NASA发现首颗适合人类居住的类地行星 表面温度约为21摄氏度

Jpgcs 于 2011年12月6日 19:10 发表

12月5日,美国宇航局NASA宣布,通过开普勒太空望远镜项目证实了太阳系外第一颗类似地球的、可适合居住的行星。该行星距离地球约600光年之遥,体积是地球的2.4倍。科学家表示,行星的表面温度约为70华氏度(相当于21摄氏度),行星上还可能有液态水,非常适宜生物居住。图为开普勒-22b的想象图。

该行星被命名为开普勒-22b (Kepler-22b),距离地球约600光年之遥,体积是地球的2.4倍,这是目前被证实的从大小和运行轨道来说最接近地球形态的行星,它像地球围绕太阳运转一样每290天环绕着一颗类似于太阳的恒星运转。

“关于这颗行星有两件令人兴奋的事,”开普勒科学队副队长纳塔利·巴塔尔哈说,这颗行星处在“可居住带”之中,它上面的温度既不是太高也不是太低,有可能存在液态水,而且这颗行星环绕着一颗类似太阳的星球运转。

美国宇航局华盛顿总部的开普勒项目科学家道格拉斯·赫金斯说,“这是发现地球的‘双胞胎’之旅上的一个重要里程碑。”不过,科学家们目前还不清楚这颗行星的组成主要为岩石还是气体或液体。

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分类: 航空探索军事工程

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