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Physics
Special and General Relativity
Cosmological Density Perturbation vs Homogeneity: Questions Answered
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[QUOTE="vanhees71, post: 6848155, member: 260864"] Hm, it's a bit hard to say from which epoch on in the table in [URL]https://en.wikipedia.org/wiki/Chronology_of_the_universe[/URL] one can say we are "confident of our model". I'm conservative and think we can only be starting to be "confident of our model", when we can observe at least the state of the observable matter, which are as far as we can be confident of "made of" the particles of the standard model, i.e., leptons, quarks, W- und Z-Bosons, gluons, and Higgs bosons. I'd say with some good will we can say we have observed and also measured some properties of the "quark gluon plasma" in relativistic heavy ion collisions, i.e., I'd say we can be optimistic to have understood the universe from what Wikipedia calls "the quark epoch" on. The electroweak epoch is already plagued by the question, what provides enough CP violation to explain the resulting/obseverd matter-over-antimatter dominance, but at least we have some idea about this phase transition. So maybe we can be a bit more optimistic and say we can be pretty confident on what happens close the end of "the electroweak epoch". What happened before, is imho still quite speculative, although the hypothesis of inflation seems to be quite convincing, but I'd not say it's also not something one can be really "confident" about. [/QUOTE]
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Physics
Special and General Relativity
Cosmological Density Perturbation vs Homogeneity: Questions Answered
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