1.The orion nebula is a special kind of nebula called a stellar nursery.

猎户座云是种特殊云，叫做恒摇篮。

2.Those elements will spread out to become a nebula, a rich chemical cloud drifting through space.

这些物质最后会扩散开来，形成新的云，即大团富含化物质的云团飘逸在宇宙之中。

3.Orion's sword is home to the great orion nebula, a cloud of dust, hydrogen, helium, and other gases.

猎户剑的位置有猎户座云，是种由尘埃、氢气、氦气及其他气体组成的云。

4.He saw clusters of stars, brightly colored nebulas, even entire galaxies!

他看到了无数团，明亮的云，甚至还看到了整银河！

5.That's a very common shape for planetary nebulae.

这是行状云很常见的形状。

6.However, this nebula started off more or less as a big shapeless blob.

但是开始这云或多或少更像不成形的水滴。

7.In a lot of nebulae there's no sharp edge; they just kinda fade away.

在很多云中并没有尖锐的边缘；它们只是会慢慢消失。

8.Gas inside a nebula can be in turmoil, too.

云内的气体也可能处于混乱状态。

9.It is a nebula: a star-forming region where new stars are being born.

在诞生新恒的恒形成区域。

10.The most famous of all of them is probably the supernova explosion that gave rise to the Crab Nebula.

其中最著名的当属诞生了蟹状云的那场超新爆炸。

11.The Orion nebula is one of the wonders of the universe.

猎户座云是宇宙中的奇迹之。

12.This object is what we call a planetary nebula.

这物体就是我们所说的行状云。

13.These can create lovely sheets, tendrils, and filaments in nebulae as well.

这些也可以在云中创造出可爱的片状、卷须和丝状物。

14.Among the other four images were two that showed huge clouds of gas and dust – called nebulas.

在其他四张照片中，有两张展示了巨大的气体和尘埃云——也就是云。

15.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，比如行状云或超新。

16.Everything we find on the Earth today also originated in that nebula.

我们地球上的切也都来源于那片云。

17.Nebulae are clouds of gas and dust in space.

云是太空中由气体和尘埃组成的云。

18.The glow in a planetary nebula is due to the hot central white dwarf exciting the gas.

行状云中的光芒是由中央炽热的白矮激发气体产生的。

19.When Pan Gu broke the nebula apart, The dense and pure defined, did clearing start.

当盘古破开云， 稠密分明， 清净始。

20.At the centre of the nebula lies the remnant of the star, its core, crushed by the force of gravity.

在云的中心处，这颗恒的核依然存在着，在引力的作用下它已是面目全非。