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  尋找地外文明 alanmak92 2005-8-21 0 / 2245 2005-8-21 16:41 by alanmak92
  二十一世紀天文學的展望~ alanmak92 2005-8-21 0 / 2292 2005-8-21 16:39 by alanmak92
  太陽風暴與人類生活??? alanmak92 2005-8-21 0 / 2303 2005-8-21 16:38 by alanmak92
  太陽風暴 alanmak92 2005-8-21 0 / 2181 2005-8-21 16:37 by alanmak92
  認識月球la~ alanmak92 2005-8-21 0 / 2203 2005-8-21 16:35 by alanmak92
  恆星的一生~ alanmak92 2005-8-21 0 / 2275 2005-8-21 16:31 by alanmak92
投票 到底有沒有外星人??? alanmak92 2005-8-21 0 / 853 2005-8-21 16:30 by alanmak92
  流星和彗星 alanmak92 2005-8-21 0 / 2223 2005-8-21 16:28 by alanmak92
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