observable universe
E100929
The observable universe is the portion of the entire cosmos that we can in principle detect or observe from Earth, limited by the finite speed of light and the age of the universe.
All labels observed (1)
| Label | Occurrences |
|---|---|
| observable universe canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T869201 — 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: observable universe Context triple: [Local Group, isIn, observable universe]
-
A.
The Universe
The Universe is a popular science book by Isaac Asimov that explains the structure, history, and phenomena of the cosmos in accessible language for general readers.
-
B.
Laniakea Supercluster
Laniakea Supercluster is a vast cosmic structure encompassing the Milky Way and hundreds of thousands of other galaxies, forming one of the largest known galaxy superclusters in the observable universe.
-
C.
Big Bang cosmology
Big Bang cosmology is the prevailing scientific framework that explains the origin, early evolution, and large-scale structure of the universe as emerging from an extremely hot, dense initial state that has been expanding over time.
-
D.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
-
E.
Galaxy
Galaxy is a professional soccer club based in the Los Angeles area that competes in Major League Soccer and is known for signing high-profile international stars.
- 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: observable universe Target entity description: The observable universe is the portion of the entire cosmos that we can in principle detect or observe from Earth, limited by the finite speed of light and the age of the universe.
-
A.
The Universe
The Universe is a popular science book by Isaac Asimov that explains the structure, history, and phenomena of the cosmos in accessible language for general readers.
-
B.
Laniakea Supercluster
Laniakea Supercluster is a vast cosmic structure encompassing the Milky Way and hundreds of thousands of other galaxies, forming one of the largest known galaxy superclusters in the observable universe.
-
C.
Big Bang cosmology
Big Bang cosmology is the prevailing scientific framework that explains the origin, early evolution, and large-scale structure of the universe as emerging from an extremely hot, dense initial state that has been expanding over time.
-
D.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
-
E.
Galaxy
Galaxy is a professional soccer club based in the Los Angeles area that competes in Major League Soccer and is known for signing high-profile international stars.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
cosmological concept
ⓘ
physical region ⓘ |
| centeredOn |
Earth
ⓘ
observer ⓘ |
| contains |
baryonic matter
ⓘ
cosmic filaments ⓘ cosmic microwave background radiation ⓘ cosmic voids ⓘ dark energy ⓘ dark matter ⓘ galaxies ⓘ galaxy clusters ⓘ intergalactic medium ⓘ large-scale structure ⓘ superclusters ⓘ |
| excludes | regions beyond the particle horizon ⓘ |
| hasAgeConstraint | about 13.8 billion years since Big Bang ⓘ |
| hasApproximateComovingRadius |
14.3 gigaparsecs
ⓘ
46.5 billion light-years ⓘ |
| hasApproximateDiameter |
28.6 gigaparsecs
ⓘ
93 billion light-years ⓘ |
| hasCosmicMicrowaveBackgroundRedshift | about 1100 ⓘ |
| hasCosmologicalParameterDependence |
Hubble constant
ⓘ
dark energy density ⓘ matter density ⓘ spatial curvature ⓘ |
| hasDefinition | portion of the universe that can in principle be observed from Earth ⓘ |
| hasEstimatedNumberOfGalaxies | hundreds of billions to about two trillion ⓘ |
| hasEstimatedNumberOfStars | about 10^22 to 10^24 ⓘ |
| hasExpansionDescription | space within it is expanding ⓘ |
| hasHomogeneityProperty | approximately homogeneous on large scales ⓘ |
| hasHorizonType | particle horizon ⓘ |
| hasIsotropyProperty | approximately isotropic on large scales ⓘ |
| hasMassEstimate | on the order of 10^53 kg ⓘ |
| hasMostDistantObservedGalaxiesRedshift | greater than 10 ⓘ |
| hasObservationLimit | regions whose light has had time to reach us ⓘ |
| hasRadiusType | comoving radius ⓘ |
| hasShape | sphere in comoving coordinates ⓘ |
| limitedBy |
age of the universe
ⓘ
finite speed of light ⓘ |
| mayBeEqualTo | entire universe ⓘ |
| mayBeSmallerThan | entire universe ⓘ |
| measuredUsing |
redshift-distance relation
ⓘ
standard candles ⓘ standard rulers ⓘ |
| partOf | universe ⓘ |
| relatedTo |
Lambda-CDM model
ⓘ
cosmic light horizon ⓘ cosmological principle ⓘ |
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: observable universe Description of subject: The observable universe is the portion of the entire cosmos that we can in principle detect or observe from Earth, limited by the finite speed of light and the age of the universe.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.