SOLAR SYSTEM

Detailed explanation-1: -On October 4, 1957, the Soviet Union launched the earth’s first artificial satellite, Sputnik I. The successful launch came as a shock to experts and citizens in the United States, who had hoped that the United States would accomplish this scientific advancement first.

Detailed explanation-2: -On October 4, 1957, nearly three centuries after Newton had proposed his theory, the Soviet Union launched the first Earth satellite, Sputnik 1. Sputnik circled Earth every 96 minutes, and its simple radio signal was heard by scientists and radio operators across the world.

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. in diameter) and weighing 183.9 pounds (83.6 kg), it orbited the Earth in around 98 minutes.

Detailed explanation-4: -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.

Detailed explanation-5: -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.