Age of the universe, the age we get is less than the Hubble time
Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall
The universe is thought to be 13.77 billion years old. The distances and radial velocities of other galaxies, the majority of which are eclipsing our own at speeds proportionate to their distances, are used to determine this age.
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