How does cosmic background radiation change the universe?

1 Answer
Dec 29, 2015

It doesn't


The cosmic background refers to noise left over from the big bang. Whenever radiation is discovered, particularly microwaves, an origin is looked for. But there are large reaches of the universe where astronomers find this radiation but cannot associate any star, group of stars or galaxy to it. It is thought that what we are hearing is the echos of long ago.