If the universe is 13 billion years old how do we have stars 45 billion light years from earth? Wouldn’t that light take 45 billion years to reach us?

Question

If the universe is 13 billion years old how do we have stars 45 billion light years from earth? Wouldn’t that light take 45 billion years to reach us?

In: Physics

Answer 1

Stars far away from us are moving away but the space in between is also expanding. There is a certain distance away where space is expanding such that the distance is increasing faster than the speed of light. There are things that are becoming invisible and will never be visible to us ever again.