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SSS 2010-10-29

时间:2010-11-04 05:55来源:互联网 提供网友:ob8617   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I’m Adam Hinterthuer. Got a minute?

If there's a line in Vegas on the odds1 of life on another planet, now might be a good time to place a wager2. A study in the journal Science examined 166 Sun-sized stars and found nearly one in four had rocky, earth-sized planets in close, earth-like orbits. The finding might chart a new course for extrasolar planet research.

Most planet-formation models predict a “planet desert” within one astronomical3 unit (or the average distance from the Earth to the Sun) of a host star. Gaseous4 planets like Jupiter or Saturn5, which form much farther away, on the cold side of what’s called the “ice line,” are thought to be more common.

But a team of researchers at Hawaii's Keck observatory6 cast their eyes on stars similar to our Sun. Twenty-three percent of those stars had small, rocky planets orbiting right in the range where the predicted “planet desert” should be.

The researchers say their discovery calls for substantial revisions to current astronomical models. It also makes the possibility of life on some similar planet spinning a similar, habitable distance from its sun seem like a better bet.

Thanks for the minute. For Scientific American’s 60-Second Science. I’m Adam Hinterthuer.
 


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1 odds n5czT     
n.让步,机率,可能性,比率;胜败优劣之别
参考例句:
  • The odds are 5 to 1 that she will win.她获胜的机会是五比一。
  • Do you know the odds of winning the lottery once?你知道赢得一次彩票的几率多大吗?
2 wager IH2yT     
n.赌注;vt.押注,打赌
参考例句:
  • They laid a wager on the result of the race.他们以竞赛的结果打赌。
  • I made a wager that our team would win.我打赌我们的队会赢。
3 astronomical keTyO     
adj.天文学的,(数字)极大的
参考例句:
  • He was an expert on ancient Chinese astronomical literature.他是研究中国古代天文学文献的专家。
  • Houses in the village are selling for astronomical prices.乡村的房价正在飙升。
4 gaseous Hlvy2     
adj.气体的,气态的
参考例句:
  • Air whether in the gaseous or liquid state is a fluid.空气,无论是气态的或是液态的,都是一种流体。
  • Freon exists both in liquid and gaseous states.氟利昂有液态和气态两种形态。
5 Saturn tsZy1     
n.农神,土星
参考例句:
  • Astronomers used to ask why only Saturn has rings.天文学家们过去一直感到奇怪,为什么只有土星有光环。
  • These comparisons suggested that Saturn is made of lighter materials.这些比较告诉我们,土星由较轻的物质构成。
6 observatory hRgzP     
n.天文台,气象台,瞭望台,观测台
参考例句:
  • Guy's house was close to the observatory.盖伊的房子离天文台很近。
  • Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。
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