Inside an environmental enclosure at Vandenberg Air Force Base's processing facility in California, solar panels line the sides of NASA's NuSTAR, which was just joined to the Orbital Sciences Pegasus XL rocket. The uniting of the spacecraft with the rocket is a major milestone in prelaunch preparations.
For more information, visit http://www.nasa.gov/nustar.
Image credit: NASA/Randy Beaudoin, VAFB