You can't see the water vapor, because it's a gas, but it is still there.

由于水蒸气是气，所以我们看不到它，但它依然真实存在。

And they're wildly diverse — big, small, airless, rocky, gaseous, hot, cold, and more.

它们种类繁多——大、小、缺少空气、、气、热、冷，等等。

It takes a liquid form as running water, gaseous as vapor or solid as ice.

它可以是液流水，气蒸汽或是固冰。

This turning ball of gas may look like an artist's rendering, but it's the real thing.

这个旋转着气星球看上去像一幅艺术家画作，然而却是真实物体。

Jupiter itself is a very gassy planet.

木星本身是个非常气行星。

Saturn is a gas giant, which means it has a thick atmosphere.

土星是一个巨大气行星，这意味着它有一个厚厚大气层。

Such skewed orbits are common for so-called hot Jupiters—gas giants that orbit close to their hosts.

这种歪斜轨道在所谓“热木星”——近距离星运行气巨星——中很常见。

It's a gas giant with a broad set of rings.

它是一颗巨大气行星，有一组宽阔环。

Most of the worlds we've encountered are either ice giants like Neptune, or gas giants like Jupiter and Saturn.

我们发现多数星球要么是像海王星一样冰巨星，要么是像木星和土星这样气巨星。

And what can that tell us about our own planet's chances of surviving a crash into the gas giant?

这对我们星球在撞上这颗气巨星后生存机会有何启示？

It's the biggest planet in our solar system, a gas giant.

它是我们太阳系中最大气行星。

Its giant gaseous body and violent storms, make it one of the most alien environments in the solar system.

它那气身躯和强烈风暴，产生了太阳系里最不一样环境。

Planets, even gas giants like Jupiter, are far too small to generate fusion.

行星，甚至是像木星这样气巨行星，都太小而无法产生聚变。

" Evidence suggests that this is the earliest stage of formation ever observed for a gas giant, " he added.

“有证据表明，这是有史以来观察到气巨行星形成最早阶段。”

Jupiter, Saturn, Uranus and Neptune, these planets farthest from the Sun make up the gassiest outer worlds of the Solar System.

木星，土星，天王星，海王星一个比一个远离太阳都是拥有着气外表远日行星。

As a result, the weather on Uranus is mostly calm when compared to the feverish activity of the other gas giants.

所以比起其他气巨行星不稳定气象，天王星天气变化平稳。

(spooky music) (whoosh) Lyman-alpha blobs are gigantic gaseous structures produced by an unknown mechanism.

（幽灵般音乐）（嗖嗖声）莱曼-阿尔法斑点是由未知机制产生巨大气结构。

If our gas giant became 1,000 times more massive, the Solar System would go wild.

如果我们气巨行星质量增加 1000 倍，太阳系就会变得疯狂。

Congratulations! This is the deepest that any exploration has ever sailed into the gas giant.

恭喜！ 这是对这颗气巨行星进行任何探索中最深一次。

I also don't see the world moving necessarily large amounts of gaseous hydrogen around.

我也没有看到世界必然会移动大量气氢。