NASA stands for the National Aeronautics and Space Administration. This United States government agency is responsible for the nation's civilian space program and for aeronautics and aerospace research. Established in 1958, NASA conducts space exploration missions, scientific discovery, and plays a vital role in advancing technology through research and development. It has been responsible for significant achievements such as the Apollo moon-landing missions, the Space Shuttle program, and the Mars Rover missions. Through its various endeavors, NASA seeks to expand human knowledge and understanding of the universe, inspiring future generations to engage in science, technology, engineering, and mathematics (STEM).