• November 25, 2010

    Episode 307: The Hot, Early Universe

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    The universe began with a hot explosion called the Big Bang. The aftermath of the Big Bang consisted mostly of radiation, but as things cooled, the elements hydrogen and helium formed. Hubble's new Cosmic Origins Spectrograph is giving us information about the early formation process, including the development of galaxies and the "re-ionization" of the universe.