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(Click for frequent words.) 73 geologically active 64 Jupiter moon Io 62 Syrtis Major 61 active volcanism 61 active volcanoes 61 Ontario Lacus 61 Olympus Mons 61 Hellas Basin 61 Corot 7b 61 Valles Marineris 60 active volcanos 59 tectonically active 59 cryovolcanism 59 Pavonis Mons 59 Nili Fossae 59 stratovolcano 59 basaltic rocks 58 Arsia Mons 58 Explosive eruptions 58 Fomalhaut b 58 supervolcanoes 58 moons orbiting 58 Shiveluch 57 smallest exoplanet 57 calderas 57 permanently shadowed craters 57 volcanism 57 Earthlike 57 icy moons 57 extinct volcanoes 57 sunlike stars 57 permanently shadowed 57 subsurface ocean 57 Siberian Traps 57 undersea volcanoes 57 Upsilon Andromedae 56 interstellar boundary 56 moon Io 56 volcanic arcs 56 volcanic craters 56 hydrothermal vent 56 GJ#b 56 supervolcano 56 Yellowstone caldera 56 Arabia Terra 56 eruptive activity 56 fissure eruption 56 auroral displays 56 Mount Bosavi 55 seismically active regions 55 Galilean satellites 55 Samuel Oschin Telescope 55 extrasolar 55 cratons 55 mud volcanoes 55 Hawaii Mauna Kea 55 BLG #Lb 55 cinder cones 55 heavily cratered 55 volcanoes 55 mantle plumes 55 HD#b 55 Corot 9b 55 moon Enceladus 55 carbonaceous chondrite 55 GJ #b [001] 55 Kepler #b 55 Saturn moon Enceladus 55 Sparsely populated Iceland 55 tectonic faults 55 volcanic activity 54 tectonically 54 Lake Untersee 54 Kuiper belt 54 volcanic 54 Llaima 54 solar corona 54 AU Mic 54 magmas 54 Tharsis Montes 54 Cerro Paranal 54 SN #gy 54 coldest driest 54 flood basalts 54 oceanic crust 54 Upsilon Andromedae b 54 gaseous planet 54 caldera 54 El Teide 54 Saturn Enceladus 54 continental crust 54 Kuiper Belt Object 54 polar vortex 54 CoRoT 7b 54 Saturn moons 54 brightest supernova 54 Palaeozoic sedimentary 54 Aram Chaos 54 Tharsis Rise 54 gaseous planets 54 Kermadec Arc 54 Saturnian moons 54 Hydrothermal vents 54 driest deserts 54 cluster NGC 54 seismically active zones 54 Candor Chasma 54 biologically diverse regions 53 glaciated 53 Cat Paw Nebula 53 X ray emission 53 circum Pacific 53 Volcanic eruptions 53 mineralogical composition 53 hydrosphere 53 lava flowed 53 Dry Valleys 53 Gliese #c 53 erupt explosively 53 airglow 53 Oort cloud 53 biodiverse regions 53 geologically unstable 53 smallest exoplanets 53 Fermi telescope 53 Quaoar 53 Venusian atmosphere 53 photosphere 53 hydrated minerals 53 Omega Centauri 53 HL Tau 53 Earthlike planet 53 mu Arae 53 Shinmoedake 53 chromosphere 53 Gliese #g 53 hematite mineral 53 Karangetang 53 oceanic trenches 53 neutrino telescope 53 Beta Pictoris b 53 Virgo Cluster 53 underwater volcanoes 53 lunar crust 53 thermal vents 53 exoplanetary 53 V# Mon 53 exosphere 53 Lake Vostok 53 CoRoT 9b 53 COROT 7b 53 atop Mauna Kea 53 biologically diverse 53 Chilean Atacama Desert 53 explosive eruptions 53 Coma Cluster 53 Bug Nebula 53 supergiant star 53 Sarychev Peak 53 Pu'u O'o 53 volcanic vents 53 sub glacial lakes 53 magma chambers 52 Jovian moon 52 smoothest flattest 52 Transantarctic Mountains 52 Carina Nebula 52 lava tubes 52 Martian polar 52 transiting planets 52 