![]() One of the earliest was the Copernican Revolution, which established the heliocentric model of the Solar System. Several major cosmological disputes have occurred throughout the history of cosmology. ![]() Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Because the term depends on the prevailing consensus, the meaning of the term changes over time. The term non-standard is applied to any theory that does not conform to the scientific consensus. A non-standard cosmology is any physical cosmological model of the universe that was, or still is, proposed as an alternative to the then-current standard model of cosmology. ![]()
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