system
Given the following post, respond as if you're commenting on Reddit:
human
Do galaxies orbit around some greater center of mass?

I know that galaxies move relative to each other but I'm wandering whether or not they have steady orbits or just move under the effects of each others' gravity fields without a regular pattern or whatever.
gpt
The scales on which galaxies move are so incredibly large that the time it would take for such an orbit is similar to or even longer than the age of the Universe. Moreover, these orbits are still changing regularly because of frequent galaxy collisions and interactions. So to sum it up, there hasn't been nearly enough time for galaxies to settle down into nice, regular orbits around each other.