Related by context. Frequent words. (Click for all words.) 65 Gamma ray bursts 65 astronomical objects 63 GRBs 63 X ray emission 63 distant galaxy 62 redshift 62 astrophysical 62 interferometry 61 supernovae 61 HD #b [002] 61 infrared wavelengths 61 gravitational lensing 60 XMM Newton 60 visible wavelengths 60 supernova remnant 60 photometric 60 distant galaxies 60 planet orbits 60 occultation 60 celestial objects 60 elliptical galaxies 60 Crab Nebula 60 extrasolar planets 60 spectroscopic 60 interstellar dust 60 Milky Way Galaxy 60 nebulae 60 supernovas 59 accretion disk 59 astronomers 59 gravitational waves 59 celestial object 59 microlensing 59 Eta Carinae 59 globular clusters 59 gravitational wave 59 quasars 59 brown dwarfs 59 extrasolar planet 59 habitable planets 58 comet nucleus 58 Orion Nebula 58 unaided eye 58 galaxy 58 auroral 58 Andromeda galaxy 58 starbursts 58 Andromeda Galaxy 58 Earth magnetosphere 58 Jupiter Saturn 58 quasar 57 planets 57 ejecta 57 globular cluster 57 magnetosphere 57 cosmic ray 57 radiometer 57 cosmic microwave background 57 galaxy clusters 57 ionized gas 57 supernova 57 starlight 57 astronomical observations 57 nebula 57 observable universe 57 galaxies 57 WIMPs 57 VLBA 57 galaxy formation 57 supernova explosions 56 ESO Very Large Telescope 56 interplanetary spacecraft 56 cosmological 56 planets orbiting 56 celestial bodies 56 astrophysicists 56 Kuiper belt 56 abundances 56 ionospheric 56 magnetar 56 neutrino 56 galaxy cluster 56 supernova explosion 56 spiral galaxies 56 dynamical 55 cosmic rays 55 planet orbiting 55 dwarf galaxy 55 gamma rays 55 exoplanet 55 wavelengths 55 brown dwarf 55 optical telescopes 55 spacetime 55 meteoroid 55 Betelgeuse 55 interstellar medium 55 comet 55 Spitzer Space Telescope 55 infrared radiation 55 Milky Way galaxy