Related by context. Frequent words. (Click for all words.) 64 solar corona 63 polar vortex 63 X ray emission 62 Cosmic rays 59 magnetic reconnection 59 atmospheric turbulence 59 Gamma ray bursts 59 sunspots 59 Gamma rays 58 geomagnetic storms 58 geomagnetic field 57 solar flares 57 meteoroids 57 Earth magnetosphere 57 Sunspots 57 active galactic nuclei 57 convective 56 aurorae 56 auroral 56 coronal mass ejections 56 innermost planet 55 substorms 55 Oort Cloud 55 interplanetary spacecraft 55 dust devils 55 sunspot cycle 55 magnetosphere 55 sunspot activity 54 geomagnetic 54 optical wavelengths 54 ionized gas 54 magnetic fields 54 moonlets 54 CMEs 54 #/#Z 54 sunspot 54 solar nebula 54 geomagnetic storm 54 coronal mass ejection 54 inversion layer 54 irradiance 53 WASP #b 53 magnetic flux 53 pulsations 53 cosmic ray 53 cosmic radiation 53 interstellar dust 53 solar irradiance 53 aurora 53 visible wavelengths 53 ionospheric 53 thermosphere 53 gamma rays 52 cumulus clouds 52 comet tail 52 auroras 52 XMM Newton 52 meteoroid 52 oscillations 52 radial velocity 52 cosmic rays 52 ultraviolet UV radiation 52 ITCZ 52 cirrus 52 shorter wavelengths 52 magnetar 52 nebulae 52 El Niños 52 supernova explosions 52 microwave radiation 52 planetesimals 52 cirrus clouds 52 orbiting planets 52 Martian equator 52 aerosol particles 51 radiative 51 spectrographs 51 Saturn moon Enceladus 51 terahertz radiation 51 interstellar medium 51 explosive eruptions 51 accretion disk 51 astronomical objects 51 volcanic activity 51 electron density 51 ecliptic 51 Activity Forecast 51 photometer 51 corona 51 gamma ray burst 51 -# ° C [001] 51 perturbations 51 planetary nebulae 51 Saturn rings 50 Crab Nebula 50 temperature gradient 50 WFPC2 50 GRBs 50 Ultraviolet light 50 unaided eye 50 supernova explosion