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【宇宙杂谈】太阳系八大行星中最神秘的行星！
太阳系八大行星中哪个最神秘？是已经“死去”的火星，还是温室效应爆表的金星？是有着巨大行星环的土星，还是像熊孩子一样躺着自转的天王星？可能和你想的不一样，对于很多天文学家来说，他们会把票投给水星。为什么呢？
【宇宙杂谈】38/114
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