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The United States Army Signal Corps successfully conducts Project Diana, bouncing radio waves off the Moon and receiving the reflected signals.
Related Wikipedia articles
United States Army Signal Corps
U.S. Army's branch for communications and information systems
The United States Army Signal Corps (USASC) is a branch of the United States Army, responsible for creating and managing communications and information systems for the command and control of combined arms forces. It was established in 1860 by Major Albert J. Myer who played a…Source: Wikipedia (CC BY-SA)
Project Diana
1946 US Army Signal Corps experiment to reflect radar signals off of the Moon
Project Diana, named for the Roman moon goddess Diana, was an experimental project of the US Army Signal Corps in 1946 to bounce radar signals off the Moon and receive the reflected signals. This was the first experiment in radar astronomy and the first active attempt to probe…Source: Wikipedia (CC BY-SA)
Radio wave
Type of electromagnetic radiation
Radio waves are a type of electromagnetic radiation with the lowest frequencies and the longest wavelengths in the electromagnetic spectrum, typically with frequencies below 300 gigahertz (GHz) and wavelengths greater than 1 millimeter, about the diameter of a grain of rice.…Source: Wikipedia (CC BY-SA)
January 10
Day of the year
January 10 is the 10th day of the year in the Gregorian calendar; 355 days remain until the end of the year.Source: Wikipedia (CC BY-SA)