Earth–Moon barycenter
E821684
The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Earth–Moon barycenter canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9806605 — 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: Earth–Moon barycenter Context triple: [Earth–Moon system, hasBarycenter, Earth–Moon barycenter]
-
A.
Earth–Moon system
The Earth–Moon system is the gravitationally bound pair of our planet and its natural satellite, whose mutual interactions shape tides, eclipses, and the dynamical evolution of both bodies.
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B.
Solar System barycenter
The Solar System barycenter is the shifting common center of mass around which the Sun and all planets, comets, and other bodies in the Solar System collectively orbit.
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C.
Sun–Earth L1 Lagrange point
The Sun–Earth L1 Lagrange point is a gravitationally stable location between the Earth and the Sun where spacecraft can maintain a relatively fixed position with minimal fuel, ideal for continuous solar and space weather observations.
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D.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
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E.
the Sun and Moon
The Sun and Moon are the celestial lights of Tolkien’s legendarium that illuminate Middle-earth and Valinor after the destruction of the Two Trees.
- 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: Earth–Moon barycenter Target entity description: The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
-
A.
Earth–Moon system
The Earth–Moon system is the gravitationally bound pair of our planet and its natural satellite, whose mutual interactions shape tides, eclipses, and the dynamical evolution of both bodies.
-
B.
Solar System barycenter
The Solar System barycenter is the shifting common center of mass around which the Sun and all planets, comets, and other bodies in the Solar System collectively orbit.
-
C.
Sun–Earth L1 Lagrange point
The Sun–Earth L1 Lagrange point is a gravitationally stable location between the Earth and the Sun where spacecraft can maintain a relatively fixed position with minimal fuel, ideal for continuous solar and space weather observations.
-
D.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
-
E.
the Sun and Moon
The Sun and Moon are the celestial lights of Tolkien’s legendarium that illuminate Middle-earth and Valinor after the destruction of the Two Trees.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical concept
ⓘ
barycenter ⓘ center of mass ⓘ |
| affects |
Earth orientation modeling
ⓘ
lunar orbit modeling ⓘ |
| averageEarthMoonDistance_km | about 384400 ⓘ |
| category |
Astrodynamics
NERFINISHED
ⓘ
Celestial mechanics ⓘ Orbital mechanics ⓘ |
| coordinateSystemOriginFor | some Earth–Moon dynamical models ⓘ |
| definedBy | mutual gravitational interaction of Earth and Moon ⓘ |
| definedInFrame |
Newtonian mechanics
NERFINISHED
ⓘ
general relativity approximations ⓘ |
| distanceFromEarthCenter_fractionOfRadius | about 0.73 GENERATED ⓘ |
| distanceFromEarthCenter_km | about 4670 GENERATED ⓘ |
| distanceFromEarthSurface_km | about 1700 GENERATED ⓘ |
| distanceFromMoonCenter_fractionOfDistance | about 0.90 of average Earth–Moon distance GENERATED ⓘ |
| distanceFromMoonCenter_km | about 379000 GENERATED ⓘ |
| governedBy |
Newton’s law of gravitation
NERFINISHED
ⓘ
conservation of momentum ⓘ |
| gravitationallyBoundSystem | Earth–Moon NERFINISHED ⓘ |
| hasProperty |
moves slightly due to perturbations from Sun and planets
ⓘ
not fixed within Earth due to varying Earth–Moon distance ⓘ |
| hasSymbolicRepresentation | often denoted as Earth–Moon CM or EM barycenter ⓘ |
| isReferencePointFor |
barycentric dynamical time definitions (conceptually)
ⓘ
describing Earth and Moon orbits around each other ⓘ |
| liesCloserTo | Earth NERFINISHED ⓘ |
| liesOnLineBetween |
Earth center
ⓘ
Moon center ⓘ |
| locatedInside | Earth NERFINISHED ⓘ |
| massRatioEarthToMoon | about 81.3 to 1 ⓘ |
| orbits | solar system barycenter NERFINISHED ⓘ |
| orbitsWith |
Earth
NERFINISHED
ⓘ
Moon NERFINISHED ⓘ |
| orbitsWithPeriod |
about 27.3 days relative to stars
ⓘ
about 29.5 days relative to Sun ⓘ |
| partOf | Earth–Moon system NERFINISHED ⓘ |
| relatedTo |
center of mass
ⓘ
solar system barycenter NERFINISHED ⓘ |
| relevantFor |
Earth–Moon evolution models
ⓘ
tidal interaction studies ⓘ |
| usedIn |
celestial mechanics
ⓘ
ephemeris calculations ⓘ orbital dynamics ⓘ solar system barycentric coordinates ⓘ spacecraft navigation ⓘ |
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: Earth–Moon barycenter Description of subject: The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.