Local Sheet
A portion of the Local Sheet, the Council of Giants, on the top view within 10 million light-years from Earth, including theLocal Group and other nearby giant galaxies.
Observation data (EpochJ2000)
Number of galaxies	14 (giant galaxies)[1]
Parent structure	Local Volume[1]
Major axis	33.9 Mly (10.4 Mpc)[1]
Minor axis	1.52 Mly (0.465 Mpc)[1]
Velocity dispersion	47 km/s[1]
Distance	420,700 ly (129 kpc) (center)[1]
ICM temperature	7.3×105 K[1]
Binding mass	1.6×1013[1] M☉
Other designations
Local Street, Coma–Sculptor Cloud[1]

TheLocal Sheet or theComa–Sculptor Cloud is a nearbygalaxy filament and an extragalactic region of space where theMilky Way, the members of theLocal Group, and othergalaxies share a similarpeculiar velocity.^[2] This region lies within a diameter of about 10.4megaparsecs (34 millionlight-years; 3.2×10²⁰kilometres), 465kiloparsecs (1.52 millionlight-years; 1.43×10¹⁹kilometres) thick,^[1] and galaxies beyond that distance show markedly different velocities.^[3] The Local Group has only a relatively small peculiar velocity of66 km⋅s⁻¹ with respect to the Local Sheet. Typical velocity dispersion of galaxies is only40 km⋅s⁻¹ in the radial direction.^[2] Nearly all nearby bright galaxies belong to the Local Sheet.^[4] The Local Sheet is part of theLocal Volume and is in theVirgo Supercluster (Local Supercluster).^[1] The Local Sheet forms a wall of galaxies delineating one boundary of theLocal Void.^[5]

A significant component of the mean velocity of the galaxies in the Local Sheet appears as the result of thegravitational attraction of theVirgo Cluster of galaxies, resulting in a peculiar motion ~185 km⋅s⁻¹ toward the cluster.^[2] A second component is directed away from the center of theLocal Void; an expanding region of space spanning an estimated 45 Mpc (150 Mly) that is only sparsely populated with galaxies.^[3] This component has a velocity of259 km⋅s⁻¹.^[2] The Local Sheet is inclined 8° from theLocal Supercluster (Virgo Supercluster).^[1]

The so-calledCouncil of Giants is a ring of twelve large galaxies surrounding the Local Group in the Local Sheet, with a radius of 3.746 Mpc (12.22 Mly) and its center located at 810 kpc (2.6 Mly) away from theSun.^[1] Ten of these arespirals, while the remaining two areellipticals. The two ellipticals (Maffei 1 andCentaurus A) lie on opposite sides of the Local Group.

* The mass is given as the logarithm (base unspecified) of the mass insolar masses.

The Local Sheet is the co-moving part of the Coma-Sculptor Cloud,^[6] which was identified and described in 1987 by astronomerBrent Tully with colleagueRichard Fisher in his bookThe Nearby Galaxies Atlas asCloud 14.^[7] It is a huge 10 Mpc (33 Mly) prolate,^[8] filament^{[9][10][2][8]} and is mostly host to late-type galaxies, in contrast to theVirgo Cluster, in which more than half of the giant galaxies are early-type galaxies.^[11]

Tully maintains that the Coma-Sculptor Cloud and the Local Sheet do not quite overlap,^[2] as the Local Sheet comprises only the co-moving part of the Coma-Sculptor Cloud.^[6] McCall considers the two terms synonymous, referring to one and the same region.^[1]

• Supergalactic coordinate system, the coordinate system taking the Local Sheet, the Supergalactic Plane, as its X–Y bases

• Local Sheet
• Galaxy superclusters
• Large-scale structure of the cosmos

• Articles with short description
• Short description is different from Wikidata