system
Given the following post, respond as if you're commenting on Reddit:
human
Why can we still see the cosmic microwave background radiation? If it travels at the speed of light shouldn't that radiation have already passed us and that part of the sky be dark now?
gpt
The Big Bang didn't happen at a place, it happened everywhere uniformly in a - as far as we know - infinite universe. For any CMB light just hitting us from a certain corner of the sky, there'll be more arriving in the next second originating from a place along the same direction just one lightsecond farther away and so on.