supercluster

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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).

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.
References in periodicals archive ?
The Local Group is part of a larger body called the Local Supercluster.
The Public Pension Agency (PPA), an entity within KSA's Ministry of Finance, has announced the successful implementation of Oracle SuperCluster.
Green Bank Telescope observations have played a significant role in the research leading to this new understanding of the limits and relationships among a number of superclusters," said Tully.
He said that they are going to use it on a bunch of scales to observe the components within the supercluster and outline other adjacent superclusters.
Tremblay's team discovered the bizarre string of stellar superclusters by chance, while reviewing images as they came in from Hubble.
The filament is the first structure of its kind spied in a critical era of cosmic build-up when colossal collections of galaxies called superclusters began to take shape.
Be warned: if you are freaked out by ideas of filaments of superclusters and the possibilities of a "multiverse," the inter-relations between modern humans takes some beating, too.
To meet the Skoda technical computing department's ever-growing computer technology needs, SGI has provided an open and flexible solution that includes an SGI(R) Altix(R) 3000 supercluster powered by 96 Intel(R) Itanium(R) 2 processors and 192GB memory.
has announced that Japan's Institute of Statistical Mathematics will embark on a new generation of scientific and sociological research with an SGI(R) Altix(TM) 3000 supercluster driven by 256 Intel(R) Itanium(R) 2 processors.
The SGI Altix 3000 family of servers and superclusters combines SGI supercomputing architecture with Intel Itanium 2 processors and the Linux operating system.
By focusing on the needs of users in these markets, SGI and the Linux community have worked together to catapult Linux into the once cost-prohibitive realm of supercomputers and superclusters.
During their long journey, photons from the microwave background encounter huge concentrations of matter, such as superclusters of galaxies.