do you know ?? first radio satellite launched into space??
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I don't know if you can explain the quotation
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Sputnik 1
In 1957, the world was surprised to see the Soviets launch the first satellite into orbit, with most expecting the USA to be the first to do so. The satellite, named Sputnik 1, transmitted a simple radio signal back to earth for 21 days and remained in orbit for a further 6 months.
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