GRAIL on the Pad
NASA's GRAIL twin spacecraft await launch atop a United Launch Alliance Delta II rocket at Cape Canaveral Air Force Station, Fla.
Image credit: NASA/JPL-Caltech/United Launch Alliance, Thom Baur
GRAIL on the PadNASA's GRAIL twin spacecraft await launch atop a United Launch Alliance Delta II rocket at Cape Canaveral Air Force Station, Fla.
Image credit: NASA/JPL-Caltech/United Launch Alliance, Thom Baur