Earth at Night . ... Credit Copyright: C. Mayhew R. Simmon ( NASA / GSFC ), NOAA / NGDC , DMSP Digital Archive Explanation: This is what the Earth looks like at night. Can you find your favorite country or city ? Surprisingly, city lights make this task quite possible. Human-made lights highlight particularly developed or populated areas of the Earth's surface, including the seaboards of Europe , the eastern United States, and Japan . ... A service of: LHEA at NASA / GSFC . ...