Related by context. Frequent words. (Click for all words.) 74 infrared wavelengths 68 wavelengths 67 visible wavelengths 66 infrared 64 shorter wavelengths 63 solar corona 62 interferometry 60 wavelength 60 magnifications 60 X ray emission 59 multispectral 59 spectra 59 spatial resolution 59 infrared radiation 59 spectroscopic 59 X ray beam 59 photometric 58 diffraction 58 absorbance 58 infrared spectroscopy 58 spectral 58 irradiance 58 XMM Newton 58 nm wavelength 58 laser pulses 57 auroral 57 optical microscopy 56 photodetector 56 InGaAs 56 celestial object 56 fluorescence 56 astronomical objects 56 unaided eye 56 brightness 56 interferometer 56 anisotropy 56 infrared laser 55 ionospheric 55 NICMOS 55 optical microscope 55 CCD camera 55 reflectance 55 photonic crystal 55 infrared rays 55 Orion Nebula 55 ecliptic 55 radiometer 55 redshift 55 SWIR 55 laser pulse 54 wavefront 54 NASA Aqua 54 MODIS 54 diffractive 54 amplitudes 54 microwave frequencies 54 Crab Nebula 54 spectrometer 54 infra red 54 fluorescence imaging 54 X ray beams 54 fluorescence microscopy 54 ultraviolet 54 particle sizes 54 solar irradiance 54 electromagnetic spectrum 53 frequency comb 53 synthetic aperture radar 53 VLBA 53 fluorescent dyes 53 ESO Very Large Telescope 53 photodetectors 53 infrared spectrometer 53 terahertz radiation 53 hyperspectral 53 planetary nebulae 53 aurora 53 fluoresce 53 spectroscopy 53 Gamma ray bursts 53 optical telescopes 53 GeV 53 scanning electron microscope 53 latitudes 53 attosecond 53 transmittance 53 morphologies 53 occultation 53 GRBs 53 photodiodes 53 supernova remnant 52 Hubble observations 52 Infrared 52 focal lengths 52 photodiode 52 picoseconds 52 imager 52 planetary nebula 52 dispersive 52 THz 52 Moderate Resolution