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The 46 pages that link to Cosmological principle, each with the reason it gives.

• Dark matterRelated: It underlies cosmological models that infer dark matter from the universe’s expansion and structure.

• Cosmic inflationRelated: Inflation offers a possible physical account of the large-scale uniformity this principle describes.

• Hubble constantNarrower topic: The expansion law and its single rate apply to large-scale cosmology under this assumption.

• Big BangRelated: It lets cosmological models describe the universe with large-scale averages rather than individual galaxies.

• Cosmic webCompared with: The web is locally lumpy, while the principle concerns averages across still larger scales.

• Cosmological redshiftRelated: It underlies the uniform expansion model used to interpret cosmological redshift.

• CosmologyRelated: It makes the universe-wide models described by cosmology mathematically tractable.

• Friedmann equationsRelated: It motivates the symmetries that reduce Einstein’s equations to this pair.

• Peculiar velocityRelated: It motivates treating large-scale expansion as a smooth background rather than individual motion.

• Observable universeRelated: It lets observations from our location support estimates of the universe’s large-scale structure.

• Hubble's lawNarrower topic: This large-scale symmetry makes a single expansion relation meaningful across the cosmos.

• Fred HoyleRelated: The steady-state proposal added an unchanging-cosmos condition beyond this spatial uniformity.

• Georges LemaîtreRelated: This simplifying assumption underlies the class of cosmological models Lemaître studied.

• Friedmann–Lemaître–Robertson–Walker metricRelated: It supplies the symmetry assumptions that single out the FLRW form.

• Giordano BrunoCompared with: Bruno’s removal of a privileged cosmic center anticipates a related idea, though not its modern scientific formulation.

• Cosmological argumentCompared with: It is a scientific model assumption, unlike the philosophical principle that existence needs explanation.

• Scale factorRelated: It motivates the symmetric cosmological models in which the scale factor is defined.

• Alexander FriedmannRelated: This large-scale symmetry makes Friedmann’s cosmological equations tractable.

• Cosmic voidRelated: It supplies the cosmic average against which void underdensities are judged.

• Age of the universeRelated: It lets cosmologists describe expansion with a single cosmic history.

• Great AttractorCompared with: The attractor is a local inhomogeneity within a universe that is homogeneous only on larger scales.

• Hubble flowNarrower topic: It motivates describing the large-scale expansion as a common flow rather than isolated motions.

• Laniakea SuperclusterCompared with: Laniakea's local structure shows strong unevenness without contradicting large-scale cosmic uniformity.

• Principle of Sufficient ReasonCompared with: Despite the similar name, it is a physical assumption, not a rule requiring explanations.

• Mach's principleRelated: Machian arguments often invoke large-scale cosmic matter, whose distribution this principle idealizes.

• Particle horizonRelated: Horizon limits raise the question of how distant regions acquired similar large-scale conditions.

• Gravitationally bound systemCompared with: Large-scale uniformity contrasts with the localized clumping that forms bound structures.

• Horizon problemNarrower topic: The horizon problem asks how large-scale uniformity arose despite limited causal contact.

• Flatness problemRelated: It lets cosmology describe space with a single global curvature parameter.

• Local VoidRelated: The Local Void illustrates why large local underdensities can coexist with large-scale uniformity.

• Hubble Ultra-Deep FieldRelated: Deep-field comparisons test whether galaxy populations differ substantially between sky regions.

• Nicholas of CusaRelated: It offers a later framework for comparing Cusa's decentered cosmos with modern cosmology.

• Universe (cosmology)Related: It makes the universe’s global geometry tractable despite its lumpy local structure.

• BOSS Great WallRelated: An exceptionally large structure raises questions about the scale at which cosmic uniformity applies.

• Physical cosmologyRelated: It lets cosmologists model the universe with a small set of averaged quantities.

• Huge-LQGRelated: Huge-LQG's reported size was discussed as a possible challenge to this assumption.

• Large quasar groupCompared with: An exceptionally large group raises questions about how quickly this statistical description applies.

• Observational cosmologyRelated: It lets observations from our location support models of the universe as a whole.

• Tired lightRelated: Any alternative cosmology must explain observations interpreted using this large-scale symmetry.

• Heinrich Wilhelm Matthias OlbersRelated: A spatially uniform distribution of stars is one assumption behind the classical paradox.

• Hubble volumeRelated: It helps make a spherical cosmic region a meaningful large-scale comparison.

• Local HoleCompared with: A local deficit can coexist with this principle if it averages out on larger scales.

• Recessional velocityRelated: It underlies interpreting recession as a general property of cosmic expansion rather than a central-point motion.

• Shape of the universeRelated: It reduces possible cosmic geometries to highly symmetric cases.

• South Pole WallCompared with: The wall prompts scrutiny of how large a structure can be before challenging statistical uniformity.

• Timeline of cosmological theoriesRelated: It makes the universe-wide models in this timeline mathematically tractable.