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(Click for frequent words.) 67 airglow 64 polar vortex 63 midlatitudes 63 altocumulus 63 cosmic ray intensity 62 axial tilt 62 cosmic ray flux 62 atmospheric circulations 62 Tharsis Rise 61 tectonic uplift 61 tropospheric 61 atmospheric convection 61 auroral activity 61 hydrosphere 60 polar latitudes 60 magnetospheric 60 Syrtis Major 60 coronal holes 60 retrograde orbit 60 downwelling 60 Ulysses spacecraft 60 volcanic plumes 60 spacecraft orbited 60 lunar equator 59 subsurface ocean 59 shadowed craters 59 glacial interglacial 59 albedo reflectivity 59 teleconnections 59 specular reflection 59 crustal thickness 59 lowermost mantle 59 atmospheric moisture 58 mantle convection 58 Rossby waves 58 mineral olivine 58 upper troposphere 58 tropopause 58 geothermal gradient 58 Late Paleozoic 58 poleward 58 Antarctic icecap 58 jovian 58 interplanetary magnetic 58 Mercury exosphere 58 exosphere 58 circumstellar disk 58 Ontario Lacus 58 HiRISE image 58 mesospheric 58 slender crescent 58 Cassini flyby 58 mid latitudes 57 substorm 57 planetary atmospheres 57 deep convective clouds 57 anticyclonic 57 Aram Chaos 57 stratospheric clouds 57 MG J# +# 57 polar mesospheric clouds 57 meridional 57 convective clouds 57 temperate latitudes 57 vorticity 57 retroreflector 57 Viking orbiters 57 multi decadal 57 thermal gradients 57 Hubble orbits 57 Saturn moon Mimas 57 McMurdo Dry Valleys 57 NASA rovers Spirit 57 Envisat ASAR 57 Quadrantid meteor shower 57 Antarctic stratosphere 57 planet magnetosphere 57 hydrologic cycle 56 lenticular clouds 56 VY Canis Majoris 56 magnetic polarity 56 circumstellar 56 meridional flow 56 Martian dust 56 Vertical wind shear 56 subpolar 56 tropical latitudes 56 Earth thermosphere 56 Amundsen Sea 56 thermal inertia 56 Noctilucent clouds 56 Eta Aquarid meteor shower 56 obliquity 56 basaltic rocks 56 poleward shift 56 glacial interglacial cycles 56 vegetation greenness 56 tropospheric temperature 56 subseafloor 56 Candor Chasma 56 filamentary structure 56 ocean eddies 56 lunar orbiters 56 Terra Meridiani 56 telescopic observations 56 polar craters 56 Noachian era 56 prograde 56 advection 56 coronal hole 56 Saturn Enceladus 56 permanently shadowed regions 56 magnetic substorms 56 cratered highlands 56 Yarkovsky effect 56 Mercury magnetosphere 56 permanently shadowed craters 56 Milankovitch cycles 56 rotational axis 56 ADM Aeolus 56 cryovolcanism 56 atmospheric oceanic 55 Cloudiness 55 galactic disk 55 sunglint 55 yardangs 55 Cryogenian 55 Gamma ray burst 55 Late Ordovician 55 lunar perigee 55 water vapor condenses 55 sulphate aerosols 55 photosphere 55 noctilucent clouds 55 occultations 55 northern arctic plains 55 cryosphere 55 Upsilon Andromedae 55 Orionids 55 albedo feedback 55 cratons 55 flood basalts 55 Planitia 55 Corot 9b 55 hydrothermal fluid 55 magnetotail 55 radiative transfer 55 chromosphere 55 comets orbiting 55 submillimetre wavelengths 55 Geminid 55 spacecraft flyby 55 radiative cooling 55 COROT 7b 55 Martian polar 55 Agulhas Current 55 Patagonian Andes 55 diurnal cycle 55 electron flux 55 zodiacal dust 55 polar stratospheric 55 lunar crust 55 biogeochemical 55 infall 55 Shackleton crater 55 elongated orbits 55 