复数： nebulas nebulae

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How was the unusual red rectangle nebula created ?

这个不寻常的红色矩形星云是怎么形成的？

This image of reflection nebula dg 129 was released september 21 .

这张反射星云（reflectionnebula）dg129的照片发布于9月21日。

Like its mythological namesake , the nebula is associated with a dramatic transformation .

如它的希腊神话同名者，星云与一戏剧性的变化相关。

Radiation from hot , young stars has slowly eroded the nebula over millions of years .

数百万年来炎热的年轻恒星发出的辐射不断的侵蚀着这个星云。

Also known as m8 , the nebula is a star-forming region in the constellation sagittarius .

泻湖星云也被称为m8，它是人马座中的恒星形成区域。