Perseus–Pegasus Filament

The Perseus–Pegasus Filament is a galaxy filament containing the Perseus–Pisces Supercluster and stretching for roughly a billion light-years (or over 300/h Mpc). Currently, it is considered to be one of the largest known structures in the universe.^{[note 1]} This filament is adjacent to the Pisces–Cetus Supercluster Complex.^[1][2]

Discovery

The Perseus–Pegasus Filament was discovered by David Batuski and Jack Burns of New Mexico State University in 1985.^[2] It is likely that Clyde W. Tombaugh, of the Lowell Observatory, discovered its existence in 1936 while conducting his search for trans-Saturnian planets. He reported it as the Great Perseus-Andromeda stratum of Extra-Galactic Nebulae.^[3] Earlier still, parts of this clustering had been reported by Walter E. Bernheimer [de].^[4]

See also

• Abell catalogue
• Large-scale structure of the universe
• Galaxy filament
• Supercluster
• Big Ring

Notes

1. The reference cited claims the Perseus-Pisces Filament as the largest known structure in the universe. However, various reports cite the Hercules–Corona Borealis Great Wall as the largest at 10,000,000,000 light-years (3.1×10⁹ pc) across.