About William Wallace Campbell
William Wallace Campbell was an American astronomer, and director of Lick Observatory from 1901 to 1930. He specialized in spectroscopy. He was the tenth president of the University of California from 1923 to 1930. In 1893 he discovered the Wolf–Rayet star HD 184738 (also known as Campbell's hydrogen envelope star). William Wallace Campbell (April 11, 1862 – June 14, 1938) was an American astronomer, and director of Lick Observatory from 1901 to 1930.
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