Key points are not available for this paper at this time.
For decades, the determination of the mean density of matter (OmegaM) has been tied to the distribution of light. This has led to a ``bias, '' perhaps as large as a factor of 2, in determining a key cosmological parameter. Recent measurements of the physical properties of clusters, cosmic microwave background (CMB) anisotropy and the power spectrum of mass inhomogeneity now allow a determination of OmegaM without ``visual bias. '' The early data lead to a consistent picture of the matter and baryon densities, with OmegaB = 0. 039 +/- 0. 0075 and OmegaM = 0. 33 +/- 0. 035.
Michael S. Turner (Mon,) studied this question.