This picture shows images of CMB taken from when it was first discovered to the present. Although it is quite constant ( at 2.7 degrees K) scientists have found that there are slight fluctuations in this temperature. This information suggests that the universe was quite "smooth" at its creation, meaning that with a few minor exceptions, most of matter was pretty much the same.
In the early 1920�s, the idea that the universe was growing larger was ludicrous. Although Albert Einstein�s Theory of Relativity actually supported this idea, he added the �Cosmological Concept� to his theory in order eliminate the apparent support for an expanding universe. Aleksandr Friedmann was the first to suggest that Einstein�s concept was true without the correction, but he was unable to prove this. Hubble was able to prove the accuracy of Einstein�s initial theory however, by observing distant galaxies and recording data that confirmed the notion that the farther a galaxy was from any point in the universe, the faster away it was moving from that point.
