USA HISTORY

Detailed explanation-1: -Sputnik, any of a series of three artificial Earth satellites, the first of whose launch by the Soviet Union on October 4, 1957, inaugurated the space age. Sputnik 1, the first artificial satellite launched, was a 83.6-kg (184-pound) capsule.

Detailed explanation-2: -Sputnik and the Dawn of the Space Age History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I.

Detailed explanation-3: -Officially, Sputnik was launched to correspond with the International Geophysical Year, a solar period that the International Council of Scientific Unions declared would be ideal for the launching of artificial satellites to study Earth and the solar system.

Detailed explanation-4: -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. On October 4, 1957, the USSR launched Sputnik, the first artificial satellite to orbit Earth.

Detailed explanation-5: -Sputnik 2 (Russian pronunciation: [ˈsputʲnʲɪk], Russian: -2, Satellite 2), or Prosteyshiy Sputnik 2 (PS-2, Russian: 2, Simplest Satellite 2) was the second spacecraft launched into Earth orbit, on 3 November 1957, and the first to carry an animal into orbit, a Soviet space dog named Laika.