NASA calls this image, which shows the night side of Earth twinkling with lights, "Black Marble." The photo is a composite assembled from data acquired by the Suomi National Polar-orbiting Partnership satellite, NASA says. The data was acquired over nine days in April 2012 and 13 days in October 2012. It took the satellite 312 orbits and 2.5 terabytes of data to get a clear shot of every parcel of Earth's land surface and islands. This new data was then mapped over existing imagery to provide a realistic view of the planet.
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