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The Age of the Universe (2)
In most cosmological models based on general relativity and the Cosmological Principle, the age of the universe can be computed once one decides on the values of the five cosmological parameters. Actually, since there are two equations relating them, only three must be assumed or, preferably, measured. Below are the results of calculations with a few assumed values for the density parameter, the cosmological constant, and the Hubble constant. Note that there are other models in which the age is infinite, and note also that it is not justified to apply general relativity before the Planck time.
Ages are in Gyr (billion years).
Hubble constants are in (km/s)/Mpc.
The Age of the Universe: 1 2
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