Image Credit: NASA/CXC/SAO
Image Caption: “This X-ray image shows the central portion of the Andromeda Galaxy. The blue dot in the center of the image is an unusual “cool” million degree X-ray source of unknown nature. Just above this cool source is a source (yellow) that is thought to be due to X-rays from matter swirling toward a supermassive black hole in the nucleus of the galaxy. This black hole contains the mass of 30 million suns. Numerous other X-ray sources are also apparent. Most of these are probably due to X-ray binary systems, in which a neutron star or black hole is in a close orbit around a normal star.”
Chandra, the X-Ray Space Observatory, has been sending back some amazing pictures. Space.com has a great one here [defunct link] of a possible black hole discovered in the Andromeda galaxy.
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