星系团阿贝尔2218自身约在30亿光年远，在北天星座天龙座。
The cluster of galaxies Abell 2218 is itself about three billion light-years away in the northern constellation of the Dragon (Draco).
天龙座三剑客虽然并不像其他紧密星系群那麽出名，不过它们在视觉上的强烈对比，让它们成为天文摄影爱好者常常拍摄的对象之一。
Not as well known as other tight groupings of galaxies, the contrast in visual appearance makes this triplet an attractive subject for astrophotographers.
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