Sputnik 1 launch, first artificial satellite (October 4)
The launch of Sputnik 1, the world’s first artificial satellite, took place on October 4, 1957, by the Soviet Union.
The satellite weighed about 83 kilograms and measured 58 centimeters in diameter.
It was launched from the Baikonur Cosmodrome and marked the beginning of the space age and the space race between global powers.
After launch, Sputnik 1 transmitted simple radio signals for 21 days, which were received by scientists and amateur radio operators around the world.
The satellite orbited the Earth every 96 minutes in low Earth orbit.
The successful launch of Sputnik 1 had a profound impact on global politics, technology, and education, leading to increased investment in space research.
This event is recognized as a milestone in the history of science and technology and is commemorated in many countries as the start of the space age.
This date was added to the Gregorian calendar as an observance due to its historical significance and its broad influence on the development of space technology and international cooperation.