Walter Sydney Adams
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Walter Sydney Adams was an American astronomer. He is renowned for his pioneering work in spectroscopy.
Adams in 1931
Adams at the Fourth Conference International Union for Cooperation in Solar Research at Mount Wilson Observatory, 1910
Absolute magnitude
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In astronomy, absolute magnitude is a measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale; the more luminous an object, the lower its magnitude numbe
Walter Sydney Adams
…stellar spectra. He worked on solar spectroscopy and co-discovered a relationship between the relative intensities of certain spectral lines and the absolute magnitude of a star. He was able to demonstrate that spectra could be used to determine whether a star was a giant or a dwarf. In 1915 he began a study of the…
Moon at first quarter