It is known as the Great Annihilator: a mysterious region close to the center of the Milky Way galaxy that spews out bursts of high-energy gamma rays. A popular theory held that the Great Annihilator was actually a gigantic black hole, a million stars collapsed into a single object so dense that its gravity wouldn't let even light escape. New information gathered by the Very Large Array radio telescope in New Mexico and published in Nature has found that this theory is slightly off the mark. The Great Annihilator does indeed seem to be a black hole, but it's only as...
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