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Friedmann Cosmological Model with both Radiation and Matter

Abstract

THE discovery1 and investigation2,3 of the cosmic black-body radiation have opened the door to fairly reliable calculations of such evolutionary phenomena as the temperature–density history of the universe, primordial element formation4, expansion anisotropy5 and galaxy formation6. The isotropy of this radiation3,5 supports the current practice of idealizing the universe as spatially homogeneous and isotropic and as filled with pressureless matter and isotropic radiation.

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References

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JACOBS, K. Friedmann Cosmological Model with both Radiation and Matter. Nature 215, 1156–1157 (1967). https://doi.org/10.1038/2151156a0

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