In fact, these panels show the location (circled) of Swift X-ray detected supermassive black holes in a variety of merging galaxy systems.
事实上，上面的画面显示雨燕X射线天文台在多个星系合并系统中探测到的超大质量黑洞(圆圈)。
That means when the two stars finally get around to merging, they could be far away from the galaxy of their birth — good news, as it happens, for optical confirmation.
这意味着当双星最后融合时，它们将离它们诞生的星系很远——如果这真的发生了，引力波就能在光学上得到确认，这真是个好消息。
Galaxy merging is almost a given.
星系合并几乎是个给定的理论。
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