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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?
« on: 03/04/2024 20:45:25 »I had always thought " Conservation of Energy " as a Law is Unbreakable.It is only a law in an inertial frame. Newtonian physics has energy conservation. General relativity, and in particular, the ΛCDM model, does not.
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But when Space stretches, Energy seems to dissipate/dissolve.Objects in motion tend to slow down. Light loses energy, eventually fading to arbitrarily long wavelengths. These lead to energy loss.
But also Gravitational potentials goes up, and dark energy increases. Both of these are gains 'from nowhere' so to speak.
So indeed, one often sees denial of some theory because it violates energy conservation, but only if it violates energy conservation of a closed system in an inertial frame.
Bogie's ISU is kind of static 'inertial' space, so energy conservation should apply, and he can explain how little collections of non-matter (the crunches) can bang out big wads of new stuff.
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Is it still there?Total energy of the universe is undefined, and later it is still undefined, so it is probably not meaningful to ask if one infinity is the same as another.
At best we talk about density. Energy of a proper volume is probably always going down due to expansion. Energy of a fixed comoving volume is probably going up due to dark energy and such. Those are quite different ways to express energy density.
Say if Space starts to collapse, Energy concentrations would go up?Yes, all the things I mentioned would go the other way. Rocks would speed up in the absence of force. Light blue shifts. Dark energy and gravitational potential go down.
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