Astrophysics (Index)About

large scale structure

(LSS, large scale structure of the universe, cosmic web)
(the universe's structure as in placement of clusters)

The large scale structure of the universe, also known as the cosmic web, is the overall placement of mass in the volume of the universe. Clusters are within superclusters, in turn, in surfaces (sheets, walls) and strings (galaxy filaments) separated by large voids. The term large scale structure is also sometimes used to mean one of these elements.

A picture of the general structure began with the 1989 discover of the Great Wall, a sheet of galaxies, part of growing evidence that galaxy clusters are not evenly distributed. Currently, cosmological simulations aim to produce a structure similar to that observed, i.e., show a similar large scale structure. Presumed factors include entropy, pressure, density, and gravitational potential.

The Lyman-alpha forest reveals aspects of the large scale structure, as does the mapping of distant galaxies.

Further reading:

Referenced by pages:
CfA Redshift Survey
cosmic variance
cosmic web
cosmological simulation
Cosmic Evolution Survey (COSMOS)
giant planet formation
gravitational instability model
Great Wall
Hale Telescope
initial fluctuations
intensity mapping
large quasar group (LQG)
Lyman-alpha forest
Sculptor Wall
Sloan Great Wall (SGW)
Zel'dovich approximation