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Segue 3: the youngest globular cluster in the outer halo
(Oxford University PressOxford, 2013)
Deep Galileo (Telescopio Nazionale Galileo) B, V and I images of Segue 3, reaching V ∼ 25, reveal that it is the youngest globular cluster known so far in the Galaxy. A young age of 3.2 Gyr is found, differently from a ...