Hydra–Centaurus Supercluster
E123841
The Hydra–Centaurus Supercluster is a massive nearby concentration of galaxy clusters that forms one of the dominant structures in our cosmic neighborhood and serves as a major component of the larger Laniakea Supercluster.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Great Attractor | 1 |
| Great Attractor mass concentration | 1 |
| Great Attractor region | 1 |
| Hydra–Centaurus Supercluster canonical | 1 |
| Hydra–Centaurus complex | 1 |
| Pavo–Indus filament | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1014567 — 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: Hydra–Centaurus Supercluster Context triple: [Laniakea Supercluster, contains, Hydra–Centaurus Supercluster]
-
A.
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.
-
B.
Centaurus A/M83 Group
The Centaurus A/M83 Group is a nearby galaxy group dominated by the massive galaxies Centaurus A and Messier 83, forming one of the closest large-scale neighbors to our own galactic neighborhood.
-
C.
Virgo Cluster
The Virgo Cluster is a massive, nearby galaxy cluster that serves as the central, dominant concentration of galaxies in our local region of the universe.
-
D.
M81 Group
The M81 Group is a nearby collection of galaxies in the constellation Ursa Major, dominated by the large spiral galaxy Messier 81 and known for its interacting members and active star formation.
-
E.
Andromeda subgroup
The Andromeda subgroup is the collection of galaxies gravitationally bound to and dominated by the Andromeda Galaxy (M31) within the Local Group.
- 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: Hydra–Centaurus Supercluster Target entity description: The Hydra–Centaurus Supercluster is a massive nearby concentration of galaxy clusters that forms one of the dominant structures in our cosmic neighborhood and serves as a major component of the larger Laniakea Supercluster.
-
A.
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.
-
B.
Centaurus A/M83 Group
The Centaurus A/M83 Group is a nearby galaxy group dominated by the massive galaxies Centaurus A and Messier 83, forming one of the closest large-scale neighbors to our own galactic neighborhood.
-
C.
Virgo Cluster
The Virgo Cluster is a massive, nearby galaxy cluster that serves as the central, dominant concentration of galaxies in our local region of the universe.
-
D.
M81 Group
The M81 Group is a nearby collection of galaxies in the constellation Ursa Major, dominated by the large spiral galaxy Messier 81 and known for its interacting members and active star formation.
-
E.
Andromeda subgroup
The Andromeda subgroup is the collection of galaxies gravitationally bound to and dominated by the Andromeda Galaxy (M31) within the Local Group.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
galaxy supercluster
ⓘ
large-scale structure of the Universe ⓘ |
| alsoKnownAs |
Hydra–Centaurus
ⓘ
Hydra–Centaurus Supercluster ⓘ
surface form:
Hydra–Centaurus complex
|
| connectedTo |
Pavo–Indus–Telescopium supercluster region
ⓘ
Shapley Supercluster via large-scale filaments ⓘ |
| contains |
Abell 1060
ⓘ
Abell 3526 ⓘ Abell 3627 ⓘ Centaurus Cluster ⓘ Centaurus Wall ⓘ Hydra–Centaurus Supercluster self-linksurface differs ⓘ
surface form:
Great Attractor mass concentration
Hydra Cluster ⓘ Hydra Wall ⓘ Norma Cluster ⓘ Pavo–Indus filament ⓘ |
| coordinateSystem | described in supergalactic coordinates ⓘ |
| cosmologicalContext |
used to study large-scale structure formation
ⓘ
used to study peculiar velocity fields in the local Universe ⓘ |
| discoveredBy | extragalactic astronomers in late 20th century ⓘ |
| distanceFromEarth | approximately 150–200 million light-years ⓘ |
| environment | overdense region relative to cosmic mean matter density ⓘ |
| hasGravitationalEffectOn | nearby galaxy flows within Laniakea ⓘ |
| hasRole | major mass concentration influencing local galaxy motions ⓘ |
| hasSignificance |
dominant overdensity in the local Universe
ⓘ
key anchor of the Laniakea Supercluster definition ⓘ |
| hasSubstructure |
galaxy groups and filaments
ⓘ
multiple Abell galaxy clusters ⓘ |
| influences |
motion of the Milky Way
ⓘ
peculiar velocities of galaxies in the Local Group ⓘ |
| isComponentOf | gravitational basin of Laniakea Supercluster ⓘ |
| isDynamicallyConnectedTo | Great Attractor region ⓘ |
| isNeighborOf |
Pavo–Indus–Telescopium supercluster region
ⓘ
surface form:
Pavo–Indus Supercluster region
Virgo Supercluster ⓘ
surface form:
Virgo Supercluster region
|
| isPartOf | cosmic web ⓘ |
| locatedIn |
constellation Centaurus
ⓘ
constellation Hydra ⓘ local cosmic neighborhood ⓘ nearby Universe ⓘ |
| mass | on the order of 10^16 solar masses (approximate) ⓘ |
| partOf | Laniakea Supercluster ⓘ |
| redshift | approximately 0.01–0.03 ⓘ |
| studiedUsing |
X-ray observations of galaxy clusters
ⓘ
redshift surveys ⓘ |
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: Hydra–Centaurus Supercluster Description of subject: The Hydra–Centaurus Supercluster is a massive nearby concentration of galaxy clusters that forms one of the dominant structures in our cosmic neighborhood and serves as a major component of the larger Laniakea Supercluster.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Great Attractor region
this entity surface form:
Great Attractor
this entity surface form:
Pavo–Indus filament
this entity surface form:
Hydra–Centaurus complex
this entity surface form:
Great Attractor mass concentration