What is first satellite in space?

The first satellite in space was Sputnik 1, launched by the Soviet Union on October 4, 1957. It was a spherical satellite about 58 centimeters in diameter and transmitted radio signals back to Earth, marking the beginning of the space age and the start of the space race. Sputnik 1 orbited the Earth approximately every 90 minutes before re-entering the atmosphere and burning up on January 4, 1958.