VOA标准英语2009年-NASA Crafts Smash into Moon in Search for

By Brian Wagner
Miami
09 October 2009

 
Lunar Crater¹ Observation and Sensing Satellite, or LCROSS, and its rocket's upper stage 
The U.S. space agency has smashed a pair of heavy space craft into the moon's surface in the hopes of finding evidence of frozen water or other potential resources. It may take weeks of analyzing² data before NASA scientists announce their findings.

Scores of telescopes and other monitoring equipment turned toward the moon early Friday to watch two NASA craft crash into the south pole of the Moon.

Flight director Paul Tompkins led the mission team as the first payload hit the surface.

"All stations, flight," said Paul Tompkins. "Mark Centaur³ impact."

Scientists with the Lunar Crater Observing and Sensing Satellite mission, or LCROSS, said the payloads hit their target - the dark and frigid⁴ side of a crater near the south pole. The mission however did not live up to expectations that the payloads would create a cloud of debris⁵ visible to telescopes on Earth.

NASA officials had encouraged both academic and amateur space observers to view what they thought would be an exciting sight.

The mission's lead investigator⁶ Tony Colaprete said the debris plume⁷ was not seen in the first set of images, but it should have been detected with other scientific measurements.

"We saw a crater, we saw a flash [afterward]," said Tony Colaprete. "So something had to happen in between."

The NASA team used a series of photographic cameras and infrared⁸ sensors⁹ to document the moment of impact and the resulting debris cloud. Additional data was collected at observatories¹⁰ around the United States, as well as satellites including the Hubble Space Telescope. The hope is the spectrum¹¹ data will produce evidence of water, hydrocarbons¹² or other organic material in the debris cloud.

But lead investigator Colaprete said it may take weeks to analyze¹³ the information and arrive at a conclusion.

"Life is full of surprises," he said. "We want to be careful not to make a false negative or a false positive claim. I am excited we saw variations in the spectra¹⁴ because that means we saw something, that was not just blackness. The information is there we just need to get to it."

One thing the team did confirm was the presence of sodium¹⁵. Colaprete said the impact of the payloads apparently¹⁶ caused a reaction with sodium which was easily spotted¹⁷ from Earth.

Regardless of the final scientific conclusions, NASA researchers said they were pleased with the LCROSS mission. NASA's chief lunar scientist Mike Wargo said officials are hoping to change the image of the moon as a desolate¹⁸, unchanging place.

"We've really been thinking about the moon in a different way," said Mike Wargo. "Who thought just a month ago we would be talking about the water cycle or the hydration cycle of the moon?"

The LCROSS mission launched in June along with a separate mission to study the moon's surface. The Lunar Reconnaissance Orbiter is surveying possible landing areas and other conditions for the possible return of astronauts to the moon.

1 crater   

n.火山口，弹坑

参考例句：

• With a telescope you can see the huge crater of Ve-suvius.用望远镜你能看到巨大的维苏威火山口。
• They came to the lip of a dead crater.他们来到了一个死火山口。

2 analyzing   

v.分析；分析( analyze的现在分词 )；分解；解释；对…进行心理分析n.分析

参考例句：

• Analyzing the date of some socialist countries presents even greater problem s. 分析某些社会主义国家的统计数据，暴露出的问题甚至更大。 来自辞典例句
• He undoubtedly was not far off the mark in analyzing its predictions. 当然，他对其预测所作的分析倒也八九不离十。 来自辞典例句

3 centaur   

n.人首马身的怪物

参考例句：

• His face reminded me somehow of a centaur.他的脸使我想起半人半马的怪物。
• No wonder he had soon been hustled away to centaur school.也难怪父母匆匆忙忙就把他送到了半人马学校。

4 frigid   

adj.寒冷的，凛冽的；冷淡的；拘禁的

参考例句：

• The water was too frigid to allow him to remain submerged for long.水冰冷彻骨，他在下面呆不了太长时间。
• She returned his smile with a frigid glance.对他的微笑她报以冷冷的一瞥。

5 debris   

n.瓦砾堆，废墟，碎片

参考例句：

• After the bombing there was a lot of debris everywhere.轰炸之后到处瓦砾成堆。
• Bacteria sticks to food debris in the teeth,causing decay.细菌附着在牙缝中的食物残渣上，导致蛀牙。

6 investigator   

n.研究者，调查者，审查者

参考例句：

• He was a special investigator for the FBI.他是联邦调查局的特别调查员。
• The investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。

7 plume   

n.羽毛；v.整理羽毛，骚首弄姿，用羽毛装饰

参考例句：

• Her hat was adorned with a plume.她帽子上饰着羽毛。
• He does not plume himself on these achievements.他并不因这些成就而自夸。

8 infrared   

adj./n.红外线(的)

参考例句：

• Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
• Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。

9 sensors   

n.传感器，灵敏元件( sensor的名词复数 )

参考例句：

• There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
• Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时，有很大变化。 来自辞典例句

10 observatories   

n.天文台，气象台( observatory的名词复数 )

参考例句：

• John Heilbron, The Sun in the Church: Cathedrals as Solar Observatories, 3-23. 约翰．海耳布隆，《教会里的太阳：教堂即太阳观测台》，第3-23页。 来自互联网
• Meteorologists use satellites, land observatories and historical data to provide information about the weather. 气象学家使用卫星、上天文台和历史资料来提供有关天气的信息。 来自互联网

11 spectrum   

n.谱，光谱，频谱；范围，幅度，系列

参考例句：

• This is a kind of atomic spectrum.这是一种原子光谱。
• We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。

12 hydrocarbons   

n.碳氢化合物，烃( hydrocarbon的名词复数 )

参考例句：

• Hydrocarbons (HC), like carbon monoxide, represent unburned and wasted fuel. 碳氢化合物(HC)像一氧化碳一样，为未燃尽的和被浪费掉的燃料。 来自英汉非文学 - 环境法 - 环境法
• With this restricted frequency range it is not applicable to hydrocarbons. 这个较紧缩的频率范围不适用于烃类。 来自辞典例句

13 analyze   

vt.分析，解析 (=analyse)

参考例句：

• We should analyze the cause and effect of this event.我们应该分析这场事变的因果。
• The teacher tried to analyze the cause of our failure.老师设法分析我们失败的原因。

14 spectra   

n.光谱

参考例句：

• The infra-red spectra of quinones present a number of interesting features. 醌类的红外光谱具有一些有趣的性质。
• This relation between the frequency and the field spectra was noted experimentally. 实验上已经发现频率和场频谱之间的这种关系。

15 sodium   

n.（化）钠

参考例句：

• Out over the town the sodium lights were lit.在外面，全城的钠光灯都亮了。
• Common salt is a compound of sodium and chlorine.食盐是钠和氯的复合物。

16 apparently   

adv.显然地；表面上，似乎

参考例句：

• An apparently blind alley leads suddenly into an open space.山穷水尽，豁然开朗。
• He was apparently much surprised at the news.他对那个消息显然感到十分惊异。

17 spotted   

adj.有斑点的，斑纹的，弄污了的

参考例句：

• The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
• Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。

18 desolate   

adj.荒凉的，荒芜的；孤独的，凄凉的；v.使荒芜，使孤寂

参考例句：

• The city was burned into a desolate waste.那座城市被烧成一片废墟。
• We all felt absolutely desolate when she left.她走后，我们都觉得万分孤寂。