托福阅读材料：Vesta

人类永远都对天空里的天体感兴趣，而如果不用望远镜，我们能用肉眼看到比月亮还小的天体么?下面的新托福考试阅读练习资料就来回答这个问题。

You can see the planet Jupiter on a clear night, but Jupiter is humongous. Mars and Mercury are smaller than that, and you can see them, too. Wait a minute, our moon is even smaller, and you can see that. Could anything smaller than the moon be visible without a telescope?

Actually, yes. Though it takes a lot of patience and excellent sky conditions, it is possible to see a tiny object called Vesta. Although it had a molten interior and volcanoes, Vesta isn’t a planet or a moon: it’s an asteroid. Asteroids are straychunks of rocky or metallic materials that orbit the sun but were never drawn into any of the planets.

Vesta is quite far away. Like many asteroids, it has an orbit out between the orbits of Mars and Jupiter. Astronomers first spotted it when looking for a new planet they thought should exist between these two.

As I said, Vesta is quite small–about three hundred and twenty-five miles across. So if it’s small and far away, how come we can see it from here? Vesta’s surface has a coating of pyroxine and olivine, two minerals that are actually also spewed up by volcanoes here on earth. They give it a whitish exterior that reflects well, making it just possible to see Vesta with your eyes, even when the only two larger asteroids, Ceres and Pallas, are completely invisible.

以上就是这篇托福阅读材料，同学们可以积累其中的词汇及优美句式，找到托福阅读段的主题句，了解托福阅读的几个出题点。托福阅读训练是个长期的过程。大家如果每天做几篇阅读，坚持下来，一定会有不小的进步。预祝大家能有一个好的阅读成绩。