The study analyzed data brought by the NASA Gravity Recovery and Interior Laboratory (GRAIL) mission, which proves the speculation to be true. The GRAIL mission had two spacecraft orbit the moon ...

The finding could explain the long-running mystery of why the surfaces of the lunar near and far sides are so different.

An exhaustive examination of lunar gravity using data obtained by two NASA robotic spacecraft is offering new clues about why ...

Data from NASA’s twin Gravity Recovery and Interior Laboratory (GRAIL) probes has been used to create the highest resolution gravity map yet of any body in the Solar System. The two washing ...

A Delta 2 Heavy rocket propels NASA's twin Gravity Recovery and Interior Laboratory (GRAIL) mission into the clouds over Cape Canaveral Air Force Station in Florida. The spacecraft launched at 9: ...

In 2012, NASA rang in the New Year with a fresh mission — sending the Gravity Recovery And Interior Laboratory, also known as GRAIL, spacecraft to the moon. As the first endeavor intended to ...

Near-identical twins Grail-A and Grail-B -- short for Gravity Recovery and Interior Laboratory -- are due to blast off Thursday aboard an unmanned rocket. Although launched together, the two ...

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The data from the U.S. space agency's GRAIL, or Gravity Recovery and Interior Laboratory, mission indicates that the moon's deep interior has an asymmetrical structure, apparently caused by ...