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(Click for frequent words.) 63 icecaps 63 polar regions 63 subsurface ocean 62 polar icecaps 62 mid latitudes 61 icesheets 61 permanently shadowed craters 61 glaciers 60 subglacial lakes 60 polar icecap 60 polar craters 60 Rossby waves 60 Syrtis Major 60 lunar crust 60 shadowed craters 59 hydrological cycle 58 cryovolcanism 58 albedo 58 magma ocean 58 glacial melt 58 polar vortex 58 subglacial 58 Greenland ice 58 greenhouse warming 58 polar ice 58 midlatitudes 58 Velicogna 57 Hellas Basin 57 landforms 57 mountain glaciers 57 Corot 7b 57 oceanic circulation 57 icy moons 57 Amundsen Sea 57 moon Enceladus 57 exosphere 57 hydrologic cycle 57 sediments deposited 57 polar oceans 56 McMurdo Dry Valleys 56 molten magma 56 Laurentide ice sheet 56 phyllosilicates 56 permanently shadowed regions 56 magnetotail 56 atmospheric circulation 56 stratospheric ozone 56 glacial meltwater 56 atmospheric methane 56 Polar Regions 56 receding glaciers 56 hydrosphere 56 basaltic rocks 56 magnetic polarity 56 smoggy atmosphere 56 icecap 56 axial tilt 56 cryosphere 56 permafrost thaws 56 volcanism 56 lunar craters 56 photosphere 56 Tharsis Rise 55 Greenland icesheet 55 Ontario Lacus 55 Earthlike 55 meteor impacts 55 active volcanism 55 ammonia hydrates 55 Jupiter moons Europa 55 oceans 55 Venusian atmosphere 55 NASA QuikScat satellite 55 Meridiani 55 aerosol particles 55 heavily cratered 55 moon gravitational pull 55 polar 55 Martian dust 55 Eemian 55 Galilean moons 55 Warmer oceans 55 planets atmospheres 55 hydrated minerals 55 Martian surface 55 atmospheric CO2 levels 55 cirrus clouds 55 Greenland glaciers 55 water vapor 55 extrasolar 55 coronal loops 55 Cosmic Microwave Background 55 Last Glacial Maximum 55 cometary impacts 54 polar latitudes 54 GJ #b [002] 54 earthshine 54 cosmic ray flux 54 solar irradiance 54 gaseous planet 54 moulins 54 airglow 54 Himalayan Glaciers 54 anthropogenic warming 54 jovian 54 Maunder minimum 54 interstellar dust grains 54 silicate rocks 54 Antarctic glaciers 54 mantle convection 54 sedimentary deposits 54 lavas 54 glacial melting 54 Arctic icecap 54 sheet Summerhayes 54 mesosphere 54 VY Canis Majoris 54 Alfven waves 54 icesheet 54 clathrates 54 sub glacial lakes 54 Noctilucent clouds 54 Greenland icecap 54 Cassini flyby 54 KBOs 54 lunar poles 53 ejecta 53 Kuiper Belt Objects 53 Arctic permafrost 53 galactic cosmic rays 53 supervolcanoes 53 sunlike stars 53 Fomalhaut b 53 atmospheric carbon dioxide 53 solar nebula 53 interglacial periods 53 warmings 53 Jupiter moon Io 53 teleconnections 53 silicates 53 chromosphere 53 icy crust 53 Rignot 53 equatorial regions 53 retrograde orbit 53 habitable zones 53 celestial bodies 53 protoplanetary disks 53 ocean salinity 53 Martian craters 53 Noachian 53 tropopause 53 Quaoar 53 lithosphere 53 tholins 53 Saturn Enceladus 53 earths 53 Vastitas Borealis 53 sunspots 53 mantle plumes 53 equatorial latitudes 53 permafrost 53 Saturnian moon 53 Otto Bliesner 53 circumstellar disks 53 methane hydrates 53 meteorite impacts 53 iceberg calving 53 GJ#b 53 Milankovitch cycles 53 Snowball Earth 53 hydrothermal activity 