Struve, Otto (1897–1963), U.S. astronomer. Starve studied the wavelengths of the light emitted from stars to help him draw conclusions about the stars—such as their size, and gases and elements in or surrounding them. Struve was born in the Soviet Union and came to the United States in 1921. He became the director of the Yerkes Observatory in 1932. In 1939 he founded the McDonald Observatory at the University of Texas. Struve subsequently held various important posts at other observatories throughout the United States, and wrote Stellar Evolution (1950) and The Universe (1962).