EPISODE · Sep 11, 2006 · 8 MIN

Vol.43 太陽系の再編

2006年は天文学史に残る年となるでしょう。人類史上はじめて、「惑星とは何か」が正式に決められたのです。8月24日、国際天文学連合の第26回総会で、「太陽系における惑星の定義」が承認されました。

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Vol.43 太陽系の再編

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