Black Holes Are “Green,” X-Ray Study Says

Publication: National Geographic News   Date: April 24, 2006   View Article

Supermassive black holes are actually “green,” scientists announced today as they described a new study on the energy efficiency of black holes.

If cars were as fuel efficient as these black holes, researchers say, the vehicles could theoretically travel over a billion miles (1.6 billion kilometers) on a gallon of gasoline.

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