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解惑“直男体育生打✈️gvwww”-知识课堂

金星是否存直男体育生打✈️gvwww在过表面海洋?国际最新天文研究称从来没有形成条件

来源: 澎湃新闻
2024-12-03 16:51:42

最佳回答

“直男体育生打✈️gvwww”金星是否存直男体育生打✈️gvwww在过表面海洋?国际最新天文研究称从来没有形成条件

  中新直男体育生打✈️gvwww网北京12月3日电 (记者 直男体育生打✈️gvwww孙自法)施普林格自然旗下专业学术期刊《自然-天文学》最新发表一篇论文认为,金星内部可能在其大部分历史中都是干燥的,也意味着这个星球可能从来没有过适合海洋形成的条件。这项研究发现,挑战了认为金星曾有过液体表面海洋的假说。

  该论文介绍,金星是一个不宜居的行星,平均表面温度约465C,气压比地球海平面的压力高90倍。但它过去的环境情况人们还不清楚。地球和火星的水日积月累雕刻了地表,而金星不同,它的地表没有明显的水侵蚀的痕迹。对于金星是否一直都很干燥、不宜居,或是否曾有过表面液态水海洋,过去的研究一直有争议。

本篇论文中呈现的此次研究成果科普示意图。施普林格自然 供图

  在本项研究中,论文第一作者兼通讯作者、英国剑桥大学Tereza Constantinou和同事合作,根据金星如今的大气研究了它的过往历史,发现大气层和火山活动释放的气体有关,会反映出行星内部的含水情况。他们用一个化学模型确定了最能反映大气观测结果的金星内部组成,研究发现金星内部缺乏氢,表明它现在比地球内部要干燥得多。

  论文作者指出,这次研究表明,金星可能从来没有过适合海洋形成的条件,大气中存在过的任何水都只是以蒸汽形式存在,最终散佚到了太空中,而非凝结在行星表面。

  他们总结认为,与金星相似的系外行星不太可能拥有液态水或者宜居环境。(完)

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