system
Given the following post, respond as if you're commenting on Reddit:
human
Do we have any idea what is there in the universe 13.7 billion light years away from us, today ?
gpt
We do. The farthest galaxy we have seen formed a few hundred million years after the big bang. The light then traveled 13 billion light years over to us and we see it today. As the light was traveling, the universe was expanding, that means that the galaxy was moving away from us as the light was moving towards us. That galaxy is now 30 billion light years away from us.

So we are pretty sure we know what the galaxy looks like within 30 billion light years of us. What about farther than that? Well, everywhere we look the universe looks just about the same. There are galaxies evenly distributed about the universe, in every direction (the universe is isotropic and homogeneous). Because of that we have no reason to believe that the universe is any different in the places that we haven't seen.