2 Monster Black Holes Spotted at Galaxy’s Heart
These two supermassive black holes are separated by less than 1 light-year and together harbor about 40 million times the mass of the sun, researchers said.
If it holds up, the find would be just the second known system of double supermassive black holes. The other, announced in 2006, is in a galaxy known as 0402+379, whose two giant black holes are separated by about 24 light-years and boast a combined 15 billion solar masses.
These two behemoths orbit their common center of mass about once every 100,000 years, the researchers said.