How does a black hole get to the center of a galaxy?
The black hole created by a single star’s death is called a stellar-mass black hole. These black holes have masses about two to 100 times that of the Sun. When a star explodes to create a stellar-mass black hole, it might give itself a little “kick” and start flying through space, but this kick is random and could send it inward, outward, or in any direction in 3D. So, these black holes don’t tend to end up in a galaxy’s center unless the star that created them happened to be there.