Observing a black hole so close could answer questions that might warp the rules of physics. On April 10, 2019, a black hole broke the internet. The first-ever image of a black hole—starring the supermassive black hole at the center of the galaxy Messier 87—was published by the Event Horizon Telescope (EHT). In an equally impressive follow-up, our own galaxy’s supermassive black hole (Sagittarius A*, sometimes shortened to Sag A*) would be imaged by EHT three years later. And stellar-mass black holes lack the massive accretion disks that made it possible to image the M87 black hole and Sag A*.