gravitational clustering

gravitational clustering

[‚grav·ə′tā·shən·əl ′kləs·tə‚riŋ]
(astronomy)
A theory that attributes the hierarchy structure of the universe to growth of density fluctuations in a statistically uniform and isotropic universe.
References in periodicals archive ?
In some sense we're saying that the description of gravitational clustering is incomplete when you use either picture [top-down or bottom-up] in isolation.