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The connection between a galaxy and the black hole in its heart is not yet well understood.
星系與其中心的黑洞的關系到現在為止還沒研究清楚。
But astronomers believe that black holes play a part in the formation of galaxies.
但是天文學家認為黑洞為星系的形成作出了貢獻，
As far as we know, every big galaxy has a black hole at its very center.
現在我們知道，超大星系的正中央有黑洞。
We don't know exactly how this happens.
但是我們不知道這種現象是如何產生的。
It must have something to do with gas falling in as the galaxy evolves.
這一定與星系進化時氣體的沉降有關系。
This has been one of the revelations come through the Hubble Space Telescope,
哈勃望遠鏡所揭示的事項之一：
is the real deep and fundamental connection between black holes and galaxies, done by looking at M-87.
黑洞與星系之間有深層的、基本的聯系，這是由觀測M-87。
But also dozens of other galaxies.
和其它大量星系得出的結論。
Before Hubble, black holes were merely a concept, an unproven part of astronomical lore.
在有哈勃之前，黑洞僅僅是理論上的概念，是一項未經證實的天文知識。
Hubble Space Telescope has changed that forever.
哈勃望遠鏡將之永遠改變。
The violent forces that create stars far off in space also shape our own solar system.
劇烈的能量在遙遠的太空中創造出恒星，也塑造出了我們的太陽系。
In the summer of 1992, comet Shoemaker-Levy 9, or SL-9, passes too close to Jupiter.
1992年夏，舒梅克?李維9號彗星(簡稱SL-9)超近距離掠過木星。
The 1.8 kilometer comet is trapped by the giant planet's gravity.
這顆1.8公里的彗星被木星的重力捕捉到。
Then SL-9 breaks apart.
然后SL-9碎裂開來。
The fragments spread into a long single line which Hubble showed in an image called "the string of pearls".
碎片沿一條長線分散，在哈勃拍攝的圖片中叫做“珍珠串”。
Data suggests that these pearls would soon collide with Jupiter.
當時數據顯示這些碎片很快會撞上木星。
So planetary astronomer, Heidi Hammel, submits a proposal to NASA.
行星天文學家海蒂?海莫向NASA遞交了一項建議。
We had known for many, many decades that collisions are an incredibly important part of solar system evolution.
很久以前我們就已經知道，碰撞對太陽系的演化是極其重要的。
You look at the moon and you see craters.
當你看到月球，你就會看到許多隕石坑，
So you know that collisions are important.
所以碰撞是很重要的。
Even on the earth, we've known for decades that collisions have played a big role.
數十年前我們已經知道，甚至在地球上，碰撞也扮演了重要角色。
But we never have had the opportunity to see a collision.
但是我們還從來未有過親眼看到碰撞的機會。
