实际上，这种现象在宇宙中很普遍，图中南天星座波江座(河流星座)河岸中这醒目的一对相互作用星系就是例子。
In fact, the practice is common in the universe and illustrated by this striking pair of interacting galaxies from the Banks of the southern constellation Eridanus (the River).
在画面最右侧的部分略微有所压缩，好让你能看到背景上引人注目的相互作用的一对星系。
The frame at the far right has been compressed slightly to bring into view an intriguing interacting pair of background galaxies.
相互作用的两个星系相距数万光年。
The two interacting galaxies are separated from each other by tens of thousands of light-years.
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