Astronomers have obtained the sharpest-ever X-ray spectrum of an iconic active galaxy, providing the most accurate, precise ...
One of the most detailed spectrographs ever recorded of the Sun has revealed hundreds of missing wavelengths—gaps in the ...
SPECTROSCOPIC investigations on the scattering of light in crystals show very plainly that their vibration spectra have a discrete structure manifesting itself as a set of lines with sharply defined ...