Sputnik I

On October 5, 1957 at 1:28am local time, the Soviet Union successfully launched Sputnik I, world’s first artificial satellite.

History changed on that date. The world’s first artificial satellite was about the size of a beach ball (58 cm.or 22.8 inches in diameter), weighed only 83.6 kg. or 183.9 pounds, and took about 98 minutes to orbit the Earth on its elliptical path. That launch ushered in new political, military, technological, and scientific developments. While the Sputnik launch was a single event, it marked the start of the space age and the U.S.-U.S.S.R space race.



Sputnik

The Sputnik launch changed everything. As a technical achievement, Sputnik caught the world’s attention and the American public off-guard. In addition, the public feared that the Soviets’ ability to launch satellites also translated into the capability to launch ballistic missiles that could carry nuclear weapons from Europe to the U.S. Then the Soviets struck again; on November 3, Sputnik II was launched, carrying a much heavier payload, including a dog named Laika.

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source NASA