At Cape Canaveral Air Force Station the first stage of a United Launch Alliance Delta II launch vehicle is being lifted.

At Cape Canaveral Air Force Station in Florida, the first stage of a United Launch Alliance Delta II launch vehicle is being lifted into the Pad 17B gantry. The Delta II will carry NASA's Gravity Recovery and Interior Laboratory, or GRAIL, spacecraft into lunar orbit.

The GRAIL mission is a part of NASA's Discovery Program. GRAIL will fly twin spacecraft in tandem orbits around the moon for several months to measure its gravity field. The mission also will answer longstanding questions about Earth's moon and provide scientists a better understanding of how Earth and other rocky planets in the solar system formed. GRAIL is scheduled to launch September 8, 2011. For more information visit: http://science.nasa.gov/missions/grail/. Photo credit: NASA/Jim Grossmann