The cluster of galaxies Abell 2218 is itself about three billion light-years away in the northern constellation of the Dragon (Draco).
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).
星系团阿贝尔2218自身约在30亿光年远，在北天星座天龙座。
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