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(Click for frequent words.) 67 Caloris Basin 65 ejecta blanket 63 Ithaca Chasma 61 mirrorlike 61 Syrtis Major 61 Candor Chasma 60 Borealis basin 60 Ares Vallis 60 Kraken Mare 60 hummocks 60 HiRISE image 60 nebula NGC 60 Oceanus Procellarum 59 Caloris 59 Shackleton crater 59 cinder cones 59 basalt cliffs 58 jovian 58 Horsehead Nebula 58 circumstellar disk 58 cumulus cloud 58 basaltic lava 58 Valles Marineris canyon 58 Saturnian moons 57 Reiner Gamma 57 circumstellar 57 windblown sand 57 erosional 57 Gusev crater 57 lunar equator 57 moon Io 57 Veil Nebula 57 Arsia Mons 57 Terra Sirenum 57 gnarled oak 57 Martian dunes 57 Martian craters 57 Lagoon Nebula 56 martian landscape 56 zodiacal light 56 Valles Marineris 56 fault scarps 56 lenticular clouds 56 nebulosity 56 basalt rock 56 VY Canis Majoris 56 lunar maria 56 deeply incised 56 circumstellar dust 56 volcanic caldera 56 sunglint 56 moon Mimas 56 Earths crust 56 Fomalhaut b 56 yardangs 56 Martian crust 56 Elysium Planitia 56 massifs 56 Hellas Basin 56 Pavonis Mons 56 polar craters 56 Planitia 56 crustal plate 56 inverted cone 55 tufa towers 55 reflection nebula 55 isosceles triangle 55 hummocky 55 Saturn moon Mimas 55 circular depressions 55 basalt rocks 55 Chryse Planitia 55 starscape 55 lunar craters 55 Martian volcanoes 55 cometary debris 55 Trifid Nebula 55 pitchblende mineralization 55 cumulous clouds 55 conic 55 lunar highlands 55 asteroidal 55 martian rocks 55 specular reflection 55 solidified lava 55 Ontario Lacus 55 tadpole shaped 54 seafloors 54 lunar crust 54 planets orbits 54 lava tubes 54 aeromagnetic anomaly 54 Saturnian moon 54 coronal loops 54 Imbrium 54 brownish haze 54 cinder cone 54 Melas Chasma 54 Fossae 54 volcanic tuff 54 granite outcropping 54 dolerite 54 airglow 54 Olympus Mons 54 rills 54 basaltic rocks 54 dust mote 54 Martian dust 54 lobate 54 cosmic collisions 54 dense clumps 54 radially outward 54 planets asteroids 54 gaseous planet 54 thin crescent 54 Tarantula nebula 54 McMurdo Dry Valleys 54 Upsilon Andromedae b 54 nautilus shell 54 ancient lava flows 54 volcanic lava flows 54 receding glacier 54 pinwheel shaped 53 subterranean caves 53 comma shaped 53 Racetrack Playa 53 Martian terrain 53 rocky headlands 53 Jupiter moon Io 53 GJ #b [001] 53 Eagle Nebula 53 Martian equator 53 sundog 53 Puu Oo 53 whaleback 53 hydrated silica 53 heavily cratered 53 stalactite 53 Ius Chasma 53 graceful curving 53 craggy granite 53 Bonneville Crater 53 Steep slopes 53 tawny hills 53 fingerlike 53 abyssal plain 53 lapilli 53 Spitzer infrared spectrograph 53 spiral galaxy M# 53 flood basalts 53 Shackleton Crater 53 Dumbbell Nebula 53 spiral galaxy NGC 53 Arabia Terra 53 Saturn outermost 53 planet magnetosphere 53 Tharsis Rise 53 TrES 4 53 lava eruptions 53 pumice plain 53 Orion nebula 53 solar prominences 53 glacially carved 53 Nazca lines 53 lensing galaxy 53 subsurface geological 53 corrugations 53 limestone outcrops 53 planetary surfaces 53 horizontal slits 53 sargassum weed 53 Guatemala sinkhole 53 ocher walls 53 GJ#b 53 sloping terrain 53 dragonfly wings 53 Orcus Patera 53 Isidis Planitia 53 pediment gravels 52 Tarantula Nebula 52 cirrus cloud 52 polar vortex 52 rock outcrop 52 volcano Olympus Mons 52 ejecta plume 52 claystone 52 earths crust 52 constellation Virgo 52 granite outcroppings 52 Athabasca Valles 52 Saturn moon Iapetus 52 volcanic ridges 52 moonlets 52 gravity warps 52 sandstone bluffs 52 Comet 9P/Tempel 1 52 5m #ft 52 Jurassic limestone 52 granite spiers 52 bulbous