Outer Arm
E109438
The Outer Arm is one of the Milky Way galaxy’s major spiral arms, located farther from the galactic center than the Perseus Arm and containing stars, gas, and dust in the outer disk.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Outer Arm canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T934082 — 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 Arm Context triple: [Perseus Arm, liesInside, Outer Arm]
-
A.
ARMIR
ARMIR was the Italian 8th Army deployed on the Eastern Front during World War II, best known for its disastrous defeat alongside German forces in the Soviet Union.
-
B.
Vestini
The Vestini were an ancient Italic tribe that inhabited the central Apennine region of Italy, particularly in what is now Abruzzo, during the pre-Roman and early Roman periods.
-
C.
Schievelbein
Schievelbein is a historic town in Pomerania, now known as Świdwin in northwestern Poland.
-
D.
Burlington armour
Burlington armour is a British-developed composite tank armour system, better known as Chobham armour, designed to provide enhanced protection against both kinetic and shaped-charge threats.
-
E.
Local Arm
The Local Arm is the minor spiral arm of the Milky Way galaxy where our Solar System is located, situated between the larger Sagittarius and Perseus arms.
- 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 Arm Target entity description: The Outer Arm is one of the Milky Way galaxy’s major spiral arms, located farther from the galactic center than the Perseus Arm and containing stars, gas, and dust in the outer disk.
-
A.
ARMIR
ARMIR was the Italian 8th Army deployed on the Eastern Front during World War II, best known for its disastrous defeat alongside German forces in the Soviet Union.
-
B.
Vestini
The Vestini were an ancient Italic tribe that inhabited the central Apennine region of Italy, particularly in what is now Abruzzo, during the pre-Roman and early Roman periods.
-
C.
Schievelbein
Schievelbein is a historic town in Pomerania, now known as Świdwin in northwestern Poland.
-
D.
Burlington armour
Burlington armour is a British-developed composite tank armour system, better known as Chobham armour, designed to provide enhanced protection against both kinetic and shaped-charge threats.
-
E.
Local Arm
The Local Arm is the minor spiral arm of the Milky Way galaxy where our Solar System is located, situated between the larger Sagittarius and Perseus arms.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
spiral arm
ⓘ
structure in the Milky Way ⓘ |
| belongsTo | Galactic spiral pattern ⓘ |
| composedOf |
gas and dust lanes
ⓘ
stellar populations ⓘ |
| contains |
interstellar dust
ⓘ
interstellar gas ⓘ stars ⓘ |
| distanceFromSun | greater than distance of Perseus Arm from Sun ⓘ |
| extendsThrough | outer Galactic quadrants ⓘ |
| fartherFrom | Galactic Center than the Perseus Arm ⓘ |
| hasAlternativeName |
Norma–Cygnus Arm
ⓘ
surface form:
Norma–Cygnus Arm (in some models)
Outer Galactic Arm ⓘ |
| hasPart |
H II regions
ⓘ
molecular clouds ⓘ neutral hydrogen clouds ⓘ star-forming regions ⓘ |
| hasProperty |
associated with ongoing star formation
ⓘ
contains relatively low metallicity stars compared to inner arms ⓘ contains young stellar objects ⓘ |
| isBeyond | Perseus Arm ⓘ |
| isLessProminentThan | Perseus Arm ⓘ |
| isLocatedAt | larger Galactocentric radius than the Sun ⓘ |
| isMajorArmOf | Milky Way ⓘ |
| isMappedUsing |
infrared star counts
ⓘ
parallax measurements of masers ⓘ surveys of neutral hydrogen ⓘ |
| isMoreDistantThan | Perseus Arm ⓘ |
| isPartOf | outer spiral structure of the Milky Way ⓘ |
| isTracedBy |
21-cm hydrogen line emission
ⓘ
CO molecular line emission ⓘ radio observations ⓘ |
| locatedIn | outer region of the Milky Way galaxy ⓘ |
| observedIn |
infrared wavelengths
ⓘ
radio wavelengths ⓘ |
| orientation | roughly follows the Milky Way’s global spiral pattern ⓘ |
| partOf |
Milky Way
ⓘ
Galactic thin disk ⓘ
surface form:
Milky Way disk
|
| roleInGalaxy |
contributes to overall mass distribution of the Milky Way disk
ⓘ
hosts part of the Milky Way’s star formation in the outer disk ⓘ |
| studiedBy |
Galactic structure researchers
ⓘ
radio astronomers ⓘ |
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 Arm Description of subject: The Outer Arm is one of the Milky Way galaxy’s major spiral arms, located farther from the galactic center than the Perseus Arm and containing stars, gas, and dust in the outer disk.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.