Radio waves from distant celestial objects arrive at different points on Earth at different times. For the Event Horizon Telescope to work, these waves must be matched wave-for-wave at each and every station. To accomplish this, the planet-sized telescope uses ultra-precise atomic clocks, which time stamp the data. Later, when the data are combined, astronomers can ensure that each observatory’s data align with the data from all the rest. GIF by the Nat Science Found
https://www.pbs.org/newshour/science/here-is-the-first-photo-of-a-black-hole
^^^ The Event Horizon Telescope released the first-ever image of a black hole, a historic moment shared by scientists spread around the world. They obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun.
