Supermassive Black Holes 超大质量黑洞 - 15

In January 2000, John Dubinski set out to calculate the final fate of our galaxy¹, the Milky² Way, and that of our nearest neighbor, Andromeda.

The Andromeda galaxy is actually falling towards the Milky Way, which means there probably have some close encounter at some point in the future.

At the moment, Andromeda is moving towards us at 400,000 kilometers per hour and scientists think one day it will hit us. So Dubinski decided³ to work out what will happen to us in three billion years when the two galaxies⁴ finally collide. After a long and complex calculation, the result was a vivid picture of the impending⁵ collision. A detailed⁶ prediction of how the Milky Way will end.

The clouds of gas hit each other at these huge velocities⁷, hundreds of kilometers per second, and that basically creates great shockwaves which move through the gas and heat it to great temperature.

At the heart of this maelstrom⁸, the boiling gases hurl⁹ towards the two converging¹⁰ black holes. This kick-starts a violent dual¹¹ feeding frenzy¹² as the two monsters spiral towards each other.

And eventually those two independent black holes with their accretion¹³ discs will spiral together and merge¹⁴ themselves and form an even more massive black hole.

Two possible fates await us. If we are on one side of the galaxy when this clash happens, we could be thrown out into the emptiness of space- if we are lucky.

The second possibility is that we're on the other side of the galaxy at the time of the collision in which case we could be thrown right into the center of this chaos¹⁵.

In the active center of the merging¹⁶ galaxy, the huge feeding black hole will trigger a giant stellar explosions and supernovae. This is bad news for Earth.

There could be a horrible catastrophe¹⁷. The wave of radiation from the blast wave of the supernova would hit the atmosphere and boil it off in an instant. So the atmosphere would be gone, the seas would boil off into space and the Earth would be toast.

1 galaxy   

n.星系；银河系；一群(杰出或著名的人物)

参考例句：

• The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
• The company has a galaxy of talent.该公司拥有一批优秀的人才。

2 milky   

adj.牛奶的，多奶的；乳白色的

参考例句：

• Alexander always has milky coffee at lunchtime.亚历山大总是在午餐时喝掺奶的咖啡。
• I like a hot milky drink at bedtime.我喜欢睡前喝杯热奶饮料。

3 decided   

adj.决定了的，坚决的；明显的，明确的

参考例句：

• This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
• There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。

4 galaxies   

星系( galaxy的名词复数 )； 银河系； 一群（杰出或著名的人物）

参考例句：

• Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
• 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。

5 impending   

a.imminent, about to come or happen

参考例句：

• Against a background of impending famine, heavy fighting took place. 即将发生饥荒之时，严重的战乱爆发了。
• The king convoke parliament to cope with the impending danger. 国王召开国会以应付迫近眉睫的危险。

6 detailed   

adj.详细的，详尽的，极注意细节的，完全的

参考例句：

• He had made a detailed study of the terrain.他对地形作了缜密的研究。
• A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。

7 velocities   

n.速度( velocity的名词复数 )；高速，快速

参考例句：

• In experimenting we find out that sound travels with different velocities through different substances. 在实验中，我们发现声音以不同的速度通过不同的物质而传播。 来自《现代汉英综合大词典》
• A gas in thermal equilibrium has particles of all velocities. 处于热平衡的气体，其粒子有一切速度。 来自辞典例句

8 maelstrom   

n.大乱动；大漩涡

参考例句：

• Inside,she was a maelstrom of churning emotions.她心中的情感似波涛汹涌，起伏不定。
• The anxious person has the spirit like a maelstrom.焦虑的人的精神世界就像一个大漩涡。

9 hurl   

vt.猛投，力掷，声叫骂

参考例句：

• The best cure for unhappiness is to hurl yourself into your work.医治愁苦的最好办法就是全身心地投入工作。
• To hurl abuse is no way to fight.谩骂决不是战斗。

10 converging   

adj.收敛[缩]的，会聚的，趋同的v.（线条、运动的物体等）会于一点( converge的现在分词 )；（趋于）相似或相同；人或车辆汇集；聚集

参考例句：

• Plants had gradually evolved along diverging and converging pathways. 植物是沿着趋异和趋同两种途径逐渐演化的。 来自辞典例句
• This very slowly converging series was known to Leibniz in 1674. 这个收敛很慢的级数是莱布尼茨在1674年得到的。 来自辞典例句

11 dual   

adj.双的；二重的，二元的

参考例句：

• The people's Republic of China does not recognize dual nationality for any Chinese national.中华人民共和国不承认中国公民具有双重国籍。
• He has dual role as composer and conductor.他兼作曲家及指挥的双重身分。

12 frenzy   

n.疯狂，狂热，极度的激动

参考例句：

• He was able to work the young students up into a frenzy.他能激起青年学生的狂热。
• They were singing in a frenzy of joy.他们欣喜若狂地高声歌唱。

13 accretion   

n.自然的增长，增加物

参考例句：

• Every culture is an accretion.每一种文化都是长期积淀的结果。
• An accretion of sediment at the mouth of the river caused serious flooding.河口堆积物的增加导致河水严重泛滥。

14 merge   

v.(使)结合，(使)合并，(使)合为一体

参考例句：

• I can merge my two small businesses into a large one.我可以将我的两家小商店合并为一家大商行。
• The directors have decided to merge the two small firms together.董事们已决定把这两家小商号归并起来。

15 chaos   

n.混乱，无秩序

参考例句：

• After the failure of electricity supply the city was in chaos.停电后，城市一片混乱。
• The typhoon left chaos behind it.台风后一片混乱。

16 merging   

合并（分类）

参考例句：

• Many companies continued to grow by merging with or buying competing firms. 许多公司通过合并或收买竞争对手的公司而不断扩大。 来自英汉非文学 - 政府文件
• To sequence by repeated splitting and merging. 用反复分开和合并的方法进行的排序。

17 catastrophe   

n.大灾难，大祸

参考例句：

• I owe it to you that I survived the catastrophe.亏得你我才大难不死。
• This is a catastrophe beyond human control.这是一场人类无法控制的灾难。