Plasma cosmology

Plasma cosmology today is a non-standard cosmology whose central postulate is that the dynamics of ionized gases and plasmas play important, if not dominant, roles in the physics of the universe. In contrast, the current observations and models of cosmologists and astrophysicists explain the formation, development, and evolution of astronomical bodies and large-scale structures in the universe as influenced by gravity (including its formulation in Einstein's theory of general relativity) and so-called "baryonic physics".

Some theoretical concepts about plasma cosmology originated with Hannes Alfvén, who proposed the use of plasma scaling to extrapolate the results of laboratory experiments and plasma physics observations and scale them over many orders-of-magnitude up to the largest observable objects in the universe (see box).

When it was being developed, Plasma Cosmology was one of three competing theories in cosmology, the others being the Steady State theory and the Big Bang theory. Cosmologists and astrophysicists today who have evaluated plasma cosmology have rejected it because it does not match the observations of astrophysical phenomena as well as the current cosmological theory of the Big Bang. Few papers supporting plasma cosmology have appeared in the literature since the mid-2000s.

The term plasma universe is sometimes used as a synonym for plasma cosmology, alluding to plasma being the dominant state of the baryonic matter in the universe as well as being about plasma cosmology.

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