In January 1946, scientists working for the Signal Corps used a modified version of the antenna to bounce radio signals off the moon, more than 200,000 miles away from Earth. That accomplishment, which came a decade before the Soviet Union launched the first manmade satellite into orbit, demonstrated that it would be possible for people on Earth to communicate electronically with someone in space.
October 4, 2010 11:00 AM PDT
Photo by: U.S. Army
| Caption by: Jonathan Skillings
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