Perseus Spiral Arm
E482627
The Perseus Spiral Arm is one of the major spiral arms of the Milky Way galaxy, located outside the Sun’s orbit and rich in star-forming regions and nebulae.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Perseus Arm of the Milky Way | 4 |
| Perseus arm of the Milky Way | 2 |
| Perseus Spiral Arm canonical | 1 |
| Perseus spiral arm | 1 |
| Perseus spiral arm star-forming complex | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4886128 — 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: Perseus Spiral Arm Context triple: [NGC 281, partOf, Perseus Spiral Arm]
-
A.
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.
-
B.
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.
-
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.
Outer Galactic Arm
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.
-
E.
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.
- 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: Perseus Spiral Arm Target entity description: The Perseus Spiral Arm is one of the major spiral arms of the Milky Way galaxy, located outside the Sun’s orbit and rich in star-forming regions and nebulae.
-
A.
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.
-
B.
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.
-
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.
Outer Galactic Arm
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.
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E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
spiral arm
ⓘ
structure in the Milky Way ⓘ |
| composition |
dust
ⓘ
gas ⓘ stars ⓘ |
| contains |
Auriga star-forming regions
ⓘ
Cassiopeia OB associations ⓘ H II regions ⓘ IC 1805 (Heart Nebula) ⓘ IC 1848 (Soul Nebula) ⓘ NGC 1499 (California Nebula) ⓘ NGC 7538 star-forming region ⓘ
linked to:
NGC 7538
Perseus OB associations ⓘ
linked to:
Perseus OB2 association
Perseus molecular cloud complex ⓘ W3 star-forming region ⓘ W4 star-forming region ⓘ W5 star-forming region ⓘ massive stars ⓘ molecular clouds ⓘ nebulae ⓘ star-forming regions ⓘ young star clusters ⓘ |
| distanceFromGalacticCenter | greater than the Sun’s galactocentric distance ⓘ |
| distanceFromSun | several kiloparsecs ⓘ |
| galacticLongitudeRange | spans a wide range of Galactic longitudes in the northern sky ⓘ |
| galacticRegionType | major spiral arm ⓘ |
| galacticStructureOrder | outer major arm relative to the Sun ⓘ |
| locatedIn |
Milky Way disk
ⓘ
linked to:
Milky Way
|
| namedAfter | constellation Perseus ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| orientation | roughly follows the Galactic plane ⓘ |
| partOf | Milky Way ⓘ |
| positionRelativeToSun |
farther from the Galactic Center than the Sun
ⓘ
outside the Sun’s orbit ⓘ |
| relatedStructure |
Orion–Cygnus Spur
ⓘ
linked to:
Orion–Cygnus Arm
Sagittarius Spiral Arm ⓘ
linked to:
Sagittarius Arm
|
| researchField | Galactic astronomy ⓘ |
| roleInGalaxy | site of ongoing star formation in the Milky Way ⓘ |
| spiralPatternRole | major component of the Milky Way spiral pattern ⓘ |
| studiedUsing |
VLBI parallax measurements
ⓘ
infrared surveys of young stellar objects ⓘ radio surveys of HI and CO ⓘ |
| tracedBy |
maser sources
ⓘ
molecular gas (CO) ⓘ neutral hydrogen (HI) ⓘ young massive stars ⓘ |
| visibleFrom | Earth ⓘ |
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: Perseus Spiral Arm Description of subject: The Perseus Spiral Arm is one of the major spiral arms of the Milky Way galaxy, located outside the Sun’s orbit and rich in star-forming regions and nebulae.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
NGC 281 (Pacman Nebula)
linked to: Perseus Spiral Arm
linked to: Perseus Spiral Arm
linked to: Perseus Spiral Arm
linked to: Perseus Spiral Arm
linked to: Perseus Spiral Arm
linked to: Perseus Spiral Arm