一百萬年才過一次年！「一年」最長的行星！#shorts #系外行星 #天文 #宇宙 #宇宙科學 #冥王星
Synopsis
地球繞太陽一圈就是一年，不同的行星有自己不同的「一年」。像水星這種距離太陽比較近，軌道比較小的行星，它的「一年」只有 ...
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