Not yet ruled out by observation. H 0 is not known very accurately either. In cosmology, Newton's theory of gravity must be replaced with Einstein's theory of gravity, general relativity. In general relativity, the bending of the path of objects by gravitational forces is described as being due to the curvature of space. The results are summarized in the graph to the right.
Recent results appear to favor values near the border between the purple and yellow areas.
However, the observed uniformity of the microwave background radiation is too small for the fluctuations to have formed the galaxies in the amount of time they had. Return to table of contents. This document was last updated September 1, 1999.