eht
The Event Horizon Telescope (EHT) is an international collaboration that operates a global very long baseline interferometry array to image the immediate surroundings of supermassive black holes. By combining data from radio dishes around the world, the EHT achieves angular resolution sufficient to resolve event-horizon-scale structures at millimeter wavelengths, notably at 1.3 millimeters (230 GHz).
The project was developed in the early 2010s and links facilities across North America, South America, Europe,
Key results include the 2019 release of the first direct image of a black hole’s shadow, from
Methodologically, the EHT relies on very long baseline interferometry, combining signals from widely separated telescopes to
Future directions include expanding the network, increasing bandwidth and sensitivity, and observing additional targets and wavelengths,