听力是六级考试中的重要题型，考生对这部分的复习一定不能松懈，考生可以充分利用暑期时间坚持练习听力，下面是一篇英语六级听力练习，快来练练吧。

When NASA launched the Kepler Space Telescope in 2009, scientists learned something new - and quite significant, says the director of the Space Telescope Science Institute, Matt Mountain.

“Our galaxy has at least 100 billion planets in it.

And we didn't know that five years ago," said Mountain.

Of course, Kepler and today's other powerful telescopes cannot actually see those planets; they are too faint against the light of their stars.

But scientists can measure the change of light when they pass in front of the star and analyze the light passing through their atmosphere to determine what is in it.

“Well, if we were looking at Earth, we would see signs of our sky, our blue sky, we would see signs of oxygen, of carbon-dioxide, of sulfur dioxide from volcanoes and we might even see signatures that there was plant life," said NASA's astrophysicist and former astronaut John Grunsfeld. "And we see that by dissecting the light into its component colors."

Most of the planets discovered so far are unlike Earth. They are too big, too small, too close to their sun, or too far away to support life. But astrophysicist Sara Seager says small planets the size of Earth are extremely common.

“We're looking for biological signatures, gasses that are produced by life, gasses that don't belong in the atmosphere," said Seager.

In cooperation with the European Space Agency and scientists from other nations, NASA is building the next generation of space telescopes that may be able to find evidence of life.

The James Webb Space Telescope, scheduled to be deployed in 2018, will have unprecedented sensitivity and resolution that will greatly improve the spectroscopic analysis of distant stars and planets.

NASA’s chief scientist Ellen Stofan says the agency also plans to look for life on Jupiter’s moon Europa, which may have an ocean under its ice cover.

“In our own solar system we know where to go, we know what to measure it and we're in the process of doing just that. Looking out, beyond our solar system, we're on the right track, we're making the right measurements and we're just on the cusp of learning so much," said Stofan.

Scientists say there's a very high probability that they will find a planet very much like Earth. That could help answer the question: how hard is it for life to get a foothold in the universe?

全面掌握四六级考试信息，为备考复习做准备！

什么人能考四六级：全日制专科、本科、研究生在校生可报考四六级，其中英语四级考试成绩达到425分以上（含425分）的在校大学生才可报考六级，同一考试批次，四级和六级不能兼报。点击查看更多>>

四六级什么时候考：大学英语四六级考试每年举办两次，分别是6月中下旬的周六和12月中下旬的周六，具体时间每年略有不同，需查看本校教务处报名通知了解。点击查看最新考试时间>>

四六级在哪儿报名：英语四六级考试现在都由各学校组织报名，一般会通过学校的教务网站或者各学院集体报名，报名后还有信息确认的过程，部分学校需要电子摄像。点击查看更多>>

四六级报名费要多少：四六级报名费用由各院校在报名时收取，不同地区及院校收费标准不同，一般在15-70元不等，部分院校不设立现场交费，采取从校园卡或银行卡统一划扣方式收取。点击查看更多>>

四六级考试流程是怎样的：英语四六级是同一天考试，上午考四级，下午考六级。考场上先试音，然后进行作文部分答题，之后是听力部分考试，最后是剩余题型考试。点击查看更多>>

四六级分数怎么计算：大学英语四、六级考试的分数报道采用常模参照方式，不设及格线。四六级考试单项成绩有四个部分，这四个部分以及所占的分值比例为：听力占35%，阅读占35%，翻译占15%，作文占15%。点击查看更多>>

四六级考试改革了哪些：CET考委会宣布从2013年12月考次起对英语四六级考试题型改革。本次四六级考试改革取消了完形填空、快速阅读，增加阅读理解匹配题，复合式听写改为单词和词组听写，句子翻译改为短文汉译英。点击了解更多>>

四六级成绩什么时候出：四六级考试成绩一般是考后两个月左右公布，一般在成绩查询开始前10天左右，四六级考委会网站会公布成绩查询通知，告知大家确切的成绩查询开始时间及成绩查询方式。点击了解更多>>

四六级多少分过：四六级报道成绩满分为710分，凡成绩在220分以上的考生，发给成绩单，不设官方及格线。但考委会规定“四级成绩达到425分以上（含425分）者方可报考六级”，故一般认为四级及格线是425分。点击了解更多>>