I'm not sure if you're tailgating early or you just aren't up to speed. I'll start from the beginning:
1. The center of galaxies are typically occupied by supermassive black holes. I don't think there is any debate here. This is totally and completely unrelated to the topic I mentioned.
2. There is currently a working theory about a distant planet within the bounds of our solar system. It's existence would explain gravitational anomalies seen in the orbits of Pluto, Neptune, and your anus. It has been dubbed planet 9.
3. Math suggests the possibility that planet 9 may actually be a black hole, and not a planet.
The above three things are all facts but you obviously have an issue with one or more. Which? Why?