Sputnik 2
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Sputnik 2, or Prosteyshiy Sputnik 2, launched on 3 November 1957, was the second spacecraft launched into Earth orbit, and the first to carry an animal into orbit, a Soviet space dog named Laika.
Model of Sputnik 2 at the Memorial Museum of Cosmonautics in Moscow
USSR postage stamp "Спутник-2"
Photograph of Sputnik 2 and its rocket taken by Air Force personnel at Air Force Missile Test Center, Patrick AFB, Florida, in March 1958.
Sputnik 1
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Sputnik 1, often referred to as simply Sputnik, was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet
Sputnik 2
…become Sputnik 3) to be finished was largely motivated by the desire to launch a satellite to orbit before the US. The first of these satellites, Sputnik 1 (PS-1), was successfully launched 4 October 1957, and became the world's first artificial satellite. Immediately following the launch, Nikita Khrushchev…
Replica of Sputnik 1 in the Museum of Space and Missile Technology (Saint-Petersburg)
Last remaining piece of Sputnik 1: metal arming key which prevented contact between batteries and transmitter prior to launch; on display at the Smithsonian National Air and Space Museum
30 kopek USSR stamp depicting Sputnik 1 orbiting the Earth, the Earth orbiting the Sun and the Sun orbiting the centre of the Milky Way galaxy
First ground track of Sputnik 1 on 13 October 1957 4:51 from Rodewisch