NIGHT LIGHTS: Earth's city lights as seen from space. The brightest areas of the Earth are the most urbanized, but not necessarily the most populated. More than a century after the invention of the electric light, many parts of the planet remain thinly populated and unlit. Image created with data from the Defense Meteorological Satellite Program Operational Linescan System.

Earth's city lights as seen from space. The brightest areas of the Earth are the most urbanized, but not necessarily the most populated. More than a century after the invention of the electric light, many parts of the planet remain thinly populated and unlit. Image created with data from the Defense Meteorological Satellite Program Operational Linescan System.

Credit

Image and caption adapted from NASA's Earth Observatory. Credit: Data courtesy of Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC. Image by Craig Mayhew and Robert Simmon, NASA GSFC.

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