Related by context. Frequent words. (Click for all words.) 71 X ray emission 68 infrared wavelengths 67 astronomical objects 66 GRBs 65 distant galaxies 65 HD #b [002] 64 extrasolar planets 63 astrophysical 63 optical telescopes 63 wavelengths 63 supernova remnant 63 quasars 63 unaided eye 63 redshift 63 gravitational lensing 63 Milky Way Galaxy 63 interferometry 62 planets orbiting 62 magnetar 62 elliptical galaxies 62 quasar 62 nebulae 62 galaxy clusters 62 Orion Nebula 61 Eta Carinae 61 spiral galaxies 61 extrasolar planet 61 supernovae 61 distant galaxy 61 rocky planets 61 gamma ray burst 61 XMM Newton 61 cosmic microwave background 61 dwarf galaxies 60 infrared radiation 60 galaxies 60 gamma rays 60 spectroscopic 60 exoplanets 60 laser pulses 60 auroras 59 gamma ray bursts 59 magnetosphere 59 interstellar dust 59 galaxy cluster 59 ejecta 59 brown dwarfs 59 neutron stars 59 celestial objects 59 Andromeda Galaxy 59 spectra 59 gravitational waves 59 globular clusters 59 comet nucleus 59 Milky Way galaxy 58 planet orbiting 58 Earth magnetosphere 58 photometric 58 aurora 58 exoplanet 58 magnetic fields 58 diffraction 58 gravitational wave 58 supernova explosions 58 dwarf galaxy 57 occultation 57 supermassive black hole 57 supernovas 57 cosmic rays 57 photons 57 terrestrial planets 57 infrared 57 super Earths 57 neutrino 56 interferometer 56 cosmic ray 56 spiral galaxy 56 supernova explosion 56 planets 56 X ray Observatory 56 Saturn rings 56 pulsars 56 hot Jupiters 56 ionosphere 56 wavelength 56 anisotropy 56 gamma ray 56 luminosity 56 photonic crystals 56 Spitzer Space Telescope 56 astronomical observations 56 astronomers 56 brown dwarf 55 supernova 55 galaxy 55 ESO Very Large Telescope 55 neutron star 55 Very Large Telescope 55 muons 55 positrons 55 quark gluon plasma