supercluster


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Related to supercluster: Virgo Supercluster

supercluster

(soo -per-klus-ter) A loosely bound aggregate of several clusters of galaxies, about 100 megaparsecs in extent. As seen in the sky, different superclusters overlap; their members can be distinguished only after the distances of the constituent galaxies have been determined from a redshift survey. Over a dozen superclusters have been identified, the nearest of which include the Local Supercluster, the Pisces–Perseus supercluster, the Shapley supercluster, and Hydra–Centaurus. Superclusters contain between 2 and 15 rich clusters and have total masses of up to 1016 solar masses. Although the galaxies within each cluster are tightly bound, the clusters' gravitational effect on each other is not sufficient to overcome the expansion of the Universe. Each supercluster is thus growing in extent, although more slowly than the space between the superclusters. The larger superclusters appear to be elongated with no central concentration or axial symmetry, and form parts of filaments that surround empty voids (see large-scale structure).
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

supercluster

[′sü·pər‚kləs·tər]
(astronomy)
An association of galaxy clusters and groups, typically composed of a few rich clusters and many poorer groups and isolated galaxies.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Intriguingly, he finds that these presumably feeble GRBs tend to be clustered along the plane of the Local Supercluster. This suggests that Norris's sample originated relatively locally, and it bolsters the notion that the "lag-luminosity" relationship indeed can provide at least a crude indication of a GRB's distance.
After the Virgo Supercluster (also known as the Local Supercluster), the Hydra-Centaurus complex is the nearest supercluster, and its relative proximity yields several easily accessible fields for intrepid galaxy hunters.
The winter sky is home to one of the largest known structures of all--the Pisces-Perseus Supercluster. This celestial filament stretches from the Perseus Galaxy Cluster (Abell 426) through the rich clusters Abell 347 and Abell 262 in Andromeda on toward the NGC 507 and NGC 383 galaxy groups in northern Pisces.
Astronomers see large numbers of galaxies concentrated in superclusters and in sheets, or "walls," accompanied by neighboring "voids" holding significantly smaller galactic populations.
The Digital Supercluster connects a range of digital technology market participants including start-ups, innovative Small and Medium Enterprises (SME), postsecondary institutions and large multinational corporations.
Avcorp is a member of Canada's Digital Technology Supercluster ("CDTS").
Morrison spoke about his experiences with getting Sudbury's mining innovation supercluster together, explaining that while the bid didn't get government approval, it did succeed in bringing companies and institutions closer.
For OPTEL GROUP and many others in the Innovation Supercluster Initiative (more on that later), major focus is being placed on traceability and intelligent supply chains.