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  1. Sep 6, 2023 · In the Big Bounce theory, each cycle begins with a small, smooth universe that gradually expands, becomes clumpier and more warped over time, and eventually starts to collapse and smooth itself out before starting anew [source: Davis ]. For the Big Bounce idea to work, it has to find a way around the singularity theorems developed by British ...

  2. The initial singularity is a singularity predicted by some models of the Big Bang theory to have existed before the Big Bang. The instant immediately following the initial singularity is part of the Planck epoch, the earliest period of time in the history of our universe. Traditional models of our universe The traditional model of the Big Bang

    • What Is Ekpyrotic Theory?
    • What Happened Before The Big Bang?
    • Additional Resources

    The problem is that the physics that we use to understand the early universe (a wonderfully complicated mishmash of general relativityand high-energy particle physics) can take us only so far before breaking down. As we try to push deeper and deeper into the first moments of our cosmos, the math gets harder and harder to solve, all the way to the p...

    As cool as this sounds, early versions of the cyclic model had difficulty matching observations — which is a major deal when you're trying to do science and not just telling stories around the campfire. The main hurdle was agreeing with our observations of the cosmic microwave background, the fossil light leftover from when the universe was only 38...

    For a general overview of the Big Bang theory, check out "Your Place in the Universe" by Paul M. Sutter, which covers the history of the development of the theory alongside the history of the universe itself. The PBS Spacetime video series has a great video exploring the options for what may have caused the Big Bang. Another video, published by the...

    • 3 min
    • Paul Sutter
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  4. The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level.

  5. Aug 1, 2014 · The fluctuations before and after the big bang were not strongly related to each other. The universe before the big bang could have been fluctuating very differently than it did afterward, and ...

  6. Apr 17, 2019 · Before the bang. It's possible that before the Big Bang, the universe was an infinite stretch of an ultrahot, dense material, persisting in a steady state until, for some reason, the Big Bang ...

  7. Mar 31, 2022 · Prior to the Big Bang — yes, before the Big Bang — the universe underwent a breathtaking cosmic expansion, doubling in size at least 80 times in a fraction of a second. This rapid inflation, fueled by a mysterious form of energy that permeated empty space itself, left the universe desolate and cold.

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