interannual 55 moon Io 55 thermal gradient 55 mesoscale 55 oceanic circulation 55 Tempel Tuttle 55 blue supergiant 55 paleomagnetic 55 Monsoonal 55 colder drier 55 Moisture laden 55 mesosphere 55 upper tropospheric 55 abyssal plain 55 polar plateau 55 kyr 55 Dust devils 55 cyclonic circulations 55 northerly latitudes 55 Kraken Mare 55 pericentre 55 glacier shrinkage 55 Martian dunes 55 Quadrantid 55 olivine mineral 54 Quadrantids 54 glaciological 54 heliospheric 54 Jupiter magnetosphere 54 Earth rotational axis 54 spatially resolved 54 longwave radiation 54 Hellas Basin 54 meteoritic material 54 GJ #b [002] 54 coronal loops 54 recurrent coronal hole 54 seabed sediments 54 orbital inclination 54 drier warmer 54 icesheets 54 Valles Marineris canyon 54 Comet 9P/Tempel 1 54 waning gibbous 54 hydrological cycle 54 windward slopes 54 Solar Dynamics Observatory 54 Jupiter Uranus 54 lithosphere 54 solar insolation 54 subglacial 54 evapo transpiration 54 cyclogenesis 54 ionized gases 54 auroral oval 54 iceberg calving 54 solar irradiance 54 sedimentary deposits 54 outer corona 54 geoid 54 interglacial periods 54 Valles Marineris 54 lunar craters 54 orographic 54 submicrometer 54 diffuse aurora 54 comet Tempel Tuttle 54 permafrost melts 54 climatic variations 54 midlatitude 54 aeolian 54 infalling gas 54 galactic equator 54 cyclicity 54 helicity 54 glacier calving 54 Fram Strait 54 planets orbits 54 stratocumulus clouds 54 Saturnian 54 Polar Regions 54 southern latitudes 54 Jovian moons 54 moon Dione 54 Cosmic ray 54 aerosol concentrations 54 Jupiter moon Io 54 anomalously warm 54 chlorophyll concentrations 54 Lake Yoa 54 active volcanism 54 ecliptic plane 54 Comet Hartley 2 54 zodiac constellations 54 overlying layers 54 constellation Eridanus 54 smoggy atmosphere 54 Brigham Grette 54 comet orbit 54 stellar occultation 54 Seismicity remains 54 Fossae 54 comet orbital 54 prevailing westerly winds 54 Gusev crater 54 Aqua satellite 54 Huygens descent 54 cirrus cloud 54 THEMIS Image 54 extrasolar 54 Comet Encke 54 synchronous orbit 54 Moderate Resolution Imaging 54 crustal movements 54 auroral displays 54 geyser plumes 54 geomagnetic field 54 prominences 54 coronal loop 54 coastal upwelling 54 equatorial regions 54 Nili Fossae 54 Earth orbiting satellites 54 phreatic 54 intraplate 53 Siberian Traps 53 supercooled liquid 53 Saturn Cassini 53 equatorial Pacific 53 Comet Tempel Tuttle 53 Fermi telescope 53 temperature gradients 53 arcsecond 53 Venusian atmosphere 53 isotope fractionation 53 perihelion 53 thin crescent 53 dynamical processes 53 springtime ozone 53 Saturnian moon Titan 53 gamma ray observatory 53 Isidis Planitia 53 TrES 4 53 energetic electrons 53 volcano Olympus Mons 53 shadowy craters 53 colder denser 53 Barometric pressure 53 mineralogical composition 53 rotating counterclockwise 53 Magellanic Stream 53 binary asteroid 53 Atlantic meridional overturning 53 neutrino mass 53 sulfate aerosols 53 Eta Aquarids 53 orbital eccentricity 53 Samuel Oschin Telescope 53 Cosmic Microwave Background 53 geomagnetic activity 53 asthenosphere 53 Earth ionosphere 53 celestial equator 53 temporal variability 53 air advection 53 barometric pressures 53 dry airmass 53 Kuiper belt objects 53 circumstellar