A "reference mission" is a continual work in progress, provided to the space community to critique and build upon. Future human exploration analysis activities will focus on exploration targets such as the Moon, Asteroids, or other destinations beyond Earth orbit. Further addenda will be published which

document these changes to the mission, changes which will undoubtedly be made before it becomes a reality. Through this process, the Exploration Team can nurture the design of human exploration missions which offer a safe and economical strategy for taking the next step in humanity’s exploration and development of space.

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