NASA Animation Unveils Monstrous Scale of Universe's Biggest Black Holes

NASA has released an animation to show the scale of supermassive black holes, which can range from around 100,000 to tens of billions of solar masses. The animation includes black holes in dwarf galaxies, our own galaxy, and the largest known black hole, TON-618, which has a mass of 66 billion solar masses. The animation also highlights the mystery of how black holes get so big, with one theory being that they merge together when galaxies collide.