The overall shape of the expanding gas is flattened, like a beach ball someone sat on.

这团膨胀气体整体的形状是扁平的，就像被人坐着的沙滩球。

That usually happens when a gas cloud is expanding, like in a planetary nebula or supernova.

这通常发生在气体云膨胀时，比如行星状星云或超新星。

The expanding gas piles up like snow in a snowplow, getting denser and glowing more brightly.

膨胀的气体像扫雪机里的雪一样堆积起来，变得更加密集，并发出更加明亮的光芒。

An entire star tears itself to shreds, and the expanding gas blasts outward at 10% the speed of light.

整个恒星会将自己撕成碎片，膨胀的气体以10%的光速向外爆炸。

And that expanding gas inside the whale can build up to around two to three atmospheres of pressure!

鲸鱼体内不断膨胀的气体可以产生大约两到三个大气压的压力！

One of my favorite nebulae in the sky is Barnard's Loop, a huge arc of material that's formed either by the expanding gas from supernovae or the winds of all the massive stars being born in the Orion complex.

天空中我最喜欢的一个星云是巴纳德环，一个由物质组成的巨大弧形，它要么是由超新星膨胀的气体形成的，要么是由猎户座复合体中诞生的所有大质量恒星的风形成的。