Video: 'Radar Makes Round Trip To Moon 1946-01-31 Universal Newsreel Project Diana Earth-Moon-Earth'

(Thursday, January 10, 1946, 11:58 a.m. EST) — The first man-made contact with the moon was made today as radar signals transmitted by the U.S. Army Signal Corps from a laboratory in Belmar, New Jersey, as part of Project Diana were bounced off the lunar surface, measuring its exact distance from the Earth (a mean of 238,857 miles or 384,403 kilometers), and proving that communication is possible between Earth and outer space.