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Hoard of supermassive black holes found

Monday, 29 October 2007 Agençe France-Presse This artist’s impression shows the thick dust torus that astronomers believe surrounds many supermassive black holes and their accretion discs. When the torus is seen edge-on as in this case, much of the light and radiation emitted by the accretion disc is blocked, creating a “hidden” black hole. Image: ESA