53 Upsilon Andromedae b 53 equatorial bulge 53 permanently shadowed 53 methane clathrates 53 permafrost melts 53 planet magnetosphere 53 deglaciation 53 Lake Vostok 53 rotational axis 53 lenticular clouds 53 magnetic substorms 53 Siple Dome 52 interstellar clouds 52 isotopic composition 52 melting glaciers 52 meteoritic material 52 sulfate aerosols 52 Jovian moon 52 glaciers melting 52 Antarctic icecap 52 Gusev crater 52 Diviner 52 tropical glaciers 52 yardangs 52 planets orbiting stars 52 HiRISE image 52 abyssal plain 52 Antarctic ice 52 Aram Chaos 52 glaciations 52 fainter objects 52 KT boundary 52 moon Europa 52 glaciers melt 52 spacecraft flyby 52 mineralogical composition 52 Earthlike planets 52 coccolithophores 52 upwellings 52 shadowy craters 52 seabed sediments 52 melting icebergs 52 missing baryons 52 asthenosphere 52 isotopic ratios 52 accretion disks 52 sunspot activity 52 glaciation 52 Saturnian moons 52 paleomagnetic 52 Corot 9b 52 atmospheric CO2 52 melting permafrost 52 Saturn moon Enceladus 52 Alaskan glaciers 52 Martian gullies 52 speleothems 52 Lake Untersee 52 lava flowing 52 poleward 52 atmospheric aerosols 52 cosmic microwave background 52 equatorial Pacific Ocean 52 luminous galaxies 52 albedo reflectivity 52 tidally 52 downwelling 52 Martian atmosphere 52 Kuiper belt objects 52 Arabia Terra 52 X ray emission 52 lunar meteorites 52 dynamical processes 52 upper troposphere 52 climate modelers 52 martian atmosphere 52 tropospheric 52 thermal inertia 52 deep convective clouds 52 Konrad Steffen 52 gaseous planets 52 distant supernovae 52 moons Phobos 52 flood basalts 52 chondrules 52 comet nuclei 52 glacial ice 51 Jonathan Lunine 51 moonquakes 51 Upsilon Andromedae 51 meridional flow 51 exoplanets orbiting 51 Valles Marineris 51 Gravitational waves 51 aurorae 51 moonlets 51 radar altimetry 51 Himalayan river basins 51 mineral olivine 51 icy comets 51 planets circling stars 51 alpine glaciers 51 Fram Strait 51 outlet glaciers 51 stratospheric ozone depletion 51 Earthlike planet 51 Dry Valleys 51 ocean basins 51 Lake Yoa 51 Martian polar 51 icy moon Enceladus 51 gravitational interaction 51 carbon dioxide concentrations 51 glacial retreat 51 stony meteorites 51 seafloor sediments 51 Mars Squyres 51 Earth ionosphere 51 climate modellers 51 Martian meteorites 51 terrestrial ecosystems 51 Iapetus 51 Sinus Meridiani 51 CMB radiation 51 Saturn magnetosphere 51 moon Mimas 51 greenhouse gas concentrations 51 Goldilocks zone 51 sulfate salts 51 sulphate aerosols 51 rocky planets 51 visible wavelengths 51 Oort Cloud 51 subtropical oceans 51 martian meteorites 51 atmospheric circulations 51 abyssal plains 51 boreal regions 51 meteoroids 51 Antarctica 51 Neukum 51 plate tectonics 51 hydroxyl molecules 51 Arsia Mons 51 Greenland Antarctica 51 proplyds 51 moons orbiting 51 thermohaline circulation 51 temperature gradients 51 Ken Herkenhoff 51 Greenland Ice 51 AB Aurigae 51 Diviner instrument 51 WASP #b 51 terrestrial planets 51 midlatitude 51 lava tubes 51 comets asteroids 51 solar corona 51 Gabriel Vecchi 51 subglacial lake 51 Tibetan Plateau 51 CO2 concentrations 51 HD #b [002] 51 Great