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Supermassive black hole
NASA scientists are also exploring the possibility that a mysterious X-ray source in the red galaxy of Arp 147 may indicate the presence of a supermassive black hole. A supermassive black hole is the largest type of black hole found in a galaxy, possibly equivalent to hundreds of thousands times the mass of our Sun. Most galaxies are believed to contain supermassive black holes at their centers.
NASA's Hubble Space Telescope and the NASA Chandra X-ray Observatory have found a pair of colliding galaxies over 430 million light years from Earth
The composite image of Arp 147, a pair of interacting galaxies located about 430 million light-years from Earth, shows X-rays from the NASA's Chandra X-ray Observatory (pink) and optical data from the Hubble Space Telescope (red, green, blue) produced by the Space Telescope Science Institute (STScI) in Baltimore, Md.