism 61 Valles Marineris 61 planetary nebulas 61 circular orbits 61 Eagle Nebula 61 planets moons 61 Ring Nebula 61 innermost planet 61 infalling 61 supergiant star 61 spherules 61 TrES 4 61 polar vortex 61 Antennae Galaxies 60 Super Earths 60 extrasolar planet 60 Milky Way halo 60 proto planetary disks 60 nucleosynthesis 60 magnetic monopoles 60 potentially habitable 60 weakly interacting 60 occultations 60 astrobiological 60 galactic cores 60 Magnetars 60 cosmic phenomena 60 eclipsing binaries 60 Saturnian moon Titan 60 coronal mass ejections CMEs 60 AB Aurigae 60 lunar equator 60 silicate minerals 60 gravitationally bound 60 Uranus 60 Meridiani 60 X ray emission 60 galactic mergers 60 distant galaxies 60 silicate dust 60 mineral olivine 60 Kuiper Belt 60 ionized hydrogen 60 Bug Nebula 60 airglow 60 Jonathan Lunine 60 globular clusters 60 galaxy clusters 60 moon Charon 60 exoplanets 60 aurorae 60 silicates 60 planet Gliese #g 60 galaxy M# [002] 60 shadowed craters 60 jarosite 60 asteroids 60 Beta Pictoris 60 microplastics 60 Omega Centauri 60 astronomical objects 60 ALH# 60 red supergiant 60 lunar meteorites 60 Kuiper belt object 60 permanently shadowed regions 60 Stephan Quintet 60 astrophysical objects 60 galaxy cluster 60 interstellar cloud 60 Candor Chasma 60 protoplanetary 60 orbital resonance 59 Solar System 59 active galactic nuclei 59 lunar highlands 59 martian rocks 59 Comet Halley 59 smoothest flattest 59 gravitational pulls 59 Kuiper Belt Object 59 millisecond pulsars 59 constellation Virgo 59 Mojzsis 59 gray hematite 59 zodiacal light 59 mineral hematite 59 MG J# +# 59 Alfven waves 59 planets circling stars 59 olivines 59 gravitational interaction 59 Galaxy Evolution 59 Saturn moon Mimas 59 Veil Nebula 59 energetic cosmic rays 59 Jupiter moons 59 Sedna 59 Cosmic rays 59 Martian dust 59 supernova remnants 59 Henize #-# 59 baryonic matter 59 sunlike star 59 neutralinos 59 AU Mic 59 meteoroid 59 planets astronomers 59 diffuse aurora 59 axial tilt 59 active volcanism 59 intrinsic brightness 59 Cancri e 59 planetary 59 habitable planet 59 magnetotail 59 Cabeus crater 59 APXS 59 olivine 59 mineralogical composition 59 Spiral galaxies 59 lavas 59 comet McNaught 59 Orion Nebula 59 hydrated silica 59 Kepler 9c 59 SMBHs 59 crystalline silicates 59 Cat Paw Nebula 59 prograde 59 asteroid Vesta 59 planet orbits 59 Globular clusters 59 Red Rectangle 59 supernova explosions 59 Milky Way Galaxy 59 crustal rocks 59 Wolszczan 59 ah dus 59 brown dwarf 59 hydrosphere 59 extrasolar planetary systems 59 lobate scarps 59 galactic clusters 59 spiral galaxies 59 BLG #Lb 59 gravitational lenses 59 reionization 59 rotational axis 59 extrasolar planets orbiting 59 smoggy atmosphere 59 Mercury magnetosphere 59 stellar occultations 59 constellation Carina 59 Earth magnetosphere 59 blazars 59 axions 59 HL Tau 59 Cassini flyby 59 Lake Vostok 59 unaided eye 58 gamma rays emitted 58 stellar occultation 58 NASA rovers Spirit 58 Uranus Neptune 58 blue supergiant 58 Gamma ray bursts 58 moons circling 58 ionized gas 58 galaxies 58 magnetars 58 interacting galaxies 58 tholins 58 galaxy formation 58 spheroidal 58 baryonic 58 protostar 58 spiral nebulae 58 pyroxene 58 Dwarf galaxies 58 Grillmair 58 retrograde orbits 58 Saturnian 58 volcanic vents 58 Diviner instrument 58 dynamical processes 58 transiting planet 58 supernova explosion 58 noble gases 58 starburst galaxies 58 sulfate aerosols 58 collisional 58 gravitational tugs 58 isotopic ratios 58 