William Wallace Campbell
April 11, 1862 – June 14, 1938
William Wallace Campbell was an American astronomer, and director of Lick Observatory. He specialized in spectroscopy.
Campbell was a pioneer of astronomical spectroscopy, he catalogued the radial velocities of stars, and was a director of Lick Observatory from 1901 to 1930. He served as 10th President of the University of California from 1923 to 1930.
He led a team to Australia in 1922 where he photographed a solar eclipse. The data obtained provided further evidence supporting Albert Einstein's theory of relativity.
Campbell was awarded the Henry Draper Medal (1906), the Gold Medal of the Royal Astronomical Society (1906) and the Bruce Medal (1915).
The Lunar crater Campbell, a crater on Mars and the asteroid 2751 Campbell are named in his honor.