Conveyor Belt 51 Palaeocene Eocene Thermal Maximum 51 Di Achille 50 distant supernovas 50 carbonate minerals 50 troposphere 50 NSIDC 50 Goldilocks planet 50 polynya 50 noctilucent clouds 50 thermosphere 50 landmasses 50 baryonic matter 50 Saturn moons 50 extrasolar planet 50 Planitia 50 stratospheric clouds 50 geomorphology 50 magnetic monopoles 50 atmospheric CO 50 X ray wavelengths 50 earths surface 50 species extinctions 50 glacier 50 lunar soil 50 merging galaxies 50 planets 50 auroral activity 50 Mauna Kea Hawaii 50 meltwater 50 magnetosphere 50 ozone depletion 50 permafrost soils 50 heliospheric 50 northern arctic plains 50 Enceladus 50 geologically active 50 atmospheric oceanic 50 olivines 50 Amundsen Sea Embayment 50 Cassini radar 50 phyllosilicate 50 Mud volcanoes 50 gyres 50 sulphate particles 50 aerosol concentrations 50 IRC +# 50 masers 50 COROT 7b 50 Himalaya glaciers 50 astronomical objects 50 Olympus Mons 50 planet HD #b 50 relativistic particles 50 Jovian moons 50 glaciers retreated 50 chlorine monoxide 50 Cryogenian 50 lava flowed 50 HiRISE images 50 jet contrails 50 Cassini imaging 50 silicate dust 50 planet Gliese #g 50 Gliese #c 50 thawing tundra 50 dirty snowballs 50 shrinking glaciers 50 Serreze 50 oxygen isotope 50 Wolszczan 50 jarosite 50 Alpine glaciers 50 martian surface 50 Laurentide Ice Sheet 50 undersea volcanoes 50 lensing galaxy 50 Antarctic Dry Valleys 50 Caloris 50 elongated orbits 50 Mawrth Vallis 50 optical wavelengths 50 spectroscopic measurements 50 Melting glaciers 50 P/# A2 50 chondritic 50 interglacial period 50 Hot Jupiters 50 lunar magma 50 anomalously warm 50 chondrites 50 HD#b 50 Io volcanoes 50 phytoplankton blooms 50 planets orbits 50 tectonic uplift 50 Isabella Velicogna 50 methane clathrate 50 Rayleigh scattering 50 heliosphere 50 polarimetry 50 Nili Fossae 50 volcanic magma 50 telescopic observations 50 shaded craters 50 mountain snowpacks 50 Nares Strait 50 moons Europa 50 cosmological distances 50 boreal ecosystems 50 Ulysses spacecraft 50 Eric Rignot 50 silicate mantle 50 glacier melting 50 extrasolar planets 50 Composite Infrared Spectrometer 50 Extrasolar planets 49 Zeebe 49 Stratospheric ozone 49 reef habitats 49 biosignatures 49 Michael Studinger 49 Paleocene Eocene 49 Saturn rings 49 surface temperatures SSTs 49 SN #gy 49 Kilimanjaro glaciers 49 forcings 49 periodic dimming 49 constellation Eridanus 49 atmospheric ozone 49 Martian volcanoes 49 glacier melt 49 magmas 49 melting glacial 49 lunar perigee 49 planet habitability 49 melting polar icecaps 49 protoplanetary disk 49 Candor Chasma 49 Io Europa 49 X ray telescopes 49 Mercury magnetosphere 49 sulphates 49 coronal loop 49 Gamma ray burst 49 Fossae 49 exo planets 49 oceanic currents 49 emits X rays 49 comets orbiting 49 Saturn moon 49 biogeochemical processes 49 microbialites 49 spiral nebulae 49 convective 49 anthropogenic CO2 emissions 49 interannual variability 49 overlying layers 49 anthropogenic carbon dioxide 49 galactic alignment 49 glacier shrinkage 49 Bug Nebula 49 radioactive nuclei 49 abyssal 49 supercontinents 49 crustal rocks 49 ejecta blanket 49 plankton blooms 49 marine sediments 