Related by context. Frequent words. (Click for all words.) 74 cosmic rays 72 magnetosphere 70 cosmic radiation 68 X ray emission 67 Earth magnetosphere 67 cosmic ray 65 gamma rays 65 ionosphere 64 solar flares 63 heliosphere 63 magnetic fields 63 interstellar medium 63 aerosol particles 63 substorms 62 supernova explosions 62 coronal mass ejections 62 radiative 61 astrophysical 61 gravitational waves 61 gravitational lensing 61 geomagnetic storms 61 ejecta 60 GRBs 60 UV radiation 59 magnetar 59 supernova explosion 59 CMEs 59 water vapor 58 comets 58 stratospheric ozone 58 infrared radiation 58 interstellar dust 58 XMM Newton 58 muons 58 gravitational wave 58 galaxy clusters 57 neutrons 57 terrestrial planets 57 gamma ray burst 57 outer planets 57 neutrino 57 quark gluon plasma 57 radioactive decay 57 quasars 57 neutrinos 57 Eta Carinae 57 cometary 56 geomagnetic field 56 HD #b [002] 56 photons 56 COROT 56 fermions 56 supernovae 56 coronal mass ejection 56 quasar 56 ultraviolet radiation 56 auroras 56 troposphere 56 convective 56 brown dwarfs 56 sunspot activity 56 phonons 56 comet 56 electromagnetic radiation 56 dynamical 56 particles 56 perturbations 56 comet nucleus 56 atomic nuclei 55 spacetime 55 ultraviolet light 55 positrons 55 neutron star 55 ionizing 55 cosmic microwave background 55 Sunspots 55 Saturn rings 55 hydroxyl 55 gamma ray bursts 55 albedo 55 hot Jupiters 55 gravitationally 55 laser pulses 55 distant galaxies 55 astronomical objects 55 high temperature superconductivity 55 rocky planets 55 laser pulse 55 vertical wind shear 55 Martian atmosphere 54 electromagnetic waves 54 dwarf galaxies 54 supermassive black hole 54 elliptical galaxies 54 sunspots 54 superfluid 54 atmospheric circulation 54 Solar System 54 silicates 54 occultation 54 anisotropy