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         Space shuttle: reusable space vehicle 
          used for travel between a space station and Earth. 
          Rudder: part of the shuttle used for turning. 
          Manoeuvring engine: engine used to steer the shuttle. 
          Main engines: engines that enable the shuttle to enter and leave 
          space. 
          Body flap: hinged movable shuttle panel. 
          Tank: part of the shuttle containing stored fuel. 
          Wing: lift plane of the shuttle. 
          Cargo-bay door: part of the shuttle that, when open, provides 
          access to the payload. 
          Orbital rendezvous light: light that announces a link-up if two 
          space vehicle. 
          Forward control thrusters: system that alters or stabilizes the 
          altitude of the shuttle. 
          Engine: the shuttle's system of locomotion. 
          Star tracker: system of positioning by the stars. 
          Living quarters and flight deck: part of the shuttle where astronauts 
          can work and pilot the shuttle without wearing spacesuits. 
          Special launch: system used to start the shuttle in an emergency. 
          Remote-control arm: system used to catch a satellite in need 
          of repair. 
          Elevons: shuttle systems that are used as ailerons and rudders. 
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