Among other things, 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.
An expert in stellar spectroscopy, WalterSydneyAdams (1876-1956) made important empirical contributions to the analysis of the physical conditions of stellar and planetary atmospheres, determining the distances to extragalactic objects, and understanding stellar evolution.
An expert in stellar spectroscopy, WalterSydneyAdams was born of American missionary parents in the Syrian village of Kassab in 1876.
In recognition of his efforts, Adams was elected to the American Philosophical Society in 1915, and was awarded the Gold Medal of the Royal Astronomical Society in 1917, and the Draper Medal of the National Academy of Sciences in 1918.