galactic halo 58 Churyumov Gerasimenko 58 lunar magma 58 X ray telescopes 58 TNOs 58 craters 58 RRATs 58 barred spiral galaxy 58 graphite whiskers 58 permanently shadowed 58 galaxy NGC 58 Hellas Basin 58 exoplanet 58 interstellar grains 58 Jupiter moons Europa 58 ringed planet 58 gravitational perturbations 58 Virgo Cluster 58 Toutatis 58 shadowy craters 58 Carina constellation 58 Gamma rays 58 baryon 58 globular cluster 58 molten magma 58 filamentary structures 58 elliptical galaxy 58 Mandushev 58 Pluto Eris 58 orbits Saturn 58 planet magnetosphere 58 ferric oxides 58 concretions 58 gravitationally 58 planets circling 58 BP Piscium 58 sulfate salts 58 spatially resolved 58 Martian equator 58 CoRoT satellite 58 Noctilucent clouds 58 metallicity 58 neutron star 58 neutralino 58 exoplanetary systems 58 XO 3b 58 Saturn outermost ring 58 SMBH 58 Trojan asteroids 58 Terra Meridiani 58 infall 58 spherically symmetric 58 RS Ophiuchi 58 Caloris 58 hydrothermal vent 58 Milankovitch cycles 58 coronal loops 58 Trifid Nebula 58 Manned missions 58 spacecraft flyby 58 GRBs 58 Aram Chaos 58 nebulas 58 SN #gy 58 particle acceleration 58 Gusev crater 58 radial velocity 58 accretion disk 58 Type Ia supernova 58 Viking orbiters 58 antimatter particles 58 circumstellar dust 58 Asteroid Belt 58 Cepheid variables 58 cometary dust 58 infrared telescopes 58 Arsia Mons 58 planetary nebula 58 silicate grains 58 Mimas 58 magmas 58 plagioclase 58 meteorite impacts 58 radioactive nuclei 58 Zeta Ophiuchi 58 polar mesospheric clouds 57 flood basalts 57 distant galaxy 57 gravitational tides 57 chlorine monoxide 57 distant quasars 57 asteroids orbiting 57 KH #D 57 occulted 57 supergiant stars 57 periodic dimming 57 Kepler #b 57 nebulosity 57 GALEX 57 transiting exoplanet 57 meteoritic material 57 eclipsing binary 57 auroral displays 57 zodiacal dust 57 Titan Saturn 57 subglacial lakes 57 VB #b 57 ionise 57 masers 57 helium atoms 57 outermost planets 57 planetary embryos 57 magnetospheric 57 rotating neutron stars 57 Lunine 57 active galactic nucleus 57 NASA rover Spirit 57 distant supernovae 57 planetary magnetospheres 57 clathrates 57 giant elliptical galaxies 57 Evolution Explorer 57 Gliese #d 57 protoplanetary discs 57 albedo reflectivity 57 Saturnian system 57 Comet Hartley 2 57 spectral fingerprints 57 Mercury Uranus 57 reflection nebula 57 SN #C 57 sodium atoms 57 planetary Transits 57 Extrasolar planets 57 Solar TErrestrial RElations Observatory 57 phyllosilicate 57 coronal holes 57 astrobiologists 57 Svedhem 57 Saturn moons Enceladus 57 lunar regolith 57 NASA twin rovers 57 electron neutrinos 57 relativistic particles 57 meteorite fragments 57 Milky Way galaxy 57 moon Phobos 57 ammonia hydrates 57 moons Europa 57 zodiac constellations 57 Martian rovers 57 galaxy M# [001] 57 volcanically active 57 silicate rocks 57 Iapetus 57 NASA Cassini 57 dusty disks 57 habitable worlds 57 cosmic cannibal 57 retroreflector 57 Carina Nebula 57 earthlike 57 meteorites 57 undersea volcanoes 57 submillimeter galaxies 57 astrophysical 57 sedimentary deposits 57 energetic electrons 57 Gliese #e 57 NEAs 57 quark gluon plasma 57 Perseus Cluster 57 Cepheids 57 highly elliptical orbits 57 Magellanic Clouds 57 radial velocity technique 57 outer crust 57 polar caps 57 WIMPs 57 asteroid 57 sterile neutrino 57 presolar grains 57 regolith 57 BP Psc 57 spectroscopically 57 visible wavelengths 57 Pluto moon Charon 57 CoRoT 9b 57 organic molecules 57 Rosette Nebula 57 GQ Lupi 