Related by context. Frequent words. (Click for all words.) 49 rover Opportunity 48 Mars Lander 47 NASA Mars rover 47 Martian arctic 47 Opportunity rover 45 Devin Coldewey 45 Mars orbiter 45 interplanetary spacecraft 45 Martian 44 PASADENA Calif. NASA 44 Lake Vostok 44 ESA Mars 44 Martian equator 43 orbiting spacecraft 43 Brrrr 43 Saturn moon 43 Mars lander 43 stormy weather 43 moon Europa 42 martian soil 42 subfreezing 42 warmer temps 42 rovers Spirit 42 NASA Cassini 42 Unusually warm 42 Phoenix lander 42 Red Planet 42 Phoenix Mars Lander 42 frigid 42 Snowball Earth 42 rover Spirit 42 cold 42 Mars rover Opportunity 42 Titan Saturn 42 sols 41 Hayabusa probe 41 freezing temperatures 41 -# degrees Fahrenheit [002] 41 Cabeus crater 41 Martian surface 41 orbiting Mars 41 subzero temperatures 41 arctic 40 coldest temperatures 40 Martian soil 40 lander 40 Phoenix Mars lander 40 twin rovers 40 searing temperatures 40 innermost planet 40 bitterly cold 40 Saturn moons 40 NASA Cassini spacecraft 40 Mars rover Spirit 40 interglacial period 40 Saturn moon Enceladus 40 polar vortex 39 bone chilling 39 Global Surveyor 39 arctic blast 39 Itokawa 39 rovers 39 frigid weather 39 Warm temperatures 39 Mild temperatures 39 Frigid temperatures 39 Sweltering 39 outer planets 39 Bone chilling 39 equatorial Pacific Ocean 39 Meridiani 39 temperatures 39 weather 39 measurable snowfall 39 subzero 39 orbiting Saturn 39 windchills 39 martian 39 scorchers 39 chilly temperatures 39 Northerly winds 39 Gliese #g 39 solar nebula 38 -# ° C. [001] 38 sub freezing temperatures 38 Today Mostly sunny 38 freezing temps 38 martian surface 38 spacecraft 38 La Nina pattern 38 Martian landscape 38 VSS Enterprise 38 balmy temperatures 38 NSIDC 38 icecaps 38 Spirit rover 38 NASA Mars Odyssey 38 Sensing Satellite LCROSS 38 subzero weather 38 Partly sunny skies 38 Warming temperatures