system
Given the following post, respond as if you're commenting on Reddit:
human
Is the universe beyond what we can see unobservable because we don't have the technology to see that far, or because the light has not reached us yet?
gpt
The latter. Specifically, the "observable universe" refers to the portion of the universe from which light could have reached us in the amount of time that has passed since the Big Bang. Anything outside of that region is unobservable because no signal could have reached us so far.