disks 53 atmospheric methane 53 planet Gliese #g 53 polarimetric 53 AIRS instrument 53 Comet Halley 53 magnetopause 53 Sermilik Fjord 53 explosive volcanism 53 chlorophyll fluorescence 53 collisional 53 terrestrial biosphere 53 icy moons 53 El Niño Southern Oscillation 53 polar caps 53 Global Precipitation Climatology 53 hypersonic speeds 53 Ares Vallis 53 Delta Cephei 53 Fomalhaut b 53 planetary transits 53 Arabia Terra 53 proto planetary disk 53 Jakobshavn Isbrae 53 solar prominences 53 basaltic lava 53 ENSO cycle 53 gravitational interaction 53 Cassini flybys 53 moons Phobos 53 rotating neutron stars 53 geological timescales 53 post perovskite 53 La Nià ± 53 volcanic moon Io 53 Siple Dome 53 extratropical cyclones 53 plasmasphere 53 WISE telescope 53 neutrino experiments 53 Earths crust 53 altitudinal 53 Alaskan glaciers 53 interannual variability 53 SST anomalies 53 Manned missions 53 Olympus Mons 53 Saturnian moon 53 Great Conveyor Belt 53 microwave remote sensing 53 boreal regions 53 lunar highlands 53 YORP effect 53 APXS 53 Swift Tuttle 53 convective storms 53 evaporite 53 martian atmosphere 53 Comet Machholz 53 #P/Churyumov-Gerasimenko 53 relativistic particles 53 IBEX spacecraft 53 Caloris 53 subalpine meadows 53 Orbiter MRO 53 magnetic dipole 53 Madden Julian Oscillation 53 grabens 53 solar radii 53 coolings 53 ionized particles 53 Phanerozoic 53 strontium isotope 53 fluid viscosity 53 Saharan dust 53 eruptive activity 53 Geminid meteors 53 reduce visibilities 53 elevational 53 mesocyclone 53 abyssal plains 53 particle acceleration 52 solar minima 52 electromagnetic flux 52 spatial variability 52 Southern Annular Mode 52 Saharan Dust 52 MARSIS instrument 52 supercooling 52 Earth radii 52 millimeter wavelengths 52 cometary impacts 52 planets Uranus 52 phyllosilicates 52 upwellings 52 Geminid shower 52 stony meteorites 52 Whillans Ice Stream 52 waning gibbous moon 52 bottomhole pressure 52 produce colorful auroras 52 Comet NEAT 52 deglaciation 52 Orientale Basin 52 gamma ray flashes 52 Mössbauer 52 Orionid 52 moon Mimas 52 superluminal 52 monsoonal moisture 52 southwestward 52 sextile 52 glacier melts 52 sunward 52 erosional 52 Southern Oscillation 52 recrystallized 52 shaded craters 52 Bonneville Crater 52 THEMIS Images 52 #.#nm [002] 52 warmer wetter 52 Lake Untersee 52 Galactic cosmic rays 52 multidecadal 52 WISE spacecraft 52 mid Pliocene 52 Milankovitch 52 hydrological cycles 52 tides currents 52 GJ#b 52 Svaliava 52 katabatic winds 52 NASA satellites orbiting 52 zodiacal light 52 Cygnus Lyra region 52 Meridiani 52 Cassini Image 52 latitudes 52 HiRISE camera 52 arctic plains 52 ENAs 52 cometary debris 52 piezoelectric properties 52 waxing crescent 52 X ray afterglow 52 constellation Hercules 52 Last Glacial Maximum 52 Norris Geyser Basin 52 solar corona 52 polar icecap 52 Maastrichtian 52 comets asteroids 52 phyllosilicate 52 Atlantic Multidecadal Oscillation AMO 52 interplanetary magnetic field 52 phytoplankton biomass 52 Bonnie Buratti 52 Helheim glacier 52 ocean basins 52 Solar TErrestrial RElations Observatory 52 laser altimeter 52 geodynamic 52 periodicities 52 overspreading 52 Muchachos Observatory 52 gravitational acceleration 52 gravitational pulls 52 condensation