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10 things massive enough to be seen from space

Jan. 17, 2014, 10:44 a.m.
Earth at night from space

Photo: NASA

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Cities at night

Aside from the shapes of the continents, the most easy-to-identify geographic features seen from space are cities lit up at night. Only major cities have enough combined wattage to be seen from orbit, with a few even visible with the naked eye. In cases like the eastern half of the U.S., Western Europe and India, countless numbers of lights, bright and dim, combine to create one large illuminated area.