system
Given the following post, respond as if you're commenting on Reddit:
human
Are galaxies moving and if yes, is there one "center" of the universe they orbit around?

I mean is there an object that is so dense that it affects all others things in their path?
gpt
Yes and no, respectively. Galaxies don't just sit there stationary - for the most part they're moving away from one another as the Universe expands, and then on top of that they have some additional motion as well. But they don't orbit around any common center. As far as we know there is no center of the Universe.