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The 48 pages that link to Cosmological constant, each with the reason it gives.

• General relativityRelated: It lets relativistic cosmology account for accelerated expansion.

• Albert EinsteinRelated: Einstein introduced it in a cosmological model and later rejected that use; it now appears in modern cosmology.

• Dark energyRelated: It is the simplest mathematical model for dark energy.

• Cosmic inflationCompared with: Unlike inflation, it describes the universe's present acceleration rather than a proposed early episode.

• Einstein field equationsBroader topic: It can be added to the equations and changes their large-scale cosmological solutions.

• Cosmological principleRelated: It changes expansion histories without breaking the assumed large-scale symmetries.

• Hubble constantCompared with: It can influence cosmic expansion but is not itself an expansion rate.

• Big BangRelated: It represents the leading model’s explanation for the observed acceleration of cosmic expansion.

• Lambda-CDM modelRelated: It represents the model’s Lambda component and drives accelerated expansion.

• CosmologyRelated: It began as a way to permit a static model and now represents dark energy in ΛCDM.

• Friedmann equationsRelated: It contributes a constant-density term that can accelerate cosmic expansion.

• Hubble's lawRelated: It helps determine how the expansion rate changes, rather than defining the law’s present slope.

• Large-scale structure of the universeRelated: Late-time acceleration slows the growth of large-scale structure.

• Georges LemaîtreRelated: Lemaître later connected this term with a universe expanding from a dense beginning.

• Zero-point energyCompared with: The enormous naive vacuum-energy estimate is distinct from the observed cosmological constant.

• Gravitational constantCompared with: Both appear in relativistic gravity, but only G controls matter-curvature coupling.

• Cosmological constant problemBroader topic: Its measured value captures the small gravitational effect at the heart of the mismatch.

• Stress–energy tensorRelated: It can be moved between the geometry and effective stress–energy descriptions.

• Scale factorCompared with: It can drive accelerated scale-factor growth but is a source of expansion, not a measure of size.

• Alexander FriedmannRelated: Including or excluding it changes the possible expansion histories of Friedmann-type models.

• Cosmic voidRelated: Accelerated expansion can enhance the late-time growth of cosmic voids.

• Hubble parameterCompared with: It influences the evolution of the Hubble parameter but is not itself an expansion rate.

• Accelerating expansion of the universeRelated: It is the simplest standard-model explanation for sustained cosmic acceleration.

• Fine-tuningBroader topic: Its observed value is central to debates about cosmic fine-tuning.

• Big RipCompared with: A constant density produces acceleration without the density growth needed for a Big Rip.

• Cosmological parametersCompared with: It is the simplest fixed model for the dark-energy density parameter.

• Heat death of the universeRelated: A true constant supports one influential version of the heat-death forecast.

• Modified gravityCompared with: It explains acceleration within general relativity, unlike modifications that change gravity itself.

• Bianchi identitiesRelated: A fixed cosmological constant leaves the geometric divergence constraint unchanged.

• Big CrunchRelated: A positive constant value would prevent recollapse in conventional cosmological models.

• Boltzmann brainRelated: Its value influences the fate and thermal behavior of universes where brain fluctuations are considered.

• Brian SchmidtRelated: It is the simplest mathematical representation of dark energy in the standard model.

• High-Z Supernova Search TeamRelated: It became the simplest explanation for the acceleration revealed by the team’s measurements.

• Saul PerlmutterRelated: It is the simplest leading explanation for the acceleration revealed by the supernova measurements.

• Supernova Cosmology ProjectRelated: It is the simplest theoretical explanation for the expansion acceleration the project measured.

• Vacuum energyRelated: It can represent vacuum energy’s gravitational effect on cosmic expansion.

• Static universeRelated: Einstein introduced it to balance gravity in his static cosmological model.

• De Sitter universeRelated: Its positive value drives the exponential expansion of a De Sitter universe.

• Allan SandageRelated: Sandage’s cosmological models considered how this term affects inferred cosmic ages and expansion history.

• Structure formationRelated: Its late-time dominance slows the growth of new large-scale structure.

• SupergravityRelated: Supergravity models confront the challenge of obtaining realistic vacuum energy.

• Chronology of the universeRelated: It is the simplest explanation for the acceleration observed in the universe’s recent era.

• Curved spacetimeRelated: It changes spacetime’s large-scale curvature even where ordinary matter is sparse.

• History of general relativityRelated: Einstein added it to construct a static cosmological model, and it later gained renewed significance.

• Inflationary epochCompared with: It illustrates how vacuum-like energy can accelerate expansion, though it does not by itself specify inflation’s end.

• Quantum vacuum stateRelated: It provides the gravitational description against which vacuum energy estimates are compared.

• Shape of the universeRelated: It affects expansion history, which cosmological observations use to infer geometry.

• Ultimate fate of the universeRelated: A constant value is the simplest model for the dark energy driving the currently favored forecast.