英语听力：自然百科 穿越银河系的旅行 Through Milky Way—28

 The first stars in our Milky¹ Way were fearsome high-octane stars, burning their hydrogen fuel at tremendous rates, rushing through their life cycle.

 

They like the rockslides. They live fast and die young. They run out of their fuel very quickly and even after just a few million years, they will really die. 

 

They died in some of the most violent explosions to rock the universe. Gigantic supernovae which shone brilliantly and the energy given off from the life and death of these massive stars, led to a remarkable² transformation³. 

 

 

 

The first billion years of the universe history, galaxies⁴ start/ to form. The dark hydrogen fog, their light not being able to get to us, but as time / progresses and their most massive stars put out ultraviolet radiation. It's that radiation itself that changes the fog around them and the universe becomes transparent⁵ in those regions. These galaxies

 

are then here cleaning out the fog around them. 

 

 

 

The blue voids where energy from the new stars is clearing the dark hydrogen fog. 

 

But towards the billion years after the Big Bang, the entire fog has cleared we now see all the galaxies and the Dark Ages end.

 

As the hydrogen fog lifts, we get our first glimpse of fledgling galaxies, of which our Milky Way is one. But what does it look like? 

 

 

 

This remarkable image is the Hubble ultra deep field, it’s the longest exposure that's ever been taken with Hubble Space Telescope. It's a truly remarkable image, probably the most famous to professional astronomers⁶. 

 

 

 

For over 11 days, Hubble stared at a tiny patch of the sky about the width of a penny held 75 feet away.

1 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。

2 remarkable   

adj.显著的，异常的，非凡的，值得注意的

参考例句：

• She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
• These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。

3 transformation   

n.变化；改造；转变

参考例句：

• Going to college brought about a dramatic transformation in her outlook.上大学使她的观念发生了巨大的变化。
• He was struggling to make the transformation from single man to responsible husband.他正在努力使自己由单身汉变为可靠的丈夫。

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 transparent   

adj.明显的，无疑的；透明的

参考例句：

• The water is so transparent that we can see the fishes swimming.水清澈透明，可以看到鱼儿游来游去。
• The window glass is transparent.窗玻璃是透明的。

6 astronomers   

n.天文学者，天文学家( astronomer的名词复数 )

参考例句：

• Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
• Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。 来自《简明英汉词典》