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【新闻快讯】
12月14日21时11分嫦娥三号探测器成功落月，中国探测器首次登上地外天体，这标志着我国已成为世界上第三个实现月球软着陆的国家。落月是从15公里高度开始的。大约11分钟的落月过程中，嫦娥三号依靠自主控制，经过了主减速段、快速调整段、接近段、悬停段、避障段、缓速下降段6个阶段，相对速度从每秒17公里逐渐减为0。在距离月面100米高度时，探测器暂时停下脚步，利用敏感器对着陆区进行观测，以避开障碍物、选择着陆点。在以自由落体方式走完最后几米之后，平稳“站”上月面的4条着陆腿触月信号显示，嫦娥三号完美着陆月球虹湾地区。这是人类第130次探月活动。12月2日1时30分发射升空的嫦娥三号是我国发射的第一个地外软着陆探测器和巡视器，也是在1976年苏联“月球24号”探测器登陆月球后第一个重返月球的人类探r