Related by context. Frequent words. (Click for all words.) 60 X ray emission 57 cosmic rays 56 gamma rays 55 magnetar 54 cosmic ray 53 electron volts 53 astrophysical 53 auroral 53 supernova remnant 52 coronal mass ejection 52 elliptical galaxies 52 Eta Carinae 52 redshift 51 supernova explosions 51 ejecta 51 quasar 50 neutron star 50 perigee 50 gamma ray burst 50 gamma ray bursts 50 supernova explosion 50 infrared wavelengths 50 excitation 50 radiative 50 angular momentum 50 interstellar medium 50 supernova 50 positrons 49 velocities 49 magnetization 49 comet nucleus 49 neutrons 49 XMM Newton 49 muons 49 gamma ray 49 coronal mass ejections 49 anisotropy 49 sunspot activity 49 electron spin 48 gravitational wave 48 photons 48 GRBs 48 Earth magnetosphere 48 relativistic 48 brown dwarfs 48 subatomic particles 48 galaxy cluster 48 deuterium 48 supermassive black hole 47 geomagnetic field 47 quark gluon plasma 47 neutrinos 47 spectroscopic 47 sunspot 47 cosmological constant 47 protons 47 convective 47 quasars 47 conductance 47 crustal 47 femtoseconds 47 supernovae 47 radioactive decay 47 gravitational lensing 46 atomic nuclei 46 superfluid 46 magnetic fields 46 quantum mechanical 46 ionosphere 46 neutrino 46 ion beam 46 solar flares 46 amplitudes 46 dwarf galaxy 46 photon 46 dwarf galaxies 46 interferometry 46 magnetosphere 46 luminosity 46 interstellar dust 46 spiral galaxies 46 geomagnetic storm 46 supernovas 46 globular cluster 46 fermions 46 dynamical 45 neutron stars 45 ecliptic 45 aerosol particles 45 heliosphere 45 gravitational waves 45 geomagnetic 45 diffraction 45 elliptical orbit 45 substorms 45 galaxy clusters 45 spectra 45 CMEs 45 electrons 45 HD #b [002] 45 gravitational