nuclei 52 Venusian 52 lunar regolith 52 subtropical gyre 52 magmatism 52 atmospheric haze 52 climatologically 52 northwesterly flow 52 silicate dust 52 Earth biosphere 52 cenospheres 52 NASA QuikScat satellite 52 silicate rocks 52 Uranus Jupiter 52 interstellar dust grains 52 planetary surfaces 52 Garrick Bethell 52 Warmer oceans 52 electron density 52 Grímsvötn volcano 52 Paleocene Eocene 52 permafrost thaws 52 elliptical orbits 52 cometary dust 52 orbital resonance 52 TONIGHT Scattered showers 52 starlike object 52 protoplanetary 52 distant supernovae 52 protoplanetary discs 52 sediments deposited 52 ejecta plume 52 Geomagnetic 52 Diviner instrument 52 equatorial Pacific Ocean 52 Gakkel Ridge 52 magma chambers 52 Orion nebula 52 hematite mineral 52 celestial phenomena 52 austral summer 52 thermally induced 52 irradiance 52 trigger scattered showers 52 Regolith 52 talus slopes 52 penumbral shadow 52 magma ocean 52 convective 52 moons Europa 52 La Nina occurs 52 Snake River Plain 52 orbital velocity 52 spectroscopic measurements 52 planetary magnetospheres 52 Chajnantor plateau 52 infrared spectral 51 isotherm 51 Pleiades cluster 51 evaporite deposits 51 Imaging Spectroradiometer MODIS instrument 51 Doppler shift 51 electron diffusion 51 easterly winds blowing 51 Uranus Neptune 51 Endurance crater 51 Oceanus Procellarum 51 outer heliosphere 51 moon Enceladus 51 waning crescent Moon 51 gravitational keyhole 51 Palaeozoic sedimentary 51 Pacific Decadal Oscillation PDO 51 permanently shadowed crater 51 Super Earths 51 galactic cosmic rays 51 icecaps 51 galactic magnetic 51 radar altimetry 51 ejecta blanket 51 Leonid meteor 51 diurnal variation 51 Orcus Patera 51 electrons positrons 51 oxygen isotopic 51 moon gravitational pull 51 Sinus Meridiani 51 MJO wave 51 interstellar cloud 51 noctilucent cloud 51 microphysical 51 Tharsis 51 layered outcrops 51 interstellar clouds 51 Plate tectonics 51 spectrometric 51 FAR WEST TEXAS 51 EPOXI spacecraft 51 Jupiter icy moons 51 subtropical oceans 51 geosynchronous Earth 51 sunlike stars 51 Seafloor 51 Vastitas Borealis 51 micro meteorites 51 nicknamed Bonneville 51 silicon monoxide 51 situ measurements 51 stratus clouds 51 inhabitable planets 51 KAGUYA 51 star Spica 51 tropical troposphere 51 dissolved oxygen pH 51 basaltic magma 51 umbral 51 lobate scarps 51 volcanic ridges 51 hydrograph 51 Planck satellite 51 spectral characteristics 51 paleoclimatic 51 Mössbauer spectrometer 51 comet Lulin 51 ocean sediment cores 51 lithium bearing brines 51 Dr Trewin 51 vapor condenses 51 radial velocity 51 Appy Sluijs 51 boreal ecosystems 51 rotating updraft 51 infrared satellite imagery 51 outlet glaciers 51 minus #degC 51 ARPES 51 Laptev Sea 51 lunar magma 51 Atlantic Multidecadal Oscillation 51 continental rifting 51 layered bedrock 51 Geminid Meteor Shower 51 foehn 51 cloud microphysics 51 yr -1 51 mid tropospheric 51 spirals inward 51 Coma Cluster 51 IRC +# 51 planet Gliese #c 51 polarimetry 51 bedrock outcrops 51 Cassini Finds 51 Mercury flyby 51 earths surface 51 abyssal 51 tidally 51 waxing gibbous 51 moisture condenses 51 Pavonis Mons 51 SeaWiFS 51 melting snowpacks 51 tundra vegetation 51 Upsilon Andromedae b 51 sub glacial lakes 51 moonquakes 51 isotherms 