NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster.

NGC2818是银河系中少数几个位于疏散星团内部的行星状星云之一。

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NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster.

NGC2818是银河系中少数几个位于疏散星团内部的行星状星云之一。

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