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
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