shapes 52 sunward 52 1m 3ft 52 Hellas Planitia 52 volcanic cone 52 stippled 52 cluster NGC 52 Saturnian system 52 mantle convection 52 galaxy M# [002] 52 Martian polar 52 hematite chlorite 52 roofscape 52 Upsilon Andromedae 52 hydrothermal fluid 52 constellation Coma Berenices 52 metamorphic rock 52 Mount Bosavi 52 gimble 52 polygon shaped 52 Navajo sandstone 52 basaltic rock 52 filamentary structures 52 basalt boulders 52 atomic lattice 52 interferogram 52 Flaking 52 sandstone spiers 52 galactic equator 52 Pinwheel galaxy 52 yellowish hue 52 asthenosphere 52 Comet Tempel Tuttle 52 electromagnetic flux 52 hydrocarbon haze 52 granite domes 52 periodic dimming 52 mylonite 52 ancient lakebed 52 waviness 52 atmospheric haze 52 zodiac constellations 52 subaqueous 52 shear veins 52 Banerdt 52 basalt columns 52 haloing 52 lapis blue 52 terraced hillsides 52 greenish hue 52 Sand dunes 52 convex lens 52 crossbedding 52 Yellowstone Caldera 51 mantled 51 rockfill 51 columnar basalt 51 windswept dunes 51 filamentary structure 51 karst limestone 51 rubbly 51 lithospheric 51 perspectival 51 barred spiral galaxy 51 icy moon Enceladus 51 Chicxulub crater 51 moai statues 51 Comet Halley 51 glaciers calving 51 volcanic craters 51 supergiant star 51 olivine crystals 51 orangey yellow 51 circumstellar disks 51 evaporite 51 Asteroid Belt 51 sandstone buttes 51 lowermost mantle 51 Arches Cluster 51 esker 51 landforms 51 icefields 51 icy moons 51 submillimeter 51 groundwater seepage 51 volcanic lava 51 Endurance crater 51 silicate mineral 51 bedrock outcrops 51 Bolinas Ridge 51 abyssal plains 51 Rosette Nebula 51 porous sandstone 51 golden orb 51 eolian 51 moon Dione 51 corrugation 51 Gakkel Ridge 51 noctilucent cloud 51 SNR #-#.# 51 Vastitas Borealis 51 trapezium 51 smoggy atmosphere 51 moonlet 51 granitic rock 51 isostatic rebound 51 P/# A2 51 diffuse aurora 51 crystalline silicates 51 rotational axis 51 CMB radiation 51 cloudscapes 51 Namib Desert 51 Chicxulub Crater 51 Tunguska Siberia 51 comet Tempel Tuttle 51 Cat Paw Nebula 51 Kamoamoa eruption 51 HD#b 51 colliding tectonic plates 51 aeolian 51 tidal tails 51 icescape 51 subsurface ocean 51 westerly dipping 51 gypsum crystals 51 lava flowing 51 comets asteroids 51 Mars Meridiani Planum 51 arcsecond 51 articular surfaces 51 karst topography 51 concentric ripples 51 Diviner instrument 51 phyllosilicate 51 sedimentary deposits 51 cobblestone pathways 51 obscuration 51 abyssal 51 hummock 51 planets Uranus 51 constellation Serpens 51 lance shaped 51 Widely spaced 51 landform 51 promontories 51 outwash 51 bluish greenish 51 Mare Imbrium 51 cuboid 51 stone cairns 51 rusticles 51 carbonaceous mudstone 51 quartz chalcopyrite 51 brittle deformation 51 sastrugi 51 concretion 51 stellar occultation 51 alpine terrain 51 grassy meadows 51 winglike 50 Omega Centauri 50 Martian landscape 50 mossy forest 50 cenospheres 50 mottled gray 50 planetary nebulas 50 elastic deformation 50 gyres 50 ionized hydrogen 50 faint smudge 50 limestone cliff 50 perfectly spherical 50 mountainscape 50 gibbous moon 50 Serpens Cauda 50 Omega Nebula 50 coquina rock 50 overlying layers 50 moonlike 50 Oort Cloud 50 auroral activity 50 crustal thickness 50 constellation Hercules 50 Jovian moon 50 epidote alteration 50 geoglyphs 50 brownish color 50 moons Phobos 50 Cerro Pachon 50 NEAs 50 limestone karst 50 Zeta Ophiuchi 50 fringing reef 50 polygonal shapes 50 basalt volcanic 50 unconsolidated sediments 50 Terra Meridiani 50 Morro Rock 50 Kermadec Arc 50 silvery scales 50 seracs 50 Ring Nebula 50 hydroxyl