On October 4, 1957, the Soviet Union launched Sputnik 1, the first artificial satellite, into space. The event marked the beginning of the space race between the Soviet Union and the United States during the Cold War. Sputnik 1s launch shocked the world, demonstrating the Soviet Unions technological prowess and igniting fears of American vulnerability. The satellites radio signals were detectable by radio operators worldwide, and its success led to rapid advancements in both space exploration and military technology. The event marked a turning point in the development of space science and technology.