First-generation and second-generation stars in the globular cluster M5 rotate on the plane of the sky with measurably different patterns, while the other surveyed clusters show no significant rotation.
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Kinematics of Multiple Stellar Populations in Globular Clusters with Gaia
First-generation and second-generation stars in the globular cluster M5 rotate on the plane of the sky with measurably different patterns, while the other surveyed clusters show no significant rotation.