At Astrotech Space Operations in Titusville, Fla., the STEREO spacecraft, seen here, is ready for installation of solar arrays. STEREO consists of two spacecraft whose mission is the first to take measurements of the sun and solar wind in 3-D. This new view will improve our understanding of space weather and its impact on the Earth. Preparations are under way for a liftoff aboard a Delta rocket no earlier than July 22. Photo credit: NASA/George Shelton