Is the observable universe is the same size today as it was a few million years ago?
1 Answer
Apr 15, 2016
No
Explanation:
Keep in mind the word "observable" means what we could in theory see, that is things that were close enough from light to have left those locations and arrived at the Earth. Since the universe is 13.8 billion years old (aprox) then theoretically only things within 13.8 billion light years would be close enough for us to "see" them. That means that a few million years ago the observable universe was a few million light years smaller.
