system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a spot in the universe that light has not 
traveled to yet?

Despite the billions of stars/nebulas in our galaxy and perhaps trillions more in the entire universe, is there a place where the radiating light from these celestial bodies has yet to reach?

Hypothetically, if we could travel to this location and look around, what would we see? Darkness?
gpt
The best model we have of the Universe is that it's more or less the same everywhere, and that it extends far beyond the bits we can see, possibly infinitely so. This means that there's nothing special about where we live as opposed to any other part of the Universe. The Big Bang didn't originate from a point, it happened everywhere because it wasn't an expansion *in* space, it was an expansion *of* space. So even the regions so distant that we don't see them do receive light from other parts of the Universe, just not from our part.

Now, if the question is whether there's a spot in the Universe where the light from things like our galaxy hasn't reached then the answer is a definite yes! Light's only had a finite amount of time to travel since the Big Bang, and to our best estimate it's travelled about 46 billion light years in that time. Past that distance, no one has seen the Milky Way or has any idea we exist, and vice versa we have never received light from those regions either!

EDIT: I've got about two new responses every minute asking why the radius of the observable Universe can be 46 billion light years if the Universe is only 13.7 billion years old. I've addressed it a couple of times down in the comments, but the short answer is that since the Universe is expanding, the distance that light has travelled is larger now than it was while the light was travelling it.