Photo Gallery: Satellite mounted atop Delta 2 rocket

Argentina's SAC-D satellite with NASA's Aquarius instrument was moved on May 20 from the payload processing facility on South Vandenberg to the Space Launch Complex 2 pad on North Vandenberg and hoisted atop the Delta 2 rocket. The two-piece nose cone was installed around the payload to complete the rocket's assembly process on May 28. Photos: NASA/VAFB

Space models