Related by context. Frequent words. (Click for all words.) 64 mid latitudes 61 temperate zones 60 tropics 60 temperate regions 60 equator 59 latitudes 56 polar regions 56 geologically active 56 equatorial 56 super Earths 56 northern latitudes 55 terrestrial planets 55 rocky planets 55 subtropics 54 moon Europa 53 HD #b [002] 53 polar caps 53 troposphere 52 Enceladus 52 Saturn rings 51 Saturn moon 51 Sedna 50 water vapor 50 X ray emission 50 extrasolar planets 50 Saturn moons 50 Martian surface 50 Northern Hemisphere 50 atmospheric circulation 50 Iapetus 49 Geminids 49 volcanism 49 extrasolar planet 49 outer planets 49 Antarctica 49 NASA Cassini spacecraft 49 planets orbiting 49 infrared wavelengths 49 landmasses 49 greenhouse warming 48 silicates 48 exoplanets 48 comets 48 tropical climates 48 interstellar dust 48 ecliptic 48 dwarf galaxies 48 Medieval Warm Period 48 hot Jupiters 48 globular clusters 48 albedo 48 Jupiter Saturn Uranus 48 volcanic activity 48 brown dwarfs 47 Kuiper Belt 47 planets 47 northern hemisphere 47 orbiting spacecraft 47 glacial melt 47 infrared radiation 47 Little Ice Age 47 elliptical galaxies 47 cosmic rays 47 polar 47 interstellar medium 47 ejecta 47 Mars 47 Sunspots 47 permafrost 46 glaciers 46 cometary 46 GRBs 46 Tibetan Plateau 46 mountain glaciers 46 equatorial Pacific 46 Antartica 46 Antarctic peninsula 46 lunar surface 46 planet orbiting 46 Geophysical Research 46 Antarctic Peninsula 46 Martian atmosphere 46 Meridiani Planum 46 sunspot activity 46 abundances 46 glaciation 46 El Ninos 46 galaxy cluster 46 southern hemisphere 45 Milky Way Galaxy 45 Red Planet 45 lake sediments 45 distant galaxies 45 habitable zone 45 warmer temperatures 45 Martian soil 45 temperate climates 45 Antarctic 45 ocean currents 45 ringed planet 45 Milky Way galaxy