在雅思考试时，关于自然科学方面的话题，也会被考到，平时多积累相关信息的雅思英语，才能更好的应对考试。学习世界大事时常用到的单词和短语，准备全面总是好的。

　　Background:科学家近日通过“开普勒”太空望远镜观测到一个距离地球2000光年的奇特行星系统。其恒星与太阳相似，并有6颗行星围绕它运行。

　　Finding six new planets around a single star represents an impressive haul. Nasa is calling it the best find since the first so-called ‘exoplanet’ was discovered 16 years ago. It might not be the most populated solar system yet found - six or possibly seven planets have been found in a rival system, but it's the nature of this new discovery which is getting the astronomers scratching their heads in wonder.

　　Five of the six planets are crammed tightly in around the Kepler-11 star, with orbits of between just ten and 47 days. That means they're all super hot, but the data suggests they're also made mostly of gas.

That's strange, because small hot planets this close in should have been ripped asunder by their parent star in their formative years, say the scientists. One possible explanation is that the planets started out bigger and further out and were slowly dragged into tighter orbits, as part of a contracting belt of dust and asteroids.

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