The strongest evidence for an expanding universe comes from the
cosmological redshift. A redshift is a change in the spectrum of light
as the distance between the source and the observer of the light
increases. Such a redshift has been seen in the spectrum of light from
distant stars. This means that the distance between those stars and the
Earth is increasing, indicating an expanding universe
May 11th, 2014
Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.