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An optical photo of the galaxy NGC 1365. This galaxy has a massive black hole at its center, and SAO astronomers have used the Chandra X-ray Observatory to measure the size of the hot, X-ray emitting source around this black hole, which is only about twice the size of our solar system.
Credit: Photo courtesy of Alan Chen
Low Resolution Image (jpg)
Credit: Photo courtesy of Alan Chen
Low Resolution Image (jpg)
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