搜索关注在线英语听力室公众号:tingroom,领取免费英语资料大礼包。
(单词翻译)
Vesta is quite far away. Like many asteroids1, it has an orbit out between the orbits of Mars and Jupiter. Astronomers2 first spotted3 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 exterior4 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.
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎 点击提交 分享给大家。