One of the biggest conundrums facing astrophysicists is how the most massive black holes became so, well, massive. Now it seems we have a potential answer — these greedy behemoths may have gobbled down two courses of matter rather than just the one.
Supermassive black holes are thought to lurk in the centers of most galaxies. The supermassive black hole living in the core of the Milky Way — known to live in the radio source Sagittarius A*, or Sgr A* — is around four million times the mass of our sun. But that’s not the biggest, not by a long shot. … (Discovery)