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B Did stars form this late

  1. Sep 5, 2016 #1


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    September 2, 2016
    European Space Agency (ESA)
    ESA's Planck satellite has revealed that the first stars in the Universe started forming later than previous observations of the Cosmic Microwave Background indicated. This new analysis also shows that these stars were the only sources needed to account for reionising atoms in the cosmos, having completed half of this process when the Universe had reached an age of 700 million years.
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  3. Sep 5, 2016 #2


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    The link you provide is a lecture on inflation
  4. Sep 6, 2016 #3


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  5. Sep 6, 2016 #4
    That conflicts with their earlier finding:
    Since stars are a fundamental component of galaxies, that would mean stars would have had to form earlier than 400 million years after the Big Bang. It would also mean that the reionization era ended approximately 550 million years after the Big Bang.
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