What age is the universe?

Observing the movement of the most distant galaxies, scientists have learned with what speed the universe expands. This made it possible to calculate how much time it took for objects in the universe to break into the distances that are now dividing them. Thus it was calculated that the age of the universe - from 13 to 15 billion years. A simple study of ball clusters suggests that the age of some stars in our galaxy is over 18 billion years old.

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