Why did people fear the Sputnik?

People feared Sputnik because it represented a significant technological advancement by the Soviet Union, suggesting that they had achieved superiority in space exploration and, by extension, missile technology. This led to concerns about national security, as the ability to launch satellites also implied the potential for intercontinental ballistic missiles capable of delivering nuclear weapons. The launch of Sputnik in 1957 intensified the Cold War rivalry, creating a sense of urgency in the United States to compete in the space race, thus heightening public anxiety and paranoia about Soviet intentions.