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(Click for frequent words.) 62 phyllosilicates 58 hydrated minerals 57 hematite mineral 57 martian rocks 57 Martian craters 56 astrobiologists 56 Kuiper belt objects 56 lunar meteorites 56 Martian meteorites 56 exoplanetary 56 noctilucent clouds 56 Mini TES 56 permanently shadowed craters 56 mineral olivine 56 lunar regolith 55 extrasolar 55 nebular 55 Martian meteorite 55 Martian rocks 55 Meridiani 55 spherules 55 Jonathan Lunine 55 ALH# 54 meteorite impacts 54 Saturn rings 54 Olympus Mons 54 icy moons 54 lunar crust 54 icy comets 54 interstellar grains 54 polygon patterns 54 Aram Chaos 54 polar craters 54 Oort cloud 54 gray hematite 54 comets asteroids 54 telescopes astronomers 53 protoplanet 53 astrobiological 53 sulfate minerals 53 martian meteorites 53 Martian microbes 53 heavily cratered 53 distant supernovae 53 lunar soil 53 interstellar dust grains 53 asteroids comets 53 Saturn moons 53 unmanned probes 53 paleomagnetic 53 comets 53 Viking orbiters 53 meteorites 53 planetary nebulae 53 Saturn Cassini 53 cinder cones 53 Earthlike planets 53 HiRISE camera 53 subsurface ocean 53 nucleosynthesis 53 dirty snowballs 53 Saturn Enceladus 53 Kounaves 53 jarosite 53 Gusev crater 52 Antarctic Dry Valleys 52 speleothems 52 magma ocean 52 ferric oxides 52 Lunine 52 silicate rocks 52 exosphere 52 microbial ecosystems 52 Martian landscape 52 stromatolites 52 KBOs 52 stony meteorites 52 cryovolcanism 52 Compact Reconnaissance Imaging Spectrometer 52 Saturnian moon 52 cometary 52 asteroidal 52 HiRISE image 52 shadowed craters 52 Corot 7b 52 concretions 52 comet dust 52 mineral hematite 52 cosmic phenomena 52 Apollo missions 52 SN #A 52 protoplanetary disks 52 Jovian moon 52 phyllosilicate 52 basaltic rocks 52 comet particles 52 sunlike stars 52 Larry Soderblom 52 comet nuclei 52 microbialites 52 meteor impacts 51 permanently shadowed regions 51 lunar poles 51 carbonaceous chondrite 51 Manned missions 51 Galileo spacecraft 51 Cometary 51 Valles Marineris 51 Martian terrain 51 lava tubes 51 Nikku Madhusudhan 51 cometary dust 51 observational astronomy 51 Hubble observations 51 sedimentary deposits 51 Evolution Explorer 51 hydrosphere 51 Voyager spacecraft 51 primitive meteorites 51 Jupiter moon Io 51 lunar craters 51 Tharsis Rise 51 carbonaceous meteorites 51 Terra Meridiani 51 Viking Lander 51 Earthlike 51 ESA Mars 51 planets asteroids 51 Kuiper Belt Objects 50 planets atmospheres 50 Mars landers 50 Venusian atmosphere 50 Comet Halley 50 binary asteroid 50 GJ #b [001] 50 Galilean satellites 50 sulfate salts 50 crystalline silicates 50 geochemists 50 planetary science 50 stromatolite 50 meteorite bombardment 50 lobate scarps 50 astronomers 50 biosignatures 50 Mars Squyres 50 Nasa Kepler 50 spectral fingerprints 50 terrestrial planets 50 hydroxyl molecules 50 Globular clusters 50 Neutron stars 50 magnetars 50 ESA XMM Newton 50 chondrules 50 Hellas Basin 50 Noachian era 50 Epsilon Aurigae 50 WMAP satellite 50 cosmic collisions 50 planemos 50 red supergiants 50 moon Enceladus 50 Di Achille 50 globulars 50 lunar maria 50 Spitzer Space Telescope 50 TrES 4 50 