The Southern Supercluster Strand is a galaxy filament that encompasses the Southern Supercluster and the TelescopiumâÂÂGrus Cloud.
In 2014, it was announced that the Southern Supercluster Strand is a lobe in a greater supercluster, Laniakea, that is centered on the Great Attractor. This would mean that the Southern Supercluster Strand's components, the TelescopiumâÂÂGrus Cloud and the Southern Supercluster would be part of this new supercluster. The Virgo Supercluster would also be part of this greater supercluster, thus becoming the local supercluster.
The Southern Supercluster Strand is a galaxy filament that emerges from the Centaurus Cluster. The filament then branches off into two forks, SSCa, and SSCb, also known as the Southern Supercluster and the TelescopiumâÂÂGrus Cloud respectively. The Southern Supercluster is a long major chain of galaxies, consisting of the major Dorado, Fornax, and Eridanus clusters while the TelescopiumâÂÂGrus Cloud is a low density galaxy filament, with no central concentration of galaxies. The TelescopiumâÂÂGrus Cloud along with the Pavo-Indus Supercluster form parts of a wall bounding the Local Void. Likewise, both structures along with the Southern Supercluster also form a wall bounding the Sculptor Void. The Southern Supercluster Srand extends all the way to the PerseusâÂÂPisces Supercluster. The Southern Supercluster Strand, along with the CentaurusâÂÂPuppisâÂÂPP filament, which contains the Antila Wall and both extend to the PerseusâÂÂPisces Supercluster, form a wall bounding the Sculptor Void.
The Cetus-Aries Cloud, is a minor filament that was identified and described in 1987 by astronomer Brent Tully with colleague Richard Fisher in his book The Nearby Galaxies Atlas, and connects the Southern Supercluster with the TelescopiumâÂÂGrus Cloud.
Below is a list of groups in the Cetus-Aries Cloud according to astronomer Brent Tully.
(Sources for data columns:)
Before the Southern Supercluster Strand was identified, its two major components were already known: the Southern Supercluster which was discovered in 1953 by astronomer Gérard de Vaucouleurs, and the TelescopiumâÂÂGrus Cloud which was discovered by astronomer Brent Tully with colleague Richard Fisher in 1987.
In 1987, astronomer Brent Tully with colleague Richard Fisher discovered and described the Cetus-Aries Cloud, a minor filament that connects the Southern Supercluster with the TelescopiumâÂÂGrus Cloud. In 1992, Fouque et al. grouped the Cetus-Aries Cloud, also known as cloud 52 in the book The Nearby Galaxies Atlas along with the Southern Supercluster's three major clusters, the Fornax, Eridanus, and Dorado clusters (clouds 51 and 53).
In 2013, Courtois et al. discovered based on the distribution of galaxies inferred from their redshifts the Southern Supercluster Strand, which branches off into two forks that emerge from the Centaurus Cluster. These two forks were designated SSCa and SSCb, also known as the Southern Supercluster and the TelescopiumâÂÂGrus Cloud. In 2017, Pomarède et al. revealed that the Southern Supercluster strand along with another filament known as the Antlia Strand, extend all the way to the PerseusâÂÂPisces Supercluster.