Reacción a "Reactions to the first image of the supermassive black hole at the centre of the Milky Way galaxy"

It's exciting, I was expecting this three years ago. As always, when there is a big discovery there are a lot of questions to answer. One thing that surprises me is that, as we are positioned relative to the centre of the galaxy, we would expect to see the black hole gas disc perpendicular to us. Instead we see it tilted a little bit, and the reason for this tilt will have to be explained. 

Another thing I expected, and we haven't seen, is a movie of the billions of images captured as the stars rotate, in minutes, around the black hole. The researchers have chosen one set of images, the sharpest ones, but in reality there are many, many images.

It remains to be understood whether the black hole is rotating, and the orientation of that axis of rotation.