Dust Shells

A starfield has a large and unusual red and orange nebula in the middle. The nebula seems to contain not only swirls but also nearly transparent shells. Please see the explanation for more detailed information.
星空中央有一片巨大而奇特的红橙色星云。这片星云似乎不仅包含漩涡状结构，还有近乎透明的壳层。有关更多详细信息，请参阅说明。