Related by context. Frequent words. (Click for all words.) 67 mid latitudes 67 convective 66 X ray emission 65 Earth magnetosphere 64 lithosphere 63 atmospheric circulation 63 auroral 63 magnetosphere 62 troposphere 61 aerosol particles 61 geomagnetic field 61 Saturn moon Enceladus 59 volcanism 59 water vapor 59 ionosphere 59 sunspot activity 59 crustal 59 anticyclone 59 ejecta 58 equatorial 58 supernova explosion 58 galaxy cluster 58 equatorial Pacific 58 polar caps 58 sunspot 58 NASA Cassini spacecraft 58 Saturn rings 58 meteoroid 58 polar regions 58 cirrus clouds 58 geomagnetic 58 temperature gradient 57 hydrological cycle 57 convection 57 polar 57 Iapetus 57 oscillations 57 jet stream 57 heliosphere 56 superfluid 56 aurora 56 HD #b [002] 56 dust devils 56 vortices 56 oscillation 56 supernova remnant 56 Enceladus 56 comet nucleus 56 interstellar medium 56 neutron star 56 MODIS 55 vertical wind shear 55 latitudes 55 North Atlantic Oscillation 55 auroras 55 icecap 55 Weddell Sea 55 cosmic ray 55 cosmic microwave background 55 equator 55 Eta Carinae 55 substorms 55 meteoroids 55 landmasses 55 nebula 55 supernova explosions 55 XMM Newton 55 glaciation 55 geomagnetic storms 55 coronal mass ejection 55 NASA Aqua 55 equatorial regions 55 Sunspots 54 geomagnetic storm 54 stratospheric ozone 54 greenhouse warming 54 galaxy clusters 54 Wilkins Ice Shelf 54 volcanic plume 54 quasar 54 volcanic activity 54 magnetic fields 54 magnetar 54 Opportunity rover 54 sunspots 54 ringed planet 54 orbiting spacecraft 54 Martian surface 54 atmospheric 54 interstellar dust 53 moon Titan 53 geologically active 53 albedo 53 upwelling 53 Martian atmosphere 53 supermassive black hole 53 silicates 53 occultation 53 martian 53 solar flares 53 Milky Way Galaxy