評(píng)論
打印
The Remains of a Star
星星的遺跡
What is a black hole,anyway? Oh,come on,everyone knows what a black hole is.
黑洞是什么？拜托，大家都知道黑洞。
Do they? Everybody thinks they know because of science fiction.
他們真的知道嗎？大家都只是通過科幻小說知道黑洞的。
But where do they really come from?
但是黑洞到底是怎么來的呢？
They come from stars.
黑洞是由恒星形成的。
A black hole is what you get when a really big star uses up all its fuel.
當(dāng)一顆大的恒星燃料耗盡黑洞就產(chǎn)生了。
Gravity is always trying to push all the stuff that makes up a star into its center.
由于地心引力的作用，組成恒星的所有物質(zhì)被壓縮到核心位置。
But as long as the star has enough nuclear fuel in its core to keep burning,
但是，只要恒星的核心有足夠的核燃料一直燃燒，
it pushes back. It's only when it runs out of fuel that
就會(huì)往外推。只有等燃料耗盡，
everything gets crushed down into the middle of the star.
所有物質(zhì)才會(huì)向中心坍塌。
If the star is big enough, gravity just keeps squeezing and squeezing
如果這顆恒星足夠大，地心引力會(huì)不斷擠壓
until everything that made up the star is compressed into a tiny point.
直到所有物質(zhì)被壓縮成一個(gè)密實(shí)的星體。
And get this—the gravitational attraction of that tiny point will be
得明白這一點(diǎn)：這個(gè)小星體的引力非常大，
so strong anything that comes too close will be sucked in, never to return!
任何靠近它的物質(zhì)都會(huì)被吸進(jìn)去，永遠(yuǎn)也出不來。
Not even light can escape. Even a passing beam of light will be pulled right in.
甚至連光都不能逃脫。一束經(jīng)過的光線也會(huì)被吸入。
