On January 10, 1946, the U.S. Army bounced radar signals off of Earth's moon for the first time ever. Known as "Project Diana," this was the first experiment in radio astronomy.
On This Day in Space! Jan. 10, 1946: Radio Astronomy is Born!
Welcome to "On This Day ... in Space!" where we peer back in our archives to find historic moments in spaceflight and astronomy. So enjoy a blast from the past with Space.com's Hanneke Weitering to look back at what happened on this day in space!
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