Lagoon Nebula
E110244
The Lagoon Nebula is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, visible even to the naked eye under dark skies.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Lagoon Nebula canonical | 22 |
| M8 (Lagoon Nebula) | 2 |
| Lagoon Nebula H II region | 1 |
| Lagoon Nebula complex | 1 |
| Lagoon Nebula region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T868794 — 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: Lagoon Nebula Context triple: [Orion Arm, contains, Lagoon 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.
Southern Ring Nebula
The Southern Ring Nebula is a bright, roughly 2,000-light-year-distant planetary nebula in the constellation Vela, formed from the outer layers of a dying sun-like star and notable for its intricate, colorful gas shells.
- 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: Lagoon Nebula Target entity description: The Lagoon Nebula is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, visible even to the naked eye under dark skies.
-
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.
Southern Ring Nebula
The Southern Ring Nebula is a bright, roughly 2,000-light-year-distant planetary nebula in the constellation Vela, formed from the outer layers of a dying sun-like star and notable for its intricate, colorful gas shells.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
deep-sky object ⓘ emission nebula ⓘ nebula ⓘ star-forming region ⓘ |
| ageOfYoungStars | a few million years ⓘ |
| alsoKnownAs |
M8
ⓘ
Messier 8 ⓘ NGC 6523 ⓘ |
| angularSize | about 90 arcminutes by 40 arcminutes ⓘ |
| apparentMagnitudeV | about 6.0 ⓘ |
| appearsColor |
pink
ⓘ
red ⓘ |
| bestSeenFromHemisphere |
Southern Hemisphere
ⓘ
low northern latitudes ⓘ |
| catalog |
Messier catalogue
ⓘ
New General Catalogue ⓘ |
| contains |
Bok globules
ⓘ
Hourglass Nebula region ⓘ dark dust lanes ⓘ open cluster NGC 6530 ⓘ
linked to:
Open cluster NGC 6530
young massive stars ⓘ |
| declination | −24° 23′ ⓘ |
| discoveredBy | Giovanni Battista Hodierna ⓘ |
| discoveryCentury | 17th century ⓘ |
| distanceFromEarth |
about 1,200 parsecs
ⓘ
about 4,000 light-years ⓘ |
| dominantEmissionLine | hydrogen-alpha ⓘ |
| galacticLatitude | about −6 degrees ⓘ |
| galacticLongitude | about 6 degrees ⓘ |
| hasObjectType | diffuse nebula ⓘ |
| hasSpectralType | H II emission ⓘ |
| hasStarFormationActivity | ongoing ⓘ |
| ionizingSources | hot O-type stars ⓘ |
| isTargetFor |
amateur astronomers
ⓘ
professional observatories ⓘ |
| liesInDirectionOf |
Galactic Center region
ⓘ
linked to:
Milky Way center
|
| liesNear | Trifid Nebula ⓘ |
| locatedIn |
Sagittarius Arm of the Milky Way
ⓘ
linked to:
Sagittarius Arm
|
| locatedInConstellation | Sagittarius ⓘ |
| notableIonizingStar | 9 Sagittarii ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ radio ⓘ |
| partOf | Milky Way ⓘ |
| regionType | giant molecular cloud complex ⓘ |
| rightAscension | 18h 03m ⓘ |
| visibleToNakedEye | true ⓘ |
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: Lagoon Nebula Description of subject: The Lagoon Nebula is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, visible even to the naked eye under dark skies.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Open cluster NGC 6530
subject linked to:
Open cluster NGC 6530
subject linked to:
Open cluster NGC 6530
linked to: Lagoon Nebula
linked to: Lagoon Nebula
subject linked to:
H II regions
linked to: Lagoon Nebula
linked to: Lagoon Nebula
linked to: Lagoon Nebula