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A supermassive black hole with millions to billions times the mass of our sun is seen in an undated NASA artist's concept illustration. In this illustration, the supermassive black hole at the center is surrounded by matter flowing onto the black hole in what is termed an accretion disk. This disk forms as the dust and gas in the galaxy falls onto the hole, attracted by its gravity. Also shown is an outflowing jet of energetic particles, believed to be powered by the black hole's spin, according to a NASA news release. (Photo by Reuters/NASA/JPL-Caltech)
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