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SSS 2009-09-24

时间:2010-05-19 01:23来源:互联网 提供网友:mark@li   字体: [ ]
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For all you space buffs who like to keep track of where the water is, it looks like you can add our very own moon to your list. Because according to a trio of papers appearing in the journal Science, the lunar surface is wetter than we realized.

Forty years ago, Apollo astronauts brought a bunch of moon rocks back home. For the most part those samples showed no traces of water whatsoever1. Those that seemed even the slightest bit moist were thought to have been contaminated by water from Earth—because the containers they were stored in turned out to be leaky.

But now scientists say they’ve spotted2 water right on the moon’s surface. Using instruments on three different spacecraft, the scientists detected the chemical signature of good old H2O. And they think the water springs from the moon itself. The lunar soil is nearly 50 percent oxygen, and the scientists think that hydrogen comes from the solar wind that pounds the moon’s surface.

Put the two together and you get wet. Not too wet, of course. There’s probably only about a quart of water in every ton of lunar soil. That’s dryer3 than the Sahara. But wetter than we thought.

 


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1 whatsoever Beqz8i     
adv.(用于否定句中以加强语气)任何;pron.无论什么
参考例句:
  • There's no reason whatsoever to turn down this suggestion.没有任何理由拒绝这个建议。
  • All things whatsoever ye would that men should do to you,do ye even so to them.你想别人对你怎样,你就怎样对人。
2 spotted 7FEyj     
adj.有斑点的,斑纹的,弄污了的
参考例句:
  • The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
  • Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。
3 dryer PrYxf     
n.干衣机,干燥剂
参考例句:
  • He bought a dryer yesterday.他昨天买了一台干燥机。
  • There is a washer and a dryer in the basement.地下室里有洗衣机和烘干机。
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TAG标签:   SSS  astronaut
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