An airplane, also known as an aeroplane or just plane, is a fixed-wing aircraft. It moves by thrust from a jet engine, propeller, or rocket engine. Airplanes come in many shapes and sizes. The use of aircraft is called aviation. Airplanes are used for many things including recreation, transportation of goods and people, military, and research. They can move much faster than road, rail or sea transport, and so they are often the choice for long distances.