51 Kuiper Belt Objects 51 glaciers recede 51 Saturnian moons 51 Orionid Meteor Shower 51 highly elliptical orbit 51 smallest exoplanet 51 maneuvering thrusters 51 Martian terrain 51 interplanetary spacecraft 51 radar interferometry 51 Subduction zones 51 Shepherding Spacecraft 51 planetary Transits 51 celestial sphere 51 total solar irradiance 51 sun irradiance 51 Substorms 51 temperature gradient 51 anthropogenic aerosols 51 Alfven waves 51 interstellar dust clouds 51 infrared spectra 51 mantle plumes 51 Thermal Emission Spectrometer 51 Galileo spacecraft 51 extraterrestrial UFOs 51 Tectonic plates 51 ion thrusters 51 lander solar panels 51 cloudcover 51 CoRoT 9b 51 Mars Orbiter 51 HF propagation 51 permafrost degradation 51 exoplanetary 51 magnetic dynamo 51 thermosphere 51 velocity dispersion 51 Jurassic sandstone 51 Antarctic Dry Valleys 51 Tonight Cloudy 51 Geologically speaking 51 Titan smoggy 51 equatorial waters 51 surface temperatures SSTs 51 heavily cratered 51 leach kinetics 51 cometary material 51 isostatic 51 synchrotron emission 51 Martian volcanoes 51 nebular 51 Comet Hartley 51 lava tubes 51 windblown sand 51 earthshine 51 moon Deimos 51 Cenozoic 51 atmospheric aerosol 51 relativistic speeds 51 Orionid meteors 51 System #L 51 sedimentological 51 subterranean caves 51 seafloor sediments 51 deserts jungles 51 oceanic plates 51 stellar occultations 51 accretion disks 51 remote sensing instruments 51 Martian rovers 50 Particle acceleration 50 weathermen predicting 50 subglacial lakes 50 polar layered 50 Chilean Atacama Desert 50 Earth magnetosphere 50 precessing 50 magnetic reconnection 50 chlorine monoxide 50 Lyrid meteor shower 50 twin rover Spirit 50 cinder cones 50 sub tropic 50 geoeffective 50 lacustrine 50 Saturn moons Enceladus 50 thermal diffusivity 50 Paleogene 50 lunar meteorites 50 electron ion 50 Velicogna 50 gibbous 50 geomagnetic 50 foreland 50 Indian Ocean Dipole 50 Neogene 50 leeward slopes 50 distant supernovas 50 GALEX 50 spinning clockwise 50 van Arkel discovery 50 #.#C #.#C 50 Earth asteroids NEAs 50 Mars Meridiani Planum 50 spectral measurements 50 Tibetan Plateau 50 El Niño winters 50 rubbly 50 Ice Ages 50 Bug Nebula 50 Reiner Gamma 50 dynamical evolution 50 Cerro Pachon 50 recrystallization 50 filamentary structures 50 aurorae 50 Saharan Desert 50 protoplanets 50 Aurigid 50 crystalline silicates 50 constellation Auriga 50 Bill Patzert climatologist 50 Kelvin Helmholtz 50 microwave radiometers 50 tidal bulge 50 eastern equatorial Pacific 50 chondrules 50 Stratospheric ozone 50 Jonathan Lunine 50 Kepler 9c 50 shallowing 50 polar orbiting satellites 50 radial velocities 50 Descent Imager Spectral Radiometer 50 isotope composition 50 thrust faulting 50 Surface Composition Spectrometer 50 moons orbiting 50 basalt lava 50 thawed permafrost 50 Earth magnetotail 50 NEAs 50 fine grained sediment 50 dip shallowly 50 Kelvin -# 50 Nasa spacecraft 50 Orionid meteor shower 50 ultraviolet radiation emitted 50 equatorial orbit 50 Solar Terrestrial Physics 50 El Chichon 50 oceanic currents 50 planets atmospheres 50 cumulus cloud 50 atmospheric phenomena 50 waning crescent 50 hydrated silica 50 temperature barometric pressure 50 Athabasca Valles 50 dewpoint