NASA's Lunar Trailblazer mission is almost ready for liftoff. The Lockheed Martin-built Lunar Trailblazer satellite is fairly small as satellites go, measuring just 11.5 feet (3.5 meters) wide and ...

NASA’s Lunar Trailblazer sits in a clean room at Lockheed Martin Space in Littleton, Colo., shortly after being integrated with its second and final science instrument, the Lunar Thermal Mapper.

NASA’s Lunar Trailblazer, a small but powerful satellite, is set to launch Wednesday evening. Its mission? To understand how water behaves on the moon’s surface.