moon Titan 52 coronal mass ejections CMEs 52 moonquakes 52 Perseus Cluster 52 jovian 52 Cancri e 52 meteorite impacts 52 ostracods 52 stellar occultations 52 Mount Katla 52 Oort Cloud 52 asteroids orbiting 52 constellation Virgo 52 Mount Tambora 52 dormant volcanoes 52 lunar craters 52 CoRoT satellite 52 Enceladus 52 magma ocean 52 Manned missions 52 Gakkel Ridge 52 lunar perigee 52 intraplate 52 Ngauruhoe 52 subglacial 52 Norris Geyser Basin 52 cratered highlands 52 magmatic 52 TrES 4 52 Muchachos Observatory 52 cosmic ray observatory 52 abyssal plain 52 planets orbiting sun 52 hydrothermal fluid 52 Yellowstone Caldera 52 constellation Eridanus 52 comet nuclei 52 Geminid shower 52 silicate rocks 52 tropopause 52 Terra Meridiani 52 occultations 52 moons Io 52 extrasolar planetary systems 52 Wolf Rayet stars 52 Pluto Charon 52 Mariana Arc 52 Tarantula nebula 52 hydrothermal activity 52 Terra Sirenum 52 Mauna Kea volcano 52 Beta Pictoris 52 sized planets orbiting 52 mesosphere 52 Yellowstone supervolcano 52 lunar equator 52 Martian volcanoes 51 Europa Ganymede 51 lava flows 51 Gusev crater 51 retrograde orbit 51 Galilean moons 51 RS Ophiuchi 51 tectonic plates collide 51 southern supercontinent 51 Elysium Planitia 51 habitable zones 51 Mount Karthala 51 Mount Soputan 51 shadowy craters 51 Large Magellanic Cloud 51 moons Phobos 51 Pavlof 51 planets astronomers 51 Nyiragongo 51 Mauna Kea Hawaii 51 moon Mimas 51 Neptune Uranus 51 basalt volcanic 51 aurorae 51 Sakurajima 51 WASP #b 51 ocean ridges 51 Shackleton crater 51 Vatnajökull 51 lithosphere 51 HARPS spectrograph attached 51 McMurdo Dry Valleys 51 innermost planet 51 Hellas Planitia 51 seafloor sediments 51 KBOs 51 spews ash 51 Mount Karangetang 51 magnetospheric 51 Katla volcano 51 Gamma ray bursts 51 protoplanetary disks 51 Earthlike planets 51 igneous rocks 51 Toba eruption 51 seamount 51 underwater volcanos 51 phyllosilicates 51 orbiting Saturn 51 Phoebe orbits 51 fumaroles 51 AB Aurigae 51 potentially habitable 51 called gravitational microlensing 51 volcanoes erupt 51 Eta Carinae 51 Antarctic Dry Valleys 51 magmatism 51 igneous 51 Kepler 9c 51 equatorial regions 51 MG J# +# 51 cataclysmic eruption 51 mantle convection 51 Southern Oscillation 51 subtropical regions 51 supervolcano eruption 51 Orcus Patera 51 Ithaca Chasma 51 Quadrantids 51 sunspot cluster 51 Tarantula Nebula 51 radial velocity method 51 mega vertebrate 51 basalts 51 El Chichon 51 planets orbiting stars 51 explosive volcanism 51 Piton de la 51 gravitational microlensing 51 distant supernovas 51 magnetic substorms 51 volcanic peaks 51 Fashion Movie Reviews 51 magnetic reconnection 51 Valles Marineris canyon 51 brown dwarf 51 Jupiter Ganymede 51 Kuiper belt objects 51 Halemaumau 51 biodiversity hotspot 51 Cumbre Vieja 51 Chazy Reef 51 silicic 51 planet Gliese #c 51 extrasolar planet 51 volcanic caldera 51 primitive meteorites 51 subduction zones 51 Geologically speaking 51 Lava flows 51 Kuiper Belt 51 Nankai Trough 51 -# degrees Fahrenheit [002] 50 inner Oort Cloud 50 filamentary structures 50 Haumea 50 midlatitudes 50 Epsilon Eridani 