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Our solar system, the place we call home
太陽系，我們的家園
lies about 26,000 light years from the center of our galaxy, the Milky Way.
位于距離銀河系中心二萬六千光年的地方
or around two thirds the way out.
或說是銀河系直徑的三分之二處
The story of how these huge planets came to be orbiting
這些巨大行星用了六百萬年才開始
an average yellow star is six billion years long,
環繞一顆中等大小的金色恒星運行
and since we don't have that much time, I'll speed it up a bit.
由于時間有限，我會加快速度解釋過程
It starts with a bang.
故事的開頭是一個大爆炸
Long ago an ancient star exploded,
很久以前，一顆古老的恒星發生爆炸
littering space with swirling clouds of the materials it had made while it lived
向空中拋出旋轉的它燃燒時產生的物質云團
and the heavier metals it created as it died.
和滅亡時產生的更重的金屬
We know this because we
我們之所以知道這些是因為
can see similar feels of dust out in space today.
現今能從星際塵埃中看到相似的感覺
They are called nebulae and they are very beautiful.
它們叫作星云，形態絢麗多彩
Every nebula is different,
每個星云都不同
and in our case the clouds contained nitrogen and oxygen and iron and silicon
我們的星云包含氮，氧，鐵，硅
and all the other stuff needed to build a world like ours.
和其他構成豐富多彩的世界所需的東西
Then the tireless force of
接著，不知疲倦的萬有引力開始
gravity started to pull it all back together.
將一切牽引到一起
And the heavy engineering that produces planets began.
創造行星的浩大工程開始了
Vast spirals of dust began to form
大量塵埃飛揚，開始排列
and at the center of one of these,
某片塵埃中央
a rocky planet called Earth started to take shape,
一顆稱為地球的巖狀行星開始成形
built of stardust and assembled by gravity.
由星塵為材料，由萬有引力組建而成
