Sputnik 1 (USSR, 1957)

First satellite, 1957. 92 days in orbit. Created NASA, launched the Space Race.

Sputnik 1’s launch on October 4, 1957, made it the first artificial satellite, a polished aluminum sphere 58 cm across and 83 kg that orbited Earth for 92 days, transmitting a simple radio beep heard by amateur operators worldwide. This achievement proved orbital spaceflight was feasible, directly triggering the U.S. creation of NASA in 1958 and igniting the Space Race. Every satellite today—GPS, weather, internet—descends from Sputnik’s pioneering 92-day mission.

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