The cosmic microwave background or CMB is my second feature for this series. The CMB is formed by the original photons produced in the Big Bang and was created at the last scattering surface.
The Universe began 13.8 billion years ago in an event called the Big Bang. Throughout its ages the universe has changed a lot, sometimes dramatically, so to appreciate these changes I’m going to discuss the History of the Universe in 10 Features. My first feature