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    What is the cosmic microwave background? | Space

    • The universe began 13.8 billion years ago, and the CMB dates back to about 400,000 years after the Big Bang. That's because in the early stages of the universe when it was just one-hundred-millionth t… See more

    Who Discovered The Cosmic Microwave background?

    American cosmologist Ralph Apher first predicted the CMB in 1948, when he was doing work with Robert Herman and George Gamow, according to NASA. The team was d… See more

    Space.com
    What Does The Cosmic Microwave Background Tell Us?

    The CMB is useful to scientists because it helps us learn how the early universe was formed. It is at a uniform temperature with only small fluctuations visible with precise telescopes… See more

    Space.com
    Additional Reading

    If you would like to learn more about the cosmic microwave background and the Big Bang, check out this free course with the Open University. You can explore the strange "co… See more

    Space.com
    Cosmic Microwave Background Radiation (CMBR): A Simple Explanation
    Science ABC
    What is cosmic microwave background radiation (CMBR)?
    The Cosmic Microwave Background (CMB) or Cosmic Microwave Background Radiation (CMBR) is the residual thermal radiation from the Big Bang, the event that marks the beginning of the universe approximately 13.8 billion years ago. This faint glow is the oldest observable light.
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