Lemaître–Hubble law

E99201

cosmological law empirical relation physical law

The Lemaître–Hubble law is the fundamental cosmological relation that expresses the proportionality between a galaxy’s recessional velocity and its distance, providing the first observational evidence for the expansion of the universe.

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All labels observed (6)

Label	Occurrences
Hubble–Lemaître law	9
Hubble’s law	3
Hubble constant	2
Hubble's law	2
Lemaître–Hubble law canonical	1
redshift–distance relation	1

How this entity was disambiguated

This entity first appeared as the object of triple T854131 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Lemaître–Hubble law
Context triple: [Georges Lemaître, knownFor, Lemaître–Hubble law]

A. FLRW cosmological models
FLRW cosmological models are a family of solutions to Einstein’s field equations that describe a homogeneous and isotropic expanding or contracting universe, forming the standard framework for modern cosmology.
B. Big Bang cosmology
Big Bang cosmology is the prevailing scientific framework that explains the origin, early evolution, and large-scale structure of the universe as emerging from an extremely hot, dense initial state that has been expanding over time.
C. Schwarzschild–Milne equations
The Schwarzschild–Milne equations are fundamental integro-differential equations in radiative transfer theory that describe the propagation and scattering of radiation through a plane-parallel, absorbing and emitting medium.
D. Kasner
Kasner is the birth surname of former German chancellor Angela Merkel, reflecting her family name before marriage.
E. Formula of Universal Law
The Formula of Universal Law is Kant’s central moral principle that requires one to act only on maxims that can be consistently willed as universal laws for everyone.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Lemaître–Hubble law
Target entity description: The Lemaître–Hubble law is the fundamental cosmological relation that expresses the proportionality between a galaxy’s recessional velocity and its distance, providing the first observational evidence for the expansion of the universe.

A. FLRW cosmological models
FLRW cosmological models are a family of solutions to Einstein’s field equations that describe a homogeneous and isotropic expanding or contracting universe, forming the standard framework for modern cosmology.
B. Big Bang cosmology
Big Bang cosmology is the prevailing scientific framework that explains the origin, early evolution, and large-scale structure of the universe as emerging from an extremely hot, dense initial state that has been expanding over time.
C. Schwarzschild–Milne equations
The Schwarzschild–Milne equations are fundamental integro-differential equations in radiative transfer theory that describe the propagation and scattering of radiation through a plane-parallel, absorbing and emitting medium.
D. Kasner
Kasner is the birth surname of former German chancellor Angela Merkel, reflecting her family name before marriage.
E. Formula of Universal Law
The Formula of Universal Law is Kant’s central moral principle that requires one to act only on maxims that can be consistently willed as universal laws for everyone.
F. None of above. chosen

Statements (42)

Predicate	Object
instanceOf	cosmological law ⓘ empirical relation ⓘ physical law ⓘ
alsoKnownAs	Hubble–Lemaître law ⓘ linked to: Lemaître–Hubble law Hubble’s law ⓘ linked to: Lemaître–Hubble law
appliesTo	extragalactic nebulae ⓘ galaxies ⓘ
assumes	cosmological principle ⓘ
category	laws of astronomy ⓘ observational cosmology ⓘ
contradicts	static universe models ⓘ
describes	expansion of the universe ⓘ proportionality between recessional velocity and distance of galaxies ⓘ
expressedAs	v = H₀ d ⓘ
field	astrophysics ⓘ cosmology ⓘ physical cosmology ⓘ
hasConsequence	no unique center of expansion in the universe ⓘ space itself is expanding ⓘ
hasParameter	Hubble constant H₀ ⓘ
hasQuantity	Hubble constant ⓘ linked to: Lemaître–Hubble law cosmological distance ⓘ recessional velocity ⓘ
historicalPrecursor	Hubble’s 1929 velocity–distance relation ⓘ linked to: A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae Lemaître’s 1927 paper on expanding universe ⓘ
implies	more distant galaxies recede faster ⓘ
influenced	acceptance of Big Bang theory over steady‑state theory ⓘ
isApproximationOf	general relativistic expansion dynamics ⓘ
mathematicalForm	linear relation between velocity and distance ⓘ
namedAfter	Edwin Hubble ⓘ Georges Lemaître ⓘ
observationalBasis	distance indicators such as Cepheid variables ⓘ redshift measurements of galaxies ⓘ
providesEvidenceFor	Big Bang cosmology ⓘ non‑static universe ⓘ
relatedTo	Friedmann equations ⓘ linked to: FLRW cosmological models Friedmann–Lemaître–Robertson–Walker metric ⓘ linked to: FLRW cosmological models
scaleDependence	Hubble constant may vary with cosmological model and epoch ⓘ
usedFor	determining cosmological parameters ⓘ estimating the age of the universe ⓘ
validRegime	homogeneous and isotropic universe approximation ⓘ large cosmological scales ⓘ

How these facts were elicited