Astronomers Spot Something "Totally Unexpected" at Event Horizon of Supermassive Black Hole

A supermassive black hole lurking at the center of M87, a supergiant galaxy 55 million light-years from Earth, is acting far more strangely than anticipated. Since 2017, astronomers from the Event Horizon Telescope (EHT) — an international collaboration combining a global network of radio telescopes — have closely watched the enormous gaping maw evolve, resulting in the first-ever images of a black hole ever taken. By comparing observations from 2017, 2018, and 2021, scientists made a surprising