Supermassive Black Holes Are Trillions Of Times Bigger Than Earth

Lurking at the center of the Milky Way galaxy is the supermassive black hole Sagittarius A*, a monstrous clump of matter so dense that the pull of its gravity overpowers anything that comes near it, including light itself. But it's hard to grasp just how big a supermassive black hole is because there is nothing much out there to match it. Here are some things that might put it into perspective.