This nebula is a bubble, and it's a bubble because intense blasts of stellar wind and radiation for a nearby star have cut through the dust and hollowed out the middle.

此星云呈泡沫状，之所以如此，是因为附近一颗恒星发生剧烈爆炸，产生的辐射和恒星风从尘埃云中间穿过，掏空了中间部位。

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Now the first two Passed through Luo Jin and Dust Before the Wind have been published.

现在前两部《行过洛津》和《风前尘埃》已经出版。

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