雅思阅读模拟试题（六）(附答案)_雅思英语阅读

雅思阅读模拟试题（六）(附答案)

　　7. To search for planets, the telescope will look for the dimming of starlight caused when an object passes in front of a star, known as a transit. Although it will take more sophisticated space telescopes planned in the next 10 years to confirm the presence of an Earth-like planet with oxygen and liquid water, Corot will let scientists know where to point their lenses.

　　8. Measurements of minute changes in brightness will enable scientists to detect giant Jupiter-like gas planets as well as small rocky ones. It is the rocky planets - that could be no bigger than about twice the size of the Earth - which will cause the most excitement. Scientists expect to find between 10 and 40 of these smaller planets.

　　9. Corot will also probe into stellar interiors by studying the acoustic waves that ripple across the surface of stars, a technique called asteroseismology.

　　10. The nature of the ripples allows astronomers to calculate a stars precise mass, age and chemical composition.

　　11. A planet passing in front of a star can be detected by the fall in light from that star. Small oscillations of the star also produce changes in the light emitted, which reveal what the star is made of and how they are structured internally. This data will provide a major boost to our understanding of how stars form and evolve, Prof Roxburgh said.

　　12. Since the discovery in 1995 of the first exoplanet - a planet orbiting a star other than the Sun - more than 200 others have been found by ground-based observatories.