The universe is at least 156 billion light-years wide.
In the new study, researchers examined primordial radiation imprinted on the cosmos. Among their conclusions is that it is less likely that there is some crazy cosmic "hall of mirrors" that would cause one object to be visible in two locations. And theyve ruled out the idea that we could peer deep into space and time and see our own planet in its youth.
http://www.space.com/scienceastronomy/mystery_monday_040524.html
