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

气体会发光，我们称之为发射。

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

猎户座种特殊，叫做恒摇篮。

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，种由尘埃、氢气、氦气及其他气体组成的。

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

些小而稠密，另些的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.

但开始这或多或少更像个不成形的水滴。

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。

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

恒些中诞生，并消亡的过程中创造新的。

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

个正诞生新恒的恒形成区域。

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

虽然大多数发射看起来很可观，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.

发射的颜色取决于其中的气体和它的温度。

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

其他四张照片中，有两张展示了巨大的气体和尘埃——也就。

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

因为当我们凝视时，我们看到的并不单的化学元素。

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

这位于猎户座带下方的发射。

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，即大团富含化学物质的团飘逸宇宙之中。

From spectral lines, the composition of nebulae.

从谱线看，的组成。

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

的中心处，这颗恒的核依然存着，引力的作用下它已面目全非。

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

例如，氢的红光最为强烈，我们大多数发射中都能看到这种颜色。

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

当盘古破开， 稠密分明， 清净始。

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

猎户座宇宙中的奇迹之。

He discovered that this was not, in fact, a nebula.

他发现这实际上不。