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• Hugo Award for Best Novel (1983)
• Nebula Award Nominee for Best Novel (1982)
• Locus Award for Best Science Fiction Novel (1983)

Traditional Chinese first edition can be found HERE基地紀元四九八年，兩名基地公民登上最先進的太空艇，準備進行一次極不尋常的銀河之旅。表面上，他們將尋找傳說中的人類原鄉，實際的任務，則是要證明第二基地依舊存在。與此同時，銀河中又出現一個神祕的第三勢力。他們行事神出鬼沒，法力廣大無邊，甚至連預示銀河未來命運的謝頓計畫，似乎也在這個組織掌握之中。到底是由於機緣巧合，還是經過精心的安排，兩個基地與神祕的第三勢力，最後竟然在一顆稱為蓋婭的行星交會！銀河未來終極的命運，即將在他們眼前揭示……

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