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How big is 赛德娜?

1,000 千米!

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赛德娜

Sedna 有非常椭圆的轨道, 要花上 10000 地球年才能绕行一圈. 你可能发现 "Sedna"倒过 来是 "Andes", 也就是世界最长的安地斯山脉. (位在南美洲.) 两个看起来都很脱俗!

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宇宙的刻度 > 赛德娜

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