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Line 15: * the [[accelerating expansion of the universe]] observed in the light from distant [[Galaxy\|galaxies]] and [[supernova]]e. The model assumes that [[general relativity]] is the correct theory of gravity on cosmological scales. It emerged in the late 1990s as a '''concordance cosmology''', after a period ~~of time~~ when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe. The ΛCDM model has been successful in modeling broad collection of astronomical observations over decades. Remaining issues challenge the assumptions of the ΛCDM model and have led to many alternative models.<ref name="Snowmass21"/>

Lambda-CDM model: Difference between revisions