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Constellation Program

Constellation logo
The Constellation Program was NASA's now-abandoned program to send human explorers back to the Moon, and then on to Mars and other destinations in the solar system. Work on the program began in 2005 and ended five years later. Key elements of Constellation were the Ares launch vehicles, the Orion crew vehicle, and the Altair lunar lander. Of these, Orion has survived as the basis for the planned Multi-Purpose Crew Vehicle (MPCV).

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