In the constellation Ursa Major
Approximately 1,000 times the mass of the Sun
Diameter equal to the size of Mars
X-ray views from Chandra X-Ray Observatory show a flare-up from the possible black hole. The black hole is just to the right of the green cross, which marks the galaxy's center. It is much brighter in the second view than the first. [NASA/SAO/CXC]
This document was last modified: August 29, 2011.