Exploration Systems Architecture Study

The Exploration Systems Architecture Study (ESAS) is the official title of a large-scale, system level study released by the National Aeronautics and Space Administration (NASA) in November 2005 in response to American president George W. Bush's announcement on January 14, 2004 of his goal of returning astronauts to the Moon and eventually Mars — known as the Vision for Space Exploration (and unofficially as "Moon, Mars and Beyond" in some aerospace circles, though the specifics of a manned "beyond" programme remain vague).

Read more about Exploration Systems Architecture Study:  Scope, Shuttle Based Launch System, CEV Configuration, Lunar Mission Profile, Extension To Mars, Costs, Criticism

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