Planck mass
E180027
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Planck mass canonical | 10 |
How this entity was disambiguated
This entity first appeared as the object of triple T1564820 — 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 mass Context triple: [Planck time, relatedTo, Planck mass]
-
A.
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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B.
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.
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C.
Planck units
Planck units are a system of natural units in physics where fundamental constants like the speed of light, gravitational constant, and Planck constant are normalized to 1, providing a scale-free framework for describing physical laws.
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D.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
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E.
Planck time
Planck time is the fundamental unit of time in the system of Planck units, representing the shortest meaningful interval of time according to current physical theories, where quantum effects of gravity 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 mass Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
Planck units
Planck units are a system of natural units in physics where fundamental constants like the speed of light, gravitational constant, and Planck constant are normalized to 1, providing a scale-free framework for describing physical laws.
-
D.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
-
E.
Planck time
Planck time is the fundamental unit of time in the system of Planck units, representing the shortest meaningful interval of time according to current physical theories, where quantum effects of gravity become significant.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Planck unit
ⓘ
mass unit ⓘ physical constant ⓘ |
| appearsIn | natural units systems ⓘ |
| definedBy | Max Planck ⓘ |
| dependsOnConstant |
Newtonian gravitational constant G
ⓘ
surface form:
Newtonian gravitational constant
reduced Planck constant ⓘ speed of light in vacuum ⓘ |
| dimension | mass ⓘ |
| greaterThan |
electron mass
ⓘ
proton mass ⓘ |
| hasApproximateValue |
2.176434×10^-8 kg
ⓘ
2.176×10^-8 kg ⓘ |
| hasApproximateValueInEnergy |
1.22089×10^19 GeV/c^2
ⓘ
1.22×10^19 GeV/c^2 ⓘ |
| hasUncertainty | ±0.000024×10^-8 kg ⓘ |
| introducedInContext |
Planck units
ⓘ
gravitation ⓘ quantum theory ⓘ |
| isFundamentalScaleFor |
Planck energy
ⓘ
Planck length ⓘ Planck time ⓘ |
| isNaturalUnit | true ⓘ |
| isReferenceScaleFor |
black hole physics
ⓘ
early universe cosmology ⓘ effective field theories of gravity ⓘ |
| mathematicalDefinition | m_P = sqrt(ħ c / G) ⓘ |
| namedAfter | Max Planck ⓘ |
| orderOfMagnitude | 10^-8 kilograms ⓘ |
| orderOfMagnitudeInEnergy | 10^19 GeV ⓘ |
| partOf |
Planck units
ⓘ
surface form:
Planck units system
|
| physicalSignificance |
characteristic mass scale of quantum gravity
ⓘ
mass scale where quantum gravitational effects become important ⓘ |
| relatedTo |
Planck energy
ⓘ
Planck length ⓘ Planck temperature ⓘ Planck time ⓘ |
| SIUnit | kilogram ⓘ |
| symbol |
m_P
ⓘ
m_Pl ⓘ |
| usedIn |
cosmology
ⓘ
high-energy physics ⓘ quantum gravity ⓘ string theory ⓘ theoretical physics ⓘ |
| usesConstantSymbol |
G
ⓘ
c ⓘ ħ ⓘ |
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 mass Description of subject: 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.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.