The Hercules Superclusters ( SCl 160 ) refers to a set of two nearby superclusters of galaxies .
4-506: Relative to other local superclusters, Hercules is considered particularly large, being approximately 330 Mly in diameter. The Northern Local Supervoid lies in front of the superclusters, and is as big as the superclusters themselves. The redshifts of the member galaxies lie between 0.0304 and 0.0414. The region includes Abell 2147 , Abell 2151 (Hercules Cluster), and Abell 2152 galaxy clusters . An extremely long filament of galaxies has been found, that connects this group of clusters to
8-507: A supercluster in that region. However, this was not confirmed until the 1970s. In 1976, Massimo Tarenghi suggested that the A2151 cluster was part of a single supercluster, and at a conference in Estonia in 1977, he, together with several other astronomers, presented evidence that it was indeed a supercluster that appeared in that region. Northern Local Supervoid The Northern Local Supervoid
12-470: Is a region of space devoid of rich clusters of galaxies , known as a void . It is the closest supervoid and is located between the Virgo (Local), Coma and Hercules superclusters . On the sky, it is located between Boötes , Virgo , and Serpens Caput constellations . It contains a few small galaxies (primarily spirals ) and galaxy clusters, but is mostly empty. The faint galaxies within this void divide
16-564: The Abell 2197 and Abell 2199 pair. Abell 2162 in the nearby constellation Corona Borealis is also a member. The Hercules Superclusters are near the Coma Supercluster , helping make up part of the CfA2 Great Wall . In the 1930s, Harlow Shapley studied the structure of the distribution of galaxies in the constellation of Hercules , and was probably first to discover the existence of
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