Lemaître–Hubble law
E99201
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.
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.
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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.
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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.
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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 |
Lemaître–Hubble law
ⓘ
surface form:
Hubble–Lemaître law
Lemaître–Hubble law ⓘ
surface form:
Hubble’s 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 |
Lemaître–Hubble law
self-linksurface differs
ⓘ
surface form:
Hubble constant
cosmological distance ⓘ recessional velocity ⓘ |
| historicalPrecursor |
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
ⓘ
surface form:
Hubble’s 1929 velocity–distance relation
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 |
FLRW cosmological models
ⓘ
surface form:
Friedmann equations
FLRW cosmological models ⓘ
surface form:
Friedmann–Lemaître–Robertson–Walker metric
|
| 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
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Lemaître–Hubble law Description of subject: 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.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Hubble's law
this entity surface form:
Hubble's law
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble constant
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble’s law
this entity surface form:
Hubble constant
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble’s law
this entity surface form:
Hubble’s law
this entity surface form:
Hubble–Lemaître law
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
→
introducesConcept
→
Lemaître–Hubble law
ⓘ
this entity surface form:
Hubble–Lemaître law
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
→
relatedConcept
→
Lemaître–Hubble law
ⓘ
this entity surface form:
redshift–distance relation
this entity surface form:
Hubble–Lemaître law
this entity surface form:
Hubble–Lemaître law