Orion Arm
E18764
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.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Orion Arm canonical | 75 |
| Orion Arm of the Milky Way | 13 |
| Local Arm of the Milky Way | 2 |
| Orion Spur | 1 |
| Orion–Cygnus Arm segment near the Sun | 1 |
| Orion–Cygnus arm segment | 1 |
| Orion–Cygnus region of the Milky Way | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T156161 — 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: Orion Arm Context triple: [Sun, locatedIn, Orion Arm]
-
A.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Hyades
The Hyades are a sisterhood of nymphs in Greek mythology, best known for their association with rain and their representation as a prominent open star cluster in the constellation Taurus.
-
D.
Crescent
Crescent is a long-distance Amtrak passenger train that runs between New York City and New Orleans, serving major cities along the U.S. East Coast and Deep South.
-
E.
Alcyone
Alcyone is one of the Pleiades in Greek mythology, a daughter of the Titan Atlas and often associated with the star cluster of the same name.
- 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: Orion Arm Target entity description: 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.
-
A.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Hyades
The Hyades are a sisterhood of nymphs in Greek mythology, best known for their association with rain and their representation as a prominent open star cluster in the constellation Taurus.
-
D.
Crescent
Crescent is a long-distance Amtrak passenger train that runs between New York City and New Orleans, serving major cities along the U.S. East Coast and Deep South.
-
E.
Alcyone
Alcyone is one of the Pleiades in Greek mythology, a daughter of the Titan Atlas and often associated with the star cluster of the same name.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
minor spiral arm
ⓘ
spiral arm ⓘ |
| alsoKnownAs |
Local Arm
ⓘ
Local Spur ⓘ Orion Spur ⓘ
linked to:
Orion Arm
|
| approximateLength | about 10,000–20,000 light-years ⓘ |
| approximateWidth | about 3,500 light-years ⓘ |
| astronomicalDomain | Galactic astronomy ⓘ |
| contains |
Barnard's Loop
ⓘ
linked to:
Orion Molecular Cloud Complex
Carina Nebula ⓘ Cygnus X star-forming region ⓘ Double Cluster ⓘ Eagle Nebula ⓘ Earth ⓘ Gould Belt ⓘ Hyades star cluster ⓘ
linked to:
Hyades
Lagoon Nebula ⓘ Local Bubble ⓘ Local Interstellar Cloud ⓘ North America Nebula ⓘ Open cluster M11 ⓘ Open cluster M16 ⓘ Open cluster M17 ⓘ Open cluster M25 ⓘ Open cluster NGC 6530 ⓘ Orion Molecular Cloud Complex ⓘ Orion Nebula ⓘ Orion OB1 association ⓘ
linked to:
Orion Molecular Cloud Complex
Perseus OB2 association ⓘ Pleiades star cluster ⓘ
linked to:
Pleiades
Rosette Nebula ⓘ Scorpius–Centaurus OB association ⓘ Solar System ⓘ Sun ⓘ Trifid Nebula ⓘ local interstellar neighborhood ⓘ many H II regions ⓘ many stars visible to the naked eye ⓘ numerous molecular clouds ⓘ numerous open star clusters ⓘ numerous star-forming regions ⓘ |
| galacticRadiusFromCenter | about 8,000 parsecs ⓘ |
| locatedIn |
Milky Way galaxy
ⓘ
linked to:
Milky Way
|
| notableFor | containing the Solar System and many bright night-sky stars ⓘ |
| partOf | Milky Way ⓘ |
| positionInGalaxy | between Sagittarius Arm and Perseus Arm ⓘ |
| relativeSize |
minor arm compared to Perseus Arm
ⓘ
minor arm compared to Sagittarius Arm ⓘ |
| 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: Orion Arm Description of subject: 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.
Referenced by (94)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Orion Arm
linked to: Orion Arm
linked to: Orion Arm
subject linked to:
23 Tauri (star traditionally named Merope)
linked to: Orion Arm
linked to: Orion Arm
linked to: Orion Arm
subject linked to:
NGC 1499 (California Nebula)
linked to: Orion Arm
linked to: Orion Arm
linked to: Orion Arm
subject linked to:
open cluster NGC 2244
linked to: Orion Arm
subject linked to:
Sun is embedded within Local Spur