# Is the age of the universe different for different people located at different points in the Universe? [duplicate]

From Earth we say that the age of the universe is 14.5 billion years ago because that is how far we are able to see. But since we are probably not the center of the universe, wouldn't some one many billion light years away from us feel that the age of the universe is different ?

If so, how is it possible that the age of the universe varies by distance ?

This question came to my mind whilst watching tis video https://www.youtube.com/watch?v=mGBm5Ywjd5o [about the 8:30 mark till 12 mins]

## marked as duplicate by John Rennie, JamalS, Jim, Martin, ACuriousMind♦Feb 23 '15 at 21:47

• That is not the reason we say it's 14.5 billion years old. The age is the same everywhere. – lemon Feb 23 '15 at 13:07
• What is the actual reason? – Chani Feb 23 '15 at 13:09
• "Since we are probably not the center of the universe..." Actually, because the universe is infinite (as far as we can tell) it is meaningless to designate a center of the universe. – Sean Feb 23 '15 at 13:10
• @sean I thought we say the universe is infinite because it appears so from our point of view ie we haven't seen the end of the universe - however are there any theories that say the universe has to be infinite? And if one says that the universe is actually infinite, doesn't the concept of expanding universe become a little hard to digest? What does an already infinite expanding entity expand into? – Chani Feb 23 '15 at 13:14
• An expanding Universe doesn't need anything to expand into, no matter if it's finite or infinite. The reason we think its infinite is that its (in)finiteness is connected to its average density <ρ>; if <ρ> is above a certain threshold, then its "only" finite. However, observationally it is found that to a high precision, <ρ> is exactly equal to the critical value. Also, even a finite universe doesn't have a center, just as the finite 2D surface area of a ball doesn't have one. If the surface were populated by ants, they could all (rightfully) claim to be at the center. – pela Feb 23 '15 at 15:34