Click on the image for the animation

This animation depicting the crustal thickness of the moon was derived using gravity data from NASA's GRAIL mission and topography data from NASA's Lunar Reconnaissance Orbiter. The measurements match those found via seismic data at the NASA Apollo mission 12 and 14 landing sites, where crustal thickness is 19 miles (30 kilometers). There is a minimum crustal thickness less than 0.6 mile (1 kilometer) within the nearside Crisium and far side Moscoviense impact basins. The average thickness of the crust is 21 miles (34 kilometers), which is almost 12 miles (20 kilometers) thinner than values from previous studies.

This animation starts on the nearside hemisphere and then rotates to show the entire moon. Regions of crustal thinning in blue are associated with several large impact basins several hundreds of kilometer in diameter. The far side differs from the near side by having a higher than average crustal thickness (in red).

NASA's Jet Propulsion Laboratory in Pasadena, Calif., manages the GRAIL mission for NASA's Science Mission Directorate in Washington. The Massachusetts Institute of Technology, Cambridge, is home to the mission's principal investigator, Maria Zuber. GRAIL is part of the Discovery Program managed at NASA's Marshall Space Flight Center in Huntsville, Ala. Lockheed Martin Space Systems in Denver built the spacecraft. The California Institute of Technology in Pasadena manages JPL for NASA.

For more information about GRAIL, please visit http://grail.nasa.gov.