Definition of Orion (spacecraft)

Orion is a spacecraft design currently under development by the National Aeronautics and Space Administration (NASA). Each Orion spacecraft will carry a crew of four to six astronauts, and will be launched by the new Ares I launch vehicle. Both Orion and Ares I are elements of NASA's Project Constellation, which plans to send human explorers back to the Moon by 2020, and then onward to Mars and other destinations in the solar system. On August 31, 2006, NASA awarded Lockheed Martin (LM) the contract to design, develop, and build Orion.