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  人類航天器今天再訪火星!!! alanmak92 2005-8-21 0 / 2499 2005-8-21 16:42 by alanmak92
  尋找地外文明 alanmak92 2005-8-21 0 / 2440 2005-8-21 16:41 by alanmak92
  二十一世紀天文學的展望~ alanmak92 2005-8-21 0 / 2485 2005-8-21 16:39 by alanmak92
  太陽風暴與人類生活??? alanmak92 2005-8-21 0 / 2496 2005-8-21 16:38 by alanmak92
  太陽風暴 alanmak92 2005-8-21 0 / 2368 2005-8-21 16:37 by alanmak92
  認識月球la~ alanmak92 2005-8-21 0 / 2379 2005-8-21 16:35 by alanmak92
  恆星的一生~ alanmak92 2005-8-21 0 / 2459 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 / 2428 2005-8-21 16:28 by alanmak92
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