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Imagine, piece by piece, I could compress our planet
想象將地球分成一片一片地進(jìn)行壓縮
and crush it until gravity took over.
在萬有地心引力接手前一直對其擠壓
And it became a black hole.
于是它變成黑洞
How small would it have to
它要達(dá)到多小才能
be to vanish down its own gravitational well?
陷入自身的重力勢阱呢
From 8,000 miles in diameter, I'd have to crush it to the size of a pea.
我需要將它從直徑八千英里壓至一粒豌豆大小
In my years studying black holes,
我研究黑洞的這些年里
one of my most unexpected discoveries was
一個發(fā)現(xiàn)非常出乎意料
that a black hole cannot be perfectly black.
即黑洞不完全是黑色的
For much the same reason as the early universe
如同早期宇宙
could not have been perfectly spread out,
不能完美無缺的分散一樣
there is no such thing as perfection.
世間不存在十全十美
Black holes must give off radiation.
黑洞一定會釋放輻射
The smaller the black hole, the greater the radiation.
黑洞越小，輻射越強(qiáng)
and even a tinier black hole with only the mass of the mountain range would actually shine.
甚至輕至山體質(zhì)量大小的微型黑洞也會發(fā)光
Out in space, most black holes are much larger.
太空中，多數(shù)黑洞都較大
The smaller ones have around four times the mass of our sun.
小黑洞約是太陽質(zhì)量的四倍
and are 15 miles in diameter.
直徑約十五英里
Some are much larger,
有些非常大
containing the mass of thousands of suns.
相當(dāng)于數(shù)千個太陽的質(zhì)量
And then there are the really big ones:
還有一些相當(dāng)大的黑洞
supermassive black holes,
特大質(zhì)量黑洞
that exist at the centers of galaxies like our own.
它們存在于銀河系似的星系中心
This black hole is thought to have the mass of four million suns,
這個黑洞質(zhì)量相當(dāng)于四百萬個太陽
and a diameter of 11 million miles.
直徑一千一百萬英里
Black holes like these are the heavy hubs around
這樣的黑洞是像銀河系等
which many galaxies including the Milky Way rotate,
眾多星系圍繞的巨大中心
a kind of stabilizer that gives them form and shape.
也是維持它們形態(tài)和輪廓的穩(wěn)定器
So eight billion years after the Big Bang,
宇宙大爆炸八十億年后
after a long and remarkable run of good luck,
攜著長時間顯著的好運氣
we have stars and we have galaxies,
宇宙中出現(xiàn)了在圍繞巨大黑洞
slowly rotating around giant black holes.
緩慢旋轉(zhuǎn)的星體和星系
Now the scene is set for something close to our hearts,
我們所熟悉的事物即將依次出現(xiàn)
the formation of our sun, the Earth,
太陽，地球的形成
and ultimately us.
最終，我們?nèi)祟?/p>
