stars
Discovered the red shift.
Edwin Hubble
This energy was found in the form of microwaves and is coming at us from every point in the universe.
It was called
Relic Radiation
Space is actually expanding causing the galaxies to move with it.
BBT
The universe is finite and expanding all energy and space was once squeezed into a very small volume.
The rapid expansion theory
1929 discovered an eletromagnetic property called the red shift.
Edwin Hobble
Low frequency and high frequency
Doppler effect