Astronomy & Space Science · AST-667
Age, Geometry & Composition of the Universe: Structures & Vocabulary
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Structure
Structure of Age, Geometry & Composition of the Universe
The standard model contains ordinary matter, dark matter, radiation, neutrinos, and dark energy. Spatial curvature describes large-scale geometry, while expansion history determines how those components influence cosmic age and distance relations.
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- 01The Big Bang — SummaryOpen source ↗
OpenStax Astronomy 2e · Mar 9, 2022
View claim-by-claim traceability3 verified claims
Modern cosmology constrains the universe's age, large-scale geometry, and energy composition by combining expansion data, cosmic microwave background measurements, supernovae, clustering, and other probes.
supported · checked Sep 22, 2026Matter slows expansion gravitationally, radiation dominated earlier epochs, and dark energy drives late-time acceleration in the standard model.
supported · checked Sep 22, 2026CMB acoustic structure, baryon acoustic oscillations, supernova distances, primordial abundances, and large-scale clustering are mutually constraining.
supported · checked Sep 22, 2026