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Fig. 4
Comparison between the HRDs of 47 Tuc (NGC 104, Age = 12.75 Gyr, [Fe/H] = −0.72), one of the most metal-rich globular clusters (magenta dots), and M 67 (NGC 2682, Age = 3.47 Gyr, [Fe/H] = 0.03), one of the oldestopen clusters (blue dots).
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