Sky Mapping Spacecraft

In this photo dated Aug. 18,2009 released by NASA work continues on the spacecraft at Vandenberg Air Force Base's Astrotech processing facility in California. The sky-mapping WISE, or Wide-Field Infrared Survey Explorer, is scheduled to launch no earlier than before dawn Friday from Vandenberg Air Force Base on the central California coast aboard a Delta 2 rocket. (AP Photo/NASA/Doug Kolkow)