/sci/ - Science & Math

Very cool. I find black holes incredibly fascinating, but why have they focused their effort on taking a picture of a black hole thats so far away?
Is it simply a matter of size and that M87 was the easiest to picture, or is there another reason? Surely we've got plenty of local black holes but they're probably not massive enough to be pictured, I'd imagine. I'm guessing Sag A would be hard to picture with the entire Milky Way blocking the view.
Does this confirm that every galaxy has a supermassive black hole as its center?