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Lepi Doptera
Sabine Hossenfelder
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Comments by "Lepi Doptera" (@lepidoptera9337) on "The “Worst Prediction” Was Never Made: The True Story of the Cosmological Constant" video.
A quantity that doesn't exist is what? Large? Compared to what?
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@Darisiabgal7573 A photon is a small amount of energy. Whether that amount of energy has rest mass or not depends on circumstances.
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@Darisiabgal7573 If CCC is true, then the rest mass of our em field is probably the next era equivalent of the current Planck scale. ;-) Personally I think the entire Planck scale concept is an overextrapolation, though. There is no there, there. It's just a misunderstanding of gravity.
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Yes. Absolutely everything is missing. Spacetime is completely empty.
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But in fact one can't do those approximations without errors, and that's how we know that we don't live in a flat plane. ;-)
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@philippenachtergal6077 Every geodetic measurement (i.e. actual folks running around with precise measuring sticks and optical instruments) and measuring distances and angles between two points on the surface of the planet) is, at the end of the day, a proof that we are living on a nearly spherical body. The geometry of Earth is not an abstract. It's a concrete sphere and two kids with cell phones who live far enough away can reliably measure its diameter today the same way the ancient Greeks did some 2300 years ago. All they have to do is to tell each other what the angle of the sun is at their locations. I don't know why people think that differential geometry is such a big deal. Yes, it has some highly difficult to prove global theorems, but at the local level it's just sticks and stones and angles that don't add up to 180 degrees in triangles.
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How did you come up with that nonsense? Did you make it up yourself?
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