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Ten light years from Earth, the star Epsilon Eridani
天苑四恒星距離地球10光年
Spectacular rings of dust and ice
它有由塵埃和冰構成的壯觀圓環(huán)
And somewhere in there, planets forming out of debris
在圓環(huán)里的某些地方，有碎片形成的行星
being born before our eyes.
就在我們眼前誕生
Asteroids and comets everywhere
到處都是小行星和彗星
We could almost be looking at our own solar system
我們幾乎就是看到了數(shù)十億年前的
billions of years ago.
我們太陽系的樣子
With comets delivering the building blocks of life
彗星把生命材料帶到
to these young planets.
這些年輕的行星上
At the center of all the action, a star smaller than our sun
主導這些行為的是一個比我們太陽小一些的恒星
still in its infancy.
這顆恒星還處于幼年
Any life in this solar system would be primitive at best
這個太陽系的生命應該還很原始
There must be more mature solar systems out here
這里應該還有更成熟更進化的太陽系
But finding them is like looking for a needle in a cosmic haystack
但是找到它們卻像在宇宙海洋里撈針
Twenty light years from Earth.
距離地球20光年
Star Gliese 581
紅矮星格雷司 581
It's about the same age as our sun.
它大概和我們的太陽同齡
This planet is just the right distance from its sun
這顆行星距離它的太陽距離剛剛好
Any closer and water would boil away, any further and it would freeze
再近一點水會蒸發(fā)，再遠一點則會結成冰
Ideal conditions for life to emerge
一個生命演化的理想環(huán)境
And if a comet has struck, delivering water and organic materials
如果彗星的撞擊給它帶去水和有機原料
then life, complex beings like us, even civilizations like our own
那么生命、像我們一樣的復雜生物，甚至像我們一樣的文明
could be down there right now
現(xiàn)在就可能在這里存在
They could be tuning into our TV signals
他們可能正調(diào)到我們的電視信號
watching shows from 20 years ago.
觀看我們20年前的電視節(jié)目
But until we devise a way of communicating
但是在我們找到跨越這么遠距離的
over these vast distances, all we can do is speculate
通訊方法之前，我們只能猜測
Us and them, living parallel lives
我們和他們各自的生存著
unaware of each other's existence.
彼此都不知道對方的存在
Unless life has come and gone
除非這里曾有過生命和滅絕
