TheGreat Walls are the largest known structures in theuniverse. They are based on data set mapping ofgamma-ray bursts (GRBs). The mapping found an unusually high concentration of similarly distanced GRBs in certain areas.[1][2]
Structures larger than 1,200,000,000 light years are incompatible with thecosmological principle according to all estimates.
| Structure name (year discovered) | Maximum dimension (inlight years) | Notes |
|---|---|---|
| Hercules-Corona Borealis Great Wall (2014)[3] | 10,000,000,000[1][2][4] | Discovered throughgamma-ray burst mapping, and is the first structure to exceed 10 billion light years. |
| Giant GRB Ring (2015)[5] | 5,600,000,000[5] | Discovered through gamma-ray burst mapping. Largest known regular formation in the observable Universe.[5] |
| Huge-LQG (2012-2013) | 4,000,000,000[6][7][8] | Decoupling of 73 quasars. Largest known large quasar group and the first structure found to exceed 3 billion light years. |
| U1.11 LQG (2011) | 2,500,000,000 | Involves 38 quasars. Adjacent to the Clowes-Campusano LQG. |
| Clowes-Campusano LQG (1991) | 2,000,000,000 | Grouping of 34 quasars. Discovered by Roger Clowes and Luis Campusano. |
| Sloan Great Wall (2003) | 1,370,000,000 | Discovered through the2dF Galaxy Redshift Survey and theSloan Digital Sky Survey. |
| Pisces-Cetus Supercluster Complex (1987) | 1,000,000,000 | Contains the Milky Way, and is the first galaxy filament to be discovered. (The firstLQG was found earlier in 1982.) A new report in 2014 confirms the Milky Way as a member of Laniakea Supercluster. |
| CfA2 Great Wall (1989) | 750,000,000 | Also known as theComa Wall |
| Laniakea Supercluster (2014) | 520,000,000 | Galaxy supercluster in which theEarth is located |
| Horologium Supercluster (2005) | 550,000,000 | Also known asHorologium-Reticulum Supercluster. |