对于双重星系，把较大的叫做主星系，较小的称为伴星系。
在左侧有模糊的蓝点，正好处于旋臂之间，它是一个伴星系。
The fuzzy blue dot to the left, which appears to fit snugly between the arms, is a companion galaxy.
虽然看上去NGC 1097已经把它的伴星系卷入旋臂中，但这可不是庞大的慈母怀抱。
Although NGC 1097 seems to be wrapping its companion in its spiral arms, this is no gentle motherly giant.
这个“死亡的恒星星系”将制造出大量的高能射线，而这些射线能导致对任何位于同伴星系内并处于发射物路径中的行星大气层的严重破坏。
This "death star galaxy" will produce large amounts of high-energy radiation, which may cause severe damage to the atmospheres of any planets in the companion galaxy that lie in the path of the jet.
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