Maria Zuber nke Massachusetts Institute of Technology bụ onye nyocha nke GRAIL. NASA's Jet Propulsion Laboratory na-ejikwa ọrụ ahụ. Site na August 5, 2011, ihe omume ahụ ejirila US $ 496 nde. Mgbe a na-ebute ụgbọelu ahụ, a kpọrọ aha GRAIL A na GRAIL B ma meghee asọmpi maka ụmụaka ụlọ akwụkwọ ịhọrọ aha. Ihe fọrọ nke nta ka ọ bụrụ klas 900 sitere na steeti 45, Puerto Rico na District nke Columbia, sonyere na asọmpi ahụ. Aha mmeri, Ebb na Flow, bụ ụmụ akwụkwọ nke 4th na Emily Dickinson Elementary School na Bozeman, Montana.
Ụlọ Ọrụ NASA Na-ahụ Maka Ụgbọelu Ndị Na-aga n'Ihu