Mare Frigoris

E870827

Mare Frigoris is a long, dark lunar mare stretching across the Moon’s northern latitudes, formed by ancient basaltic lava flows.

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All labels observed (1)

Label Occurrences
Mare Frigoris canonical 1

Statements (46)

Predicate Object
instanceOf lunar mare
albedo low
appearance dark
belongsTo Moon nearside maria belt
lunar maria
borderedBy Lacus Mortis NERFINISHED
Lacus Somniorum NERFINISHED
Mare Crisium NERFINISHED
Mare Imbrium NERFINISHED
Mare Serenitatis NERFINISHED
Mare Tranquillitatis NERFINISHED
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 NERFINISHED
Eudoxus NERFINISHED
Plato NERFINISHED
isPartOf near side of the Moon
liesNorthOf Mare Imbrium NERFINISHED
Mare Serenitatis NERFINISHED
Mare Tranquillitatis NERFINISHED
liesWestOf Mare Crisium NERFINISHED
locatedIn Moon northern hemisphere
locatedOn Moon NERFINISHED
namedAfter Latin word "frigus" (cold)
namedBy Giovanni Battista Riccioli NERFINISHED
nameMeaning Sea of Cold NERFINISHED
namingYear 1651
observedFrom Earth NERFINISHED
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 (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mare Imbrium adjacentTo Mare Frigoris