![]() For several decades, the scientific community was divided between supporters of the Big Bang and the rival steady-state model which both offered explanations for the observed expansion, but the steady-state model stipulated an eternal universe in contrast to the Big Bang's finite age. In 1964, the CMB was discovered, which convinced many cosmologists that the steady-state theory was falsified, since, unlike the steady-state theory, the hot Big Bang predicted a uniform background radiation throughout the universe caused by the high temperatures and densities in the distant past. 4.1 Hubble's law and the expansion of space.Ī wide range of empirical evidence strongly favors the Big Bang, which is now essentially universally accepted.4.2 Cosmic microwave background radiation.4.4 Galactic evolution and distribution.5 Problems and related issues in physics.9 Religious and philosophical interpretations. ![]() ![]() The Big Bang theory offers a comprehensive explanation for a broad range of observed phenomena, including the abundances of the light elements, the CMB, large-scale structure, and Hubble's law. The theory depends on two major assumptions: the universality of physical laws and the cosmological principle.
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