Local Group barycenter
E549962
The Local Group barycenter is the common center of mass around which all the galaxies in the Local Group, including the Milky Way and Andromeda, gravitationally orbit.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Local Group barycenter canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T5844623 — 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: Local Group barycenter Context triple: [Phoenix Dwarf Galaxy, orbits, Local Group barycenter]
-
A.
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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B.
Galactic anticenter
The Galactic anticenter is the point in the sky directly opposite the center of the Milky Way, located in the outer region of our galaxy’s disk.
-
C.
Barnard's Galaxy
Barnard's Galaxy is a nearby irregular dwarf galaxy in the Local Group, notable for its low metallicity and active star formation.
-
D.
Coma Berenices Dwarf Galaxy
The Coma Berenices Dwarf Galaxy is a faint, ultra-low-luminosity dwarf spheroidal satellite galaxy located in the constellation Coma Berenices and gravitationally bound to the Milky Way.
-
E.
Oort constants
The Oort constants are two parameters in galactic astronomy that quantify the local rotational properties of the Milky Way near the Sun, particularly its differential rotation.
- 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: Local Group barycenter Target entity description: The Local Group barycenter is the common center of mass around which all the galaxies in the Local Group, including the Milky Way and Andromeda, gravitationally orbit.
-
A.
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.
-
B.
Galactic anticenter
The Galactic anticenter is the point in the sky directly opposite the center of the Milky Way, located in the outer region of our galaxy’s disk.
-
C.
Barnard's Galaxy
Barnard's Galaxy is a nearby irregular dwarf galaxy in the Local Group, notable for its low metallicity and active star formation.
-
D.
Coma Berenices Dwarf Galaxy
The Coma Berenices Dwarf Galaxy is a faint, ultra-low-luminosity dwarf spheroidal satellite galaxy located in the constellation Coma Berenices and gravitationally bound to the Milky Way.
-
E.
Oort constants
The Oort constants are two parameters in galactic astronomy that quantify the local rotational properties of the Milky Way near the Sun, particularly its differential rotation.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical object
ⓘ
barycenter ⓘ gravitational center of mass ⓘ |
| definedAs |
center of mass about which Local Group galaxies orbit
ⓘ
common center of mass of all matter in the Local Group ⓘ |
| differentFrom |
Galactic Center
ⓘ
linked to:
Milky Way center
Milky Way barycenter ⓘ
linked to:
Milky Way center
Solar System barycenter ⓘ |
| frameOfReferenceFor | relative motion of Local Group galaxies ⓘ |
| governedBy |
Newtonian gravity
ⓘ
linked to:
Newtonian celestial mechanics
conservation of momentum ⓘ |
| governsMotionOf |
Andromeda Galaxy
ⓘ
Local Group dwarf galaxies ⓘ Milky Way ⓘ Triangulum Galaxy ⓘ |
| hasApproximateLocation | on the line connecting the Milky Way and Andromeda ⓘ |
| hasMajorContributors |
Andromeda Galaxy
ⓘ
Local Group dark matter ⓘ Local Group dwarf galaxies ⓘ Milky Way ⓘ Triangulum Galaxy ⓘ |
| hasProperty |
dominated by Milky Way and Andromeda masses
ⓘ
influenced by dark matter halos of Local Group galaxies ⓘ located between Milky Way and Andromeda ⓘ moves as mass distribution in Local Group evolves ⓘ not fixed in space ⓘ position depends on Milky Way–Andromeda mass ratio ⓘ |
| hasUncertainty | exact position depends on uncertain galaxy and dark matter masses ⓘ |
| influencedBy |
large-scale structure gravitational field
ⓘ
mass of the Virgo Supercluster ⓘ tidal forces from nearby galaxy groups ⓘ |
| orbitsWith |
Andromeda Galaxy
ⓘ
Local Group satellite galaxies ⓘ
linked to:
Local Group dwarf galaxies
Milky Way ⓘ Triangulum Galaxy ⓘ |
| partOf | Local Group ⓘ |
| relatedTo |
Local Group mass distribution
ⓘ
Local Group potential well ⓘ Milky Way–Andromeda system ⓘ |
| temporalBehavior | position changes over cosmological timescales ⓘ |
| usedIn |
N-body simulations of Local Group
ⓘ
modeling dynamics of Local Group ⓘ reference frame definitions for Local Group dynamics ⓘ studies of Milky Way–Andromeda orbital parameters ⓘ |
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: Local Group barycenter Description of subject: The Local Group barycenter is the common center of mass around which all the galaxies in the Local Group, including the Milky Way and Andromeda, gravitationally orbit.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.