作者:城市网 来源:城市网学院 更新日期：2013-1-29
Lesson 13 Comets
彗星
In recent scientific investigation of #ets has increased because of a growing interest in the origin of the sun and planets.
近年来，由于对太阳和行星的起源兴趣浓厚，人们对彗星进行了更广泛的科学调查。
Scientists want to learn how #ets #e into being.
科学家们想了解彗星是怎么形成的。
They think that such information will help to explain the origin of the solar system.
他们认为这方面的研究有助于解释太阳系的成因。
The word “#et” #es from Greek and it means a “hairy object”.
彗星一词城市网于希腊语，意为“长发的物体”。
In history #ets have a special place.
彗星在历史上占有特殊的地位。
People believed that they brought news of death, destruction, or military victories.
人们认为彗星预示着死亡毁灭或胜利凯旋。
The tails of #ets provide viewers with spectacular sights at night.
彗星的尾巴在夜空中堪称奇观。
Comet tails are millions of kilometers long.
彗尾的长度可达数百万公里。
There is a written record of a #et as early as 1770 B.C.
早在公元前1770年就有关于彗星的文字记载。
The Chinese kept careful records and so did the Babylonians.
中国人和巴比伦人对彗星做了详细的纪录。
Aristotle was interested in #ets.
亚里士多德对彗星很感兴趣，
He thought that they began as burning gases in the earth's atmosphere.
他认为彗星最初是地球大气中燃烧的气体。
The most famous #et in history is called Halley's #et.
历史上最着名的彗星叫作哈雷彗星，
Which appears every 75.5 years. It was named for Edmond Halley. an English scientist.
他成功预测了他去世后16年，即1758年哈雷彗星的出现。
He predicted the appearance of the #et in 1758, sixteen years after his death.
他成功预测了他去世后16年，即1758年哈雷彗星的出现。
Halley's #et is extremely bright and has two tails. Its latest return was in 1986.
璀璨明亮的哈雷彗星有两条彗尾，最近一次回归是在1986年。
A Second Solar System
第二个太阳系
Scientists have found a second solar system in the universe.
科学家在宇宙中发现了第二个太阳系。
What's the second solar system?
什么是第二个太阳系？
It's just a system like ours-with a star and a number of planets going around it.
就跟我们的太阳系一样，有一个恒星和围着恒星转的几颗行星。
Is this good news or bad news?
这是好事还是坏事？
It's exciting news!
这是激动人心的消息。
If we find a second solar system, we might find a second earth!
如果我们能发现第二个太阳系，兴许就能发现第二个地球。
You mean with people on it?
你是说上面有人住的？
Yes! Isn't that exciting?
对啊。这难道还不让人激动吗？
A Second Solar System
第二个太阳系
Scientists have found a second solar system in the universe.
科学家在宇宙中发现了第二个太阳系。
What's the second solar system?
什么是第二个太阳系？
It's just a system like ours-with a star and a number of planets going around it.
就跟我们的太阳系一样，有一个恒星和围着恒星转的几颗行星。
Is this good news or bad news?
这是好事还是坏事？
It's exciting news!
这是激动人心的消息。
If we find a second solar system, we might find a second earth!
如果我们能发现第二个太阳系，兴许就能发现第二个地球。
You mean with people on it?
你是说上面有人住的？
Yes! Isn't that exciting?
对啊。这难道还不让人激动吗？
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