National Air and Space Museum, in Washington, D.C., features exhibits on aviation and space flight. It is part of the Smithsonian Institution. The museum has more than 20 galleries, a theater, and a planetarium. The displays include the Wright brothers' 1903 Flyer; Charles A. Lindbergh's Spirit of St. Louis; X-1 and X-15 aircraft; and Mercury, Gemini, and Apollo spacecraft. Museum visitors may touch a rock from the moon and walk through a Skylab space station.