GENERAL KNOWLEDGE

Detailed explanation-1: -On October 4, 1957, the Soviet Union launched the earth’s first artificial satellite, Sputnik I.

Detailed explanation-2: -Sputnik 1 (/ˈspʌtnɪk, ˈspʊtnɪk/; see § Etymology) 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 space program. It sent a radio signal back to Earth for three weeks before its three silver-zinc batteries ran out.

Detailed explanation-3: -On October 4, 1957, the Soviet Union successfully launched Sputnik-1, the world’s first artificial satellite. Only about the size of a beach ball (22.8 inches or 58 cm.

Detailed explanation-4: -On Oct. 4, 1957, Sputnik 1 successfully launched and entered Earth’s orbit. Thus, began the space age. The successful launch shocked the world, giving the former Soviet Union the distinction of putting the first human-made object into space.