mantle plumes 50 gravitational lenses 50 spectroscopic measurements 50 ammonia hydrates 50 sterile neutrino 50 volcanic lava flows 50 moon Europa 50 exo planets 50 protostars 50 gravitational microlensing 50 Gamma ray burst 50 dust enshrouded 50 circumstellar 50 Cassini Huygens 50 lensing galaxy 50 Henize #-# 50 meteoritic material 50 APXS 50 Mercury magnetosphere 50 astrobiology 49 carbonaceous chondrites 49 cometary material 49 CAIs 49 planets orbiting sun 49 radiometric dating 49 zodiacal light 49 smoothest flattest 49 tetrapods evolved 49 meteorite fragments 49 Galilean moons 49 extrasolar planetary systems 49 meteor craters 49 panspermia 49 interstellar dust 49 smoggy atmosphere 49 moonwalkers 49 GJ#b 49 retrograde orbit 49 SN #C 49 planets orbiting distant 49 carbonate minerals 49 neutrino particles 49 gaseous planets 49 Viking landers 49 Gravitational waves 49 solar nebula 49 AERONET 49 hydrated silica 49 homochirality 49 astrophysical phenomena 49 carbonate globules 49 orbiting spacecraft 49 planetary Transits 49 silicate dust 49 ejecta blanket 49 dimming starlight 49 planets orbiting stars 49 rocky planets 49 micrometeorite impacts 49 planet Gliese #g 49 Hot Jupiters 49 paleoclimatology 49 Dry Valleys 49 moonlets 49 rubbly 49 polar caps 49 abiogenesis 49 Gliese #c 49 interstellar cloud 49 Candor Chasma 49 olivine mineral 49 Saturn moon 49 ejecta 49 Shackleton Crater 49 Ontario Lacus 49 Martian rovers 49 Oort Cloud 49 potentially habitable 49 regolith 49 chondritic meteorites 49 atmospheric oceanic 49 martian surface 49 infrared telescopes 49 aerosol measurements 49 SINFONI 49 astrophysicists 49 Astrobiologists 49 lunar equator 49 NEAs 49 Lake Vostok 49 proto planetary disk 48 planet Gliese #c 48 seafloor sediments 48 Martian volcanoes 48 isotopic ratios 48 spiral nebulae 48 merging galaxies 48 yardangs 48 McMurdo Dry Valleys 48 IRC +# 48 Mars rovers Spirit 48 galaxy redshift 48 NASA Lunar Prospector 48 circumstellar disks 48 comet McNaught 48 planet Uranus 48 Titan Saturn 48 radial velocity technique 48 micro meteorites 48 active volcanism 48 Michael Studinger 48 Hesperian Epoch 48 lavas 48 planetesimal 48 Epsilon Eridani 48 Martian polar 48 lunar magma 48 planetary atmospheres 48 Spudis 48 X ray observatory 48 protoplanetary disc 48 Saturnian system 48 accretion disks 48 GJ #b [002] 48 galactic collisions 48 extrasolar worlds 48 filamentary structure 48 Kepler #b 48 Kraken Mare 48 Fomalhaut b 48 spatially resolved 48 proto galaxies 48 lunar landers 48 Enceladus 48 Maunder minimum 48 shadowy craters 48 Earthlike planet 48 galactic cosmic rays 48 extrasolar planets 48 SN #gy 48 uncovering geologic 48 landforms 48 earthlike 48 Martian dunes 48 distant supernovas 48 Saturn outermost ring 48 CRISM 48 climate modelers 48 TNOs 48 Solar TErrestrial RElations Observatory 48 Martian equator 48 volcanic lava 48 AU Mic 48 chondrites 48 microlensing events 48 spaceborne 48 HARPS instrument 48 Cygnus Lyra region 48 novas 48 Saturnian moons 48 smallest exoplanet 48 Planetary Science Institute 48 CoRoT 9b 48 reionization 48 Samuel Oschin Telescope 48 tholins 48 spacecraft flyby 48 circumstellar disk 48 