- October 4, 1957, the Soviet Union launched sputnik I into space
- The world's very first artificial satellite
- Size of a beach ball (58cm or 22.8 inches in diameter)
- Weighed 183.9lbs or 83.6kg
- Started the U.S.-USSR Space Race
As a technical achievement the Sputnik I caught the world's attention, and also off-guard. In addition, the public feared the Soviet's ability to launch satellites which also translated into the ability to launch ballistic missiles that could carry nuclear weapons from the USSR to the US. The Soviets struck again not to long after on November 3, launching the Sputnik II, which also carried a dog named Laika.