More evidence may surface when the Gravity Recovery and Interior Laboratory mission, anAmerican spacecraft designed to map the moons gravitational field, arrives in lunar orbit inaround six months time. That should yield a detailed map of the lunar crust, and how itsthickness varies from place to place. But the best way to check the new hypothesis would befor selenologists to get their hands on rocks from the far side.
当引力恢复和室内实验任务时,更多的证据可能会出现。一架设计用来勘测月球引力场的美国航天器,大约会在六个月内到达月球轨道。这次探测任务应该会产生出一份详细的月球外壳图,以及各个地方的厚度如何变化。但是,对月球学家来说,检查这个新假说的最好方式就是找到月球较远那侧的岩石。
Sadly, that is unlikely to happen soon. Neither America nor Russia has any sample-recoverymissions planned for the moon. China does . But, like the American andSoviet missions of the 1960s and 1970s, the Chinese are expected to opt for the safety of alanding on the near side. Selenologists may therefore have to wait a long time before they cantest the Jutzi-Asphaug model properly.
可叹的是,这种情况不可能很快发生。无论是美国还是俄罗斯都没有任何计划去月球恢复取样的任务。中国倒有一个。但是,像20世纪60年代和70年代的美国和苏联的任务一样,中国人选择在近地侧安全着陆。因此,月球学家可能需要等待很长一段时间才能够真正测试彻奇希-阿萨福格模型。
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