arctic plains 48 Ground penetrating radar 48 Kuiper belt 48 astronomical observations 48 Jupiter moons Europa 48 Pluto Charon 48 moondust 48 Martian gullies 48 Jakosky 48 undersea volcanoes 48 superfluids 48 astronomical objects 48 Landsat satellites 47 Fermi telescope 47 Snowball Earth 47 optical telescopes 47 meteoroid impacts 47 climate modellers 47 extrasolar planets orbiting 47 protoplanets 47 coronal loops 47 Dalcanton 47 Stephan Quintet 47 Endurance crater 47 KH #D 47 layered bedrock 47 Jean Luc Margot 47 telescopic observations 47 Kepler spacecraft 47 meteoroid 47 supercomputer simulations 47 called lobate scarps 47 geochronology 47 paleoclimatologists 47 Noctilucent clouds 47 subglacial lakes 47 lunar orbiters 47 Magnetars 47 exoplanets orbiting 47 isotopic compositions 47 Martian surface 47 proplyds 47 neutrino oscillation 47 Murchison meteorite 47 extragalactic 47 interstellar clouds 47 Mars 47 hydrothermal vent 47 dynamical evolution 47 faint galaxies 47 NASA Opportunity rover 47 outer planets 47 interplanetary dust 47 celled organisms 47 gamma ray observatory 47 stony meteorite 47 planetary transits 47 Saturn moon Enceladus 47 gamma ray telescope 47 nebulas 47 comets meteors 47 flood basalts 47 impactors 47 astrometry 47 Cosmic Microwave Background 47 orbiting Hubble Space Telescope 47 rock outcrop 47 galaxy formation 47 asteroid impacts 47 carbon cenospheres 47 geoneutrinos 47 interstellar dust particles 47 Miller Urey experiment 47 NASA Mars Reconnaissance 47 Mars moon Phobos 47 planetary embryos 47 Fuk Li Mars 47 Remote sensing 47 innermost planet 47 Astrophysicists 47 Galaxy Evolution 47 Martian crust 47 interstellar dust samples 47 lunar meteorite 47 asteroid Eros 47 moon Phobos 47 Extrasolar planets 47 super Earths 47 NASA twin rovers 47 KT boundary 47 HiRISE camera aboard 47 silicate mantle 47 Descent Imager Spectral Radiometer 47 gaseous planet 47 X ray telescopes 47 zircons 47 Nasa spacecraft 47 Bruce Jakosky 47 supermassive 47 COROT 7b 47 coccolithophores 47 equatorial latitudes 47 Syrtis Major 47 magnetic monopoles 47 Peony nebula star 47 baryonic matter 47 dromaeosaurs 47 Martian dust 47 evaporite deposits 47 penetrating radar 47 volcanic basalt 47 Upsilon Andromedae b 47 molten magma 47 mineralogical composition 47 exo planet 47 Plate tectonics 47 polar oceans 47 SN#A 47 faraway planets 47 volcanic moon Io 47 Earthly contamination 47 NASA Voyager spacecraft 47 graphite whiskers 47 planetary surfaces 47 terraforming Mars 47 Cassini flybys 47 CloudSat 47 subglacial 47 RS Ophiuchi 47 Svedhem 46 interstellar molecules 46 gamma ray telescopes 46 paleoecology 46 Sojourner rover 46 ray Space Telescope 46 called gray hematite 46 terra preta 46 microfossil 46 comet nucleus 46 inhabitable planets 46 Saturnian moon Titan 46 Greg Delory 46 cosmological theories 46 luminous galaxies 46 ejecta plume 46 cosmic microwave background 46 gamma ray detectors 46 type Ia supernova 46 Earth biosphere 46 martian 46 astronomical phenomena 46 Martian subsurface 46 protoplanetary discs 46 ostracods 46 synchrotron x ray 46 photosynthetic microbes 46 Lapen 46 fainter objects 46 extrasolar planet 