NASA, or the National Aeronautics and Space Administration, is the United States government agency responsible for the nation's civilian space program and for aeronautics and aerospace research. Established in 1958, NASA has been at the forefront of space exploration, conducting missions that have expanded our understanding of the universe, including the Apollo moon-landing missions and the Mars Rover explorations. In addition to human spaceflight, NASA is also known for its robotic missions, such as the Hubble Space Telescope and the Voyager spacecraft. These missions have provided invaluable data about our solar system and beyond, helping to answer fundamental questions about the origins of life and the nature of the cosmos.