Related by context. Frequent words. (Click for all words.) 73 infrared wavelengths 70 wavelengths 66 infrared radiation 66 redshift 64 X ray emission 62 distant galaxies 60 ejecta 60 supernova remnant 60 unaided eye 60 luminosity 60 galaxy cluster 59 HD #b [002] 59 optical telescopes 59 XMM Newton 59 diffraction 58 interferometry 58 gamma rays 58 reflectance 58 anisotropy 58 GRBs 58 gamma ray burst 58 brightness 57 spectra 57 distant galaxy 57 infrared 57 multispectral 57 gravitational lensing 57 radiative 57 interstellar dust 57 spectroscopic 57 quasars 57 electromagnetic spectrum 57 spatial resolution 56 photodiodes 56 reflectivity 56 Orion Nebula 56 photons 56 wavelength 56 quasar 56 ultraviolet light 56 refractive index 56 comet nucleus 56 fluorescence 56 mid latitudes 55 umbra 55 cosmic rays 55 silicates 55 ionosphere 55 Eta Carinae 55 cosmic ray 55 cosmic microwave background 55 ultraviolet 55 magnetosphere 55 Very Large Telescope 55 laser pulses 54 starlight 54 THz 54 spectral 54 interstellar medium 54 celestial objects 54 extrasolar planets 54 electron volts 54 pixels 54 polar regions 54 galaxy clusters 54 magnetic fields 54 gamma ray 54 water vapor 53 extrasolar planet 53 parallax 53 albedo 53 terahertz 53 supernova explosion 53 galaxies 53 UV light 53 greyscale 53 elliptical galaxies 53 magnetization 53 radioactive decay 53 neutrinos 53 bandgap 53 fluorescent dyes 53 apertures 53 olivine 53 refraction 53 Spitzer Space Telescope 53 spiral galaxies 53 exoplanets 53 iron oxides 53 heliosphere 52 nebulae 52 fluoresce 52 focal lengths 52 fluorescent proteins 52 infrared spectrometer 52 deuterium 52 luminescence 52 planets orbiting 52 photodiode 52 Iapetus 52 nebula