Extended halo of NGC 2682 (M 67)
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NGC 2682 is a nearby open cluster that is approximately 3.5Gyr old. Dynamically, most open clusters are expected to dissolve on shorter timescales of ~=1Gyr. That it has...
NGC 2682是一个邻近的疏散星团，年龄约为35亿年（3.5Gyr）。从动力学角度来看，绝大多数疏散星团预计会在约10亿年（~1Gyr）的更短时间尺度内瓦解。其拥有……
