How did astronomers count how old the universe was 13.7 years old???

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asked Mar 28, 2020 140k views

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Ivan Chau · Answer 1 · 2020-04-02T09:43:19+0000

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A 2013 map of the background radiation left over from the Big Bang, taken by the ESA's Planck spacecraft, captured the oldest light in the universe. This information helps astronomers determine the age of the universe. ... According to research, the universe is approximately 13.8 billion years old.

How did astronomers count how old the universe was 13.7 years old???

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How did astronomers count how old the universe was 13.7 years old???