Definition
NASA, or the National Aeronautics and Space Administration, is an independent agency of the U.S. federal government responsible for space exploration, aeronautics research, and scientific discovery. It's the group that sends rockets into space and probes to other planets. NASA conducts research on Earth's climate and develops new technologies for air and space travel. From the Apollo missions to the Mars rovers, NASA has pushed the boundaries of human knowledge and achievement. NASA's mission is to explore, discover, and expand our understanding of the universe.