Outer Galactic Arm
E480822
The Outer Galactic Arm is one of the Milky Way’s major spiral arms, located in its far outer regions and containing stars, gas, and dust orbiting the galactic center.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Outer Galactic Arm canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4885929 — 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: Outer Galactic Arm Context triple: [Outer Arm, hasAlternativeName, Outer Galactic Arm]
-
A.
Norma–Cygnus Arm
The Norma–Cygnus Arm is one of the major spiral arms of the Milky Way galaxy, located in its inner regions and rich in stars, gas, and star-forming regions.
-
B.
Sagittarius Arm
The Sagittarius Arm is one of the main spiral arms of the Milky Way galaxy, rich in star-forming regions and nebulae, located between the galactic center and the outer Perseus Arm.
-
C.
Scutum–Centaurus Arm
The Scutum–Centaurus Arm is one of the major spiral arms of the Milky Way galaxy, rich in stars, gas, and star-forming regions.
-
D.
Orion Arm
The Orion Arm is a minor spiral arm of the Milky Way galaxy that contains our Solar System and many of the stars visible in the night sky.
-
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: Outer Galactic Arm Target entity description: The Outer Galactic Arm is one of the Milky Way’s major spiral arms, located in its far outer regions and containing stars, gas, and dust orbiting the galactic center.
-
A.
Norma–Cygnus Arm
The Norma–Cygnus Arm is one of the major spiral arms of the Milky Way galaxy, located in its inner regions and rich in stars, gas, and star-forming regions.
-
B.
Sagittarius Arm
The Sagittarius Arm is one of the main spiral arms of the Milky Way galaxy, rich in star-forming regions and nebulae, located between the galactic center and the outer Perseus Arm.
-
C.
Scutum–Centaurus Arm
The Scutum–Centaurus Arm is one of the major spiral arms of the Milky Way galaxy, rich in stars, gas, and star-forming regions.
-
D.
Orion Arm
The Orion Arm is a minor spiral arm of the Milky Way galaxy that contains our Solar System and many of the stars visible in the night sky.
-
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 (47)
| Predicate | Object |
|---|---|
| instanceOf |
spiral arm
ⓘ
structure in the Milky Way ⓘ |
| belongsTo |
Galactic disk
ⓘ
linked to:
Milky Way
|
| contains |
H II regions
ⓘ
molecular clouds ⓘ open star clusters ⓘ star-forming regions ⓘ young massive stars ⓘ |
| hasAlternativeName |
Norma–Cygnus Arm
ⓘ
Outer Arm ⓘ |
| hasComponent |
interstellar dust
ⓘ
interstellar gas ⓘ stars ⓘ |
| hasDistanceFromSun | on the order of several kiloparsecs ⓘ |
| hasEnvironment | low-density outer Galactic disk ⓘ |
| hasGalactocentricRadius |
greater than 10 kiloparsecs
ⓘ
on the order of 13–15 kiloparsecs ⓘ |
| hasMorphologicalType | logarithmic spiral segment ⓘ |
| hasObservationChallenge |
intervening interstellar dust
ⓘ
large distance from the Sun ⓘ line-of-sight confusion with other spiral features ⓘ |
| hasProperty | rich in neutral hydrogen gas ⓘ |
| hasRole | outer boundary feature of Milky Way spiral structure ⓘ |
| hasStarFormationRate | lower than inner spiral arms ⓘ |
| hasUncertain |
detailed star formation history
ⓘ
exact extent ⓘ precise pitch angle ⓘ |
| influences |
distribution of gas in outer Milky Way
ⓘ
kinematics of outer disk stars ⓘ |
| isBeyond | Perseus Arm ⓘ |
| isConnectedTo | overall spiral pattern of the Milky Way ⓘ |
| isDistinguishedFrom |
Perseus Arm
ⓘ
Sagittarius Arm ⓘ Scutum–Centaurus Arm ⓘ |
| isLocatedRelativeToSun | outside the Sun’s orbit around the Galactic Center ⓘ |
| isMajorSpiralArmOf | Milky Way ⓘ |
| isMoreDistantThan | Perseus Arm ⓘ |
| isSpiralPatternFeatureOf |
Milky Way disk
ⓘ
linked to:
Milky Way
|
| isSubjectOf |
Galactic structure studies
ⓘ
radio astronomy surveys ⓘ spiral arm mapping ⓘ |
| isTracedBy |
21 cm hydrogen line emission
ⓘ
infrared observations ⓘ radio observations ⓘ |
| locatedIn | outer region of the Milky Way disk ⓘ |
| orbits |
Galactic Center
ⓘ
linked to:
Milky Way center
|
| partOf | Milky Way ⓘ |
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: Outer Galactic Arm Description of subject: The Outer Galactic Arm is one of the Milky Way’s major spiral arms, located in its far outer regions and containing stars, gas, and dust orbiting the galactic center.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.