Problem
Prior to Edwin Hubble's discovery of galaxies far beyond the extremes of the Milky Way, most astronomers and physicists believed that the universe was static and unchanging. Now nearly all cosmologists agree that the universe had a beginning and has been expanding ever since.
A. What does the Big Bang theory tell us about the beginning of the universe?
B. What evidence is there to support the Big Bang theory? Was there really a "bang"?
C. Has your understanding of the Big Bang changed since taking this course?
D. What are the possible fates of our universe, and what evidence do we need to confirm one over the others?