Galaxy Superclusters: Supercluster, Virgo Supercluster, Shapley Supercluster, Hydra-Centaurus Supercluster, Horologium Supercluster Books LLC

ISBN: 9781156837276

Published: May 25th 2010

Paperback

34 pages


Description

Galaxy Superclusters: Supercluster, Virgo Supercluster, Shapley Supercluster, Hydra-Centaurus Supercluster, Horologium Supercluster  by  Books LLC

Galaxy Superclusters: Supercluster, Virgo Supercluster, Shapley Supercluster, Hydra-Centaurus Supercluster, Horologium Supercluster by Books LLC
May 25th 2010 | Paperback | PDF, EPUB, FB2, DjVu, audiobook, mp3, RTF | 34 pages | ISBN: 9781156837276 | 8.41 Mb

Chapters: Supercluster, Virgo Supercluster, Shapley Supercluster, Hydra-Centaurus Supercluster, Horologium Supercluster, Perseus-Pisces Supercluster, Coma Supercluster, Pavo-Indus Supercluster. Source: Wikipedia. Pages: 32. Not illustrated. FreeMoreChapters: Supercluster, Virgo Supercluster, Shapley Supercluster, Hydra-Centaurus Supercluster, Horologium Supercluster, Perseus-Pisces Supercluster, Coma Supercluster, Pavo-Indus Supercluster. Source: Wikipedia. Pages: 32. Not illustrated. Free updates online. Purchase includes a free trial membership in the publishers book club where you can select from more than a million books without charge.

Excerpt: The Virgo Supercluster (Virgo SC) or Local Supercluster (LSC or LS) is the irregular supercluster that contains the Local Group, which in turn contains the Milky Way and Andromeda galaxies. At least 100 galaxy groups and clusters are located within its diameter of 33 megaparsecs (110 million light-years). It is one of millions of superclusters in the observable Universe. Beginning with the first large sample of nebulae published by William and John Herschel in 1863, it was known that there is a marked excess of nebular fields in the constellation Virgo (near the north galactic pole).

In the 1950s French-American astronomer Gerard Henri de Vaucouleurs was the first to argue that this excess represented a large-scale galaxy-like structure, coining the term Local Supergalaxy in 1953 which he changed to Local Supercluster (LSC) in 1958. (Harlow Shapley, in his 1959 book Of Stars and Men, suggested the term Metagalaxy.) Debate went on during the 1960s and 1970s as to whether the Local Supercluster (LS) was actually a structure or a chance alignment of galaxies.

The issue was resolved with the large redshift surveys of the late 70s and early 80s, which convincingly showed the flattened concentration of galaxies along the supergalactic plane. In a comprehensive 1982 paper, R. Brent Tully presented the conclusions of his research concerning the basic structure of the LS. It consists of two components: an appreciably flattened disk containing two-thirds of the superclusters luminous galaxies, and a roughly spherical halo co...More: http: //booksllc.net/?id=17743



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