Abstract
THE NEBULAR AND AURORAL SPECTRA. AFTER the first period of success in identifying the origin of the spectral lines of the sun and stars with terrestrial materials, certain outstanding cases remained which were obviously important, but in which the identification could not readily made. The first of these cases to yield was that helium, which was inravelled while some of pioneers in astronomical spectroscopy were active.
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RAYLEIGH, L. Some Problems of Cosmical Physics, Solved and Unsolved. Nature 124, 185–186 (1929). https://doi.org/10.1038/124185a0
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DOI: https://doi.org/10.1038/124185a0