高考英语二轮专题复习阅读理解极限突破测试卷(7)
On a clear night, the sky is a wonderful thing. Is there life out there somewhere? Is there another place like Earth where life might exist? If so, where is it? And how far away is it?
Recently, the American Kepler spacecraft found "22b" , a planet about six hundred light years away.
It is the first planet in a " habitable zone" outside the solar system. That means the planet orbits a star like our Sun, but it is not too close to it, nor too far away. Because of this position, scientists say Kepler22b might have water, one of the main things needed for life.
The newly-discovered planet is about two and a half times larger than the Earth. It is closer to its star than we are to the Sun, but 22b's sun is smaller than ours, and doesn’t produce as much heat. Scientific instruments show the new planet could be made of gases, rocks or some kinds of liquids.
The Kepler spacecraft was named in honor of Johannes Kepler, the seventeenth century German astronomer. It was designed to examine a small part of the Milky Way galaxy and search for places like the Earth. It was made to inspect over 150,000 stars and measure how bright they are. It looks to see if a star's brightness gets less over a short time.
If a planet passes between Kepler and the star, it blocks out part of the light. That is what suggested to scientists that there is at least one planet orbiting the star. The instruments on Kepler show the new planet as a small, black dot moving across its sun. An important part of the Kepler experiment is on the Earth. After the spacecraft gathers information, scientists use the space telescopes on the ground.
【2016届高考英语二轮专题复习阅读理解极限突破测试卷(7)】相关文章:
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练:2(含解析)
★ 2017届高考英语二轮复习大题冲关秘籍语法填空:创新押题(含解析)
★ 2014届高考英语一轮复习课时作业(三十四)选修6Module 4《Music》(外研版)
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (76)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(15)含答案
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (44)
★ (全国通用)2014届高考英语一轮单元复习 限时强化训练一
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21