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太阳系“老九” 到底是找不到还是不存在
source link: https://tech.sina.com.cn/d/s/2019-06-27/doc-ihytcerk9604089.shtml
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来源：科技日报不知不觉，距离上一次在太阳系内发现行星已过去了170多年。如果能在太阳系内发现新的行星，或许是可以获得诺贝尔奖的事。不过，自1846年海王星被发现以后，相当长一段时间内，几乎没有人再去寻找新的行星，因为能找到的机会十分渺茫。近
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