Background 6

It was not until Edwin Hubble came to the scene that things began to change. He worked at a telescope that looked at the red shift of stars. (let me explain, when light moves away from you the frequency of it shifts so you see it at more red and if it is going towards you then the light will look more blue. Here’s a picture.) anyway, he cataloged the shift of a bunch of stars and found, to make a long story short, that the universe is expanding. Whoa!!!!!!! That means it’s changing. That just sent 400 years of assuming it was static down the drain, and it confirmed one of general relativity’s predictions. It was a phenomenal discovery and set into motion what we know as modern cosmology and astrophysics.