The Big Bang: Redshift and Hubble's Law

A description of cosmological redshift due to the expansion of the universe and how it is described by Hubble's Law. This provided the first direct evidence that the universe actually is expanding. We also address some of the common misconceptions associated with the idea of an expanding universe Let us know what you think of these videos by filling out our short survey at http://tinyurl.com/astronomy-pulsar. Thank you!