The NASA Space Shuttle was a reusable spacecraft system that operated from 1981 to 2011. It was designed to transport astronauts and cargo to and from low Earth orbit, including missions to the International Space Station and the Hubble Space Telescope. The shuttle consisted of an orbiter, solid rocket boosters, and an external fuel tank. During its 135 missions, the Space Shuttle played a crucial role in advancing space exploration and technology. It enabled the construction of the International Space Station and facilitated scientific research in microgravity. The program concluded with the final flight of STS-135 in July 2011.