Thor’s Helmet Nebula
E514436
Thor’s Helmet Nebula is an emission nebula and wind-blown bubble surrounding a massive Wolf–Rayet star, notable for its helmet-like shape and bright filaments.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Thor’s Helmet Nebula canonical | 2 |
| Thor's Helmet | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5259958 — 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: Thor’s Helmet Nebula Context triple: [Canis Major, contains, Thor’s Helmet Nebula]
-
A.
Heart Nebula
The Heart Nebula is a vast emission nebula in the constellation Cassiopeia, known for its heart-like shape and active star-forming regions.
-
B.
Pacman Nebula
The Pacman Nebula is a bright emission nebula in the constellation Cassiopeia, notable for its star-forming regions and distinctive shape that resembles the classic video game character Pac-Man.
-
C.
Pelican Nebula
The Pelican Nebula is a bright emission nebula in the constellation Cygnus, notable for its bird-like shape and active star-forming regions.
-
D.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
E.
Rosette Nebula
The Rosette Nebula is a large, circular emission nebula and active star-forming region located in the Milky Way, notable for its striking rose-like appearance in astrophotography.
- 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: Thor’s Helmet Nebula Target entity description: Thor’s Helmet Nebula is an emission nebula and wind-blown bubble surrounding a massive Wolf–Rayet star, notable for its helmet-like shape and bright filaments.
-
A.
Heart Nebula
The Heart Nebula is a vast emission nebula in the constellation Cassiopeia, known for its heart-like shape and active star-forming regions.
-
B.
Pacman Nebula
The Pacman Nebula is a bright emission nebula in the constellation Cassiopeia, notable for its star-forming regions and distinctive shape that resembles the classic video game character Pac-Man.
-
C.
Pelican Nebula
The Pelican Nebula is a bright emission nebula in the constellation Cygnus, notable for its bird-like shape and active star-forming regions.
-
D.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
E.
Rosette Nebula
The Rosette Nebula is a large, circular emission nebula and active star-forming region located in the Milky Way, notable for its striking rose-like appearance in astrophotography.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
astronomical object ⓘ emission nebula ⓘ wind-blown bubble ⓘ |
| alsoKnownAs |
Gum 4
ⓘ
linked to:
Gum
NGC 2359 ⓘ Sh2-298 ⓘ Sharpless 2-298 ⓘ |
| angularSize | about 8 arcminutes ⓘ |
| apparentMagnitude | approximately 11.5 ⓘ |
| associatedWith |
massive star evolution
ⓘ
pre-supernova stages of massive stars ⓘ |
| belongsToCatalogue |
Gum catalogue
ⓘ
linked to:
Gum
New General Catalogue ⓘ Sharpless catalogue ⓘ |
| catalogueNumber |
Gum 4
ⓘ
linked to:
Gum
NGC 2359 ⓘ Sh2-298 ⓘ |
| centralStarSpectralType | WN4 ⓘ |
| centralStarType | Wolf–Rayet star ⓘ |
| declination | −13° 13′ ⓘ |
| distanceFromEarth |
approximately 11,000 light-years
ⓘ
approximately 3,400 parsecs ⓘ |
| emits |
hydrogen-alpha radiation
ⓘ
oxygen-III emission ⓘ |
| environment | star-forming region in the Galactic plane ⓘ |
| formedBy | stellar winds from a massive star ⓘ |
| hasCentralStar | WR 7 ⓘ |
| hasColor |
bluish-green in OIII filters
ⓘ
reddish in H-alpha emission ⓘ |
| hasFeature | central bubble surrounded by complex filaments ⓘ |
| hasMorphology | bubble with bright filaments ⓘ |
| hasShape | helmet-like ⓘ |
| hasStructure |
bow-shock-like features
ⓘ
filamentary arcs ⓘ |
| isIn |
Milky Way galaxy
ⓘ
linked to:
Milky Way
Orion Arm ⓘ |
| isIonizedBy | radiation from Wolf–Rayet star WR 7 ⓘ |
| isTargetFor |
amateur astrophotography
ⓘ
professional spectroscopic studies ⓘ |
| locatedInConstellation | Canis Major ⓘ |
| namedAfter | Norse god Thor’s helmet ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ radio ⓘ |
| rightAscension | 07h 18m ⓘ |
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: Thor’s Helmet Nebula Description of subject: Thor’s Helmet Nebula is an emission nebula and wind-blown bubble surrounding a massive Wolf–Rayet star, notable for its helmet-like shape and bright filaments.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Thor’s Helmet Nebula