in the constellation Andromeda
30 million times the mass of the Sun
Diameter roughly equal to the orbit of Venus.
This image shows the entire Andromeda Galaxy at right, with a close-up of its nucleus from the orbiting Chandra X-Ray Observatory. The Chandra image shows sources that are very hot. The large yellow over just above the bright blue spot at the center of the Chandra image represents a disk of hot gas surrounding the black hole. [X-ray: NASA/CXC/SAO; Optical: M.Garcia, S.Murray, Palomar Sky Survey]
This document was last modified: October 21, 2005.