molecules 50 glacial moraine 50 comet nuclei 50 Saturn Enceladus 50 ferric oxides 50 silicate dust 50 inky shadows 50 Hadley Rille 50 heliospheric 50 ocean basins 50 emission nebula 50 subalpine meadows 50 earthlike 50 Encke gap 50 grabens 50 cometary impacts 50 tubercles 50 brise soleil 50 Jupiter magnetosphere 50 rock ledges 50 Venusian atmosphere 50 striations 50 limestone formations 50 loess soil 50 Galilean satellites 50 dodecahedron 50 ribbonlike 50 Nasca Lines 50 alluvial plains 50 glacial moraines 50 constellation Eridanus 50 shallow depressions 50 aperture telescope 50 karstic 50 Epsilon Aurigae 50 comet McNaught 50 Mini TES 50 icefalls 50 cumulonimbus cloud 50 Martian crater 50 albedo reflectivity 50 delicate tracery 50 equatorial latitudes 50 elongated orbits 50 Helix Nebula 50 olivine mineral 50 moon Phobos 50 mossy green 50 sandstone monoliths 50 galactic cores 50 cylindrical shaped 50 ashen gray 50 #cm diameter 50 granite cliffs 50 Dust devils 50 glacial outwash 50 milky quartz 50 uncompacted 50 calderas 50 Halemaumau 50 protoplanetary disc 50 phreatic 50 mineral olivine 50 earths surface 50 Delta Cephei 50 Cosmic Microwave Background 50 Gamburtsev Mountains 50 rusted rebar 50 layered bedrock 50 hollow cylindrical 50 icebergs calving 50 volcanic outcrops 50 Neutron stars 50 crenellations 50 #ft #m [001] 50 lush tropical rainforest 50 thick impasto 50 lichen covered 50 pyroclastic 50 sandstone pillars 50 Cape Foulweather 50 radiating outward 50 arrowhead shaped 50 mineral hematite 50 accretion disks 50 ferruginous 50 galactic disk 50 crosshatching 50 icecap 50 meteor craters 50 polar icecap 50 GJ #b [002] 50 purplish brown 50 equilateral triangle 50 Coma cluster 50 Peony nebula star 50 fault scarp 50 resculpted 50 retroreflector 50 retrograde orbit 50 geysers erupting 50 volcanic basalt 50 fissure eruption 50 elongated necks 50 tufa 50 leaf undersides 50 sunlight glinting 50 hardened lava 50 volcanic moon Io 50 constellation Cygnus 50 granite outcrops 50 iridescent sheen 49 lateritic 49 ellipsoid 49 Trifid 49 biomorphic shapes 49 hydrothermal alteration zones 49 glacial valleys 49 glasslike 49 tholins 49 gulleys 49 moonquakes 49 ignimbrite 49 G#.# +#.# 49 slickrock 49 tensile stresses 49 hidden crevasses 49 synclinal 49 craters 49 Virgo Cluster 49 deep gorges 49 filamentary 49 granite bedrock 49 crater 49 pyramidal shape 49 Chi Cygni 49 Longmen Shan fault 49 bubbling lava 49 comets orbiting 49 overhanging cliffs 49 nanometers billionth 49 Kasei Valles 49 endless expanse 49 #.#m #.#ft [002] 49 Fra Mauro 49 Pancam 49 RY Sagittarii 49 greenish glow 49 Earth ionosphere 49 burls 49 constellation Scorpius 49 constellation Auriga 49 galaxy NGC 49 tawny brown 49 Kilauea caldera 49 UB# Xena 49 gently undulating 49 whorled 49 lava flowed 49 smallest exoplanet 49 rotting timbers 49 COROT 7b 49 thermally induced 49 spheroidal 49 anticlines 49 bark peels 49 Great Conveyor Belt 49 speleothems 49 jagged limestone 49 micron millionth 49 glass prisms 49 meter diametre 49 gracefully curving 49 Woodhenge 49 interstellar cloud 49 umbels 49 leaflike 49 finely layered 49 geothermal gradient 49 eclipsing binary 49 fanlike 49 fossilized bone 49 Lake Cheko 49 eroding shorelines 49 metamaterial structures 49 Coma Cluster 49 waterfall cascades 49 escarpments 49 ghostly glow 49 Oort cloud 49 Palaeozoic sedimentary 49 Balarat Project 49 arcuate 49 densely forested mountain 49 protoplanet 49 glacial erratics 49 Corona Borealis 49 hexagonal pattern 49 planet Gliese #c 49 gibbous 49 proplyds 49 ostracods 49 