Redshift quantization was posited by Tifft after he created the first 3D redshift pie chart from observations of this structure, though it was later determined that the line of sight from the earth to this structure contains the first discovered void.
Gunn and Gott used this structure's X-ray luminosity to put limits on the deceleration parameter and explained its growth using their theory of infall; that paper was the first to use ram-pressure stripping to explain the distribution of its constituents. Redshift quantization was posited by Tifft after he created the first 3D redshift pie chart from observations of this structure, though it was later determined that the line of sight from the earth to this structure contains the first discovered void. This structure contains two gigantic elliptical galaxies, NGC 4889 and NGC 4874 and is located in an asterism called Berenice's (*) Hair. This structure is at the center of, and sometimes names, a structure which includes the Leo Cluster and the Hercules Supercluster, called the Cfa2 Great Wall. When adding up the mass of constituents of this object from luminosity and from their velocities using the virial theorem, Zwicky found that up to 90% of its mass was invisible, leading him to posit the existence of dark matter. For 10 points, name this oft-studied galaxy cluster.
Gunn and Gott used this structure's X-ray luminosity to put limits on the deceleration parameter and explained its growth using their theory of infall; that paper was the first to use ram-pressure stripping to explain the distribution of its constituents.
Coma cluster [or Abell 1656]