The measured Hubble time would give the Einstein-de Sitter agewhich is less than the measured age of stars that must themselves be younger than the universe. The measurements are therefore incompatible with an Einstein-de Sitter universe. For the stated spatially flat Lambda-CDM model, direct evaluation of the preceding integral givesand hence . The period of accelerating expansion caused by the cosmological constant therefore allows an age consistent with the stellar lower bound.
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