Supermassive black holes that weigh several billion times the mass of our sun are present at the centers of active galaxies. Astronomers observe them as bright galactic cores where the galaxy’s supermassive black hole devours matter from a violent whirlpool called accretion disk. Some of the matter is squeezed out into a powerful jet. This process makes the galactic core shine brightly across the entire electromagnetic spectrum.
Click here for original story, First detection of secondary supermassive black hole in a well-known binary system
Source: Phys.org