Related by context. Frequent words. (Click for all words.) 69 cosmic rays 64 X ray emission 64 cosmic ray 64 gamma rays 64 magnetic fields 63 ionized gas 63 muons 62 excitons 62 Earth magnetosphere 61 magnetic flux 61 GeV 61 magnetosphere 61 electron beams 60 interstellar medium 60 coronal mass ejections 60 electrons 60 protons 60 neutrino 60 photons 60 ionosphere 59 neutrinos 59 atomic particles 59 laser pulses 59 subatomic particles 59 radiative 59 particle beam 58 gravitational waves 58 ejecta 58 solar flares 58 positrons 58 Neutrinos 58 WIMPs 58 muon 57 meteoroid 57 gamma ray burst 57 laser pulse 57 magnetar 57 meteoroids 57 particles 57 supernova explosions 57 aerosol particles 57 gravitational wave 57 coronal mass ejection 57 auroral 57 neutrons 56 comet nucleus 56 ions 56 nuclei 56 picosecond 56 atomic nuclei 56 phonons 56 accretion disk 55 CMEs 55 auroras 55 oscillations 55 GRBs 55 galaxy clusters 55 gravitationally 55 anisotropy 55 velocities 55 high temperature superconductivity 55 infrared radiation 54 quasar 54 atoms 54 electron 54 electromagnetic waves 54 XMM Newton 54 geomagnetic storms 54 substorms 54 neutron star 54 quasars 54 heliosphere 54 supernova explosion 54 magnetization 54 amplitudes 54 high temperature superconductors 54 gravitational lensing 53 gamma ray bursts 53 galaxy formation 53 quark gluon plasma 53 infrared wavelengths 53 Eta Carinae 53 Electrons 53 galaxy cluster 53 photon 53 pulsars 53 neutron stars 53 spacetime 53 superfluid 53 Itokawa 53 picoseconds 53 pulsar 53 pulsations 52 superconductor 52 geomagnetic field 52 supernovae 52 cometary 52 supermassive black hole 52 subatomic 52 vortices 52 cosmic radiation