Gravity_anomalies_on_Earth.jpg


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http://earthobservatory.nasa.gov/Features/GRACE/page3.php

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Public domain This file is in the public domain in the United States because it was solely created by NASA . NASA copyright policy states that "NASA material is not protected by copyright unless noted ". (See Template:PD-USGov , NASA copyright policy page or JPL Image Use Policy .)
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