Related by context. Frequent words. (Click for all words.) 73 wavelengths 69 infrared wavelengths 67 interferometry 64 GRBs 64 interferometer 63 redshift 63 wavelength 63 photons 63 X ray emission 61 XMM Newton 61 optical telescopes 61 infrared radiation 61 spectra 61 spectroscopic 60 isotropic 60 diffraction 59 elliptical galaxies 59 supernova remnant 59 gravitational wave 58 gamma rays 58 infrared 58 gravitational lensing 58 HD #b [002] 58 laser pulses 58 occultation 57 phonons 57 unaided eye 57 spatial resolution 57 waveguides 57 auroral 57 Terahertz 57 anisotropy 57 photon 56 reflectance 56 distant galaxy 56 quasars 56 cosmic ray 56 astronomical objects 56 gamma ray burst 56 distant galaxies 56 magnetization 56 astronomical observations 56 optical 56 Andromeda Galaxy 55 Eta Carinae 55 globular cluster 55 quasar 55 spectroscopy 55 muons 55 photonic crystals 55 pulsars 55 gamma ray bursts 55 extrasolar planets 55 photodetectors 55 interstellar dust 55 femtoseconds 55 gravitational waves 55 THz 55 optical microscope 55 metamaterials 55 planet orbiting 54 galaxy cluster 54 spiral galaxy 54 terahertz 54 plasmonic 54 COROT 54 photodiodes 54 orbits 54 fluorescence 54 exoplanets 54 amplitudes 54 magnetosphere 54 cosmic rays 54 galaxy clusters 54 ionosphere 54 laser pulse 54 spiral galaxies 54 cosmic microwave background 54 telescopes 54 photodiode 54 Very Large Telescope 54 astrophysical 54 parallax 54 spectral 54 WIMPs 54 spacetime 53 aerosol particles 53 shorter wavelength 53 spectrometers 53 neutrino 53 metamaterial 53 dwarf galaxies 53 magnetar 53 WMAP 53 FRET 53 adaptive optics 53 astronomers 53 Milky Way Galaxy 53 celestial objects 53 JWST 53 X ray beam