TON 618 is an ultramassive black hole powering a distant quasar. It contains about 40 to 66 billion times the Sun's mass. The image compares its event horizon with our Solar System, showing how enormous it is. Nothing crossing the event horizon can escape gravity, not even light. Size estimates come from gas motion around the quasar. Sources: NASA and The Astrophysical Journal. Want more interesting content like this ? Follow gravitonomy :) #nasa #ton618 #science #space #blackholes