46 jovian 46 millisecond pulsars 46 polar mesospheric clouds 46 protoplanetary disk 46 OMEGA instrument 46 MG J# +# 46 CoRoT satellite 46 NASA Wilkinson Microwave 46 planetesimals 46 astrophysical objects 46 assumed planets circling 46 Alfven waves 46 collisional 46 Transantarctic Mountains 46 cometary impacts 46 sedimentary rock 46 glacial geology 46 Fossilized bones 46 mud volcanoes 46 left handed isovaline 46 perchlorate salts 46 planets circling stars 46 Fermi Paradox 46 Mojzsis 46 Orbiter LRO 46 Opportunity rover 46 archaeo 46 BLG #Lb 46 basaltic rock 46 binary asteroids 46 astronomical telescope 46 BP Piscium 46 NASA rovers 46 cosmologists 46 Antennae Galaxies 46 noble gases 46 hydrothermal venting 46 Nectocaris 46 X ray binaries 46 Fashion Movie Reviews 46 equatorial regions 46 dust devils 46 habitable planets 46 radar altimetry 46 earthlike planets 46 astronomical observatories 46 chondritic 46 Wilkinson Microwave Anisotropy Probe 46 dustier stormier atmosphere 46 basalt volcanic 46 lake sediments 46 craters 46 AGNs 46 polarimetry 46 eccentric orbits 46 interstellar particles 46 geologically active 46 Mössbauer 46 robotic explorer 46 Jupiter moons 46 Mini SAR 46 XMM Newton 46 Mars Meridiani Planum 46 habitable worlds 46 Nasa Mars Reconnaissance 46 Cat Paw Nebula 46 Miniature Thermal Emission 46 Wolszczan 46 Martian 46 Pancam 46 Gliese #G 46 blue supergiant 46 magma boiling 46 Kuiper Belt objects 46 infrared spectrometers 46 melt inclusions 46 X ray spectrometer 46 forams 46 glacial moraines 46 Climate Experiment GRACE 46 smoothest flattest spot 46 observatories 46 Apollo astronauts 46 Galactic cosmic rays 46 Spitzer infrared spectrograph 46 fossilized dinosaur dung 46 geology paleontology 46 radioactive nuclei 46 Mars CRISM 46 inner asteroid belt 46 filamentary structures 46 metamorphic rock 46 moon Mab 46 Bug Nebula 46 Martian crater 46 retroreflector 46 Hubble astronomers 46 interstellar dust tiny 46 MARSIS radar 46 antineutrinos 45 fault scarps 45 visit http:/saturn.jpl.nasa.gov 45 type Ia supernovae 45 asteroid collisions 45 Cassini flyby 45 protoplanetary 45 G#.# +#.# 45 paleoclimate 45 geologic 45 particle astrophysics 45 ionized hydrogen 45 Elliptical galaxies 45 Submillimeter Array 45 icy crust 45 Mary Voytek 45 rover Sojourner 45 photosphere 45 faraway galaxies 45 HM Cancri 45 terraformed 45 Bonnie Buratti 45 extinct volcanoes 45 chemical abundances 45 Sasselov 45 VB #b 45 Dwarf galaxies 45 nebulae 45 Lowell Observatory 45 Astrological lore 45 martian soil 45 called gravitational microlensing 45 X ray emission 45 subterranean caves 45 Martian microbes exist 45 meteoroids 45 Great Observatories 45 cratered highlands 45 MARSIS 45 remotely sensed 45 shell middens 45 thermonuclear reactions 45 energetic cosmic rays 45 hexagonal mirrors 45 Trifid Nebula 45 galactic bulge 45 Tarantula Nebula 45 NASA satellites orbiting 45 silicate minerals 45 Orion nebula 45 planetary explorations 45 rotating neutron stars 45 moons Phobos 45 brown dwarfs 45 planets astronomers 45 palaeontology 45 SDSS II 45 atmospheric methane 45 exobiology 45 microfossils 45 Coma Cluster 45 HD #b [002] 45 Landsat