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Look Up — Full Moon

gravity map (12.28) This is a gravity map of the moon from the NASA ‘Image of the day’ gallery, an example of the science I’m always going on about.

This image shows the variations in the lunar gravity field as measured by NASA’s Gravity Recovery and Interior Laboratory (GRAIL) during the primary mapping mission from March to May 2012. Very precise microwave measurements between two spacecraft, named Ebb and Flow, were used to map gravity with high precision and high spatial resolution. The field shown resolves blocks on the surface of about 12 miles (20 kilometers) and measurements are three to five orders of magnitude improved over previous data.

We needed some color.