宇宙时空之旅：未知世界（2020）

Cosmos: Possible Worlds S01E03

Part 5 Aug. 24, 2022, 10:55 a.m.

就算不是天文生物学家
You don't have to be an astrobiologist to know at
你也能一眼看出地球上充满生机
first glance that life is everywhere on Earth.
这几乎改变了每一寸土地
It's changed virtually every square inch of the place.
对外星人来说地球当然是受限的第五类星球
From an alien point of view, Earth would certainly have a restricted Cat-5 status.
但恩塞勒达斯的秘密藏在地底深处
But Enceladus keeps its secrets hidden deep inside.
冰和水蒸气以八百英里的时速
Those geysers of ice and water vapor are shooting out
从恩赛勒达斯地表间歇性喷出
of Enceladus at 800 miles per hour.
献给了最外♥围♥的"土星E环"
They're this moon's contribution to the outermost so-called "E" ring of Saturn.
但里面不只有水
But there's a lot more in them...
氮氨甲烷
nitrogen, ammonia, methane.
有甲烷的地方就可能有橄榄石
And where there's methane, there may be olivine.
恩塞勒达斯的间歇泉至少喷了一亿年
Enceladus has been at this for at least 100 million years.
还会继续喷发90亿年
It could keep cranking out water for another nine billion years.
这些水来自何方？
Where's all that water coming from?
蓝色雪花以一千多英里的时速下坠
The blue snowflakes plummet at more than 1,000 miles per hour.
我们来到南半球
We've come here to the southern hemisphere because
因为这里的冰壳最薄
that's where the ice crust is thinnest.
只有几英里厚
It's only a couple of miles thick.
所以最有可能进入地底海洋
That's why it's the best possible place to gain access to the underground ocean.
好现在要提醒大家一下：
Okay, now's the time for a warning:
你所看到的景象都有事实根据
What you see here is entirely based on evidence.
漫布全球的海洋间歇泉的澎湃水幕
That global ocean, the crazy curtain of geysers,
地表古怪的积雪
that weird snow at the surface...
都是千真万确的
it's all real.
卡西尼号♥探测任务的诸多观察显示
We have multiple observations from the Cassini
这就是恩赛勒达斯的实况
mission telling us that this is what awaits us on Enceladus.
但接下来是根据事实做出的猜测
But we're about to enter the realm of informed speculation.
顶尖的太空科学家认为如果派遣太空船潜入恩赛勒达斯的核心
This is what the leading space scientists think we might find
我们会看到这样的景象
when we send a spacecraft to dive straight into the heart of Enceladus.
这里的水进入真空的太空时
When water up here is exposed to the vacuum of space,
马上凝结成雪
it turns to snow.
那些浮渣就是生命的要素
And that scum is the stuff of life...
有机分子
organic molecules.
你不禁好奇会在底下看到什么
It makes you wonder what could be waiting for us down below.
我们离地底很远
And that's a long way from here,
因为这片海洋大概比地球海洋深十倍
because we're in an ocean that's about ten times deeper than the oceans of Earth.
前景可期
Very promising.
有碳和氢而且水的酸碱度
That's carbon and hydrogen, and the pH of the water is
和地球初期的海洋十分相似
just like the early ocean on Earth.
这座生命之城怎么会比
Why would this City of Life be larger than the one at the
地球的海底之城更大？
bottom of the ocean on Earth?
也许是因为恩赛勒达斯的重力
Maybe it's because the gravity on Enceladus is so
比地球重力小得多
much weaker than it is on Earth.
重力越小高塔越轻盈
With less gravity, the towers are lighter,
也就长得更高
and they can grow taller.
水流十分强劲
The currents are strong,
可能已经冲垮了几座高塔
and they may have toppled some of the towers.
维克多·戈尔德密特的橄榄石
Victor Goldschmidt's olivine.
这些橄榄石为生命的诞生创造了条件
The rocks have made a place for life.
但生命有足够的时间把握机会吗？
But has life had enough time to take hold?
我只知道永远不要低估这位逃脱大♥师♥
All I know is, never underestimate the escape artist.
我们人类很奇怪
You know, it's a funny thing about us.
我们认为自己是主角
We think we're the story.
我们是宇宙一切的一切
We're the end all and be all of the cosmos.
然而现在看来我们只是
And yet, for all we know, we're just the by-product of
地球化学力量的副产品
geochemical forces...
这种力量遍布整个宇宙
ones that are unfolding throughout the universe.
星系创造了恒星恒星创造了行星
Galaxies make stars, stars make worlds,
现在看来是行星和卫星创造了生命
and for all we know, planets and moons make life.
这会让生命略显逊色？
Does that make life less wondrous?
还是更加精彩呢？
Or more?