Oort cloud
E19351
The Oort cloud is a distant, spherical shell of icy bodies surrounding the Solar System, thought to be the source of many long-period comets.
All labels observed (11)
| Label | Occurrences |
|---|---|
| Oort cloud canonical | 6 |
| Oort | 2 |
| outer Oort cloud | 2 |
| Oort Cloud | 1 |
| Oort Cloud hypothesis | 1 |
| Oort cloud hypothesis | 1 |
| classical Oort Cloud | 1 |
| inner Oort Cloud | 1 |
| inner Oort cloud | 1 |
| outer Oort Cloud | 1 |
| Öpik–Oort cloud | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T156249 — 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: Oort cloud Context triple: [Solar System, hasComponent, Oort cloud]
-
A.
Kuiper Belt objects
Kuiper Belt objects are icy celestial bodies orbiting the Sun beyond Neptune, thought to be remnants from the early solar system and the source of many short-period comets.
-
B.
Orion Arm
The Orion Arm is a minor spiral arm of the Milky Way galaxy that contains our Solar System and many of the stars visible in the night sky.
-
C.
Eris
Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
-
D.
Kosmos
Kosmos is Alexander von Humboldt’s multi-volume work that presents a comprehensive scientific and philosophical overview of the natural world and the universe.
-
E.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
- 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: Oort cloud Target entity description: The Oort cloud is a distant, spherical shell of icy bodies surrounding the Solar System, thought to be the source of many long-period comets.
-
A.
Kuiper Belt objects
Kuiper Belt objects are icy celestial bodies orbiting the Sun beyond Neptune, thought to be remnants from the early solar system and the source of many short-period comets.
-
B.
Orion Arm
The Orion Arm is a minor spiral arm of the Milky Way galaxy that contains our Solar System and many of the stars visible in the night sky.
-
C.
Eris
Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
-
D.
Kosmos
Kosmos is Alexander von Humboldt’s multi-volume work that presents a comprehensive scientific and philosophical overview of the natural world and the universe.
-
E.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
hypothetical astronomical structure
ⓘ
reservoir of comets ⓘ |
| alsoKnownAs |
Öpik–Oort cloud
ⓘ
linked to:
Oort cloud
|
| category |
comet cloud
ⓘ
outer Solar System object ⓘ |
| composition |
cometary nuclei
ⓘ
icy bodies ⓘ |
| contains |
dormant comets
ⓘ
long-period comets ⓘ |
| distanceScale | interstellar scale ⓘ |
| dynamicalRole | reservoir for comets entering inner Solar System ⓘ |
| environment | outer heliosphere boundary region ⓘ |
| evidenceType | orbits of long-period comets ⓘ |
| formationMechanism |
gravitational scattering by giant planets
ⓘ
subsequent perturbation by galactic forces ⓘ |
| formationOrigin | scattered planetesimals from early Solar System ⓘ |
| gravitationallyBoundTo | Sun ⓘ |
| hostStar | Sun ⓘ |
| influencedBy |
galactic tide
ⓘ
molecular clouds ⓘ passing stars ⓘ |
| innerBoundaryDistanceFromSun |
roughly 2,000 astronomical units
ⓘ
roughly 5,000 astronomical units ⓘ |
| innerOortCloudAlsoCalled | Hills cloud ⓘ |
| liesBeyond |
Kuiper belt
ⓘ
linked to:
Kuiper Belt objects
scattered disc ⓘ |
| locatedIn | outer Solar System ⓘ |
| mayOverlapWith | local interstellar medium ⓘ |
| namedAfter | Jan Oort ⓘ |
| observationalStatus | inferred but not directly observed as a whole ⓘ |
| orbitalCenter | Solar System barycenter ⓘ |
| outerBoundaryDistanceFromSun |
possibly up to about 100,000 astronomical units
ⓘ
up to about 50,000 astronomical units ⓘ |
| partOf | Solar System ⓘ |
| populationEstimate |
hundreds of billions of icy bodies
ⓘ
possibly trillions of icy bodies ⓘ |
| proposalYear | 1950 ⓘ |
| proposedBy | Jan Oort ⓘ |
| regionType | trans-Neptunian region ⓘ |
| relevance | key to understanding origin of comets ⓘ |
| shape | roughly spherical ⓘ |
| subdivision |
inner Oort cloud
ⓘ
linked to:
Oort cloud
outer Oort cloud ⓘ
linked to:
Oort cloud
|
| surrounds |
Sun
ⓘ
planetary region of the Solar System ⓘ |
| thoughtToBe | source of many long-period comets ⓘ |
| uncertainty |
exact extent unknown
ⓘ
exact mass unknown ⓘ |
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: Oort cloud Description of subject: The Oort cloud is a distant, spherical shell of icy bodies surrounding the Solar System, thought to be the source of many long-period comets.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
linked to: Oort cloud
subject linked to:
Jan Hendrik
linked to: Oort cloud