雅思8听力材料:雅思听力材料：新行星的发现

【#英语听力# 导语】听是人们语言交际的重要方面，听是英语发音准确的关键，也是学习英语的重要途径之一，听力的识别和理解能力，与个人的知识经验有密切的联系。下面是©文档大全网分享的雅思听力材料：新行星的发现。欢迎阅读参考！

雅思听力材料：新行星的发现

　　If three's a crowd, a new planet recently discovered orbiting a sunlike star is really cluttering up its neighborhood.

　　The new planet is the fourth Jupiter-like world to be found around the young star HR 8799, astronomers announced today. The same team had previously found the other three planets in 2008, when they took a direct picture of the star system.

　　Of the more than 500 planets discovered to date outside our solar system, most have been found via indirect methods, such as looking for planets' gravitational tugs on their host stars or for dips in starlight when planets pass in front of their hosts.

　　The new planet was also found in a direct image of the HR 8799 system. But based on the masses of the planets and their distances from the star, the fourth world challenges current theories of planet formation, according to the study authors.

　　"This is the first multiplanet system directly imaged so far, so it's quite a feat," said lead study author Christian Marois, an astronomer at the Herzberg Institute of Astrophysics in Canada.

　　"But we are now stuck with four planets [and] we cannot explain their formation and their current locations by any of our models."

　　Fourth Planet Too Close to Its Parent?

　　The previously known planets around HR 8799 are about five, seven, and ten times Jupiter's mass. They orbit between 2.2 billion miles (3.5 billion kilometers) from the star—roughly the same as Neptune's distance from the sun—and 6.3 billion miles (10.1 billion kilometers), or almost twice Pluto's distance.

　　The most distant planet circles just inside a dusty disk similar to that produced by the solar system's Kuiper belt, a region of small, icy bodies that includes Pluto.

　　The whole HR 8799 system is estimated to be no more than 60 million years old, so the planets are still glowing with heat from their formation. This heat signature is what betrayed the planets' positions in the previous infrared images of the star.

　　Astronomers found the fourth planet using the Keck II telescope on the peak of Mauna Kea in Hawaii. The instrument is equipped with a special near-infrared imager and adaptive optics to eliminate the blurring effect of Earth's atmosphere.

扩展阅读：雅思听力审题技巧

　　【审题有门道，主干加考点】

　　不要试图把所有题目读懂，而是要把可能出现的替换的考点词圈出来，把句子的主干画出来。这样可以加快申题的速度，更容易抓住重点。

　　【背景非废话，总领且预判】

　　通常听力内容在答案出现之前都会有一段背景引入的话，也就是大家说的“废话”。但其实这段内容很重要，它是听力内容的简单介绍，起到提纲挈领的作用，帮助你对后面的题目做一个预判。

　　而且在这段背景之后会出现第一道题的主干，或者是同义替换的单词，只要听到这个讯号，那就可以确定，答案不远了，竖起耳朵，开始对应选项里的关键词。

　　【选项被提及，别着急做题】

　　如果选项里的内容被提及了，先不要着急做选择，而是要听这个内容是被肯定了，还是被否定了。往往会有一男一女做问答，一人提出观点，另一人做出评价或者判断，所以回答的这个人的话至关重要，他/她决定了这个观点是不是正确答案。

　　【若讨论，答案在结论】

　　还有一种情况就是，两个人就同一观点展开讨论，那么最后一个人为讨论做总结的观点，就是答案。

　　一段讨论的结束，一个答案的产生，理论上后面的内容就是下一个答题区间。我们所说的答题区间，就是答案产生的范围。抓住每个答题区间的终结者，就不会跟丢题目，找不到听力内容的进度。

　　雅思听力不是要求考生的听懂录音，而是要大家在基本听懂的基础上，抓住重点，有的放矢，在规定的时间内和抓住转瞬即逝的重点。考察的既是我们的英语听音辨音的能力，也是对我们专注力的一个考验~

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