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2004年7月1日,卡西尼太空船进入土星(Saturn)轨道,开始进行人类有史以来对土星及其31颗已知卫星最详尽的探测。泰坦(Titan)是土星的卫星,也是太阳系中最大的一颗卫星,它是这次探测中科学家最感兴趣目标之一。卡西尼号揭开了泰坦的神秘面纱。
On July 1, 2004, the Cassini spacecraft entered the Saturn orbit to begin the most detailed exploration ever made of Saturn and its 31 known satellites. Titan is Saturn’s satellite and the largest satellite in the solar system. It is one of the most interesting targets of scientists in this exploration. Cassini opened the mystery of Titan.