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科普中国 on MSN
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来自太阳系外的彗星,本来就是从太阳系跑出去的!
来自太阳系外的彗星,有些本来就是从太阳系跑出去的!日本国家天文台(NAOJ)的天文学家,分析了两个永远离开太阳系的天体路径,并确定它们很可能也来自太阳系以外。这些结果提高了我们对外太阳系和更远星际空间的理解。并不是所有彗星都沿着封闭的轨道绕太阳运行, ...
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