Mare Nubium
E897658
Mare Nubium is a large lunar mare located in the Moon’s southern near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mare Nubium canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10845672 — 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: Mare Nubium Context triple: [Mare Cognitum, adjacentTo, Mare Nubium]
-
A.
Mare Insularum
Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
-
B.
Mare Nectaris
Mare Nectaris is a small, circular lunar mare formed by an ancient impact basin on the Moon’s near side, known for its smooth basaltic plains and role in mapping the Moon’s geological history.
-
C.
Mare Fecunditatis
Mare Fecunditatis is a large lunar mare on the Moon’s near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
-
D.
Mare Serenitatis
Mare Serenitatis is a large lunar mare, or basaltic plain, on the Moon’s near side, easily visible from Earth as a dark, circular feature formed by ancient volcanic activity.
-
E.
Mare Crisium
Mare Crisium is a prominent, isolated lunar mare on the Moon’s near side, easily visible from Earth as a dark, circular basaltic plain.
- 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: Mare Nubium Target entity description: Mare Nubium is a large lunar mare located in the Moon’s southern near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
-
A.
Mare Insularum
Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
-
B.
Mare Nectaris
Mare Nectaris is a small, circular lunar mare formed by an ancient impact basin on the Moon’s near side, known for its smooth basaltic plains and role in mapping the Moon’s geological history.
-
C.
Mare Fecunditatis
Mare Fecunditatis is a large lunar mare on the Moon’s near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
-
D.
Mare Serenitatis
Mare Serenitatis is a large lunar mare, or basaltic plain, on the Moon’s near side, easily visible from Earth as a dark, circular feature formed by ancient volcanic activity.
-
E.
Mare Crisium
Mare Crisium is a prominent, isolated lunar mare on the Moon’s near side, easily visible from Earth as a dark, circular basaltic plain.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
lunar geological feature
ⓘ
lunar mare ⓘ |
| albedo | low ⓘ |
| appearance | dark ⓘ |
| astronomicalBodyType | lunar mare ⓘ |
| belongsTo | near side maria ⓘ |
| catalog | IAU-approved lunar feature ⓘ |
| composition | basalt ⓘ |
| coordinateSystem | selenographic coordinates ⓘ |
| discoveredBy | early telescopic observers ⓘ |
| featureType | mare ⓘ |
| formedBy | ancient volcanic activity ⓘ |
| formedDuring | Imbrian period ⓘ |
| geologicalAge | Imbrian ⓘ |
| hasEponym | Latin word "nubes" (cloud) ⓘ |
| hasFeature |
lava plains
ⓘ
rilles ⓘ wrinkle ridges ⓘ |
| hemisphere | southern lunar near side ⓘ |
| isPartOf | lunar nearside maria ⓘ |
| locatedOn |
Moon
NERFINISHED
ⓘ
lunar near side ⓘ |
| nameLanguage | Latin ⓘ |
| nameMeaning | Sea of Clouds NERFINISHED ⓘ |
| neighboringCrater |
Agatharchides
NERFINISHED
ⓘ
Birt NERFINISHED ⓘ Bullialdus NERFINISHED ⓘ Gauricus NERFINISHED ⓘ Guillaume NERFINISHED ⓘ Hesiodus NERFINISHED ⓘ Kies NERFINISHED ⓘ Liebig NERFINISHED ⓘ Nicollet NERFINISHED ⓘ Opelt NERFINISHED ⓘ Palus Epidemiarum NERFINISHED ⓘ Pitatus NERFINISHED ⓘ Thebit NERFINISHED ⓘ |
| neighboringFeature |
Mare Cognitum
NERFINISHED
ⓘ
Mare Fecunditatis NERFINISHED ⓘ Mare Humorum NERFINISHED ⓘ Mare Imbrium NERFINISHED ⓘ Mare Insularum NERFINISHED ⓘ Mare Nectaris NERFINISHED ⓘ |
| observationTargetFor |
amateur astronomers
ⓘ
lunar geologists ⓘ |
| observedFrom | Earth NERFINISHED ⓘ |
| surfaceType | basaltic plain ⓘ |
| visibility | naked eye ⓘ |
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: Mare Nubium Description of subject: Mare Nubium is a large lunar mare located in the Moon’s southern near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Mare Cognitum