Cosmology: Ehlers–Geren–Sachs theorem Jürgen Ehlers

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the inhomogeneities in temperature of cosmic background radiation recorded in image satellite probe wmap amount no more 10 kelvins.


the ehlers–geren–sachs theorem, published in 1968, shows in given universe, if freely falling observers measure cosmic background radiation have same properties in directions (that is, measure background radiation isotropic), universe isotropic , homogeneous friedmann–lemaître spacetime. cosmic isotropy , homogeneity important basis of modern standard model of cosmology.








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