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How do astronomers know the age of the planets and stars?

  • Written by Adam Burgasser, Professor of Astronomy & Astrophysics, University of California, San Diego
How do astronomers know the age of the planets and stars?Astronomers can estimate ages for stars outside the Solar System, but not planets.Corbis Historical via Getty ImagesHow do astronomers know the age of the planets and stars?

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How do we know the age of the planets and stars? – Swara D., age 13,...

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