57 evaporite deposits 57 Eta Carinae 57 Orionid meteors 57 planet orbiting 57 Jupiter magnetosphere 57 Comet Tempel Tuttle 57 infrared wavelengths 57 Olympus Mons 57 extrasolar worlds 57 blazar 57 radial velocity method 57 infrared spectra 57 Mercury exosphere 57 Wolf Rayet star 57 prebiotic molecules 57 bedrock outcropping 57 colliding galaxies 57 Sagittarius dwarf galaxy 57 helium nuclei 57 supervolcanoes 57 ecliptic plane 57 microquasar 57 Pleiades cluster 57 starburst galaxy 57 yardangs 57 gravitational microlensing 57 binary asteroids 57 Nasa spacecraft 57 microbialites 57 planetary atmospheres 57 extragalactic 56 prominences 56 geologically active 56 martian 56 dynamical evolution 56 Bose Einstein condensates 56 Fornax cluster 56 Martian atmosphere 56 gravity warps 56 cosmic ray flux 56 magma chambers 56 emission nebula 56 ionized gases 56 neutrino mass 56 Rossby waves 56 isotopic compositions 56 star Spica 56 Galactic cosmic rays 56 exoplanets planets 56 sulfur isotope 56 tidally 56 aerosol particles 56 COROT 56 coccolithophores 56 starquakes 56 cluster NGC 56 equatorial regions 56 moon Mab 56 Andromeda Galaxy 56 slender crescent 56 smoothest flattest spot 56 HM Cancri 56 cratons 56 moonquakes 56 Jovian planets 56 star Beta Pictoris 56 Goldilocks zone 56 infalling gas 56 CMB radiation 56 Orionid 56 Maunder minimum 56 ostracods 56 Mars Uranus 56 lunar poles 56 observable universe 56 #P/Churyumov-Gerasimenko 56 galactic bulge 56 celestial bodies 56 superheavy elements 56 moons orbiting Saturn 56 interstellar particles 56 polarimetry 56 SN #A 56 astrophysical phenomena 56 Compact Reconnaissance Imaging Spectrometer 56 basalts 56 Ontario Lacus 56 comet Churyumov Gerasimenko 56 asteroid impacts 56 plutoids 56 Comet 9P/Tempel 1 56 olivine crystals 56 stromatolites 56 filamentary 56 NASA Cassini spacecraft 56 type Ia supernovae 56 baryons 56 specular reflection 56 spherical halo 56 earthlike planets 56 X ray emitting 56 lithosphere 56 CAIs 56 Shackleton crater 56 chondritic meteorites 56 Pieter van Dokkum 56 Higgs particle 56 dense clumps 56 Lagoon Nebula 56 Hubble observations 56 moons JAXA 56 martian meteorites 56 Tarantula Nebula 56 HiRISE image 56 X ray observatories 56 Uranus Jupiter 56 Comet Machholz 56 type Ia supernova 56 biosignatures 56 quark gluon 56 millisecond pulsar 56 Viking Lander 56 Triangulum 56 magnetar 56 oblate spheroid 56 meteoroid impacts 56 celestial object 56 star Gliese 56 starlike 56 lunar perigee 56 gamma ray emission 56 Comet Holmes 56 colloidal crystals 56 Orbiter MRO 56 orbited Jupiter 56 magnetite crystals 56 supernovae explode 56 assumed planets circling 56 Geminga 56 galaxies collide 56 elemental abundances 56 Mars CRISM 56 proto galaxies 56 Haumea 56 Endurance crater 56 Earth magnetotail 56 Konacki 56 single celled algae 56 Voyager probes 56 Cabeus 56 Sojourner rover 55 planets atmospheres 55 Helix nebula 55 impactor spacecraft 55 exosolar planets 55 Delta Cephei 55 smallest exoplanets 55 trimers 55 kaons 55 faint galaxies 55 micrometeoroids 55 Pleiades star 55 supermassive stars 55 cometary impacts 55 bosonic 55 atomic lattice 55 Helix Nebula 55 Milky Way 55 constellation Cassiopeia 55 polar regions 55 Io volcanoes 55 Orionids 55 stellar seismology 55 Arabia Terra 55 nebula 55 scarps 55 magnetospheres 55 Earth asteroids 55 SDSS II 55 SNR #-#.