...sier, 1730∼1817年,译注一)时代所使用的小口径望远镜,对这些夜空深处的天体,除了可把几个显著的 散开星团 ( open cluster )分辨出一颗颗的星以外,其他的,看来只不过是一些蒙眬的光斑而已。
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沿着此线大约三分之一处,你会发现一个模糊的物体,它的名称为M 50,是个散开星团。
About a third of the way along this line, you'll find a hazy object, an open star cluster, called M50.
但最近的研究表明,这片星团的年龄只有1亿年——如果这是遗留下来的尘埃,那应该早就弥散开了。
But later studies found the cluster to be about 100 million years old — any dust left over from its formation would have dissipated long ago.
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