Galactic rotation
E471606
Galactic rotation is the large-scale orbital motion of stars and gas around the center of a galaxy, revealing its mass distribution and the presence of dark matter.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Galactic rotation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4814326 — 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: Galactic rotation Context triple: [Jan Oort, knownFor, Galactic rotation]
-
A.
Schwarzschild method in galactic dynamics
The Schwarzschild method in galactic dynamics is a numerical orbit-superposition technique used to construct self-consistent models of galaxies and infer their mass distributions, including dark matter and central black holes.
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B.
The Motion of Stars
The Motion of Stars is a 1910 silent short film directed by D.W. Griffith that explores astronomical themes through early cinematic techniques.
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C.
Galactic thin disk
The Galactic thin disk is the relatively flat, rotating component of the Milky Way where most of its young to middle-aged stars, gas, and spiral arms are concentrated.
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D.
Milky Way stellar halo
The Milky Way stellar halo is a vast, diffuse, roughly spherical population of old, metal-poor stars and dark matter that surrounds the Milky Way’s disk and bulge, extending far into its outer regions.
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E.
Gould Belt
The Gould Belt is a nearby, partial ring of young stars, gas, and star-forming regions tilted to the Milky Way’s plane and encompassing many of the bright constellations visible from Earth.
- 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: Galactic rotation Target entity description: Galactic rotation is the large-scale orbital motion of stars and gas around the center of a galaxy, revealing its mass distribution and the presence of dark matter.
-
A.
Schwarzschild method in galactic dynamics
The Schwarzschild method in galactic dynamics is a numerical orbit-superposition technique used to construct self-consistent models of galaxies and infer their mass distributions, including dark matter and central black holes.
-
B.
The Motion of Stars
The Motion of Stars is a 1910 silent short film directed by D.W. Griffith that explores astronomical themes through early cinematic techniques.
-
C.
Galactic thin disk
The Galactic thin disk is the relatively flat, rotating component of the Milky Way where most of its young to middle-aged stars, gas, and spiral arms are concentrated.
-
D.
Milky Way stellar halo
The Milky Way stellar halo is a vast, diffuse, roughly spherical population of old, metal-poor stars and dark matter that surrounds the Milky Way’s disk and bulge, extending far into its outer regions.
-
E.
Gould Belt
The Gould Belt is a nearby, partial ring of young stars, gas, and star-forming regions tilted to the Milky Way’s plane and encompassing many of the bright constellations visible from Earth.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical phenomenon
ⓘ
galactic dynamics phenomenon ⓘ |
| appliesTo |
barred spiral galaxies
ⓘ
irregular galaxies ⓘ lenticular galaxies ⓘ spiral galaxies ⓘ the Milky Way NERFINISHED ⓘ |
| characterizedBy |
approximately flat outer rotation curves
ⓘ
non-Keplerian velocity profiles ⓘ rotation velocity as a function of radius ⓘ |
| dependsOn |
galactic halo properties
ⓘ
radial mass distribution ⓘ total galactic mass ⓘ |
| describes |
large-scale motion around galactic centers
ⓘ
orbital motion of gas in galaxies ⓘ orbital motion of stars in galaxies ⓘ |
| evidenceFor |
existence of dark matter
ⓘ
extended dark matter halos ⓘ |
| field |
astrophysics
ⓘ
galactic astronomy ⓘ |
| hasKeyConcept |
Keplerian decline
ⓘ
MOND NERFINISHED ⓘ Newtonian gravity NERFINISHED ⓘ baryonic matter ⓘ circular velocity ⓘ dark matter halo ⓘ differential rotation ⓘ flat rotation curve ⓘ mass-to-light ratio ⓘ modified gravity theories ⓘ orbital period ⓘ rotation curve ⓘ |
| influences |
galactic disk stability
ⓘ
orbital resonances in disks ⓘ spiral arm structure ⓘ star formation patterns ⓘ |
| modeledBy |
N-body simulations
ⓘ
hydrodynamical simulations ⓘ mass distribution models ⓘ |
| relatedTo |
Oort constants
NERFINISHED
ⓘ
Tully–Fisher relation NERFINISHED ⓘ dark matter ⓘ galactic gravitational potential ⓘ mass distribution in galaxies ⓘ rotation curves of galaxies ⓘ |
| reveals |
distribution of dark matter in galaxies
ⓘ
distribution of visible matter in galaxies ⓘ total mass of galaxies ⓘ |
| studiedUsing |
21 cm hydrogen line observations
ⓘ
Doppler shift measurements ⓘ optical spectroscopy ⓘ radio astronomy ⓘ |
| usedFor |
estimating galaxy masses
ⓘ
probing dark matter distribution ⓘ testing gravity theories ⓘ |
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: Galactic rotation Description of subject: Galactic rotation is the large-scale orbital motion of stars and gas around the center of a galaxy, revealing its mass distribution and the presence of dark matter.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.