North America Nebula
E114010
The North America Nebula is a large, bright emission nebula in the constellation Cygnus whose shape strikingly resembles the North American continent.
All labels observed (1)
| Label | Occurrences |
|---|---|
| North America Nebula canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T868797 — 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: North America Nebula Context triple: [Orion Arm, contains, North America Nebula]
-
A.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
B.
Orion Nebula
The Orion Nebula is a bright, nearby stellar nursery where new stars and planetary systems are actively forming within the constellation Orion.
-
C.
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.
-
D.
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.
-
E.
Trifid Nebula
The Trifid Nebula is a bright, star-forming emission and reflection nebula in the constellation Sagittarius, notable for its three-lobed appearance created by dark dust lanes.
- 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: North America Nebula Target entity description: The North America Nebula is a large, bright emission nebula in the constellation Cygnus whose shape strikingly resembles the North American continent.
-
A.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
B.
Orion Nebula
The Orion Nebula is a bright, nearby stellar nursery where new stars and planetary systems are actively forming within the constellation Orion.
-
C.
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.
-
D.
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.
-
E.
Trifid Nebula
The Trifid Nebula is a bright, star-forming emission and reflection nebula in the constellation Sagittarius, notable for its three-lobed appearance created by dark dust lanes.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
diffuse nebula ⓘ emission nebula ⓘ |
| alsoKnownAs |
Caldwell 20
ⓘ
NGC 7000 ⓘ |
| angularSize | about 120 arcminutes × 100 arcminutes ⓘ |
| apparentMagnitudeV | about 4.0 ⓘ |
| belongsTo |
Caldwell objects
ⓘ
NGC objects ⓘ |
| bestSeenFrom | Northern Hemisphere ⓘ |
| bestViewingSeason | summer ⓘ |
| catalog |
Caldwell catalogue
ⓘ
New General Catalogue ⓘ |
| catalogNumber |
C20
ⓘ
NGC 7000 ⓘ |
| color | reddish ⓘ |
| commonImagingBand |
OIII
ⓘ
SII ⓘ narrowband H-alpha ⓘ |
| constellation | Cygnus ⓘ |
| contains | regions of active star formation ⓘ |
| declination | +44° 20′ ⓘ |
| discoveredBy | William Herschel ⓘ |
| discoveryDate | 1786 ⓘ |
| distanceFromEarth |
about 2600 light-years
ⓘ
about 800 parsecs ⓘ |
| dominantEmissionLine | H-alpha ⓘ |
| galacticLatitude | about +0.5° ⓘ |
| galacticLongitude | about 85° ⓘ |
| ionizingSource | massive O-type star ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Arm ⓘ |
| nearbyObject | Pelican Nebula ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf |
Cygnus X star-forming region
ⓘ
surface form:
Cygnus X region
Cygnus molecular cloud complex ⓘ |
| regionNickname |
East Coast of the United States
ⓘ
surface form:
East Coast region
Gulf of Mexico ⓘ
surface form:
Gulf of Mexico region
Mexico region ⓘ |
| rightAscension | 20h 58m ⓘ |
| separatedFrom | Pelican Nebula by dark dust lane ⓘ |
| shapeResembles | North American continent ⓘ |
| spectralTypeOfExcitingStars | O-type ⓘ |
| visibleWith |
small telescope
ⓘ
wide-field binoculars ⓘ |
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: North America Nebula Description of subject: The North America Nebula is a large, bright emission nebula in the constellation Cygnus whose shape strikingly resembles the North American continent.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Cygnus