50 heliopause 50 AGNs 50 undersea volcanic 50 Shackleton Crater 50 Paleogene 50 substorms 50 Orion nebula 50 HARPS instrument 50 lunar meteorites 50 hydrothermal 50 TrES 50 inhabitable planets 50 Eruptive activity 50 mid latitudes 50 gamma ray observatory 50 shifting tectonic plates 50 Caloris 50 oligotrophic 50 Jovian moons 50 ESO Paranal Observatory 50 Nyamulagira 50 Kilauea summit 50 Subduction zones 50 protoplanetary 50 ALH# 50 Sedna 50 thermally mature 50 Cancri 50 Lagoon Nebula 50 glacially carved 50 Middle Awash 50 infrared spectral 50 crustal movements 50 HIP #b 50 Kuiper belt object 50 Saturn moon 50 planet Gliese #g 50 exo planets 50 carbonaceous chondrites 50 super Earths 50 Arches Cluster 50 seismically active 50 comets orbiting 50 Saharan Desert 50 Jupiter icy moons 50 Chicxulub 50 diffuse aurora 50 Aristarchus 50 Lyrids 50 lavas 50 asteroids comets 50 shadowed craters 50 Chicxulub Crater 50 basaltic 50 luminous galaxies 50 neutron spectrometer 50 sedimentary rock 50 Krafla 50 exoplanets orbiting 50 rocky planets 50 P/# A2 50 circumstellar disks 50 Orionids 50 Paranal Observatory 50 USArray 50 Eyjafjallajokull Volcano 50 supergiant stars 50 clathrates 50 Neogene 50 ocean basins 50 red supergiant 50 constellation Ursa Major 50 Stephan Quintet 50 magnetar 50 Antennae Galaxies 50 Deccan Traps 50 Shatsky Rise 50 Geminga 50 solar insolation 50 icy moon Enceladus 50 extrasolar planets 50 VB #b 50 Geologically 50 constellation Sagittarius 50 Lengai 50 past boninite lavas 50 karsts 50 Io Europa 50 KT boundary 50 ULIRGs 50 Gamburtsev 50 Observatory telescope 50 located atop Mauna 50 lowermost mantle 50 Veniaminof 50 subglacial lakes 49 THEMIS Image 49 phyllosilicate 49 Mount Unzen 49 gravitationally bound 49 planet HD #b 49 HD #b [002] 49 supercontinent 49 nebula 49 orbital eccentricity 49 Toutatis 49 VY Canis Majoris 49 Fornax cluster 49 volcanic islands 49 Grímsvötn volcano 49 submarine volcanoes 49 UDFy # 49 axial tilt 49 Comet Holmes 49 Laurasia 49 Kuiper Belt object 49 Red Rectangle 49 Kraken Mare 49 crustal 49 evaporite deposits 49 barred spiral galaxy 49 inner asteroid belt 49 constellation Carina 49 eccentric orbits 49 grizzlies roam 49 upwellings 49 Gliese #d 49 E ELT 49 Pan STARRS PS1 telescope 49 constellation Centaurus 49 HESS telescopes 49 Tropical rainforests 49 lava spewing 49 carbonate minerals 49 anorthosite 49 volcanic vent 49 Gravitational waves 49 Oceanus Procellarum 49 equatorial 49 Kuiper Belt Objects 49 olivine mineral 49 Martian meteorites 49 radar altimetry 49 constellation Andromeda 49 noctilucent clouds 49 GJ #b [002] 49 Trifid 49 autonomous Xinjiang Uyghur 49 seismologically active 49 X ray spectrometer 49 layered sedimentary rock 49 spectral fingerprint 49 iridium layer 49 circumstellar disk 49 Rano Raraku 49 constellation Taurus 49 Kirishima range 49 trans Neptunian objects 49 geologically 49 cosmic ray intensity 49 erupting lava 49 magma chamber 49 unaided eye 49 magma boiling 49 gamma ray burst 49 Titan Saturn 49 planets orbits 49 erosional 49 planets asteroids 49 cinder cone 49 Polar Regions 49 Earth crust 49 CoRoT #b 49 glaciers retreated 49 Goldilocks zone 49 hydrothermal vents 49 exoplanetary systems 49 asteroidal 49 Norway Svalbard 49 volcanic eruptions 49 Submillimeter Array 49 proplyds 49 ecoregions 49 Mauna Loa volcano 49 polar regions 49 Saturnian moon 49 circumstellar 49 biosignatures 49 InSAR 49 amphibolites 49 Pyroclastic flows 49 galaxy M# [002] 49 conodonts 49 Hematite Slope 49 Cosmic Microwave Background 49 Chajnantor plateau 49 galaxy NGC 49 Liang Bua 49 HiRISE image 49 giant gaseous planets 49 magnetars 49 Lake Vui 49 nebular 49 Geminid 49 Iapetus 49 optical telescope 49 molten magma 49 Paleocene Eocene Thermal Maximum 49 tectonic plate boundaries 49 moonlet 49 collisional 49 Cumbre Vieja volcano 49 Saturn Cassini 49 Kechika Trough 49 aerosol concentrations 49 Montezuma Peak 49 star Fomalhaut 49 RRATs 49 gray hematite 49 reionization 49 Cerro Armazones 49 Fomalhaut 49 Augustine Volcano 49 volcanic crater 49 Libra constellation Vogt 49 bird watcher paradise 49 extragalactic 49 protoplanetary discs 49 zodiacal light 49 radioactive nuclei 49 geodynamic 49 Socompa 49 CAIs 49 constellation Hercules 48 magnetosphere 48 Neoproterozoic 48 Alfven waves 48 supernova remnant 48 Mawrth Vallis 48 telescope atop Mauna 48 eolian 48 polar mesospheric clouds 48 GRB #B 48 Orion Nebula 48 Kuiper Belt objects 48 dormant volcano 48 planets orbiting distant 48 galaxy cluster 48 permafrost thaws 48 plate tectonics 48 Chajnantor 48 Epsilon Aurigae 48 PSR B# +# 48 Comet NEAT 48 Kilauea caldera 48 polar stratospheric 48 biodiverse 48 volcanic mudflows 48 planet orbits 48 outer corona 48 constellation Pisces 48 X ray binaries 48 Petit Piton 48 supernova explosion 48 earth crust 48 Ground penetrating radar 48 REE bearing 48 Roque de los 48 Qinghai Tibetan plateau 48 tectonic activity 48 grabens 48 Neutron stars 48 planets circling stars 48 dust enshrouded 48 Gondwanaland 48 ecliptic plane 48 Mars Meridiani Planum 48 Colima volcano 48 SNR #-#.# 48 Eagle Nebula 48 pyroxene 48 constellation Lyra 48 biodiverse ecosystems 48 semidesert 48 gamma rays emitted 48 megacryometeor 48 Grímsvötn 48 terrestrial planets 48 Jupiter moons Europa 48 sedimentary deposits 48 hydrothermal springs 48 Snake River Plain 48 extinct volcano 48 spewed ash 48 G#.# +#.# 48 gravitational interaction 48 Very Large Telescope 48 Amundsen Sea 48 mineral olivine 48 supernovae explode 48 El Nino Southern Oscillation 48 TGFs 48 volcanic lava flows 48 Magnetars 48 optical telescopes 48 Optical Gravitational Lensing Experiment 48 martian meteorites 48 layered bedrock 48 atmospheric methane 48 Goldilocks planet 48 electron neutrinos 48 steam eruptions 48 binary asteroids 48 upper troposphere 48 Pu ` 48 hydrothermal venting 48 Venusian surface 48 microlensing 48 deepwater corals 48 meridional flow 48 magnetic polarity 48 Earth radii 48 super perigee moon 48 dimming starlight 48 coral atoll 48 infrared telescopes 48 komatiites 48 permanently shadowed regions 48 geothermal gradient 48 quartz feldspar porphyries 48 Bedout 48 Quadrantid meteor shower 48 Galactic cosmic rays 48 X ray observatories 48 Napau Crater 48 HiRISE