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Water May Be (Relatively) Plentiful in the Moon's Interior

When astronaut Alan Shepard took his first swing at a golf ball on the moon, he hit more dirt than ball. The dust he kicked up reinforced the idea that the moon is one big sand trap. But looks can be deceiving. Now, scientists reanalyzing lunar samples say that our satellite is at least a hundred times wetter than we thought. The results appear in the Proceedings of the National Academy of Sciences. [Francis McCubbin et al., AxmNO]

當宇航員艾倫·謝潑德在月球上打出第一桿高爾夫球時，他揚起的更多是的沙塵。這也使人們進一步確信月球是一個巨大的沙坑。然而，表面現(xiàn)象是具有迷惑性的。如今，科學家們重新分析月巖樣本時發(fā)現(xiàn)，這顆環(huán)繞地球的衛(wèi)星至少比人們想象的要潮濕一百倍。這一發(fā)現(xiàn)刊載于《美國國家科學院院刊》。（作者：弗朗西斯·麥卡賓等，AxmNO）

Astronauts manning the Apollo missions brought home plenty of moon rocks. And in 40 years of looking at those samples, no one ever found a trace of water. That could be because the collision that made the moon in the first place was so hot that volatile elements like hydrogen, a key component of H2O, largely burned away.

執(zhí)行阿波羅計劃的宇航員們從月球上帶回了許多巖石樣本。經(jīng)過40年的觀察，沒人從中找到水的痕跡。這可能是因為月球形成過程中，撞擊產(chǎn)生的熱能使揮發(fā)性氫元素——水的重要組成成分——大量流失。

Now, using a technique that can identify elements present in just a few parts-per-billion, scientists have taken another look at three lunar samples, two from Apollo missions and one meteorite found in Africa. And they detected hydroxyl, the HO that’s left behind when a rock crystallizes from magma containing water.

如今通過采用一項新技術(shù)觀察含量在百億份率數(shù)量級的物質(zhì)，科學家重新研究了三個月巖樣本，其中兩個是執(zhí)行阿波羅計劃的宇航員從月球帶來的，另一個是在非洲發(fā)現(xiàn)的隕星。科學家們從中找到了羥基，這是由含水巖漿結(jié)晶成巖石遺留下來的。

The results suggest that water may be ubiquitous in the interior of the moon. Although there’s probably not enough to qualify as a water hazard.

這些研究成果表明月球內(nèi)部可能富含水分，盡管這些水分還不足以達到“泛濫”的程度。

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