The acronym "NASA" stands for the National Aeronautics and Space Administration. This United States government agency was established in 1958 and is responsible for the nation's civilian space program and for aeronautics and aerospace research. NASA's mission encompasses a wide range of activities, including human spaceflight, robotic exploration of other planets, climate research, and advancements in technology that support aviation and space exploration. The agency has achieved significant milestones, such as the Apollo moon-landing missions and the Mars rover missions, cementing its role as a leader in scientific exploration and innovation.