The first human-made satellite launched into space by the Soviet Union was named Sputnik 1. It was successfully launched on October 4, 1957, marking a significant milestone in the Space Race and the beginning of the satellite era. Sputnik 1 transmitted radio pulses that could be received on Earth, providing the first evidence of human-made objects in orbit. Its launch shocked the world, particularly the United States, prompting increased investment in space exploration and technology, ultimately leading to advancements in both military and civilian applications.