temperature 50 constellation Taurus 50 Earth axial tilt 50 nimbus clouds 50 waxing gibbous moon 50 insolation 50 meteorite impacts 50 sunspot cluster 50 WEATHER Mostly sunny 50 CMB radiation 50 X ray emitting 50 sagged southward 50 SCIAMACHY 50 Io volcanoes 50 Cometary 50 Noachian 50 Aqua satellites 50 Shackleton Crater 50 Neptune Uranus 50 micrometre sized 50 whiz harmlessly 50 globular cluster M# 50 Chryse Planitia 50 azimuthal 50 atmospheric aerosols 50 Landsat satellites 50 Mars Uranus 50 Banerdt 50 carbonate minerals 50 Perseus constellation 50 EL Nino 50 Toutatis 50 sulfur isotopes 50 MODIS instrument 50 constellation Aquarius 50 micron wavelengths 50 #.#C #.#F [003] 50 tectonically active 50 Jupiter Ganymede 50 harmful ultraviolet UV radiation 50 Soil Moisture 50 astrometry 50 meteoroid impacts 50 graphite whiskers 50 eccentric orbits 50 heavily instrumented 50 lensing galaxy 50 scarps 50 backscattered 50 WMAP satellite 50 synchrotron x ray 50 Herschel Crater 50 galactic halo 50 fading afterglow 50 penetrating radar 50 nanomesh 50 Horsehead Nebula 50 Current Warm Period 50 undersea volcanoes 50 wavefront distortion 50 Chasma Boreale 50 warm interglacial periods 50 Mount Bosavi 50 reflection nebula 50 polynya 50 thermal infrared 50 Ocean Salinity 50 Express orbiter 50 Mazatzal 50 Composite Infrared Spectrometer 50 Sromovsky 50 El Nino Southern Oscillation 50 hydroxyl molecules 50 periodic dimming 50 bedrock outcropping 50 arcseconds 50 magnetic excitations 50 asteroidal 50 Transantarctic Mountains 50 gravitational tugs 50 Michelson interferometer 50 atmospheric opacity 50 troposphere 50 cirrus clouds 50 shear modulus 50 weak gravitational lensing 50 circular orbits 50 Pleistocene Ice Age 50 Abnormally dry 50 NASA ICESat 50 Oort Cloud 50 Ringed Planet 50 anthropogenic carbon dioxide 50 constellation Centaurus 50 wavelength infrared 50 Andean snowmelt 50 Eemian 50 Tycho supernova remnant 50 upper elevations 50 Alycia Weinberger 50 benthic foraminifera 50 NGC #A 50 Fig. 4A 50 Opportunity Mars rover 50 radiosondes 50 erupt explosively 50 martian surface 50 windblown dust 50 neutrino detectors 50 Doppler shifts 50 latitudinal 50 zodiacal constellations 50 brownish haze 50 TODAY Showers 50 interstellar dust 50 olivines 50 lapilli 50 incandescent lava 50 glacial melt 50 Mission SRTM 50 geomorphic 50 icesheet 50 Bok globules 50 atmospheric CO2 levels 50 sunspot cycle 50 Seismicity 50 ESA Envisat satellite 50 hydrocarbon reservoirs 50 duststorms 50 cosmic ray particles 50 gaseous methane 50 Advanced Microwave Scanning 50 thruster firings 50 PANHANDLE soil 50 ejecta 50 Venusian surface 50 Mars Color Imager 50 Socompa 50 Trifid Nebula 50 ITCZ 50 backscattering 50 biogeochemical processes 50 overlying sediments 50 Nubian Desert 50 NASA THEMIS 50 Rosette Nebula 50 2 MeV electron 50 equatorial belt 50 nebulosity 50 lava flowed 50 oscillation amplitude 50 Triangulum 50 Landsat satellite 50 frigid arctic 50 geosynchronous orbits 50 Explorer WISE 50 infrared wavelength 50 comet McNaught 50 melting polar icecaps 49 sedimentary layers 49 icy crust 49 Jupiter flyby 49 sized planets orbiting 49 orbited Jupiter 49 Shallower 49 geoelectric 49 Neoproterozoic 49 TRMM satellite 49 Comet LINEAR 49 water vapor