In Big Bang models of physical cosmology, the age of the universe is the cosmological time back to the point when the scale factor of the universe extrapolates to zero. The age is about 13.8 billion years, with the latest models estimating it more precisely as 13.787 billion years.
In Big Bang models of physical cosmology, the age of the universe is the cosmological time back to the point when the scale factor of the universe extrapolates to zero. The age is about 13.8 billion years, with the latest models estimating it more precisely as 13.787 billion years.
Source: Wikipedia "Age of the universe" · CC BY-SA 4.0
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