The Sputnik 1 Launch: The First Artificial Satellite To Enter Earth's Orbit | Mach | NBC News
Sputnik - 60 years on from the Start of the Space Race
Launch of Sputnik, October 4, 1957
The Moment Sputnik Terrified & Thrilled Americans
Soviet Union launched Sputnik 1, first artificial satellite in history. It was a metal sphere, 58 centimetres in diameter, with four long radio antennas. It was visible by naked eye and broadcasted radio pulses detectable by amateur radio enthusiasts. People organized parties to spot Sputnik. It worked 21 days and completed 1440 orbits.