Constellation program
 |
|
| Country of origin | United States |
|---|---|
| Responsible organization | NASA |
| Purpose | Crewed lunar landing |
| Status | Cancelled 2009 |
| Program history | |
| Cost | $230 billion (2004), estimated |
| Program duration | 2005–2025 (planned) |
| First flight | Ares 1-X |
| Last flight | Ares 1-X |
| Successes | 1 |
| Launch site(s) | Kennedy Space Center LC-39 |
| Vehicle information | |
| Vehicle type | Capsule |
| Crew vehicle | |
| Crew capacity | 4 |
| Launch vehicle(s) | |
The Constellation Program (abbreviated CxP) was a human spaceflight program developed by NASA, the space agency of the United States, from 2005 to 2009. The major goals of the program were "completion of the International Space Station" and a "return to the Moon no later than 2020" with a crewed flight to the planet Mars as the ultimate goal. The program's logo reflected the three stages of the program: the Earth (ISS), the Moon, and finally Mars—while the Mars goal also found expression in the name given to the program's booster rockets: Ares (The Greek equivalent of the Roman god Mars). The technological aims of the program included the regaining of significant astronaut experience beyond low Earth orbit and the development of technologies necessary to enable sustained human presence on other planetary bodies.
Constellation began in response to the goals laid out in the Vision for Space Exploration under NASA Administrator Sean O'Keefe. O'Keefe's successor, Michael D. Griffin, ordered a complete review, termed the Exploration Systems Architecture Study, which reshaped how NASA would pursue the goals laid out in the Vision for Space Exploration, and its findings were formalized by the NASA Authorization Act of 2005. The Act directed NASA to "develop a sustained human presence on the Moon, including a robust precursor program to promote exploration, science, commerce and US preeminence in space, and as a stepping stone to future exploration of Mars and other destinations." Work began on this revised Constellation Program, to send astronauts first to the International Space Station, then to the Moon, and then to Mars and beyond.
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