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The Conversation USA

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

  • Written by Adam Burgasser, Professor of Astronomy & Astrophysics, University of California, San Diego
imageAstronomers can estimate ages for stars outside the Solar System, but not planets.Corbis Historical via Getty Imagesimage

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

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

Read more: How do astronomers know the age of the planets and stars?

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