Related by context. Frequent words. (Click for all words.) 64 GRB # 64 magnetars 63 Gamma ray bursts 61 magnetar 60 planetary nebulae 60 supernova remnants 59 X ray emission 59 supernova explosion 59 active galactic nuclei 59 supernova remnant 59 HD #b [002] 58 planetary nebula 58 supernova 58 WASP #b 58 Gliese #g 58 globular cluster 57 Galaxy Evolution 57 gamma ray burst 57 planet orbiting 57 dwarf galaxy 57 meteoroid 56 supernovae 56 distant galaxy 56 supernovas 56 Crab Nebula 56 Large Magellanic Cloud 56 Eta Carinae 55 Cancri 55 spiral galaxies 55 star Gliese 55 Orion Nebula 55 brown dwarfs 55 globular clusters 55 Gamma rays 55 Andromeda Galaxy 55 coronal mass ejection 55 comet nucleus 55 quasar 54 radial velocity 54 colliding galaxies 54 brown dwarf 54 galaxy cluster 54 GRBs 54 Type Ia supernovae 53 hot Jupiters 53 supernova explosions 53 elliptical galaxies 53 accretion disk 53 gamma rays 53 planet orbits 53 supermassive black hole 52 ejecta 52 Andromeda galaxy 52 gamma ray bursts 52 quasars 52 neutron star 52 dwarf galaxies 52 meteoroids 52 solar nebula 52 galaxy 52 neutron stars 52 pulsar 52 galaxy formation 52 Fomalhaut 52 ionized gas 52 subatomic particle 51 Kuiper belt 51 spiral galaxy 51 GRB 51 XMM Newton 51 solar flares 51 constellation Leo 51 neutrino 51 moon Charon 51 galaxies 51 Milky Way Galaxy 51 nebula 51 cosmic ray 51 comet 51 coronal mass ejections 51 redshift 50 solar corona 50 extrasolar planet 50 aurorae 50 Earth magnetosphere 50 celestial object 50 interplanetary spacecraft 50 nebulae 50 Oort Cloud 50 polar vortex 50 auroral 50 positrons 50 microlensing 50 Saturn moons 50 planets orbiting 50 super Earths 49 galaxy clusters 49 cosmic microwave background 49 positron 49 accreting 49 rocky planets