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NASA科学家：木卫二欧罗巴是寻找外星生命的最佳地点之一

趣科技 2020-06-25 11:23:09 转载来源: cnBeta.COM

据外媒CNET报道，美国宇航局（NASA）研究人员表示，新的模型显示，木卫二欧罗巴的内部海洋应该能够支持生命。长期以来，人们一直怀疑欧罗巴的水域位于其冰壳之下，并被潮汐运动或月球地下地质的某些元素影响，可能适合居住

据外媒CNET报道，美国宇航局（NASA）研究人员表示，新的模型显示，木卫二欧罗巴的内部海洋应该能够支持生命。 长期以来，人们一直怀疑欧罗巴的水域位于其冰壳之下，并被潮汐运动或月球地下地质的某些元素影响，可能适合居住。

在这项最新的研究中，来自NASA喷气推进实验室的科学家使用伽利略任务的数据来模拟欧罗巴隐藏层的组成和其他物理特征，包括其地下海洋。他们发现，这个世界的海水可能并不像以前认为的那样酸性。

“我们的模拟，加上哈勃太空望远镜的数据，显示欧罗巴表面的氯化物，表明水很可能变得富含氯化物，”首席研究员Mohit Melwani Daswani在一份新闻稿中解释说。“换句话说，它的成分变得更像地球上的海洋。我们相信，这种海洋可能相当适合生命居住。”

这项研究周三在虚拟的Goldschmidt地球化学会议上发表，尚未经过同行评审。

科学家此前发现土卫二Enceladus上也有一个隐藏的海洋，并且在其水域中检测到了复杂的有机化合物，这些化合物是生命的构成要素之一。

“当然，有趣的化学反应发生在这些体内，”没有参与这项工作的科罗拉多大学地质学教授Steve Mojzsis说，“但在寒冷、黑暗的深处，有什么可靠的电子流可以被外星生命用来为自己提供动力？使一个世界‘宜居’的一个关键方面是维持这些化学不平衡的内在能力。可以说，冰冷的卫星缺乏这种能力，所以这需要在未来任何前往欧罗巴的任务中进行测试。”

幸运的是，这样的任务很快就会出现。“欧罗巴是我们在太阳系中寻找生命的最佳机会之一，”Daswani说。“NASA的欧罗巴Clipper任务将在未来几年内启动，因此我们的工作旨在为该任务做准备，该任务将调查欧罗巴的宜居性。”

标签: NASA 科学家木卫二欧罗寻找外星生命最佳地点

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