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

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Fabio Falchi et al./AAAS

Light Pollution Hides Milky Way From 80 Percent Of North Americans, Atlas Shows

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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

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Dan Duriscoe/National Park Service