evanescent waves 49 infall 49 shiplap 49 pyrite galena 49 Fornax cluster 49 cometary material 49 interstellar dust clouds 49 spathe 49 placer workings 49 freshwater snail 49 Saturn outermost ring 49 elliptical shaped 49 Mars moon Phobos 49 igneous rock 49 Methone 49 reddish orange hue 49 called lobate scarps 49 fairy chimneys 49 micrometer scale 49 haze shrouding 49 honeycomb structure 49 Hairline cracks 49 thunderhead 49 convex concave 49 waterfalls caves 49 barren expanse 49 felsic metavolcanic 49 chalcedonic quartz 49 concavity 49 gnomon 49 Saturn rings 49 prominences 49 sandstone outcroppings 49 Cassini flyby 49 ridges 49 cosmological distances 49 shadowed craters 49 Geminga 49 nebulas 49 majestic peaks 49 telescopically 49 spindle shaped 49 delaminations 49 Orion constellation 49 tetrahedron 49 spherical shell 49 Halema'uma'u 49 light refracting 49 crenelated 49 quartz grains 49 nacreous 49 tidal basin 49 outer corona 49 fingerlike projections 49 mineralogical composition 49 Tunguska meteorite 49 glacier carved 49 Fermi telescope 49 scarps 49 Sombrero Galaxy 49 glacial boulders 49 extrusive 49 extrasolar 49 galactic clusters 49 parabolic reflectors 49 Mars Squyres 49 glacier calving 49 stratocumulus clouds 49 swirling dust devils 49 pterosaur fossils 49 inky sky 49 scutes 49 wavefronts 49 trapezoid shape 49 starquakes 49 orangey brown 49 constellation Andromeda 49 silicified rocks 49 fritted glass 49 rockwork 49 NGC #A 49 Tempel Tuttle 49 stratovolcano 49 silty mud 49 tumulus 49 radula 49 knolls 49 coronal loop 49 densest cluster 49 pinkish gray 49 surface hoar 49 domelike 49 dolmen 49 Sojourner rover 49 Angelpond 48 suspender cables 48 spume 48 active volcanism 48 bilaterally symmetrical 48 outermost layers 48 sengi 48 convex lenses 48 rusted hulks 48 rocky ridges 48 Jovian atmosphere 48 gridwork 48 greenish brown 48 diameter payload fairing 48 Toutatis 48 moons orbiting 48 alluvial plain 48 gravitational tides 48 lunar crescent 48 limestone outcroppings 48 cloudscape 48 anorthosite 48 octahedron 48 tidally 48 subducting plate 48 Endurance Crater 48 ductile deformation 48 shifting tectonic plates 48 ellipse 48 perma frost 48 amphibolite 48 wooded ridges 48 oblate spheroid 48 Ruwenzori Mountains 48 comet tail 48 polyhedron 48 Hunga Tonga 48 constellation Aquarius 48 rocky crags 48 Ulysses spacecraft 48 pyroclastic material 48 sun glints 48 Namib desert 48 constellation Pisces 48 felsic tuff 48 HL Tau 48 spacecraft flyby 48 Jurassic sandstone 48 granitoids 48 WNW trending 48 spatterdock 48 paleochannel 48 blue supergiant 48 sandstone formations 48 terminal moraine 48 canali 48 lotus petals 48 topological defects 48 globular cluster M# 48 moon Iapetus 48 Pleiades cluster 48 inner asteroid belt 48 disseminated sulfide 48 meteoroid 48 tectonic uplift 48 Lake Keechelus 48 Field Imager 48 diffraction grating 48 earthshine 48 meteorite craters 48 lichen encrusted 48 constellation Ophiuchus 48 sunlike 48 upland meadows 48 micro meteorites 48 Caloris basin 48 Mont Blanc Massif 48 Orientale Basin 48 birdlike dinosaur 48 Vast expanses 48 alluvial gravel 48 malachite mineralization 48 Bug Nebula 48 shadowy craters 48 Aram Chaos 48 smoggy haze 48 powdery sand 48 Scanning electron microscope 48 silhouetting 48 ancient petroglyphs 48 Martian gullies 48 plateaux 48 giant elliptical galaxy 48 nebular 48 star Beta Pictoris 48 spherical halo 48 concave surfaces 48 starlike 48 turbidites 48 erupting lava 48 arctic plains 48 intraplate 48 rafted debris 48 Devil Throat 48 hexagonal mirrors 48 stockwork breccia 