NASA’s Wide-field Infrared Survey Explorer (WISE) has surveyed more than 170,000 supermassive black holes and found that the galaxies whose black holes are hidden from view tend to be clumped together. With the new finding, the astronomers are reexamining a decades-old theory about the varying appearances of these interstellar objects. The unified theory of active supermassive black holes, … [Read more...]
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