See: https://www.sciencenews.org/article/event-horizon-telescope-first-image-black-hole-questions
4x things we could learn?
Questions:
1,What does a black hole really look like?
2,Does general relativity hold up close to a black hole?
3,How do some black holes make jets?
4,Do stellar corpses called pulsars surround the Milky Way’s black hole?
Answers suggested by Quantum-FFF Theory:
1, mostly with a fermion disc
2, Yes.
3, By the Planck length polarization due to additional adjacent black holes. e.g. two Herbig Haro Black holes, as the dual jet connection.
4, Yes, but only around the largest BHs such as central galaxy BHs. ( small BHs ( the pulsars) are eaten by larger BHs) BHs with the same mass will form Herbig Haro systems with star formation in the middle.
see also:
https://www.researchgate.net/publication/267759588_The_Proper_Motion_of_the_Galactic_Center_Pulsar_Relative_to_Sagittarius_A
In an interview with Newsweek following the 2017 observation period, Vincent Fish, a research scientist at MIT Haystack, said they hope to see the flow of material in and out of the black hole. “What we expect to see is an asymmetric image where you have a circular dark region. That’s the black hole shadow,” he said. “And there might be a bright ring at the edge of that—which is the photon ring [a spherical region of space where gravity is so strong photons are forced to travel in orbits]. Then around it you will see one side is bright and the other side is faint, so kind of like a crescent.”