William Wallace Campbell

William Wallace Campbell (April 11 1862 - June 14 1938) was an American Astronomer.

He was director of Lick Observatory from 1900 to 1930. He specialized in Spectroscopy.

Honors

• Henry Draper Medal (1906)
• Gold Medal of the Royal Astronomical Society (1906)
• Bruce Medal (1915)

• Campbell crater on the Moon
• Crater on Mars
• Asteroid 2751 Campbell