Abstract
THERE is growing evidence that the Hubble constant is of the order of 100 km s−1 Mpc−1, rather than only half as great1. The purpose of this paper is to discuss the Friedman models that are consistent with such a large expansion rate, as well as with current estimates of stellar ages and the density of the Universe. If one accepts estimates of at least 100km s−1 Mpc−1 for the Hubble constant, and that globular clusters have ages of the order of 16,000 Myr, then the only possible Friedman models of the Universe are those with a positive cosmological constant and q0 < −1. Various independent tests of this conclusion are suggested.
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TINSLEY, B. Accelerating Universe revisited. Nature 273, 208–211 (1978). https://doi.org/10.1038/273208a0
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DOI: https://doi.org/10.1038/273208a0
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