Why does the observable universe have an "edge"?
A) Because there are so many galaxies in the universe that every line of sight eventually hits a galaxy,preventing us from seeing any farther
B) Because the density of neutrinos at the "edge" is so large that photons cannot pass through,preventing us from seeing beyond that point
C) Because absorbing matter prevents us from seeing past a certain distance
D) Because we cannot see any farther than the distance that light has traveled over the lifetime of the universe

Question

Quizplus · Accepted Answer

The observable universe has an "edge" because we cannot see any farther than the distance that light has traveled over the lifetime of the universe. This means that any objects farther away from us than this distance have not had enough time for their light to reach us yet, so we cannot observe them.

Why Does the Observable Universe Have an "Edge