Planck density
E650603
Planck density is the extremely high theoretical mass density scale in physics derived from fundamental constants, representing the density at which quantum gravitational effects become dominant.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Planck density canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7229930 — 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: Planck density Context triple: [Planck units, hasBaseQuantity, Planck density]
-
A.
Planck mass
The Planck mass is a fundamental physical constant representing the mass scale at which quantum gravitational effects are expected to become significant, derived from combinations of the speed of light, Planck’s constant, and the gravitational constant.
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B.
Planck volume
The Planck volume is the extremely tiny three-dimensional space defined by the cube of the Planck length, often considered a fundamental quantum of volume in theoretical physics.
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C.
Planck length
The Planck length is the fundamental unit of length in quantum gravity, representing the scale at which classical concepts of space and time are expected to break down.
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D.
Planck scale
The Planck scale is the realm of extremely high energies and tiny distances where quantum effects of gravity are expected to dominate and classical concepts of space-time break down.
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E.
Planck energy
Planck energy is the fundamental energy scale in physics, derived from universal constants, at which quantum gravitational effects are expected to become significant.
- 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: Planck density Target entity description: Planck density is the extremely high theoretical mass density scale in physics derived from fundamental constants, representing the density at which quantum gravitational effects become dominant.
-
A.
Planck mass
The Planck mass is a fundamental physical constant representing the mass scale at which quantum gravitational effects are expected to become significant, derived from combinations of the speed of light, Planck’s constant, and the gravitational constant.
-
B.
Planck volume
The Planck volume is the extremely tiny three-dimensional space defined by the cube of the Planck length, often considered a fundamental quantum of volume in theoretical physics.
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C.
Planck length
The Planck length is the fundamental unit of length in quantum gravity, representing the scale at which classical concepts of space and time are expected to break down.
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D.
Planck scale
The Planck scale is the realm of extremely high energies and tiny distances where quantum effects of gravity are expected to dominate and classical concepts of space-time break down.
-
E.
Planck energy
Planck energy is the fundamental energy scale in physics, derived from universal constants, at which quantum gravitational effects are expected to become significant.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
physical constant
ⓘ
theoretical construct in physics ⓘ |
| approximateValue | 5.15500×10^96 kg·m^−3 ⓘ |
| approximateValueOrderOfMagnitude | 10^96 kg·m^−3 ⓘ |
| associatedEpoch |
Planck era of the universe
ⓘ
linked to:
Big Bang cosmology
|
| belongsToQuantityKind | mass density ⓘ |
| conceptualRole |
density scale where quantum gravitational effects become significant
ⓘ
natural density unit in Planck unit system ⓘ |
| definedBy |
Max Planck units system
ⓘ
linked to:
Planck units
|
| field |
cosmology
ⓘ
quantum gravity ⓘ theoretical physics ⓘ |
| hasDimension | mass per volume ⓘ |
| hasDimensionalFormula | M L^−3 ⓘ |
| hasSIUnit | kilogram per cubic metre ⓘ |
| hasSIUnitSymbol | kg·m^−3 ⓘ |
| isDefinedAs |
Planck mass divided by Planck length cubed
ⓘ
m_P / l_P^3 ⓘ |
| isDerivedFromConstant |
Boltzmann constant
ⓘ
Newtonian gravitational constant ⓘ
linked to:
Newtonian gravitational constant G
Planck constant ⓘ reduced Planck constant ⓘ speed of light in vacuum ⓘ |
| isDirectlyObservable | false ⓘ |
| isExtremelyHighComparedTo |
nuclear density
ⓘ
water density ⓘ |
| isPartOf | Planck scale ⓘ |
| isRelatedTo |
Planck energy
ⓘ
Planck energy density ⓘ Planck length ⓘ Planck mass ⓘ Planck temperature ⓘ Planck time ⓘ Planck units ⓘ |
| isRelevantFor |
black hole physics
ⓘ
singularity studies ⓘ |
| isSometimesExpressedIn | Planck mass per Planck volume ⓘ |
| isTheoretical | true ⓘ |
| isUpperScaleFor | classical general relativity applicability ⓘ |
| isUsedAs | reference scale for quantum gravity ⓘ |
| namedAfter | Max Planck ⓘ |
| symbol |
rho_P
ⓘ
ρ_P ⓘ |
| usedIn |
Planck epoch descriptions
ⓘ
early universe cosmology ⓘ quantum gravity models ⓘ |
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: Planck density Description of subject: Planck density is the extremely high theoretical mass density scale in physics derived from fundamental constants, representing the density at which quantum gravitational effects become dominant.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.