48 calcite crystals 48 reddish hue 48 galaxy M# [001] 48 Ligurian Sea 48 coppery brown 48 ah dus 48 Pu ` 48 forested hillside 48 moisture seeps 48 Mount Palomar Observatory 48 large oceanic plateaus 48 Bayon temple 48 fernlike 48 Concentric circles 48 tropopause 48 ringplane 48 Eta Aquarid meteor shower 48 clayey 48 granite gneiss 48 treeless terrain 48 Navajo Sandstone 48 rusted iron 48 Nubian Desert 48 karst formations 48 teardrop shape 48 fountaining 48 ejecta 48 moulins 48 talus slopes 48 Jovian moons 48 Cometary 48 double helix nebula 48 galactic halo 48 permanently shadowed regions 48 Saturnian moon Titan 48 Saturn Uranus 48 rugged cliffs 48 cosmic cannibal 48 trabeculae 48 icy crust 48 Scorch marks 48 planet Gliese #g 48 radar interferometry 48 Late Paleozoic 48 rover panoramic 48 foreground galaxy 48 luxuriant vegetation 48 hollow cylinders 48 dimpling 48 tephra dam 48 greenish yellow flowers 48 lakebed sediments 48 Galileo spacecraft 48 unshelled peanut 48 Samuel Oschin Telescope 48 millimetric 48 featherlike 48 terraformed 48 molten magma 48 Plate tectonics 48 scalloped edges 48 mantling 48 X ray wavelengths 48 Peat bog 48 arcminutes 48 ship prow 48 EW trending 48 redwood beams 48 opalescence 48 tubercle 48 diagrid 48 6m #ft 48 oblongs 48 grassy mounds 48 Teton Range 48 Halema'uma'u Crater 48 unbroken expanse 48 wildflower blooms 48 Qinghai Tibet plateau 48 quartz pyrite veins 48 yeti crab 48 inverted U 48 coarse pyrite 48 Corot 9b 48 Neogene 48 gaping craters 48 ashlar 48 atmospheric circulations 48 quartz sericite alteration 48 rock outcrops 48 gossan zones 48 chevron shaped 48 disseminated pyrrhotite 48 astrophysical objects 48 comet nucleus 48 yellowish glow 48 heliopause 48 brownish hue 48 Rano Raraku 48 horseshoe shaped crater 48 wooded terrain 48 coronal mass ejections CMEs 48 outcrop exposures 48 calving glaciers 48 constellation Ursa Major 48 flat featureless 48 translucent acrylic 48 basalt flows 48 thrust faulting 48 nanoribbon 48 meteoritic material 48 celestial sphere 48 dust motes 48 crackle breccia 48 iridium layer 48 cosmic magnifying glass 48 coastal headlands 48 cove molding 48 tubelike 48 Hot Jupiters 48 Nares Strait 48 stone archways 48 shallowly buried 48 glacier melts 48 Chasma Boreale 48 shifting sand dunes 48 reddish glow 48 rectangular slabs 48 interstellar boundary 48 bony ridges 48 lunar soil 48 reddish orange color 48 photosphere 48 mangrove shoreline 48 spookfish 48 tundra vegetation 48 planetesimal 48 collisional 48 geomorphic 48 anastomosing 47 ultramafic intrusives 47 mangrove roots 47 infrared laser beam 47 Cydonia region 47 striated 47 volcanic vents 47 dust enshrouded 47 hyperbolic geometry 47 lush subtropical 47 protoplanets 47 oceanic trenches 47 arsenopyrite pyrite 47 conodonts 47 siliceous sediments 47 volcanic crater 47 limestone bedrock 47 crackle glaze 47 polynya 47 Mardasson Memorial 47 uniformly spaced 47 silicified zone 47 star Spica 47 penumbral shadow 47 Saturn Cassini 47 distant suns 47 pinkish glow 47 #.#m 8ft 47 honeycomb pattern 47 Limmat River 47 chequerboard 47 limestone slabs 47 thundering waterfall 47 spherical objects 47 bedrock outcropping 47 gorgonians 47 stony meteorites 47 wrinkle ridges 47 #cm 2ft 47 bullrushes 47 coquina stone 47 Andromeda galaxy 47 microns millionths 47 Sagittarius dwarf galaxy 47 cosmic microwave radiation 47 compressional 47 interstellar distances 47 flowerheads 47 lightwaves 47 amoeba shaped 47 cloverleaf shaped 47 duckbill dinosaur 47 steep dropoffs 47 ionized particles 47 diametre 47 tectonic faults