Related by context. Frequent words. (Click for all words.) 71 astronomical objects 70 infrared wavelengths 67 distant galaxies 66 XMM Newton 64 X ray emission 63 optical telescopes 63 unaided eye 63 distant galaxy 62 wavelengths 62 planets orbiting 62 quasars 62 comet nucleus 62 GRBs 62 Milky Way Galaxy 62 elliptical galaxies 61 COROT 61 Andromeda Galaxy 61 extrasolar planets 60 nebulae 60 infrared radiation 60 shorter wavelength 60 planet orbiting 60 exoplanets 60 interferometry 60 gravitational lensing 60 spectroscopic 59 gamma ray bursts 59 celestial objects 59 interstellar dust 59 galaxy cluster 59 infrared 59 Orion Nebula 59 spatial resolution 59 redshift 59 galaxy clusters 59 gravitational wave 59 telescopes 59 gravitational waves 59 galaxies 58 Very Large Telescope 58 spiral galaxies 58 adaptive optics 58 brown dwarfs 58 gamma ray burst 57 X ray Observatory 57 rocky planets 57 Milky Way galaxy 57 astronomers 57 Earth asteroids 57 supernovae 57 NASA Chandra 57 globular clusters 57 multispectral 56 supernova remnant 56 terrestrial planets 56 extrasolar planet 56 infrared telescope 56 dwarf galaxy 56 exoplanet 56 Eta Carinae 56 astrophysical 56 occultation 56 HD #b [002] 56 cosmic rays 56 planets 56 gamma ray 56 Spitzer Space Telescope 56 gamma rays 56 hyperspectral 56 aerosol particles 55 spectra 55 JWST 55 astronomical observations 55 magnetar 55 dwarf galaxies 55 brown dwarf 55 ejecta 55 super Earths 55 supernova explosion 55 quasar 55 Earth magnetosphere 54 spiral galaxy 54 orbits 54 Hubble Telescope 54 spectrometers 54 muons 54 orbiting spacecraft 54 Saturn rings 54 neutron stars 54 THEMIS 54 telescope 54 Betelgeuse 54 luminosity 54 optical microscope 54 synthetic aperture radar 54 ESO Very Large Telescope 54 reflectance 53 WM Keck Observatory 53 confocal 53 Space Telescope 53 observatories