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APOD: 2015 January 2 - At the Heart of Orion
Dense core of the Orion Nebula ~ About three million years old, the Orion Nebula was even more compact in its younger years and runaway stellar collisions long ago formed a black hole with more than 100 times the mass of the Sun. The Orion Nebula's distance of some 1,500 light-years would make it the closest known black hole to planet Earth.