NASA Deputy Administrator Shana Dale, who is guiding the long-term strategy development effort among 14 of the world's space agencies, said, "This strategy will enable interested nations to leverage their capabilities and financial and technical contributions, making optimum use of globally available knowledge and resources to help energize a coordinated effort that will propel us into this new age of discovery and exploration."

The Global Exploration Strategy focuses on two overarching issues: Why we are returning to the moon and what we plan to do when we get there. The strategy includes a comprehensive set of the reasons for embarking upon human and robotic exploration of the moon. NASA's proposed lunar architecture focuses on a third issue: How humans might accomplish the mission of exploring the moon.

In April 2006, NASA initiated development of the Global Exploration Strategy in order to meet a congressional mandate, as well as to accomplish goals outlined in the agency's strategic plan and the Vision for Space Exploration. The strategy is evolving from a lengthy dialogue among more than 1,000 individuals, including experts from NASA and 13 other space agencies, as well as non-governmental organizations and commercial interests. Experts from the Australian, Canadian, Chinese, European, French, German, British, Indian, Italian, Japanese, Russian, South Korean and Ukrainian space agencies participated.

NASA planners used the international group's deliberations as well as input from academia, private sector and private citizens as the basis for sketching a U.S. blueprint for a return to the moon. NASA's Lunar Architecture Team, chartered in May 2006, concluded that the most advantageous approach is to develop a solar-powered lunar base and to locate it near one of the poles of the moon.

With such an outpost, NASA can learn to use the moon's natural resources to live off the land, make preparations for a journey to Mars, conduct a wide range of scientific investigations and encourage international participation.

"The architecture work has resulted in an understanding of what is required to implement and enable critical exploration objectives," said Doug Cooke, deputy associate administrator, Exploration Systems Directorate. "This is all important as we continue the process we have begun and better define the architecture and our various exploration roles in what is a very exciting future for the United States and the world."

As currently envisioned, an incremental buildup would begin with four-person crews making several seven-day visits to the moon until their power supplies, rovers and living quarters are operational. The first mission would begin by 2020. These would be followed by 180-day missions to prepare for journeys to Mars.

The proposed lunar architecture calls for robotic precursor missions designed to support the human mission. These precursors include landing site reconnaissance, natural resource assays and technology risk reduction for the human lander.

Moving into 2007, NASA will continue to refine its lunar architecture, maintaining the open dialogue initiated in 2006, to enhance further the Global Exploration Strategy. NASA's goal is to enable a sustainable space exploration effort in which participating organizations can achieve individual goals with mutually beneficial results.

Both the Global Exploration Strategy and NASA's lunar architecture will be discussed in depth at the second Space Exploration Conference, Dec. 4-6, at the George R. Brown Convention Center in Houston.

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