Frank Schlesinger

Frank Schlesinger (born May 11, 1871, New York City—died July 10, 1943, Lyme, Conn., U.S.) was an American astronomer who pioneered in the use of photography to map stellar positions and to measure stellar parallaxes, from which the most direct determinations of distance can be made. From 1899 to 1903 Schlesinger was in charge of the International Latitude Observatory at Ukiah, Calif. He then was appointed astronomer at the Yerkes Observatory, Williams Bay, Wis., where...