During a presentation of the TED November 2016, η Katie Bouman, researcher at the Event Horizon Telescope, He explained how we can draw the picture of a black hole. What is surprising is that he predicted that this would happen in a few years. And that's how it happened! On April 10, 2019 by Katie Bouman released the first images of a black hole in the center of the galaxy M87. Here he explains how the Event Horizon Telescope (EHT) and how to reconstruct an image from a telescope network.