Event Horizon Telescope: Capturing the First Images of Black Holes

The Event Horizon Telescope (EHT) is a planet-scale array of radio telescopes that works together to capture images of black holes. By linking observatories across the globe using a technique called very-long-baseline interferometry, the EHT achieved the first-ever direct image of a black hole in 2019 and the Milky Way's own supermassive black hole in 2022. This article explains how the EHT works, its major discoveries, and why its images are transforming our understanding of gravity and the universe.