View Full Version : X-rays Reveal a Stellar-Mass Black Hole in Andromeda

2012-Feb-23, 08:50 PM
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. (...)Read the [...]

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