It's been thirty-five years since people last trod the dusty plains of the Moon.
Over the course of six landings from 1969 to 1972, twelve men explored,
four-wheeled, dug and hiked across the lunar surface. Now, NASA has plans for a
seventh landing on the Moon. This time, they want to stay. NASA's plans, dubbed
the Constellation architecture, involve the largest launch vehicle ever built,
new types of propulsion, and a six-person vehicle to ferry crews from Earth to
the Moon. But NASA's plans go far beyond Luna. Eventually, the lessons learned
on the Moon's outpost at Shackleton Crater will teach us how to live permanently
on