From the June 2008 issue

Because the universe was smaller at earlier times, do we see larger volumes of it as we look back in time?

Ronal Hellman, Kerhonkson, New York
By | Published: June 1, 2008 | Last updated on May 18, 2023
Yes. If we observe a galaxy 5 billion light-years away, we see it at a time when things were much closer together.