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Apprehensive-Sea888 t1_ixu8pnu wrote

Check out a YouTube by FermiLab (I think). The video walks back time from now until some known point, if I remember, 10 to the 14th fraction of a second after the Big Bang. The thing I found interesting is that for the first few hundred thousand years the universe was a large mass of plasma expanding and cooling. No atomic particles existed. The background radiation left over is what we can still detect and measure / map time. Great vid. Probably 20 minutes. Well worth the time.

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zambabamba OP t1_ixua0ez wrote

Thanks. Am having a watch of https://www.youtube.com/watch?v=dr6nNvw55C4 now at your suggestion :)

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ChrisARippel t1_ixulse1 wrote

I like Don Lincoln videos.

I get several things from this video.

  • Astronomers can see the CMB, visible 380,000 years after the Big Bang.

  • Explanations of the early universe from 380,000 years ago to 10-13 seconds after the Big Bang are based on observations in particle accelerators creating the hot, energetic conditions of the early universe. My point is that these explanations of the time before what astronomers can observe with telescopes are NOT only mathematics as some appear to claim.

  • Explanations from 10-13 to 10-43 seconds after the Big Bang are mathematics based on known laws of physics.

  • Known laws of physics break down at 10-43 seconds after the Big Bang. Descriptions of the universe before 10-43 are only speculation which at best don't contradict known observations, physics and mathematics.

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