Another thing not mentioned is all the stuff further away gets redshifted down into IR thanks to the universe expanding. So while the original output might have

Another thing not mentioned is all the stuff further away gets redshifted down into IR thanks to the universe expanding. So while the original output might have been in the visible part of the spectrum its wavelengths have now been stretched out to something your eye can no longer see. If you want to see all the cool shit 4 billion light years away, you are gonna have to get those retinal IR implants you keep asking for each Christmas installed.