Related by context. Frequent words. (Click for all words.) 54 craggy mountains 53 boulder strewn 52 Gusev crater 51 moonscapes 51 bomb craters 50 Martian landscape 50 hardened lava 50 dusty 50 craters 50 mist shrouded 49 sandy terrain 49 desolate 49 polar craters 49 MGS Mars Orbiter Camera 49 Martian dust 48 pebbly 48 leafless trees 48 rocky slope 48 dun colored 48 granite cliffs 48 freshly plowed 48 moonscape 48 corkscrewing 48 powdery sand 48 dust devils 47 faintly visible 47 rugged cliffs 47 cobblestoned streets 47 lunar craters 46 Hurtling 46 Opportunity rover 46 deeply rutted 46 deep gorges 46 Martian equator 46 jagged peaks 46 erupting volcanoes 46 barren hills 46 HiRISE camera 46 whooshes 46 Jupiter moons 45 chalky white 45 NASA Opportunity rover 45 crater 45 jagged mountains 45 NASA Spirit rover 45 martian surface 45 grassy plains 45 lunar crater 45 dense brush 45 unforgiving terrain 45 heavily cratered 45 barren landscape 45 corrugations 45 Rover Opportunity 45 dustiest 45 lush jungle 44 desolate landscape 44 Thick clouds 44 Valles Marineris 44 martian soil 44 Glass shards 44 barren desert 44 windblown dust 44 lunar soil 44 sun glinting 44 steep ravines 44 dry riverbeds 44 cobble stones 44 rover Spirit 44 Helicopters hovered 44 Helicopters buzzed overhead 44 rock outcrop 44 deep ravines 44 grassy slopes 44 martian 44 scrublands 44 moonless 44 rocky terrain 44 escarpments 44 rock outcropping 43 mountainside 43 lava tubes 43 winding alleys 43 salt flats 43 exosphere 43 towering cliffs 43 Chugach Mountains 43 jagged 43 knolls 43 arid plains 43 meteoroids 43 rocky outcroppings 43 gaping crater 43 blinding sandstorm 43 NASA Mars Reconnaissance 43 Swooping 43 microscopic imager 43 misty mountains 43 sunbeams 43 craggy peaks 43 arid desert