Messier 16
E239154
Messier 16, also known as the Eagle Nebula, is a young open star cluster embedded in a vast emission nebula famous for its towering star-forming gas and dust structures.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 16 canonical | 9 |
How this entity was disambiguated
This entity first appeared as the object of triple T2169424 — 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: Messier 16 Context triple: [Pillars of Creation, locatedIn, Messier 16]
-
A.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
-
B.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
-
C.
NGC 604
NGC 604 is a vast, luminous star-forming nebula in the Triangulum Galaxy, notable as one of the largest known H II regions in the Local Group.
-
D.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
E.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
- 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: Messier 16 Target entity description: Messier 16, also known as the Eagle Nebula, is a young open star cluster embedded in a vast emission nebula famous for its towering star-forming gas and dust structures.
-
A.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
-
B.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
-
C.
NGC 604
NGC 604 is a vast, luminous star-forming nebula in the Triangulum Galaxy, notable as one of the largest known H II regions in the Local Group.
-
D.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
E.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
astronomical object ⓘ emission nebula ⓘ open star cluster ⓘ |
| age | about 1–3 million years ⓘ |
| alsoKnownAs |
Eagle Nebula
ⓘ
M16 ⓘ NGC 6611 ⓘ |
| angularSize |
approximately 7 arcminutes by 5 arcminutes (cluster)
ⓘ
approximately 70 arcminutes by 50 arcminutes (nebula) ⓘ |
| apparentMagnitudeV | 6.0 ⓘ |
| bestSeenInMonth | July ⓘ |
| cataloguedBy | Charles Messier ⓘ |
| catalogueEntry | Messier catalogue ⓘ |
| contains | Pillars of Creation ⓘ |
| containsObjectType |
B-type stars
ⓘ
O-type stars ⓘ evaporating gaseous globules ⓘ protostars ⓘ |
| declination | −13° 47′ ⓘ |
| discoveredBy |
Charles Messier
ⓘ
Jean-Philippe de Chéseaux ⓘ
linked to:
Philippe Loys de Chéseaux
|
| discoveryYear | 1745 ⓘ |
| distanceFromEarth |
about 2,000 parsecs
ⓘ
about 7,000 light-years ⓘ |
| excites | surrounding H II region gas ⓘ |
| famousFor |
Pillars of Creation Hubble images
ⓘ
linked to:
Pillars of Creation
|
| hasApproximateStarCount | several thousand stars ⓘ |
| hasDustComponent | interstellar dust ⓘ |
| hasGasComponent |
ionized hydrogen
ⓘ
molecular hydrogen ⓘ |
| hasType |
star-forming region
ⓘ
young open cluster ⓘ |
| imagedBy |
Chandra X-ray Observatory
ⓘ
Hubble Space Telescope ⓘ Spitzer Space Telescope ⓘ |
| ionizedBy | massive hot stars in NGC 6611 ⓘ |
| locatedIn | Serpens OB1 association ⓘ |
| locatedInConstellation |
Serpens
ⓘ
Serpens Cauda ⓘ |
| locatedInGalaxy | Milky Way ⓘ |
| observedInWavelength |
X-ray
ⓘ
infrared ⓘ visible light ⓘ |
| partOf |
Sagittarius Arm of the Milky Way
ⓘ
linked to:
Sagittarius Arm
|
| rightAscension | 18h 18m ⓘ |
| spectralType | emission nebula dominated by hydrogen-alpha ⓘ |
| visibleFromHemisphere |
Northern Hemisphere
ⓘ
Southern Hemisphere ⓘ |
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: Messier 16 Description of subject: Messier 16, also known as the Eagle Nebula, is a young open star cluster embedded in a vast emission nebula famous for its towering star-forming gas and dust structures.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.