satellite 45 Keck Interferometer 45 Kuiper belt object 45 finely layered 45 neutralinos 45 airbursts 45 biosignature 45 Hale Bopp 45 hematite 45 nucleobases 45 silicon monoxide 45 Kuiper Belt Object 45 X ray wavelengths 45 Ken Herkenhoff 45 hypervelocity stars 45 brightest supernova 45 Tagish Lake meteorite 45 creatures inhabiting 45 NASA Hubble Space 45 feathered dinosaurs 45 Chasma Boreale 45 Moon Mineralogy Mapper 45 layered outcrops 45 extraterrestrial visitation 45 Higgs bosons 45 V# Mon 45 rovers Spirit 45 LROC 45 planets 45 Goldilocks planet 45 plagioclase 45 Nasca Lines 45 intrinsic brightness 45 Ares Vallis 45 oxygen isotopes 45 neutrino detectors 45 igneous rock 45 satellite altimetry 45 lunar highlands 45 planet HD #b 45 P/# A2 45 tardigrades 45 galactic mergers 45 prebiotic soup 45 highly elliptical orbits 45 journal Meteoritics 45 Mossbauer spectrometer 45 Amateur astronomers 45 Jenniskens 45 radial velocity method 45 Planetary scientists 45 moon Io 45 Perseus Cluster 45 extrasolar planetary 45 evolutionary biologists 45 Global Surveyor spacecraft 45 supervolcanoes 45 dwarf galaxies 45 Viking Orbiter 45 aerosol particles 45 AB Aurigae 45 Lake Cheko 45 spinels 45 ESA Envisat satellite 45 subsurface geology 45 solar corona 45 Saturn magnetosphere 45 chromosphere 45 fluid inclusions 45 earths 45 Korotev 45 martian atmosphere 45 Mandushev 45 Optical Gravitational Lensing Experiment 45 ESA Integral 45 dinosaur specimens 45 robotic landers 45 sterile neutrinos 45 UFO phenomena 45 supergiants 45 moons circling 45 journal Icarus 45 cosmic dust 45 NASA Spirit rover 45 icy moon Enceladus 45 polar regions 45 planets comets 45 SMOS mission 45 Sushil Atreya 45 planetary astronomer 45 igneous rocks 45 Martian atmosphere 45 Keck Telescope 45 distant quasars 45 chemtrails 45 ULP cepheids 45 microlensing 45 globular clusters 45 Wolf Rayet stars 45 abyssal plains 45 Elysium Planitia 45 celestial bodies 45 biodiverse ecosystems 45 sulfur isotope 45 Mount Stromlo Observatory 45 Saturn moon Mimas 44 comet Wild 44 smallest exoplanets 44 globular star 44 planets orbiting 44 NASA Astrobiology Institute 44 moons orbiting 44 transiting planets 44 perchlorates 44 archeology anthropology 44 volcano Olympus Mons 44 volcanically active 44 strange quark 44 submarine volcanoes 44 basaltic lava 44 vulnerable thermal shielding 44 silicates 44 RXTE 44 coronal heating 44 Fred Hoyle 44 volcanism 44 THEMIS 44 presolar 44 spectral signatures 44 situ measurements 44 phlogiston 44 wrinkle ridges 44 interferometric technique 44 Mars Phobos 44 Diviner instrument 44 Lunar Prospector 44 solidified lava 44 exoplanet atmospheres 44 celestial phenomena 44 Balarat Project 44 scientists 44 Meteorites 44 paleobiology 44 elliptical galaxies 44 satellites orbiting Earth 44 astrophysical 44 planetoids 44 Kuiper Belt 44 supergiant stars 44 silicate grains 44 axial tilt 44 palaeontological 44 galactic nuclei 44 Martian soil 44 exoplanets 44 gravitational interactions 44 superstring theory 44 Scheila 44 extraterrestrial 44 olivine 44 occultations 44 comet 44 Orbiter MRO 44 classical antiquity 44 galaxies 44 Noachian 44 Jonathan Lunine Cassini 