Chris Impey is University Distinguished Professor at the University of Arizona. His research interests center in observational cosmology, gravitational lensing, and the evolution and structure of galaxies. He is a past Vice President of the American Astronomical Society and has served on its Executive Council and its Astronomy Education Board. His web design and curriculum projects have been supported by both NASA and the National Science Foundation.
In the first half, tax change advocate Bill Spillane discussed the 'FairTax' alternative-- a flat retail tax that would replace income and payroll taxes, along with a rebate for those who can't afford it.
In the first half, former staff scientist at the Environmental Protection Agency, E.G. Vallianatos, talked about how he witnessed first hand the catastrophic collusion between the EPA and the chemical industry.
In the latter half, Deputy Head of the Department of Astronomy at the University of... More »
Astronomy Professor Chris Impey discussed the structure of galaxies, exoplanets, the Big Bang, and various other topics in astronomy and cosmology. Regarding the size of the universe, "the current view in the expanding Big Bang picture is that the distance to the edge...as well as we can measure, is about 40 billion light... More »