This oxygen glows green, giving planetaries their characteristic hue.

这种氧气会发出绿色的光，赋予行星特有的色调。

Clearly, there's more to planetaries than meets the eye.

显然，行星远不止我们看到的那么简单。

If the wind from a star blows off in a sphere, how can planetaries come in all these fantastic shapes?

如果来自恒星的风是在一个球体中吹出的，那么行星是如何形成这些奇异的形状的呢？

I suspect this is why we see so many weird and fantastic shapes in planetaries: their progenitor stars swallowed their planets.

它们的祖先恒星吞噬了它们的行星。

Many planetaries (as we call them for short) , are round and look like soap bubbles, pretty much what you expect when you look at an expanding shell of gas.

许多行星(我们就这么简称了)是圆的，看起来像肥皂泡，和你所预料的膨胀的气体外壳差不多。

Like using a whisk to beat eggs, the planets inside the star would spin it up, causing it to rotate faster… fast enough to explain the shapes of planetaries.

就像用搅拌器打鸡蛋一样，恒星内部的行星会使它旋转起来，使它旋转得更快… … 快到足以形成这种行星的形状。

When the Sun becomes a white dwarf, it most likely won't be energetic enough to make the surrounding gas glow: most planetaries start off as stars more massive and hotter than the Sun.

当太阳变成白矮星时，它的能量很可能不足以让周围的气体发光：大多数行星一开始都是比太阳更大更热的恒星。