简介：
Earth and Moon Had Same Water Source
地月之水同根生
Isotopic analysis of water trapped in volcanic glass in lunar samples show that the moon has more water than thought, and the water there and on Earth had the same origins.
研究人员对月球火山玻璃样本中的水进行了同位素分析，发现月球上水的储量比我们之前认为得更多，并且，地球和月球上的水有着相同的起源。
撰文/播音 凯伦•霍普金(Karen Hopkin)
It’s sad but true: the moon is not made of cheese. But it still holds some fascinating surprises. Because a recent study finds that the moon harbors more water than was previously thought, and that this lunar H2O appears to hail from the same source as the water on Earth. That’s according to work published online, in the journal Science Express. [Alberto E. Saal et al., Hydrogen Isotopes in Lunar Volcanic Glasses and Melt Inclusions Reveal a Carbonaceous Chondrite Heritage]
月亮的确不是奶酪做的，这多少令我们有些伤心。然而，这并不妨碍它给我们带来其他的奇妙惊喜。最近的一项研究发现，月球上的水比我们曾经想象得更多，并且，这些水与地球上的水有着同样的起源。这项研究发表在《科学快报》杂志的网站上。
The moon is thought to have formed by a violent collision between a spacefaring rocky body and the proto-planet Earth. It was also assumed that the heat of this impact would have caused any water, or its constituent elements, to boil off into space, leaving the baby moon high and dry.
一般的观点认为，月球是太空中一颗飞来的岩石撞击地球原行星后形成的。人们同时假使，冲撞产生的高温使得地球上的水和其他组分汽化后流散进入太空，因此，襁褓中的月球也应是滚烫而干燥的。
But recent studies have found that samples of volcanic glass, brought back from the moon on the Apollo missions, contain as much water as magma found here on Earth. Now, by examining the isotopic composition of that water, researchers have found that it matches that of meteorites, the likes of which also delivered Earth its first drink.
然而最近的一项研究发现，由“阿波罗登月计划”带回地球的的火山玻璃样品，与地球岩浆有着相同的水含量。研究人员对比了月球之水与地球陨石上的水，发现两者的同位素组成是相同的，而正是这些陨石的降临，为地球送来了第一汪生命之泉。
The simplest explanation is that our planet was all wet before the impact that gave rise to its satellite. Next mystery to unravel: how did the moon manage to maintain that moisture?
对这一现象最为简单的解释是，我们的星球在月球诞生的那次撞击之前，是完全被水所覆盖的。然而，下一个等待解释的谜题又出现了：月球是怎么保持这些水分的？
（题图来源：http://sailormoonnews.com/）