# 55 SIRTF 55 redshifts 55 Small Magellanic Cloud 55 nucleobases 55 Martian polar 55 dust mote 55 Titan smoggy 55 orbital eccentricity 55 Caloris Basin 55 spacetime 55 Supernovae 55 oceanic crust 55 volcanoes spewing 55 Saturn moon Iapetus 55 submillimeter 55 martian soil 55 spectroscopic observations 55 crystal lattices 55 Tunguska asteroid 55 HiRISE camera aboard 55 constellation Aquarius 55 Antarctic Dry Valleys 55 Mud volcanoes 55 W boson 55 magnetic substorms 55 reentry capsule 55 neutron stars 55 HiRISE images 55 seafloor sediments 55 hydrostatic equilibrium 55 Lunar Prospector 55 igneous rocks 55 inner asteroid belt 55 Viking landers 55 proto cluster 55 orbital inclination 55 Gas hydrates 55 meteoritic 55 oxygen isotopes 55 Planck satellite 55 Kraken Mare 55 lunar soil 55 dwarf spheroidal galaxies 55 gaseous envelope 55 carbon isotopes 55 synchronous orbit 55 backscattered 55 Surface Composition Spectrometer 55 aragonite 55 missing baryons 55 Comet Tempel 1 55 Gliese #g 55 subglacial lake 55 Martian terrain 55 Quadrantids 55 Gliese #G 55 submillimetre wavelengths 55 primitive organisms 55 spherical particles 55 galactic nuclei 55 emit X rays 55 microbial ecosystems 55 inner Oort Cloud 55 chemical abundances 55 comet particles 55 Andromeda galaxy 55 Exoplanets 55 Earthly contamination 55 WISE telescope 55 outermost layers 55 calderas 55 foraminifera 55 Venusian surface 55 Dumbbell Nebula 55 tidal tails 55 Comet Hartley 55 oxygen isotope 55 mesons 55 ionized particles 55 IRC +# 55 Neptune Jupiter 55 crystallites 55 arctic plains 55 prebiotic chemistry 55 Earths orbiting 55 galaxy 55 neutrino 55 GZK cutoff 55 atomic nuclei 55 ultracold atoms 55 gamma ray flares 55 constellation Ursa Major 55 Global Surveyor spacecraft 55 sun corona 55 HD# [002] 55 superfluids 55 situ measurements 55 Murchison meteorite 55 de Pater 55 earthshine 55 goethite 55 lava tubes 54 Cassini imaging 54 celestial phenomena 54 micrometre sized 54 constellation Hercules 54 magma boiling 54 antiferromagnets 54 Scheila 54 nuclei 54 star Fomalhaut 54 post perovskite 54 gravitational lensing 54 potentially habitable planets 54 supergiants 54 Descent Imager Spectral Radiometer 54 asteroid belt 54 Spudis 54 Spitzer Space Telescope 54 inhomogeneous 54 Goldilocks planet 54 constellation Lyra 54 gaseous methane 54 TrES 54 X ray spectrometer 54 particle detectors 54 constellation Taurus 54 planetary geologists 54 Bonnie Buratti 54 isotope ratios 54 GRB #B 54 planetary alignments 54 Saturn moons Titan 54 intracluster 54 supercooling 54 dust enshrouded 54 blue straggler 54 Bullet Cluster 54 spiral galaxy NGC 54 supernovae 54 HIP #b 54 extrasolar planet HD #b 54 perihelion 54 foreground galaxy 54 comet dust 54 telescopic observations 54 neutral mass spectrometer 54 planet WASP #b 54 distant supernovas 54 Mars landers 54 constellation Cetus 54 Phobos 54 interstellar medium 54 Geminid meteors 54 underwater volcanoes 54 VIRTIS 54 Cassini 54 Mars Squyres 54 Type Ia 54 celestial sphere 54 electrons protons 54 Opportunity rover 54 interstellar dust particles 54 emits X rays 54 V# Mon 54 orbiting planets 54 NGC# 54 asterism 54 Elliptical galaxies 54 Quadrantid 54 Mars 54 Mars Phobos 54 quasar 54 cryosphere 54 millimeter wavelengths 54 quasicrystal 54 hadrons 54 penumbral shadow 54 tectonic plate boundaries 54 IRAS 4B 54 Meteorites 54 dwarf planets 54 Martian arctic 54 Earth ionosphere 54 proto planetary disk 54 impactor 54 afterglows 54 Diviner 54 osmium 54 ionize 54 orbiting Mars 54 neutrino particles 54 Mini TES 54 sparticles 54 Palaeozoic sedimentary 54 isotope fractionation 54 novas 54 Astrological lore