49 cosmic ray intensity 49 tidewater glaciers 49 lunar highlands 49 disappearing glaciers 49 Neptune Uranus 49 planet Uranus 49 slender crescent 49 basalt volcanic 49 Wilkinson Microwave Anisotropy Probe 49 paleoclimatic 49 atmospheric concentrations 49 Sunspots 49 Manned missions 49 silicon monoxide 49 oxidized mercury 49 atmospheric chemistry 49 sulfate minerals 49 sedimentary layers 49 Patagonian glaciers 49 Caloris Basin 49 interstellar dust 49 interstellar boundary 49 tidal bulge 49 innermost planet 49 outer corona 49 magnetic reconnection 49 climatic variations 49 spatially resolved 49 sulfur isotope 49 prebiotic molecules 49 Martian subsurface 49 von Frese 49 volcanic plumes 49 circumstellar disk 49 habitable planet 49 planets comets 49 spherules 49 transiting planets 49 comet orbit 49 continental crust 49 glaciers retreating 49 meteorite bombardment 49 retreating glaciers 49 cirrus cloud 49 Hellas Planitia 49 Galilean satellites 49 planetary geologists 49 protoplanet 49 Cassini scientist 49 Chasma Boreale 49 Lunine 49 ancient supercontinent 49 ultraviolet wavelengths 49 El Niños 49 ocean currents 49 permafrost degradation 49 vortices 49 Mercury exosphere 49 planetary atmospheres 49 hydrothermal fluid 49 blue supergiant 49 Mandushev 49 Saturn auroras 49 refugia 49 Cat Paw Nebula 49 Shackleton crater 49 lava flows 49 aragonite 49 noble gases 49 Saturnian moon Titan 49 nightglow 49 submillimeter 49 CoRoT 9b 49 isostatic rebound 49 ionized particles 49 Atlantic meridional overturning 49 lobate scarps 48 interstellar dust clouds 48 icefields 48 glacier melts 48 TrES 4 48 smoothest flattest 48 sterile neutrino 48 Oort cloud 48 basaltic lava 48 advection 48 Henize #-# 48 Bruce Jakosky 48 Latady Island 48 Martian landscape 48 multi decadal 48 collisional 48 planet 48 earthlike planets 48 aerosols 48 ocean acidity 48 asteroidal 48 iron oxides 48 Muchachos Observatory 48 zodiacal light 48 hot Jupiters 48 planetesimals 48 Pacific Decadal Oscillation 48 infrared spectra 48 Permian extinction 48 albedo feedback 48 Arctic oscillation 48 VB #b 48 Scambos 48 subsurface 48 ecliptic plane 48 paleoclimate 48 Qinghai Tibet plateau 48 waning crescent 48 smallest exoplanet 48 journal Meteoritics 48 elemental abundances 48 runaway greenhouse 48 Robert Bindschadler 48 latitudes 48 GZK cutoff 48 magnetite crystals 48 comet nucleus 48 Kasei Valles 48 tropospheric ozone 48 layered outcrops 48 circumstellar 48 Molnia 48 APXS 48 galaxy redshift 48 planemos 48 Chicxulub 48 hematite mineral 48 ocean acidification 48 arctic permafrost 48 carbonate globules 48 isotopic compositions 48 tectonic activity 48 constellation Pisces 48 polar mesospheric clouds 48 Puijila 48 comets 48 hydrated silica 48 erosional 48 Martian equator 48 climatic variability 48 cosmic phenomena 48 Hongbin Qu chief 48 Sr Ca 48 distant galaxies 48 silicate minerals 48 ice nucleation 48 GtC 48 sulfate aerosol 48 glacier calving 48 primordial ingredients 48 Pavonis Mons 48 intrinsic brightness 48 Mini SAR 48 arctic plains 48 glacial cycles 48 magnetospheres 48 prominences 48 anthropogenically 48 volcanic activity 48 cyanobacterial blooms 48 Saturnian 48 