Related by context. Frequent words. (Click for all words.) 68 gamma ray bursts 68 GRBs 66 gamma ray burst 61 X ray emission 59 supernova explosion 58 supernova explosions 58 solar flares 58 CMEs 57 supernovas 57 supernovae 57 substorms 57 coronal mass ejections 57 magnetar 57 pulsations 55 gamma rays 55 Eta Carinae 53 quasars 53 supernova 53 cosmic rays 53 astrophysical 53 gravitational waves 52 elliptical galaxies 51 coronal mass ejection 51 cosmic ray 51 geomagnetic storms 51 oscillations 51 phenomena 51 neutron stars 51 volcanic eruptions 51 accreting 51 quasar 50 laser pulses 50 dwarf galaxy 50 distant galaxies 50 galaxy clusters 50 occultation 50 neutron star 50 distant galaxy 50 supernova remnant 50 comets 50 galaxies 50 GRB 49 XMM Newton 49 nebulae 49 pulsars 49 Leonids 49 spiral galaxies 49 bursts 49 supermassive black hole 49 eruptions 49 quark gluon plasma 49 meteor showers 49 globular clusters 49 cosmic 49 auroras 49 gamma ray 49 ejecta 48 vortices 48 supermassive black holes 48 NASA Chandra 48 perturbations 48 positrons 48 laser pulse 48 gravitational lensing 48 Orion Nebula 47 Betelgeuse 47 HD #b [002] 47 Saturn moons 47 optical telescopes 47 cometary 47 comet 47 super Earths 47 Sunspots 47 magnetic fields 47 spacetime 47 meteor shower 47 Brownian motion 47 Geminids 47 hot Jupiters 47 Earth magnetosphere 47 dwarf galaxies 46 brown dwarfs 46 X ray Observatory 46 extrasolar planets 46 supermoon 46 neutrinos 46 aurora 46 volcanism 46 nova 46 galaxy 46 nebula 46 extrasolar planet 46 magnetosphere 46 gravitational wave 46 observable 46 neutrino 46 galaxy cluster 46 aerosol particles 46 astronomical objects 46 dynamical 46 aurora borealis