Editing Virgo Supercluster (section)

==Structure==
In 1982, [[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 supercluster's luminous galaxies, and a roughly spherical halo containing the remaining third.<ref name="hu06">
{{cite journal
 | author = Hu, F. X.
 | display-authors = etal
 | title = Orientation of Galaxies in the Local Supercluster: A Review
 | journal = Astrophysics and Space Science
 | date = April 2006
 | volume = 302
 | issue = 1–4
 | pages = 43–59
 | bibcode = 2006Ap&SS.302...43H
 | doi = 10.1007/s10509-005-9006-7
 | arxiv = astro-ph/0508669
| s2cid = 18837475
 }}</ref>
The disk itself is a thin (~1 [[Parsec|Mpc]]) ellipsoid with a long axis / short axis ratio of at least 6 to 1, and possibly as high as 9 to 1.<ref name="tully82">
{{cite journal
 | author = Tully, R. B.
 | title = The Local Supercluster
 | journal = Astrophysical Journal
 | date = 15 Jun 1982
 | volume = 257
 | issue = 1
 | pages = 389–422
 | bibcode = 1982ApJ...257..389T
 | doi = 10.1086/159999
| doi-access = free
 }}</ref>
Data released in June 2003 from the 5-year [[2dF Galaxy Redshift Survey|Two-degree-Field Galaxy Redshift Survey (2dF)]] has allowed astronomers to compare the LS to other superclusters. The LS represents a typical poor (that is, lacking a high density core) supercluster of rather small size. It has one rich galaxy cluster in the center, surrounded by filaments of galaxies and poor groups.<ref name="ein07">
{{cite journal
 | author = Einasto, M.
 | display-authors = etal
 | title = The richest superclusters. I. Morphology
 | journal = Astronomy and Astrophysics
 | date = December 2007
 | volume = 476
 | issue = 2
 | pages = 697–711
 | bibcode = 2007A&A...476..697E
 | doi = 10.1051/0004-6361:20078037
|arxiv = 0706.1122 | s2cid = 15004251
 }}</ref> 

The [[Local Group]] is located on the outskirts of the LS in a small filament extending from the [[Fornax Cluster]] to the [[Virgo Cluster]].<ref name="klypin03" /> The Virgo Supercluster's volume is roughly 7,000 times that of the Local Group, or 100 billion times that of the Milky Way.