Hydra–Centaurus Supercluster

E123841

galaxy supercluster large-scale structure of the Universe

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.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (9)

Label	Occurrences
Hydra–Centaurus Supercluster canonical	8
Cluster of the Great Attractor	1
Great Attractor	1
Great Attractor mass concentration	1
Great Attractor region	1
Hydra–Centaurus Cluster	1
Hydra–Centaurus complex	1
Hydra–Centaurus–Pavo large-scale 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 complex ⓘ linked to: Hydra–Centaurus Supercluster
connectedTo	Pavo–Indus–Telescopium supercluster region ⓘ Shapley Supercluster via large-scale filaments ⓘ
contains	Abell 1060 ⓘ Abell 3526 ⓘ Abell 3627 ⓘ Centaurus Cluster ⓘ Centaurus Wall ⓘ Great Attractor mass concentration ⓘ linked to: Hydra–Centaurus Supercluster 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 Supercluster region ⓘ linked to: Pavo–Indus–Telescopium supercluster region Virgo Supercluster region ⓘ linked to: Virgo Supercluster
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