This is the forty-second video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video covers the discovery of the beginning of the universe in the Big Bang, and the Cosmic Microwave Background.
From the video description:
Table of Contents:
- Distant Galaxies Show a Red Shift in Their Spectra 2:07
- The Universe is Expanding 2:51
- This Model is Called “The Big Bang” 5:12
- The Universe is Almost 14 Billion Years Old 11:43