The supermassive black hole at the heart of a recently discovered galaxy is much larger than it should be, and astronomers don't know why. The galaxy, known as SAGE0536AGN, lies about 2 billion light-years from Earth and contains roughly 25 billion times the mass of the sun. Galaxies of this size typically harbor central black holes with the equivalent of 12 million solar masses or so, but SAGE0536AGN's is about 30 times that heavy, weighing in at 350 million solar masses, a new study reports.
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