images 48 ancient supercontinent 48 Grimsvötn volcano 48 Microlensing 48 gravitational tides 48 seabed sediments 48 Triangulum Galaxy 48 ionized hydrogen 48 REE enriched 48 volcano Mount Merapi 48 single celled microorganisms 48 Tony Bayaoa whose 48 Earthquake swarms 48 NASA QuikScat satellite 48 Permian extinction 48 SN #A 48 Eyjafjallajokull glacier erupted 48 Hesperian Epoch 48 Eyjafjallajökull glacier 48 Meridiani 48 Cerro Pachon 48 seamounts 48 methane CH4 48 ESO Very Large Telescope 48 Kilauea Iki 48 crustal plate 48 polar craters 48 deep convective clouds 48 submillimeter 48 electron diffusion 48 Lophelia 48 imaging spectrometer 48 molten rocks 48 submillimetre 48 Nankai Trough Zone 48 Tempel Tuttle 48 Aqua satellite 48 Maui Haleakala 48 distant quasars 48 cave stalagmites 48 constellation Aquarius 48 methane hydrate 48 Lake Myvatn 48 single celled algae 48 zodiac constellations 48 Carina constellation 48 quartz adularia 48 Lo'ihi 48 Fimmvorduhals 48 habitable planets 48 mass beachings 48 globulars 48 chondrites 48 sauropod skulls 48 Tuamotu Archipelago 48 lensing galaxy 48 Heliospheric Observatory SOHO 48 magnetotail 48 spiral galaxy NGC 48 spews lava 48 sulfur isotope 48 Volcanism 48 Fimmvorduhals volcano 48 stratigraphic sequence 48 antineutrinos 48 warmings 48 Cygnus Lyra region 48 orbiting gamma ray 48 Crozet Islands 47 Teton Fault 47 volcanic plumes 47 planetary nebulae 47 planemos 47 seismic activity 47 protoplanet 47 lobate scarps 47 Mars Squyres 47 Sumatra Andaman earthquake 47 nocturnal primate 47 Kilauea Volcano 47 antineutrino 47 microbialites 47 called lobate scarps 47 sun corona 47 planets comets 47 ESA XMM Newton 47 branching corals 47 magma erupts 47 Cerro Tololo 47 ° C warmer 47 economically exploitable 47 palm groves cacti 47 cryosphere 47 troposphere 47 siliciclastic 47 hot springs geysers 47 substorm 47 limestone karsts 47 constellation Libra 47 orbited Jupiter 47 smallest extrasolar planet 47 NASA twin rovers 47 Rossby waves 47 heavily instrumented 47 Cenozoic Era 47 glaciations 47 Alpine Fault 47 tholins 47 cosmic cannibal 47 coral habitats 47 orogenic 47 Milankovitch cycles 47 silica breccia 47 VISTA telescope 47 landforms 47 lunar poles 47 moon Ganymede 47 coronal holes 47 Eyjafjoell volcano 47 La Silla Observatory 47 Puu Oo 47 found circling Gliese 47 Sunspots 47 Cabeus 47 Chaitén volcano 47 temperate rainforest 47 Mount Rinjani 47 stromatolite 47 Hawaiian Volcano Observatory 47 microbial ecosystems 47 subpolar 47 QQ# 47 moon Mab 47 orbits Saturn 47 Newberry Volcano 47 slight uplifts 47 earliest hominid 47 sunspot cycle 47 Bouvet Island 47 planet orbiting 47 isotopic ratios 47 temperate forests 47 dustier stormier atmosphere 47 Martian crust 47 ignimbrite 47 XMM Newton 47 ah dus 47 rifting 47 constellation Cetus 47 hydrothermally 47 Vatnajokull glacier 47 basalt 47 intermediate metavolcanic rocks 47 supercontinent Pangaea 47 megathrust earthquake 47 Pleiades cluster 47 Eridanus 47 Kamoamoa eruption 47 planet Uranus 47 yardangs 47 Saturn rings 47 Ratdomopurbo 47 Laramidia 47 constellation Lacerta 47 solar nebula 47 