At Astrotech workers move the dolly with the Dawn spacecraft aboard.

At Astrotech, workers move the dolly with the Dawn spacecraft aboard. The spacecraft will be positioned next to a set of solar array panels for installation. Another set was installed previously. Together, the panels extend 64.6 feet when fully open. Dawn is scheduled to launch June 30 aboard a Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station. Dawn's mission is to explore two of the asteroid belt's most intriguing and dissimilar occupants: asteroid Vesta and the dwarf planet Ceres. Photo credit: NASA/George Shelton