The mean mass density of the Universe
Abstract
Observations of galaxy clustering indicate that the mean mass density is only about one-third of that predicted by the popular Einstein-de Sitter cosmological model. Theory and observation can be reconciled if there has been large-scale segregation of galaxies from mass, but the gravitational instability of the expanding universe would tend to destroy such a segregation. Thus either conventional ideas about galaxy formation are wrong, or the Einstein-de Sitter model is not a useful approximation.
- Publication:
-
Nature
- Pub Date:
- May 1986
- DOI:
- 10.1038/321027a0
- Bibcode:
- 1986Natur.321...27P
- Keywords:
-
- Astronomical Models;
- Density Distribution;
- Mass Distribution;
- Space Density;
- Universe;
- Big Bang Cosmology;
- Galactic Clusters;
- Gravitational Fields;
- Astrophysics