EXI-Event Horizon Imager to observe black holes
It's called Event Horizon Imager and it's the new frontier of the observation of black holes: a network of radio telescopes in orbit around the Earth that will allow to reach angular resolutions five times higher than those obtained by the Event Horizon Telescope. The idea is of researchers from Radboud University who, together with ESA and researchers involved in Eht, have already tested technological feasibility and simulated future observations.
There are many advantages in using satellites instead of radio telescopes on Earth, as with the Event Horizon Telescope (Eht). Thanks, the frequencies from the Earth are filtered by the atmosphere, and even the distances between the telescopes in space are greater, allowing us to take a big step forward and get images with a resolution more than five times better than the one that can be achieved with the terrestrial radio telescopes.
The idea is that satellites will initially function independently of Eht ground-based telescopes but a hybrid system is also being considered, with orbiting telescopes combined with those on Earth. Using a hybrid system like this could provide the ability to create moving images of a black hole, and you might be able to observe other, weaker sources as well.
https://www.media.inaf.it/2019/05/13/vlbi-spazio-foto-buchi-neri/