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KENNEDY SPACE CENTER, FLA. -- In the Payload Handling Servicing Facility, an overhead crane lowers the Phoenix spacecraft onto a rotation stand for an interim weight and center of gravity determination. The Phoenix mission is the first project in NASA's first openly competed program of Mars Scout missions. Phoenix will land in icy soils near the north polar permanent ice cap of Mars and explore the history of the water in these soils and any associated rocks, while monitoring polar climate. Landing is planned in May 2008 on arctic ground where a mission currently in orbit, Mars Odyssey, has detected high concentrations of ice just beneath the top layer of soil. It will serve as NASA's first exploration of a potential modern habitat on Mars and open the door to a renewed search for carbon-bearing compounds, Photo credit: NASA/George Shelton