Mare Frigoris
E870827
Mare Frigoris is a long, dark lunar mare stretching across the Moon’s northern latitudes, formed by ancient basaltic lava flows.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Mare Frigoris canonical | 2 |
| Mare Frigoris region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10501599 — 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 Frigoris Context triple: [Mare Imbrium, adjacentTo, Mare Frigoris]
-
A.
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.
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B.
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.
-
C.
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.
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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 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.
- 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 Frigoris Target entity description: Mare Frigoris is a long, dark lunar mare stretching across the Moon’s northern latitudes, formed by ancient basaltic lava flows.
-
A.
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.
-
B.
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.
-
C.
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.
-
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 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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | lunar mare ⓘ |
| albedo | low ⓘ |
| appearance | dark ⓘ |
| belongsTo |
Moon nearside maria belt
ⓘ
lunar maria ⓘ |
| borderedBy |
Lacus Mortis
ⓘ
Lacus Somniorum ⓘ Mare Crisium ⓘ Mare Imbrium ⓘ Mare Serenitatis ⓘ Mare Tranquillitatis ⓘ |
| contrastWith | lunar highlands ⓘ |
| coordinateSystem | selenographic coordinates ⓘ |
| discoverer | early telescopic astronomers ⓘ |
| extendsFrom | near crater Plato in the west ⓘ |
| extendsTo | near Mare Crisium in the east ⓘ |
| formationProcess | ancient volcanic flooding ⓘ |
| geologicAge | Imbrian ⓘ |
| hasFeature |
few large impact craters compared to highlands
ⓘ
relatively smooth surface ⓘ |
| hasNeighboringCrater |
Aristoteles
ⓘ
linked to:
Aristotle
Eudoxus ⓘ Plato ⓘ |
| isPartOf | near side of the Moon ⓘ |
| liesNorthOf |
Mare Imbrium
ⓘ
Mare Serenitatis ⓘ Mare Tranquillitatis ⓘ |
| liesWestOf | Mare Crisium ⓘ |
| locatedIn | Moon northern hemisphere ⓘ |
| locatedOn | Moon ⓘ |
| namedAfter | Latin word "frigus" (cold) ⓘ |
| namedBy | Giovanni Battista Riccioli ⓘ |
| nameMeaning | Sea of Cold ⓘ |
| namingYear | 1651 ⓘ |
| observedFrom | Earth ⓘ |
| orientation | east–west ⓘ |
| regionType | lowland plain ⓘ |
| scientificInterest |
records history of lunar volcanism
ⓘ
used to study thickness of lunar crust in northern nearside ⓘ |
| selenographicLatitudeRange | high northern latitudes ⓘ |
| shape | elongated ⓘ |
| spectralType | basaltic mare material ⓘ |
| surfaceComposition | basaltic lava flows ⓘ |
| surfaceGravity | lunar gravity ⓘ |
| surfaceType | solidified basaltic plain ⓘ |
| visibility | visible to naked eye from Earth under favorable conditions ⓘ |
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 Frigoris Description of subject: Mare Frigoris is a long, dark lunar mare stretching across the Moon’s northern latitudes, formed by ancient basaltic lava flows.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Mare Frigoris