Pisces–Cetus Supercluster Complex

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The Pisces–Cetus Supercluster Complex is a complex of galaxy superclusters or galaxy filament that includes the Virgo Supercluster (the supercluster in which the Local Group, the galaxy cluster that includes the Milky Way, is located).[1]

Discovery[edit]

Astronomer R. Brent Tully of the University of Hawaii’s Institute of Astronomy identified the Complex in 1987.[2]

Extent[edit]

The Pisces–Cetus Supercluster Complex is estimated to be about 1.0 billion light-years long and 150 million light years wide. It is one of the largest structures identified so far in the universe, but is exceeded by the 1.37 billion-light-year long Sloan Great Wall, 2 billion light-year long Clowes–Campusano LQG, 2.2 billion light–year long U1.11 LQG, 4 billion light-year long Huge-LQG, and the 10 billion light-year long Hercules–Corona Borealis Great Wall.

The complex comprises about 60 clusters and is estimated to have a total mass of 1018 M.[3] According to the discoverer, the complex is composed of 5 parts:

  1. The Pisces-Cetus Supercluster
  2. The Perseus-Pegasus chain, including the Perseus-Pisces Supercluster
  3. The Pegasus-Pisces chain
  4. The Sculptor region, including the Sculptor Supercluster and Hercules Supercluster
  5. The Virgo–Hydra-Centaurus Supercluster, which contains our Virgo Supercluster (Local Supercluster) as well as the Hydra-Centaurus Supercluster.[3]

With its mass of 1015 M, our Virgo Supercluster accounts only for 0.1 percent of the total mass of the complex.

The complex was named after the Pisces-Cetus Superclusters, which are its richest superclusters.

Image[edit]

The Pisces-Cetus Supercluster Complex is the very long chain of galaxies from the Pisces-Cetus Superclusters, Sculptor Superclusters, the Perseus-Pisces Supercluster and the Virgo-Hydra-Centaurus Superclusters.


See also[edit]

References[edit]

  1. ^ Tully, R. B. (1986-04-01). "Alignment of clusters and galaxies on scales up to 0.1 C". The Astrophysical Journal 303: 25–38. Bibcode:1986ApJ...303...25T. doi:10.1086/164049. Retrieved 2011-05-03. 
  2. ^ John Noble Wilford (November 10, 1987). "Massive Clusters of Galaxies Defy Concepts of the Universe". New York Times. 
  3. ^ a b Tully, R. Brent (1987-12-01). "More about clustering on a scale of 0.1 C". The Astrophysical Journal 323: 1–18. Bibcode:1987ApJ...323....1T. doi:10.1086/165803. Retrieved 2011-05-03.