This is a list of the largest cosmic structures so far discovered. The unit of measurement used is the light-year (distance traveled by light in one Julian year; approximately 9.46 trillion kilometres).

This list includes superclusters, galaxy filaments and large quasar groups (LQGs). The structures are listed based on their longest dimension.

This list refers only to coupling of matter with defined limits, and not the coupling of matter in general (such as, for example, the cosmic microwave background, which fills the entire universe). All structures in this list are defined as to whether their presiding limits have been identified.

There are some reasons to be cautious about this list:

The Zone of Avoidance, or the part of the sky occupied by the Milky Way, blocks out light from several structures, making their limits imprecisely identified. Some structures are too distant to be seen even with the most powerful telescopes. Some structures have no defined limits, or endpoints. All structures are believed to be part of the cosmic web. Many structures are overlapped by nearby galaxies, creating a problem of how to carefully define the structure's limit. Interpreting the observational data requires assumptions about gravitational lensing, redshift, etc.__TOC__

List of largest structures

+List of the largest cosmic structures Structure name(year discovered) Maximum dimension(in light-years)Notes Hercules–Corona Borealis Great Wall (2014) 15,000,000,000–10,000,000,000–9,700,000,000 Discovered through gamma-ray burst mapping. Existence as a structure is disputed. Giant GRB Ring (2015) 5,600,000,000 Discovered through gamma-ray burst mapping. Largest-known regular formation in the observable universe. Huge-LQG (2012–2013) 4,000,000,000 Decoupling of 73 quasars. Largest-known large quasar group and the first structure found to exceed 3 billion light-years.Giant Arc (2021) 3,300,000,000 Located 9.2 billion light years away. 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.Quipu (2025)1,400,000,000Named after a Andean recordkeeping system, adjacent to where it was discovered. It has a long spine-like shape, branching with clusters. It is widely regarded as one of the largest superstructures, but it is disputed whether it is a superstructure or supercluster. Sloan Great Wall (2003) 1,380,000,000 Discovered through the 2dF Galaxy Redshift Survey and the Sloan Digital Sky Survey. South Pole Wall (2020) 1,370,000,000 The largest contiguous feature in the local volume and comparable to the Sloan Great Wall (see above) at half the distance. It is located at the celestial South Pole. King Ghidorah Supercluster (2022) 1,300,000,000 Consists of at least 15 clusters plus other interconnected filaments. It is the most massive galaxy supercluster discovered so far.Big Ring (2024)1,300,000,000Made up of galaxy clusters. (Theoretical limit) 1,200,000,000 Structures larger than this size are incompatible with the cosmological principle according to all estimates. However, whether the existence of these structures itself constitutes a refutation of the cosmological principle is still unclear.Ho'oleilana Bubble (2023)1,000,000,000Contains about 56,000 galaxies, located 820 million light years away. BOSS Great Wall (BGW) (2016) 1,000,000,000 Structure consisting of 4 superclusters of galaxies. The mass and volume exceeds the amount of the Sloan Great Wall. Perseus–Pegasus Filament (1985) 1,000,000,000 This galaxy filament contains the Perseus–Pisces Supercluster. Pisces–Cetus Supercluster Complex (1987) 1,000,000,000 Contains the Milky Way, and is the first galaxy filament to be discovered. (The first LQG was found earlier in 1982.) A new report in 2014 confirms the Milky Way as a member of the Laniakea Supercluster. CfA2 Great Wall (1989) 750,000,000 Also known as the Coma Wall. Saraswati Supercluster 652,000,000 The Saraswati Supercluster consists of 43 massive galaxy clusters, which include Abell 2361 and ZWCl 2341.1+0000. Boötes Supercluster 620,000,000 Horologium-Reticulum Supercluster (2005) 550,000,000 Also known as the Horologium Supercluster. Laniakea Supercluster (2014) 520,000,000 Galaxy supercluster in which Earth is located. Komberg–Kravtsov–Lukash LQG 11 500,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Hyperion proto-supercluster (2018) 489,000,000 The largest and earliest known proto– supercluster. Komberg–Kravtsov–Lukash LQG 12 480,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Newman LQG (U1.54) 450,000,000 Discovered Peter R Newman et al. Komberg–Kravtsov–Lukash LQG 5 430,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Tesch–Engels LQG 420,000,000 The first LGQ to be discovered with lasers and rays. Shapley Supercluster 400,000,000 First identified by Harlow Shapley as a cloud of galaxies in 1930, it was not identified as a structure until 1989. Komberg–Kravstov–Lukash LQG 3 390,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. U1.90 380,000,000 Lynx–Ursa Major Filament (LUM Filament) 370,000,000 Sculptor Wall 370,000,000 Also known as the Southern Great Wall. Einasto Supercluster 360,000,000 Pisces-Cetus Supercluster 350,000,000 Komberg–Kravtsov–Lukash LQG 2 350,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. z=2.38 filament around protocluster ClG J2143-4423 330,000,000 Webster LQG 320,000,000 First LQG (Large Quasar Group) discovered.R. G. Clowes. "Large Quasar Groups – A Short Review". 'The New Era of Wide Field Astronomy', ASP Conference Series, Vol. 232. 2001; Astronomical Society of the Pacific; ; . Komberg–Kravtsov–Lukash LQG 8 310,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Komberg–Kravtsov–Lukash LQG 1 280,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Komberg–Kravtsov–Lukash LQG 6 260,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. Komberg–Kravtsov–Lukash LQG 7 250,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. SCL @ 1338+27 228,314,341 One of the most distant known superclusters.Pavo–Indus Supercluster215,000,000Contains the Pavo Cluster, a key gravitational anchor. Komberg–Kravtsov–Lukash LQG 9 200,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash. SSA22 Protocluster 200,000,000 Giant collection of Lyman-alpha blobs. Ursa Major Supercluster 200,000,000 Komberg-Kravtsov-Lukash LQG 10 180,000,000 Discovered by Boris V. Komberg, Andrey V. Kravstov and Vladimir N. Lukash.Telescopium−Grus Cloud163,812,936A large low-density filament, containing 24 Galaxy clusters.Hydra–Centaurus Supercluster150,000,000It contains the Hydra Cluster, which has high proportions of Dark Matter, whereas the Centaurus Supercluster is a extremely rich.Southern Supercluster134,000,000It extends from the Cetus to Dorado constellations. Virgo Supercluster 110,000,000 A part of the Laniakea Supercluster (see above). It also contains the Milky Way Galaxy, which contains the Solar System where Earth orbits the Sun.Listed here for reference.Southern Supercluster Strand102,000,000A filament, part of the Southern Supercluster, connecting it to the Telescopium-Grus Cloud.Hydra Supercluster100,000,000A elongated supercluster, residing in the Hydra–Centaurus Supercluster, it is one of the closest superclusters to Virgo Supercluster (see above).

List of largest voids

Voids are immense spaces between galaxy filaments and other large-scale structures. Technically they are not structures. They are vast spaces which contain very few or no galaxies. They are theorized to be caused by quantum fluctuations during the early formation of the universe.

A list of the largest voids so far discovered is below. Each is ranked according to its longest dimension.