New data obtained by X-ray Observatory Chandra and XMM-Newton, confirm that there are two medium-size black hole in our neighboring galaxy. These holes, so far managed to avoid falling into the galaxy center. They can be example of the "seeds" from which are formed supermassive black holes in galactic centers, including the Milky Way. For several decades, scientists have strong evidence for the existence of two different classes of black holes, holes with a mass of magnitude, about 10 solar masses of supermassive located in the centers of galaxies, whose mass varies from hundreds of thousands and up to billions of solar masses. But is there a black hole intermediate-mass? The mystery still remains unsolved.

Evidence for the existence of these objects was controversial, and there was no convincing arguments that there are intermediate black holes in the galaxy. Recently, a group researchers found in X-ray data, the signature of medium-mass black holes in the galaxy M82, located 12 million light miles away from Earth. "This is the first discovery of two black holes, the average weight in one galaxy, "says Hua Feng of Tsinghua University in China. Scientists led two papers describing the results of the study. "Their location near the center of the galaxy may contain information about the origin of large, supermassive black holes at the centers of galaxies. " One possible mechanism for the formation of supermassive black holes, suggest a chain reaction of collisions of stars in compact star clusters that leads to the accumulation of very massive stars that are in the process of decay, forming a black hole intermediate-mass.