Here is an xray image of the center of the Milky Way. It is an object called
Sgr A*.
Here is a story connected to that picture.
If you look at the wikipedia article about Sgr A* you will see lots more detail about what we know about the center of the galaxy.
However, I suspect from your posts above that you are confusing the term 'galaxy' with the term 'universe'. The current models do not have a center of the universe.