The Phoenix Mars Lander spacecraft undergoes illumination testing of its solar array panels, in the Payload Hazardous Servicing Facility. The Phoenix will be launched toward Mars to land in icy soils near the planet's north polar permanent ice cap. It will explore the history of the water in these soils and any associated rocks, while monitoring polar climate. Phoenix may provide important answers to questions including: can the Martian arctic support life? What is the history of water at the landing site? Also, how is the Martian climate affected by polar dynamics?

Landing on Mars is planned in May 2008 on arctic ground. This location has been identified by a mission currently in orbit, Mars Odyssey, as containing high concentrations of ice just beneath the top layer of soil. Phoenix is scheduled to launch Aug. 3 from Cape Canaveral Air Force Station.

The Phoenix Mars Mission is the first in NASA's Scout Program. The program is designed to complement major missions being planned as part of NASA's Mars Exploration Program.

• Phoenix Readies for Launch
• The Phoenix Has Landed: Mars Probe Airlifted to KSC from Colorado
• Detailed Look at the Next Mars Lander

-- NASA and SPACE.com Staff

Credit: NASA/Kim Shiflett