comet 48 Martian dunes 48 Doppler shifts 48 neutrino detectors 48 Titan smoggy 48 volcanic moon Io 48 MODIS 48 cometary dust 48 GJ #b [001] 48 osmium 48 Sromovsky 48 subpolar 48 VIRTIS 48 La Niñas 48 obliquity 48 melting 48 extrasolar planetary systems 48 glaciers receded 48 Kelvin -# 48 tectonic plate movements 48 filamentary structure 48 Martian crust 48 OMEGA instrument 48 anthropogenic aerosols 48 Martian permafrost 48 Banerdt 48 sulfide minerals 48 southern latitudes 48 stalagmites 48 Geminga 48 Orionids 48 super Earths 48 La Niña pattern 48 Transantarctic Mountains 48 supercooled liquid 48 Saturn moons Enceladus 48 journal Geophysical Research 48 icebergs 48 tropical troposphere 48 Jakobshavn Isbrae 48 protoplanetary discs 48 oxygen isotopes 48 magnetospheric 48 dust devils 48 gaseous methane 48 infall 48 earthlike 48 amplifying feedbacks 48 coastal upwelling 48 astrophysical 48 Omega Centauri 48 occultations 48 Arctic Ocean 48 paleoclimate records 48 moon Io 48 evapotranspiration 48 crustal 48 Ares Vallis 48 palaeo 48 superluminal 48 volcanic eruptions 48 Kuiper belt 48 laser altimeter 48 Agulhas Current 48 Explosive eruptions 48 cratons 48 coolings 48 asteroids comets 48 spatial variability 48 Weddell Sea 48 lake sediments 48 Earth 48 SN #A 48 Methane hydrates 48 Gas hydrates 48 antarctic 48 Athabasca Valles 48 mass extinctions 48 substorm 48 biogeochemical cycles 48 constellation Aquarius 48 penetrating radar 48 Chryse Planitia 48 volcanoes erupt 48 observable universe 48 Imbrium 48 Orcus Patera 48 lowermost mantle 48 deepwater corals 48 Siberian Traps 48 seafloors 48 Libra constellation Vogt 47 spicules 47 cosmic rays 47 snowcaps 47 polar layered 47 acidifying oceans 47 -# degrees Fahrenheit [002] 47 stellar seismology 47 glacial interglacial 47 giant gaseous planets 47 geoid 47 dustier stormier atmosphere 47 Ice Ages 47 proto planetary disk 47 Boreal forests 47 crystalline silicates 47 ENSO cycle 47 Josefino Comiso 47 Behrenfeld 47 methane concentrations 47 Earth magnetosphere 47 graphite whiskers 47 gas hydrates 47 fissure eruption 47 planetary embryos 47 paleoclimatology 47 martian 47 celestial phenomena 47 Glaciers 47 wispy cirrus clouds 47 superstorms 47 Einar Kjartansson geophysicist 47 Earth axial tilt 47 accretion disk 47 astronomical observations 47 diffuse aurora 47 Hesperian epoch 47 anthropogenic greenhouse gases 47 Fashion Movie Reviews 47 interstellar medium 47 sediment cores 47 Phoebe orbits 47 katabatic winds 47 spherically symmetric 47 biospheric 47 volcanoes 47 subarctic 47 substorms 47 calderas 47 elliptical galaxies 47 thawing permafrost 47 volcanic aerosols 47 OGLE TR #b 47 faint galaxies 47 millimeter wavelengths 47 submillimeter wavelength 47 thermal gradients 47 Antarctic Ice 47 equator 47 oligotrophic 47 forams 47 volcano Olympus Mons 47 Terra Sirenum 47 evaporite deposits 47 Compact Reconnaissance Imaging Spectrometer 47 warmer wetter winters 47 submillimeter galaxies 47 magma 47 Valles Marineris canyon 47 RRATs 47 planetary nebulae 47 ESA Envisat satellite 47 terrestrial biosphere 47 scarps 47 volcanic vents 47 forecaster Helen Chivers 47 superfluidity 47 dense