Washington, Sept 11 :Twin satellites blasted off aboard a rocket Saturday on a mission to unveil the inner secrets of the moon, the US space agency NASA said.
The Grail spacecraft launch at 9.08 am aboard a Delta II rocket from an Air Force base adjacent to NASA's facilities at Cape Canaveral, Florida.
The blastoff had been postponed twice due to bad weather on Thursday and Friday.The two small Grail spacecraft - which are about the size of washing machines - will fly in formation above the moon's surface to map its gravity.
“Trying to understand how the moon formed, and how it evolved over its history, is one of the things we're trying to address with the Grail mission,” said researcher Maria Zuber of the Massachusetts Institute of Technology.
By measuring variations in gravity across the moon's surface over three months, scientists hope to learn how the interior formed, which should also provide general clues about how rocky planets form, Ms. Zuber said.AP
