Which came first, black holes or galaxies?
是先有黑洞呢？还是先有星系？
Still, elliptical galaxies can be very large.
但椭圆星系可以非常巨大。
NEW STUDY: Mystery Matter Helped Build First galaxies.
新研究：神秘物质帮助最初的星系建立。
Few new stars are known to form in elliptical galaxies.
几乎没有已知的新恒星形成于椭圆星系。
Two galaxies have obviously just collided.
两个星系显然是撞击过了。
Sure enough, they found a cluster of galaxies.
很明确，他们发现了一个星系群。
Are the galaxies in the universe moving through space?
太空中的各个星系都在其间移动吗？
We had to rethink our ideas of how galaxies were made.
我们不得不重新审视我们对星系形成的认识。
It is one of the most famous spiral galaxies in the sky.
这是宇宙中的一个非常著名的螺旋状星系。
Most galaxies occur in pairs or in small multiple groups.
大多数星系成双或几个成一小群。
However, the distance between the galaxies does increase.
然而，星系之间的距离确实在不断增加。
Julia: in reality, we belong to one galaxy in a sea of galaxies.
朱莉娅：现实中，我们只是星系海洋中的一个星系。
Satellite galaxies of the Milky Way usually perish in its grasp.
银河系的卫星星系通常在其范围内消亡。
Explanation: What's the matter with this cluster of galaxies?
解说：这个星群怎么了？
Two of the three galaxies are forming new stars at a high rate.
三个星系中的两个正在以很高的速度形成新的恒星。
We still don't know how many galaxies there are in the universe.
我们还不知道宇宙中有多少个星系。
We haven't even begun to map the many galaxies that we know exist.
我们甚至对我们已知的星系都没进行勘测呢。
Now we believe black holes also play a critical role in the birth of galaxies.
现在，我们相信黑洞也同时在星系的产生中，发生着决定性的作用。
Like distant galaxies, there are likely to be plenty more as yet undiscovered.
就像遥远的星系一样，这类院校很可能还有很多还未为人所发现。
Large spiral galaxies like the Milky Way seem to have two or three per century.
像银河系那样螺旋状的大星系每世纪似乎会出现两到三个。
"Cool! " Trevor exclaimed. "This is probably a travel through galaxies! "
“酷！”特雷福喊道，“没准这回会来次银河系之旅啊！”
God made all the planets, and more stars and galaxies than anyone could ever count!
神造了所有行星，和没有人能够数算的星和星系！
Perhaps one day we will have discovered the technology to travel to different galaxies.
也许有一天我们会发明新科技去外星系旅游观光。
Astronomers at the University of California discovered one of the most distant galaxies.
加利福尼亚大学的天文学家发现了其中最为遥远的星系之一。
Eventually, the region would stop expanding, and would contract to form galaxies and stars.
最终，该地区将停止扩张，转为收缩，形成星系和星体。
Our Universe contains over a billion galaxies; star cities each with a hundred billion inhabitants.
整个宇宙拥有十亿多个河外星系，一个河外星系就是一座星城，每座星城有“居民”上千亿颗。
Our Universe contains over a billion galaxies; star cities each with a hundred billion inhabitants.
整个宇宙拥有十亿多个河外星系，一个河外星系就是一座星城，每座星城有“居民”上千亿颗。
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