The gas glows, and we call this an emission nebula.

气体会发光，我们称之为发射星。

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

猎户座星种特殊星，叫做恒星摇篮。

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

猎户剑位置有猎户座星，种由尘埃、氢气、氦气及其他气体组成。

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

他看到了无数星团，明亮星，甚至还看到了整个银河！

Some nebulae are small and dense, others can be dozens or hundreds of light years across.

些星小而密，另些星直径则可达数十或数百光年。

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

但开始这星或多或少更像个不成形水滴。

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

我们地球上也都来源于那片星。

Stars are born in some nebulae, and create new ones as they die.

恒星在些星中诞生，并在消亡过程中创造新星。

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

个正在诞生新恒星恒星形成区域。

Although most emission nebulae look substantial, they're actually incredibly tenuous.

虽然大多数发射星看起来很可观，但它们实际上非常稀薄。

The color of an emission nebula depends on the gas in it and how hot it is.

发射星颜色取决于其中气体和它温度。

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，有两张展示了巨大气体和尘埃——也就星。

Because when we look deep into the nebula, we don't just see individual elements.

因为当我们凝视星时，我们看到并不单化学元素。

This is an emission nebula located just below Orion's belt.

这位于猎户座星带下方发射星。

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，形成新星，即大团富含化学物质团飘逸在宇宙之中。

From spectral lines, the composition of nebulae.

从谱线看，星组成。

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

在星中心处，这颗恒星星核依然存在着，在引力作用下它已面目全非。

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

当盘古破开星， 密分明， 清净始。

Hydrogen, for example, glows most strongly in the red, and we see that color in most emission nebulae.

例如，氢红光最为强烈，我们在大多数发射星中都能看到这种颜色。

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

猎户座星宇宙中奇迹之。