It is estimated that one-third of the stars in the Milky Way are either binary or part of a multiple-star system.
据估计银河系中三分之一的恒星要么是双星要么是多恒星系统的一部分。
When three or more stars huddle together, it's called a multiple star system.
如果3颗以上的恒星聚集在一起，便形成了所说的多星系统。
In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
事实上，它是一个双星系统，从地球这边看，就是一颗星公转到另一颗星的前面。
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