Related by context. Frequent words. (Click for all words.) 63 interferometry 63 solar corona 62 visible wavelengths 62 shorter wavelengths 61 VLBA 61 optical microscopy 60 infrared wavelengths 60 spatial resolution 59 terahertz radiation 59 infrared 58 microwave radiation 58 infrared radiation 58 isotropic 58 X ray emission 58 spectroscopic 58 optical microscopes 58 InGaAs 58 astronomical objects 57 distant galaxies 57 interferometer 57 photodetector 57 spectroscopy 57 frequency comb 57 supernova remnant 57 attosecond 56 auroral 56 imager 56 pulsed laser 56 active galactic nuclei 56 redshift 56 amplitudes 56 ionised 56 photonic crystal 56 surface roughness 56 radiometer 56 spectrometry 56 diffraction 56 multispectral 56 optical telescopes 56 infrared rays 56 XMM Newton 56 NICMOS 56 electron beams 55 wavelengths 55 anisotropy 55 microwave frequencies 55 photometric 55 X ray beams 55 magnetic fields 55 femtosecond 55 nm wavelength 55 absorbance 55 -# degrees Fahrenheit [002] 55 gravitational waves 55 spectra 55 X ray beam 55 Raman spectroscopy 55 THz 55 electron density 55 laser pulses 55 GRBs 54 extrasolar planet 54 gravitational lensing 54 ionospheric 54 gravitational wave 54 wavefront 54 gamma rays 54 Hawking radiation 54 infrared telescope 54 temperature gradient 54 terahertz 54 Crab Nebula 54 dispersive 54 quasar 54 irradiance 54 ionosphere 54 hyperspectral 54 exciton 54 ionized gas 54 brown dwarfs 53 photodiode 53 #μm [001] 53 ejecta 53 GeV 53 cosmic microwave background 53 waveguides 53 photodiodes 53 magnifications 53 unaided eye 53 transmission electron microscope 53 HD #b [002] 53 optical microscope 53 photodetectors 53 supernova remnants 53 accretion disk 53 CCD camera 53 coronal 53 MeV 53 planetary nebulae 53 Eta Carinae 53 adaptive optics