"Consistent Rotational Evolution: A Reliable Age Indicator for Open Cluster and Field Stars"
Scientists have established a connection between the rotation rates of stars in star clusters and field stars, allowing for the determination of ages for the latter. This method, known as gyrochronology, measures the rotation period of a star by observing the dips in its brightness caused by dark spots on its surface. By comparing the rotation periods of stars in clusters with their colors, a pattern emerges that can be used to estimate their ages. The study found that this method also works for field stars, providing a reliable way to determine the ages of a larger number of stars.