Dark Matter in the Universe?
We have seen that there is dark matter both in clusters of galaxies and in individual galaxies. But galaxies are part of the overall universe. Does this mean there is a dark matter problem there also? There is, indeed, an enigma in relation to the universe, but it may or may not be related to the dark matter of galaxies. Some of the universe’s matter appears to be missing, so in this case we may have a real missing mass problem. In the case of galaxies and clusters the mass isn’t missing; we have strong evidence that it’s there. We just don’t know what form it takes.
KeywordsDark Matter Critical Density Grand Unify Theory Escape Velocity Closed Universe
Unable to display preview. Download preview PDF.
- * Applegate, James; Hogan, Craig, and Scherrer, Robert, “Cosmological Baryon Diffusion and Nucleosynthesis.” Physical Review D (February, 1987) 1151.Google Scholar
- Burns, Jack, “Dark Matter in the Universe.” Sky and Telescope (November, 1984) 397.Google Scholar
- Disney, Michael, The Hidden Universe (New York: Macmillan, 1984).Google Scholar
- Harrison, Edward, Cosmology (London: Cambridge University Press, 1981).Google Scholar
- Kaufmann, William, Relativity and Cosmology (New York: Harper & Row, 1973).Google Scholar
- Parker, Barry, “The Missing Mass Mystery.” Astronomy (November, 1984) 6.Google Scholar