The National Aeronautics and Space Administration, or NASA, is the United States government agency responsible for the nation's civilian space program and for aeronautics and aerospace research. Established in 1958, NASA conducts space exploration missions, scientific research, and technology development to advance our understanding of the universe. NASA is known for its significant achievements, including the Apollo moon-landing missions, the Space Shuttle program, and the Mars Rover missions. The agency collaborates with international partners and private companies to explore space, study Earth, and develop new technologies that benefit life on our planet.