How does the presence of cosmic microwave background radiation support the big bang theory?
Check all that are true.
-It shows that here is a faint, leftover energy that is coming from all directions of the universe.
-It shows that the universe used to be smaller with a uniform temperature.
-It shows that the universe is coming back together and will collapse in a massive black hole.
-It shows that all matter and energy in the universe is accelerating.
