Mare Fecunditatis
E569588
Mare Fecunditatis is a large lunar mare on the Moon’s near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Mare Fecunditatis canonical | 3 |
| Mare Fecunditatis region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6042802 — 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 Fecunditatis Context triple: [Mare Tranquillitatis, boundedBy, Mare Fecunditatis]
-
A.
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.
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B.
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.
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C.
Mare Tranquillitatis
Mare Tranquillitatis is a lunar mare on the Moon’s near side, best known as the site of Apollo 11’s first crewed Moon landing.
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D.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
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E.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
- 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 Fecunditatis Target entity description: Mare Fecunditatis is a large lunar mare on the Moon’s near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
-
A.
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.
-
B.
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.
-
C.
Mare Tranquillitatis
Mare Tranquillitatis is a lunar mare on the Moon’s near side, best known as the site of Apollo 11’s first crewed Moon landing.
-
D.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
-
E.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf | lunar mare ⓘ |
| albedo | low ⓘ |
| approximateArea | ~330,000 square kilometers ⓘ |
| approximateCenterLatitude | 7° S ⓘ |
| approximateCenterLongitude | 52° E ⓘ |
| approximateDiameter | ~840 km ⓘ |
| boundedByCrater |
Bellot
NERFINISHED
ⓘ
Colombo NERFINISHED ⓘ Cook NERFINISHED ⓘ Goclenius NERFINISHED ⓘ Humboldt NERFINISHED ⓘ Langrenus NERFINISHED ⓘ Lomonosov NERFINISHED ⓘ Messier NERFINISHED ⓘ Messier A NERFINISHED ⓘ Taruntius NERFINISHED ⓘ Vendelinus NERFINISHED ⓘ |
| celestialBodyType | mare ⓘ |
| coordinateSystem | selenographic coordinates ⓘ |
| discoveredBy | ancient naked-eye observers ⓘ |
| formedBy | ancient volcanic activity ⓘ |
| geologicalAge | mainly Upper Imbrian ⓘ |
| hasEnglishName | Sea of Fertility NERFINISHED ⓘ |
| hasLatinName | Mare Fecunditatis NERFINISHED ⓘ |
| hasNotableFeature |
Messier crater pair with ray system
ⓘ
wrinkle ridge system Dorsa Andrusov NERFINISHED ⓘ wrinkle ridge system Dorsa Geikie NERFINISHED ⓘ wrinkle ridge system Dorsa Mawson NERFINISHED ⓘ |
| isPartOf | lunar nearside maria ⓘ |
| locatedOn | Moon NERFINISHED ⓘ |
| locatedOnSideOfMoon | near side ⓘ |
| mappedByMission |
Apollo missions
NERFINISHED
ⓘ
Clementine mission NERFINISHED ⓘ Lunar Orbiter program NERFINISHED ⓘ Lunar Reconnaissance Orbiter NERFINISHED ⓘ |
| neighboringMare |
Mare Australe
NERFINISHED
ⓘ
Mare Crisium NERFINISHED ⓘ Mare Nectaris NERFINISHED ⓘ Mare Tranquillitatis NERFINISHED ⓘ |
| observationMethod | optical telescopes ⓘ |
| olderUnitsAge | Nectarian ⓘ |
| surfaceComposition | basalt ⓘ |
| surfaceFeature |
lava-flooded basin
ⓘ
small impact craters ⓘ wrinkle ridges ⓘ |
| surfaceType | basaltic plain ⓘ |
| visibleFrom | Earth NERFINISHED ⓘ |
| visualAppearance | dark ⓘ |
| youngerUnitsAge | Eratosthenian ⓘ |
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 Fecunditatis Description of subject: Mare Fecunditatis is a large lunar mare on the Moon’s near side, characterized by its dark basaltic plains formed from ancient volcanic activity.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mare Fecunditatis region