Professor, Department of Astronomy and Astrophysics
University of Chicago

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Cosmic Symphony

Wayne Hu and Martin White

Scientific American 290N2 44 (2004)

In the beginning, there was light. Under the intense conditions of the early universe, ionized matter gave off radiation that was trapped within it like light in a dense fog. But as the universe expanded and cooled, electrons and protons came together to form neutral atoms, and matter lost its ability to ensare light. Today, some 14 billion years later, the photons from that great release of radiation for the cosmic microwave background...

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