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Cosmic Microwave Background: I. Set 'Em Up

Given by: Dr. Joan Schmelz, Professor
Department of Physics
University of Memphis

October 17, 2007
4:00pm, Manning Hall 201

Abstract:

Modern cosmology tells us that the Universe began billions of years ago with a cosmic event called the Big Bang. The early Universe was a much different place � a vast sea of elementary particles with a temperature and density high enough that nuclear fusion could take place in the entire volume of space. How did this super smooth early Universe evolve into today's 'clumpy' configuration of planets, stars, and galaxies? Astronomers think they know the answer. It involves the Cosmic Microwave Background, a pervasive radio radiation discovered in the 1960s at Bell Labs. In 1989, NASA launched the Cosmic Background Explorer (COBE) satellite to study the details of this background radiation. COBE scientists, Smoot and Mather, found small-scale structure in the radio radiation and claimed that it was evidence for the 'clumpy' nature of the early Universe. Their discovery received worldwide headlines and was awarded the 2006 Nobel Prize in Physics. Is it possible that this small-scale structure has nothing to do with cosmology?  Come to the Physics Seminar this week and next week and discover the answer to this provocative question for yourself!

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