Mysterious Physics of a Black Hole

https://www.wired.com/story/new-snapshot-of-black-hole-reveals-its-mysterious-physics

“However, what was lacking was insight into the process behind the powerful twin jets produced by the black hole gobbling up matter, ejecting a portion of the material falling into it away at nearly light speed. (The black hole at the center of our Milky Way is less ravenous, i.e., relatively quiet, compared to M87’s black hole.) For example, astronomers don’t yet agree about how those jets get accelerated to such high speeds. These new results place additional constraints around the various competing theories, narrowing the possibilities.”