This image of the United States at night is a composite assembled from data acquired by satellite in April and October 2012. NASA Earth Observatory image by Robert Simmon, using Suomi NPP VIIRS data provided courtesy of Chris Elvidge (NOAA National Geophysical Data Center)./NASA Earth Observatory hide caption
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This view of North America as seen in Google Earth shows colored areas that denote levels of light pollution as detailed in the New World Atlas of Artificial Sky Brightness. Fabio Falchi et al./AAAS hide caption
Light Pollution Hides Milky Way From 80 Percent Of North Americans, Atlas Shows
The Racetrack area in Death Valley National Park, which boasts one of the darkest night skies in the U.S. Dan Duriscoe/National Park Service hide caption