Cosmic Inflation (Intro Astronomy module 14, lecture 7)

This is part of my complete intro Astronomy class. If you want to watch all the videos in the correct order, please visit my website at The Inflationary Epoch happened or something nearly exactly like it, happened when the universe was extremely young. During the Grand Unified Theory (GUT) Era, the universe became the nearly flat Cosmos we see today. In order to understand it, we have to bring in an incomplete theory: Quantum Gravity. Oddly enough, this epoch can be observed as effects of gravitational waves on CMB.