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Stellar clocks

A link between rotation and age for Sun-like stars has long been known, but a stringent test of it for older stars has been lacking. The Kepler mission helps to fill this gap with observations of an old star cluster. See Letter p.589

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Correspondence to David Soderblom.

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Soderblom, D. Stellar clocks. Nature 517, 557–558 (2015).

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