clumps 47 tropical latitudes 47 X ray binaries 47 Halemaumau 47 planet orbiting 47 Ian McShane Pillars 47 ammonia hydrate 47 ALH# 47 Oceanus Procellarum 47 auroral 47 sunspot cluster 47 thermonuclear reactions 47 Mini TES 47 carbon fluxes 47 Isidis Planitia 47 dimming starlight 47 meridional overturning circulation 47 electron neutrinos 47 potentially habitable planets 47 neutrino mass 47 star Spica 47 Garrick Bethell 47 moon Titan 47 NASA Cassini spacecraft 47 dusty disks 47 ultraviolet radiation emitted 47 water vapor condenses 47 stellar occultations 47 Andromeda galaxy 47 proto planetary disks 47 Gerald Meehl 47 springtime ozone 47 Appy Sluijs 47 hydrologist Carolyn Driedger 47 auroral displays 47 Veil Nebula 47 journal Icarus 47 MG J# +# 47 habitable planets 47 geomagnetic field 47 Mate Adamkovics 47 magnetotactic bacteria 47 towering icebergs 47 sunspot cycles 47 HiRISE camera 47 planets astronomers 47 gravitational perturbations 47 algal mats 47 Jay Zwally 47 Galileo spacecraft 47 Comet Machholz 47 specular reflection 47 orbital resonance 47 radiative 47 galactic equator 47 Siberian permafrost 47 Tharsis 47 Gliese #d 47 Orbiting Carbon Observatory OCO 47 planets orbiting distant 47 Europa Ganymede 47 polynyas 47 supersymmetric particles 47 NCAR scientist 47 temperature reconstructions 47 supercontinent 47 Sara Seager 47 amplification Zwally 47 volcanoes spewing 47 planet Gliese #c 47 unicellular algae 47 gravitational lens 47 cratered highlands 47 gigatonnes 47 aboard ESA Envisat 47 cinder cones 47 temporal variability 47 SeaWiFS 47 igneous rocks 47 ocean upwelling 47 microplastics 47 Carina constellation 47 perihelion 47 assumed planets circling 47 AGNs 47 drumlins 47 energetic electrons 47 greatest insect emergences 47 galaxy M# [001] 47 Ozone depletion 47 gamma ray emitting 47 magma chambers 47 cometary 47 interstellar cloud 47 Alycia Weinberger 47 microlensing events 47 fault scarps 47 Hawking Radiation 47 volcanic basalt 47 astrobiologists 47 MARSIS 47 sundog 47 ionosphere 47 Paleocene Eocene Thermal Maximum 47 galactic bulge 47 Vatnajökull 47 zodiacal dust 47 inhabitable planets 47 crustal thickness 47 glacial interglacial cycles 46 infrared telescopes 46 Holocene epoch 46 NASA WMAP 46 Earth asteroids NEAs 46 glaciers melted 46 AU Mic 46 melt glaciers 46 Envisat ASAR 46 liquid ethane 46 blocks harmful ultraviolet 46 Nielsen Gammon 46 concretions 46 solar minima 46 Little Ice Age 46 Hale Bopp 46 atmospheric phenomena 46 Surface Composition Spectrometer 46 geomorphic 46 volcanically active 46 SSTs 46 cometary material 46 Mount Kilimanjaro glaciers 46 ultraviolet UV radiation 46 single celled creatures 46 Jellyfish swarm northward 46 Martian arctic 46 poleward shift 46 planets Uranus 46 Alfvén waves 46 Perseus Cluster 46 waxing gibbous moon 46 temperature gradient 46 latitudinal 46 atmospheric moisture 46 biosphere 46 magnetopause 46 Antarctic Peninsula 46 Medieval Warming Period 46 moon Phobos 46 mammal extinctions 46 Magellanic Clouds 46 Mojzsis 46 anthropogenic 46 ppmv 46 extratropical cyclones 46 Sermilik Fjord 46 interferometric synthetic aperture radar 46 extrasolar planets orbiting