Critical Density

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Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke4807.&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 4807. Bristol: Institute of Physics Publishing, 2001

Mathematics

Logic

Cosmology, Cosmological Models And Concepts

Scientific paper

The mean density of a universe which is just capable of expanding forever. In such a universe (an Einstein-de Sitter universe) the rate of expansion is slowed by gravity and approaches ever closer to zero. If the mean density exceeds the critical value, the expansion will cease at a finite time in the future and the universe thereafter will begin to collapse. If the mean density is less than the ...

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