了解宇宙是如何运行的（2010）

How the Universe Works S01E03

Part 6 April 18, 2021, 7:56 p.m.

it mean for planet Earth?
我们可能会被抛进外层空间里
We may either be thrown
out into outer space.
当银河系的螺旋臂被扯开
When the arms of the Milky
Way galaxy are ripped apart...
我们或会落入这新星系的肚里
or we could wind up in the
stomach of this new galaxy.
恒星和行星会被推至四散
Stars and planets will be
pushed all over the place.
所以地球很可能会灭亡
So this may well be
the end of planet Earth.
宇宙里面的星系会继续互相碰撞
Galaxies all over the universe
will continue to collide.
不过这银河吞食的时代将会过去
But this age of galactic
cannibalism will eventually pass.
因为宇宙中有一股更强大的破坏力
Because there is an even more
destructive force in the universe.
这股破坏力无法阻止
A force that nothing can stop.
它会把星系推开
It will ultimately push
galaxies away from each other,
拉扯一切
stretching everything...
直至宇宙被撕破
untii the universe rips itself apart.
星系是恒星、太阳系…
Galaxies are home to
stars, solar systems,
行星和卫星的家园
planets and moons.
一切重要的事都在星系里面发生
Everything that's important
happens in galaxies.
星系是宇宙的命脉
Galaxies are the
lifeblood of the universe.
有人类出现全因为我们住在星系里
We arose because we live in a galaxy.
在宇宙里, 我们能见到的一切
And everything we can see
我们所重视的一切
and everything that matters
to us in the universe
都在星系里发生
happens within galaxies.
不过星系只是由暗物质束缚的…
But the truth is galaxies
are delicate structures
脆弱结构
held together by dark matter.
科学家发现了宇宙有另一股力量
Now scientists have found another
force at work in the universe.
这股力量叫暗能量
It's called dark energy.
暗能量跟暗物质的作用相反
Dark energy has the opposite
effect of dark matter.
暗能量不是把星系拉在一起
Instead of binding galaxies together,
而是把星系推开
it pushes them apart.
我们在过去十年才发现的暗能量
The dark energy which we've only
discovered in the last decade,
是在宇宙里的支配物质, 神秘得多
which is the dominant stuff in the
universe, is far more mysterious.
我们对它为何存在一无所知
We don't have the slightest
idea why it's there.
我们不知道它的成分
What it's made from,
we don't really know.
只知道它存在
We know it's there,
却不知它是甚么或在做甚么
but we don't really know
what it is or what it's doing.
暗能量很古怪
Dark energy is really weird
就像太空里有一些小弹弓
It's as if space has
little springs in it...
令对象互相排斥, 推开对方
which are causing things to repel
each other and push them apart.
科学家相信在遥远的未来
Far in the future,
暗能量会在宇宙战争里赢了暗物质
scientists think that dark energy will
win the cosmic battle with dark matter.
那场胜利会开始令星系散开
And that victory will start
to drive galaxies apart
暗能量会令星系灭亡
Dark energy's gonna kill galaxies off.
它的做法是令所有星系…
It's gonna do that
离我们越来越远
by causing all the galaxies to recede
further and further away from us
直至见不到
until they're invisible,
以比光速快的速度远离我们
until they're moving away from
us faster than the speed of light.
所以宇宙会在我们的眼前消失
So the rest of the universe will
literally disappear before our very eyes,
不是今天或明天, 而是几兆年之后
not today, not tomorrow, but
in perhaps a trillion years,
宇旨将会消失
the rest of the universe
will have disappeared.
星系会变成深太3里的孤独前哨
Galaxies will become lonely
outposts in deep space.
不过那将会是非常遥远的事
But that's not going to happen
for a very, very long time.
宇宙如今仍在茁壮成长
For now. the universe is thriving.,.
星系在创造让生命存在的适合条件
and galaxies are creating the
right conditions for life to exist
没有星系就没有我, 没有你
Without galaxies, I wouldn't
be here. You wouldn't be here.
也许根本不会有生命
Perhaps life itself wouldn't be here.
我们很幸运, 地球上能有生命
We're lucky, life has
only evolved on Earth
全因为我们那细小的太阳系
because our tiny solar system
在银河系适合的位置诞生
was born in the right
part of the galaxy.
若更接近中心, 那就不会有我们了
If we were any closer to the
centre, well, we wouldn't be here.
在星系中心的生存条件极端恶劣
At the centre of a galaxy,
life can be extremely violent.
若我们的太阳系更接近银河系中心
And, in fact, if our solar system were
closer to the centre of our galaxy,
辐射会很强, 令我们无法存在
it would be so radioactive
that we couldn't exist at all.
离中心太远同样糟糕
Too far away from the
centre would be just as bad.
在外♥围♥的恒星没那么多
Out there, there aren't as many stars.
我们或无法存在
We might not exist at all.
所以在某种意义上
So in some sense,
我们在银河系的适居区内
we are in the Goldilock
zone of the galaxy.
不太近, 不太远, 刚刚好
Not too close, not too
far, but just right.
科学家相信在这星系适居区内
Scientists believe that
this galactic Goldilocks zone
可能有数百万颗恒星
might contain millions of stars.
所以也许有其它太阳系
So there may be other solar systems
像我们的银河系那样能孕育生命
that can support life right
here in our own galaxy.
若我们的银河系有适居区
And if our galaxy has a habitable zone,
其它的星系也可能有
then other galaxies could too.
宇宙无边无际
The universe is, is immense.
最奇妙是我们的发现也是无限的
And though, the amazing thing is
that we1re always discovering more.
每次当我们以为找到了一个答案
Every time we think we know
the answer to one problem.
却发现里面隐藏着一个更大的问题
we find it's embedded
in a much bigger problem.
那很精彩刺♥激♥
And that's exciting.
在我们的银河系和其它宇宙星系里
There are endless questions
to ask and mysteries to solve.
有无穷无尽的问题和谜团要解答
In our own galaxy, the Milky Way, and
in galaxies all across the universe.
十年前谁会想得到…
Ten years ago. who would have thought
我们能确定中心的黑洞?
that we'd be able to identify
the black hole at the centre?
十年前谁想得到
Who would have thought 10 years ago
天文学界会相信暗物质和暗能量?
that the astronomical community would
believe in dark matter and dark energy?
越来越多科学研究以星系为焦点
More and more, scientific
research is focusing on galaxies.
星系包含着宇宙运作的关键
They hold the key to
how the universe works.
我们该庆幸能活在这时候
We should be amazed
to live at this time,
在宇宙历史里的某一刻
here at a random time in
the history of the universe.
在某个星系外缘的某个行星上
on a random planet at the
outskirts of a random galaxy.
让我们能发问和理解…
where we can ask questions
and understand things
由宇宙初开到灭亡的一切
from the beginning of
the universe to the end.
我们该享受在太阳下的短暂时刻
We should celebrate our
brief moment in the sun.
星系诞生
Galaxies are born.
演化
They evolve.
碰撞
They collide.
最后灭亡
And they die.
星系是科学界的超级巨星
Galaxies are the superstars
of the scientific world.
连研究它们的科学家都各有所爱
And even the scientists who
study them have their favourites.
漩涡星系或M-51
The Whirlpool galaxy or M-51.
若要我选一个, 我喜欢草帽星系