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en.wikipedia.org/wiki/Sputnik_1

Sputnik 1 (/ ˈ s p ʊ t n ɪ k / or / ˈ s p ʌ t n ɪ k /; "Satellite-1", or "PS-1", Простейший Спутник-1 or Prosteyshiy Sputnik-1, "Elementary Satellite 1") was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957, orbiting for three weeks before its batteries died, then silently for two more months befor...

www.history.com/.../soviet-union-launches-sputnik-i

The successful launch of the unmanned satellite Sputnik I by the Soviet Union in October 1957 shocks and frightens many Americans. As the tiny satellite orbited the earth, Americans reacted with ...

history.nasa.gov/sputnik

History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. 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 ...

worldhistoryproject.org/1957/10/4/soviet-union-launches...

Sputnik 1 was the world's first Earth-orbiting artificial satellite. It was launched into a low altitude elliptical orbit by the Soviet Union on 4 October 1957, and was the first in a series of satellites collectively known as the Sputnik program.

www.history.com/this-day-in-history/sputnik-launched

The Soviet Union inaugurates the “Space Age” with its launch of Sputnik, the world’s first artificial satellite. The spacecraft, named Sputnik after the Russian word for “satellite,” was ...

www.thoughtco.com/sputnik-1-first-artificial-satellite-3071226

On October 4, 1957, the Soviet Union stunned everyone by launching the world's first artificial satellite, Sputnik 1. It was an event that galvanized the world and spurred the fledgling U.S. space effort into high gear. No one who was alive at that time can forget the electricity of the moment when humans first lofted a satellite into orbit.

en.wikipedia.org/wiki/Sputnik_2

Sputnik 2 was launched into space only 32 days after its predecessor Sputnik 1. Due to the huge success of Sputnik 1, Nikita Khrushchev ordered Sergey Korolev back to work creating a Sputnik 2 that needed to be ready for space for the 40th anniversary of the Bolshevik revolution.

www.nationalgeographic.org/thisday/oct4/ussr-launches-sputnik

On October 4, 1957, the USSR launched Sputnik, the first artificial satellite to orbit Earth. The USSR rocketed to the lead in the Cold War's "Space Race" with the launch of Sputnik, a basketball-sized satellite that became the first manmade object to orbit the Earth ...

cosmosmagazine.com/space/how-sputnik-1-launched-the-space-age

Sputnik 1 was evocatively described as the world’s first artificial moon in news reports at the time, but it was a very small one; its diameter was slightly less than the length of two standard ...

www.space.com/17563-sputnik.html

With a single shot, the Soviet Union not only launched the first artificial satellite but also officially inaugurated a "space race" with the United States. Sputnik – sometimes called Sputnik 1 ...