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Author Topic: NASA宣布40光年外发现7颗类地行星 3颗或有液态水  (Read 149 times)
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February 23, 2017, 03:54:58 AM
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NASA宣布,发现7个跟地球尺寸大小相似的行星,绕行着TRAPPIST-1恒星的轨道运行,有可能是太阳系之外,适合人居的地方。(图:美联社)
新华社洛杉矶2月22日电(记者郭爽)美国航天局22日宣布,一个国际天文学家小组发现,在距地球仅40光年外发现围绕单一恒星运行的7颗系外行星。天文学家认为,这一酷似太阳系的行星系,堪称迄今寻找外星生命的最佳地点。
美国航天局副局长托马斯·楚比兴当天在华盛顿召开的新闻发布会上说:“这一发现提示我们,寻找第二个地球不是‘能否’的问题,而是‘何时’的问题。”
借助美国航天局斯皮策望远镜和地面观测等方式,一个国际天文研究小组在宝瓶星座中发现了7颗围绕矮星TRAPPIST-1运转的行星。其中3颗已确定位于宜居带,很可能含有液态水。
美国航天局表示,这是在太阳系外环绕单一恒星发现的最大数量位于宜居带的行星。
“我们发现围绕一颗低温小恒星运转着7颗岩态行星,它们与地球大小相似,均可能包含液态水——这些都是我们已知的生命存在的要素,”美国航天局随后在推特网站发帖说。
这一由美国、比利时、英国等国科学家联合研究的结果当天发表在《自然》杂志上。
报告主要作者、比利时列日大学TRAPPIST系外行星项目主要研究人员米夏埃尔·吉隆说:“这7颗围绕TRAPPIST-1运转的行星,是已知第一批围绕这种类型恒星运转的地球大小的行星。”(完)
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February 23, 2017, 05:12:24 AM
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四十光年啊,5万公里每小时时速到那也就九十来万年,指日可待啊!

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February 23, 2017, 05:31:22 AM
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一瞬间想到了那句话“宇宙就是一个黑暗森林,每个文明都是带枪的猎人。”
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February 23, 2017, 11:39:36 AM
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新希望
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February 23, 2017, 12:14:47 PM
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希望能寻找到外星人

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