In October 1957, Sputnik 1 crossed the sky every 96 minutes while two 1-watt transmitters on 20.005 and 40.002 megahertz sent a beep that radio amateurs around the world could hear on ordinary shortwave receivers
On the night of October 4, 1957, a polished aluminum sphere about the size of a beach ball began circling Earth at roughly 18,000 miles per hour, sending out a pulse that radio amateurs around the wo… [+6799 chars]
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