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May 11

How to Learn a Star’s True Age

Source: Kepler@NASA


NGC6811. Image credit: Anthony Ayiomamitis.

For many movie stars, their age is a well-kept secret. In space, the same is true of the actual stars. Like our Sun, most stars look almost the same for most of their lives. So how can we tell if a star is one billion or 10 billion years old? Astronomers may have found a solution – measuring the star’s spin.(read more)

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