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What are the alternative theories of the big bang? 

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Alternative theories of the Big Bang include variations on the Standard Model, quasi-steady-state cosmology, plasma cosmology, hypersphere universe models, and static models. These alternative theories differ from the standard model in various aspects such as considerations on CP violation, inflation, number of neutrino species, quark-hadron phase transition, baryonic or non-baryonic dark matter, dark energy, nucleosynthesis scenarios, and large-scale structure formation scenarios. Some major variations include an inhomogeneous universe, Cold Big Bang, varying physical constants or gravity law, zero-active mass, Milne, and cyclical models. The most extreme alternative theories include non-cosmological redshift hypotheses like "tired-light" and other non-standard ideas. However, none of these alternative theories have reached the same level of development as the standard model in explaining cosmological observations.

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The paper discusses alternative models to the standard Big Bang theory, including the possibility of degenerate neutrinos, brane-world cosmology, and the inclusion of a decaying cosmological term.
The paper discusses various alternative explanations for the origin of the cosmic microwave background, including those proposed by Alfven, Hoyle, Narlikar, Rees, Ellis, Rowan-Robinson, Layzer, and Hively.
Reference EntryDOI
13 Mar 2019
1 Citations
The paper discusses various alternative theories to the standard hot big-bang model, including the idea of a static universe and the concept of a cyclically evolving universe.
The paper discusses various alternative cosmological theories, including variations on the Standard Model, quasi-steady-state cosmology, plasma cosmology, universe models as a hypersphere, and static models.
Open accessJournal ArticleDOI
8 Citations
The paper discusses various alternative cosmological theories to the standard Big Bang model, including variations on the Standard Model, quasi-steady-state cosmology, plasma cosmology, universe models as a hypersphere, static models, and tired-light hypotheses.

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