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X-rays Reveal a Stellar-Mass Black Hole in Andromeda - Universe Today
[/caption] An ultraluminous x-ray source (ULX) previously spotted in the neighboring Andromeda galaxy by NASA’s Chandra observatory has now been revealed to be a stellar-mass black hole, according to researchers at the Max Planck Institute for Extraterrestrial Physics. The black hole was the first ULX seen in Andromeda, as well as the closest ever observed. Ultraluminous … Continue reading "X-rays Reveal a Stellar-Mass Black Hole in Andromeda"