fringing reef 47 ejecta 47 active galactic nuclei 47 Nankai trough 47 Ring Nebula 47 volcanic archipelago 47 Gliese #G 47 Planitia 47 Keck telescopes 47 radial velocity 47 stony meteorites 47 zodiacal dust 47 radial velocity technique 47 gamma ray emitting 47 Cryogenian 47 Shuttle Radar Topography 47 Orion constellation 47 Scientists theorized 47 North Anatolian Fault 47 basalt flows 47 cometary debris 47 Grimsvoetn 47 exoplanet 47 seafloor methane 47 RHESSI 47 Lake Cheko 47 subseafloor 47 brown dwarfs 47 ash billowing 47 periodic dimming 47 silicate minerals 47 Comet Hale Bopp 47 temperamental Soufriere Hills 47 brightest comet 47 spherically symmetric 47 Methone 47 weakly interacting 47 Sicily Mount Etna 47 Kelud 47 Tharsis 47 exoplanets planets 47 Loihi 47 paleomagnetic 47 Noctilucent clouds 47 subduction fault 47 OGLE TR #b 47 exo planet 47 quartz feldspar porphyry intrusive 47 Permian Triassic 47 Deseado Massif 47 ammonia hydrates 47 active galactic nucleus 47 Kilauea volcano 47 refugium 47 large oceanic plateaus 47 sediments deposited 47 ejecta blanket 47 COROT exo 3b 47 Veil Nebula 47 tectonic plate boundary 47 tectonic belts 47 protoplanetary disk 47 distant galaxy 47 stromatolites 47 moon Europa 47 Nasca Lines 47 katabatic winds 47 olivine crystals 47 planets orbiting 47 elongated orbits 47 species Ardipithecus ramidus 47 Icadyptes 47 volcanos 47 spew lava 47 volcanically 47 trans Neptunian 47 Borealis basin 47 Interferometer VLTI 47 constellation Cassiopeia 47 Wassonite 47 lunar highlands 47 Mandushev 47 La Silla observatory 47 constellation Cygnus 47 metallogenic belt 47 binary asteroid 47 Halema'uma'u 47 hydroxyl molecules 47 astronomical objects 47 sulfate minerals 47 fainter objects 47 deepest freshwater 47 carbonatites 47 University Lamont Doherty 47 lava domes 47 Niclas Henricson head 47 Llaima volcano 47 planets Uranus 47 Chicxulub crater 47 mantis shrimps 47 energetic electrons 47 interstellar clouds 47 hydrologist Carolyn Driedger 47 permanently shadowed crater 47 astronomers 47 abyssal plains 47 bedrock outcrops 47 X ray wavelengths 47 Jonathan Lunine 47 silicate dust 47 auroral 47 auroral emissions 47 Archaean 47 constellation Scorpius 47 Bok globules 47 gamma ray emission 47 biogeographical 47 geologic 47 X ray Observatory 47 lava tube 47 YORP effect 47 teragrams 47 galaxy M# [001] 47 paleoclimate 47 penetrating radar 47 meteorite crater 47 ancient lava flows 47 erupting volcanoes 47 Lake Enriquillo 47 Trifid Nebula 47 blue supergiant 47 Chaiten volcano 47 snowcapped volcano 47 Jupiter moons 46 protons collide 46 Hot Jupiters 46 constellation Pegasus 46 mudpots 46 Lake Toba 46 moonlets 46 Saturn moons Titan 46 Solar TErrestrial RElations Observatory 46 Orientale Basin 46 Sable Gully 46 Gamma rays 46 WM Keck Observatory 46 heliosheath 46 Nihoa Island 46 Spitzer Space Telescope 46 jarosite 46 Yellowstone geysers 46 lunar meteorite 46 Karthala 46 binary quasar 46 Crater Rim Drive 46 andesitic rocks 46 Rosette Nebula 46 megafloods 46 arid Atacama Desert 46 planetesimal 46 teleconnections 46 distant supernovae 46 Arecibo radar 46 Betelgeuse