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夏夜的星空格外璀璨。不过,你有没有发现,在漫天繁星中有些奇怪的白色云雾状天体。这些“白云”到底是什么?是星云吗?
Summer night sky extra bright. However, you have not found that there are some strange white cloud-like objects in the sky. What are these “white clouds” and the nebula?