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SSS 2009-08-27

时间:2010-05-18 06:29来源:互联网 提供网友:mark@li   字体: [ ]
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    (单词翻译:双击或拖选)

A planet has been discovered about 325 light-years away. But what’s really interesting is that it shouldn’t exist. The planet is called WASP1-18b, because it was observed by a project called WASP, the Wide Area Search for Planets. It has 10 times the mass of Jupiter, and orbits its star in less than one earth day. Because it’s crazy close to its star, only 1.4 million miles. We’re 93 million miles from the sun.

Tidal interactions should have stretched the star and slowed the planet to the point where they smashed into each other a long time ago. The research is in the August 27th issue of the journal Nature. [Scientific American is part of the Nature Publishing Group.]

WASP-18b is part of a class of planets called “hot Jupiters,” which are thought to have formed a great distance from their home stars and then migrated inward.

Researchers say this particular planet has been around for about a billion years. We may have caught it in its death throes. Or, there are unknown factors keeping the star and planet from colliding. So astrophysicists intend to keep a close eye on WASP-18b, to either catch the orbit decaying or figure out why it isn’t.

—Cynthia Graber
 


点击收听单词发音收听单词发音  

1 wasp sMczj     
n.黄蜂,蚂蜂
参考例句:
  • A wasp stung me on the arm.黄蜂蜇了我的手臂。
  • Through the glass we can see the wasp.透过玻璃我们可以看到黄蜂。
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TAG标签:   SSS  orbit
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