Related by context. Frequent words. (Click for all words.) 72 Gamma ray bursts 64 Gamma rays 62 Supernovae 61 Solar flares 58 Crab Nebula 56 Meteor showers 55 TGFs 55 supernova remnants 55 helium atoms 55 X ray telescopes 54 interstellar clouds 53 Cosmic rays 53 aurorae 53 magnetars 53 GRBs 53 photosphere 52 magnetic reconnection 52 stellar nurseries 52 Cepheids 51 novae 51 substorm 51 starbursts 51 Type Ia supernovae 51 gamma ray bursts 51 gravitational lens 51 coronal mass ejections 51 planet Uranus 51 Neutrinos 51 Laser beams 50 Jupiter Saturn 50 Carina Nebula 50 ultraviolet wavelengths 50 interplanetary spacecraft 50 Eta Carinae 50 substorms 50 subatomic particle 50 microwave radiation 50 active galactic nuclei 50 planetary nebulae 50 galaxy NGC 50 stimulated emission 50 gamma rays 50 supernovae 50 distant galaxy 49 planetary nebula 49 excitations 49 explosions 49 magnetar 49 supernovas 49 supernova explosion 49 soliton 49 Photons 49 #/#Z 49 red supergiant 49 gamma ray burst 49 Antimatter 49 constellation Virgo 49 nebulae 49 antiparticles 49 soundwaves 49 gravitationally bound 49 Hawking radiation 49 colliding galaxies 49 protostars 49 Neutrons 49 elliptical galaxy 48 auroral 48 supernova explosions 48 WIMPS 48 proton collisions 48 supernova remnant 48 WIMPs 48 unseeable 48 protostar 48 ultracold 48 surface plasmons 48 plasmon 48 pulsations 48 constellation Gemini 48 Eagle Nebula 48 protoplanetary disk 47 orbiting planets 47 Galaxy Evolution 47 solar flares 47 Exoplanet 47 CMEs 47 moon Enceladus 47 Orion Nebula 47 icy moons 47 masers 47 solar corona 47 cosmic 47 Ultraviolet radiation 47 Sunspots 47 globular star 47 #.# MHz [002] 47 gravitational interactions 47 Saturnian 47 redshifts 47 optical wavelengths 47 radiations