Black Hole

"Chandra X-ray Image with Scale Bar" - Image Credit: NASA/CXC/SAO
Chandra X-ray Image with Scale Bar
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. has a great one here [defunct link] of a possible black hole discovered in the Andromeda galaxy.