Mare Imbrium
E247684
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.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Mare Imbrium canonical | 30 |
| Mare Imbrium region | 8 |
| Mare Imbrium basin region | 2 |
| Mare Imbrium basalt plains | 1 |
| Mare Imbrium basin | 1 |
| Mare Imbrium from southern highland terrain | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2238448 — 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 Imbrium Context triple: [Apollo 15, lunarLandingRegion, Mare Imbrium]
-
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 Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
C.
Odysseus impact basin
The Odysseus impact basin is a large, prominent impact crater on Saturn’s icy moon Tethys, notable for its immense size and relatively shallow, relaxed topography.
-
D.
Mare Imbrium vicinity
Mare Imbrium vicinity refers to the area surrounding the Moon’s large Mare Imbrium basin, a prominent dark lava plain in the lunar northwest near which the Soviet Luna 2 spacecraft impacted.
-
E.
Baade lunar crater
Baade lunar crater is a large impact feature on the Moon’s far side named in honor of German astronomer Walter Baade.
- 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 Imbrium Target entity description: 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.
-
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 Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
C.
Odysseus impact basin
The Odysseus impact basin is a large, prominent impact crater on Saturn’s icy moon Tethys, notable for its immense size and relatively shallow, relaxed topography.
-
D.
Mare Imbrium vicinity
Mare Imbrium vicinity refers to the area surrounding the Moon’s large Mare Imbrium basin, a prominent dark lava plain in the lunar northwest near which the Soviet Luna 2 spacecraft impacted.
-
E.
Baade lunar crater
Baade lunar crater is a large impact feature on the Moon’s far side named in honor of German astronomer Walter Baade.
- F. None of above. chosen
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
lunar geological feature
ⓘ
lunar mare ⓘ |
| adjacentTo |
Mare Frigoris
ⓘ
Mare Serenitatis ⓘ Oceanus Procellarum ⓘ |
| age | Imbrian period ⓘ |
| appears | dark to the naked eye from Earth ⓘ |
| approximateAgeInBillionsOfYears | 3.8 ⓘ |
| approximateDiameterInKilometers | 1120 ⓘ |
| area | approximately 830000 square kilometers ⓘ |
| basinType | multi-ring impact basin ⓘ |
| boundedBy |
Montes Alpes
ⓘ
Montes Apenninus ⓘ
linked to:
Apennines
Montes Carpatus ⓘ Montes Caucasus ⓘ |
| composedPrimarilyOf | basaltic lava flows ⓘ |
| containsCrater |
Archimedes
ⓘ
Copernicus vicinity ⓘ Plato ⓘ |
| diameter | approximately 1120 kilometers ⓘ |
| filledBy | mare basalts ⓘ |
| formedBy |
ancient volcanic activity
ⓘ
large impact event ⓘ |
| hasAlbedo | low ⓘ |
| is |
one of the largest impact basins in the Solar System
ⓘ
vast dark plain ⓘ |
| isPartOf |
Imbrium Basin
ⓘ
linked to:
Imbrium Basin ejecta zone
|
| landingSiteOf |
Apollo 15 region (near Montes Apenninus)
ⓘ
linked to:
Imbrium Basin ejecta zone
Luna 17 ⓘ Lunokhod 1 ⓘ
linked to:
Luna 17
|
| latinNameMeaning |
Sea of Rains
ⓘ
linked to:
Sea of Showers
Sea of Showers ⓘ |
| locatedOn | Moon ⓘ |
| locatedOnSideOfMoon | near side ⓘ |
| notableFor | large circular outline ⓘ |
| usedAs | prominent feature for lunar cartography ⓘ |
| visibleFrom | Earth with 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 Imbrium Description of subject: 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.
Referenced by (43)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
subject linked to:
Cassini crater on the Moon
subject linked to:
Cassini crater on the Moon
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
linked to: Mare Imbrium
subject linked to:
Archimedes
subject linked to:
Archimedes
linked to: Mare Imbrium
linked to: Mare Imbrium
subject linked to:
Ocean of Storms on Moon