44 quasicrystals 44 Adam Riess 44 Spiral galaxies 44 planetary 44 multi celled 44 micrometeoroids 44 moonlet 44 Opportunity Mars rover 44 Comet Hartley 2 44 supernovas 44 planetary geology 44 Antarctica EPICA 44 robotic rovers 44 Krimigis 44 fossil specimens 44 Lunar Reconnaissance Orbiter Camera 44 SPICAM 44 Jupiter icy moons 44 Shackleton crater 44 olivine rich 44 orbiting gamma ray 44 southern supercontinent 44 ancient supercontinent 44 Moderate Resolution Imaging 44 Chajnantor 44 robotic rover Spirit 44 ultraviolet wavelengths 44 infrared observatory 44 airglow 44 Cassini Huygens spacecraft 44 Caloris 44 asteroid 44 cryptozoological 44 orbiting Saturn 44 Arabia Terra 44 sediments deposited 44 chemosynthetic 44 #P/Churyumov-Gerasimenko 44 Planitia 44 overlying layers 44 trans Neptunian 44 Gamburtsev 44 Virgo Cluster 44 anthropic 44 polar layered 44 HiRISE 44 Phoebe orbits 44 polar vortex 44 Rosetta lander 44 planetary scientist 44 Gliese #g 44 plate tectonics 44 tektites 44 MicroFUN 44 olivines 44 middens 44 Allende meteorite 44 ringed planet 44 missing baryons 44 Puijila 44 HD#b 44 X ray observatories 44 sulfate aerosols 44 Bok globules 44 Omega Centauri 44 crinoids 44 Laetoli 44 Comet Hale Bopp 44 meteoritic 44 moon Mimas 44 Higgs particle 44 cosmic ray observatory 44 presolar grains 44 supernova explosions 44 globular cluster 44 RQ# 44 paleontological dig 44 scarps 44 tyrannosaurids 44 telescopes 44 habitable zones 44 robotic lander 44 Red Rectangle 44 Jay Melosh 44 sea hydrothermal vents 44 distant galaxies 44 sulfur isotopes 44 sandstone spiers 44 O OREOS 44 solar neutrinos 44 VISTA telescope 44 nanobacteria 44 supersymmetric particles 44 magnetic substorms 44 pre biotic 44 sub glacial lakes 44 Bonneville Crater 44 moon Ganymede 44 binary quasar 44 geological strata 44 spectrographic 44 elliptical orbits 44 scramjets 44 Permian Period 44 Foing 44 calderas 44 Gerard Kuiper 44 VY Canis Majoris 44 infrared spectra 44 isotopic composition 44 geoglyphs 44 reentry capsule 44 Tunguska asteroid 44 carbon spherules 44 microhabitats 44 extra terrestial 44 ramidus 44 antiquities sleuth 44 Jupiter gravitational pull 44 mosasaurs 44 spectroscopic analysis 44 lunar dust 44 meteorite 44 crewed spacecraft 44 magmas 44 Mercury exosphere 44 trilobite fossils 44 spacecraft thrusters 44 outer corona 44 interacting galaxies 44 hydrothermal activity 44 HUDF 44 Comet Encke 44 ROSAT 44 SMBHs 44 planets moons 44 Cepheid variables 44 hypernova 44 EPOXI mission 44 Enceladus flybys 44 planets orbits 44 multicellular animals 44 Cassini 44 magnetite crystals 44 Spaceguard 44 Charon Pluto 44 single celled creatures 44 Huygens mission 44 NASA Cassini spacecraft 43 clathrates 43 Cancri e 43 Hadean 43 lunar surface 43 UA Lunar 43 lifeforms 43 Bob Pappalardo Cassini 43 iron oxides 43 eclipsing binaries 43 Tropical rainforests 43 geomicrobiology 43 Beta Pictoris b 43 observations 43 periodic dimming 43 dynamical processes 43 Diviner 43 pallasite 43 Neolithic Age 43 starburst galaxies 43 Explorer WISE 43 Tunguska Siberia 43 neutrino experiments 43 subseafloor 43 Keck Observatory 43 Landsat images 43 Phobos 43 Voyager probes