Mare Serenitatis
E566523
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Mare Serenitatis canonical | 9 |
| Mare Serenitatis region | 3 |
| Sea of Serenity | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6042801 — 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 Serenitatis Context triple: [Mare Tranquillitatis, boundedBy, Mare Serenitatis]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Mare Cognitum region, Oceanus Procellarum
The Mare Cognitum region in Oceanus Procellarum is a basaltic lunar mare on the Moon’s near side, notable as the site of NASA’s Apollo 12 crewed landing.
- 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 Serenitatis Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Mare Cognitum region, Oceanus Procellarum
The Mare Cognitum region in Oceanus Procellarum is a basaltic lunar mare on the Moon’s near side, notable as the site of NASA’s Apollo 12 crewed landing.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
basaltic plain
ⓘ
lunar mare ⓘ |
| adjacentTo |
Mare Imbrium
ⓘ
Mare Tranquillitatis ⓘ Mare Vaporum ⓘ |
| age | Imbrian period ⓘ |
| albedo | low ⓘ |
| albedoContrastWith | surrounding lunar highlands ⓘ |
| appearance | dark region ⓘ |
| basinType | multi-ring impact basin ⓘ |
| belongsTo | lunar maria ⓘ |
| boundedBy |
Montes Caucasus
ⓘ
Montes Haemus ⓘ Montes Taurus ⓘ |
| containsFeature | Serenitatis Basin ⓘ |
| diameter | approximately 674 km ⓘ |
| formedBy | ancient volcanic activity ⓘ |
| formedFrom | impact basin flooding by lava ⓘ |
| geologicAge | about 3.8 to 3.6 billion years ⓘ |
| hasCraterOnMargin |
Bessel
ⓘ
Menelaus ⓘ Posidonius ⓘ Sulpicius Gallus ⓘ |
| hasRegolith | fine lunar soil ⓘ |
| hasRille |
Rimae Menelaus
ⓘ
Rimae Sulpicius Gallus ⓘ |
| hasShape | roughly circular ⓘ |
| liesNear | Apollo 17 Taurus–Littrow landing site ⓘ |
| locatedIn | Serenitatis Basin ⓘ |
| locatedOn |
Moon
ⓘ
near side of the Moon ⓘ |
| mappedBy |
Lunar Orbiter missions
ⓘ
linked to:
Lunar Orbiter program
Lunar Reconnaissance Orbiter ⓘ |
| namedInLanguage | Latin ⓘ |
| nameMeaning |
Sea of Serenity
ⓘ
linked to:
Mare Serenitatis
|
| observedBy | ground-based telescopes ⓘ |
| partOf | near-side maria pattern visible to naked eye ⓘ |
| quadrant | northeastern near side of the Moon ⓘ |
| scientificInterest |
study of impact basin evolution
ⓘ
study of lunar volcanism ⓘ |
| selenographicLatitude | about 28.0° N ⓘ |
| selenographicLongitude | about 17.5° E ⓘ |
| surfaceComposition | basaltic lava flows ⓘ |
| visibleFrom | Earth ⓘ |
| visitedBy | Apollo 17 mission vicinity ⓘ |
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 Serenitatis Description of subject: 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.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Mare Serenitatis
subject linked to:
Luna 21 (flyby imaging context)
subject linked to:
Bessel crater on the Moon
linked to: Mare Serenitatis
linked to: Mare Serenitatis
linked to: Mare Serenitatis