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教咗天文學的 lecture 多年，專於行星的我終於要改口叫八大行星。International Astronomical Union 終於下了定案，把冥王星從新定位為 dwarf planet 。
Print | posted on Friday, 25 August, 2006 12:03 AM | Filed Under [ 天文帝國之興亡 ]
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