So I was just curious if anybody could answer this question for me. Do all galaxies have a central supermassive black hole? I only wonder this because obviously the black hole had to collapse from something, and I was wondering if that happens before or after it "accumulates the galaxy" around itself. I guess another way of asking this is if there are any galaxies that have an actual star at its center. I figured since black holes have the same gravity as the star that it came from (up until the event horizon), it should be possible for a star to have enough gravity to hold a galaxy stable.