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（华盛顿14日综合电）美国太空总署（NASA）周三宣布，火星探测车“机遇号”（Opportunity）登陆火星15年后“寿终正寝”，其任务随之结束。

NASA与“机遇号”失去联络8个月后，周二晚最后一次尝试唤醒对方，但换来的仍是沉默。

NASA署长布里登斯廷在推特表示，经过800多次的尝试，仍然联络不上“机遇号”，因此宣布“机遇号”的任务“圆满结束”。

去年一场席卷火星的大规模沙尘暴遮挡太阳光，令“机遇号”的太阳能电池断电，进入休眠状态，一直未再启动。

“机遇号”最后一次发出讯号是去年6月10日，NASA去年8月为“机遇号”设下45天“大限”，但引来强烈抗议，NASA将有关日期延至今年。

“机遇号”2003年7月发射，翌年登陆火星，原本只预计它在火星逗留90天，结果执行了近15年任务、走过45公里路程，取得丰富成果，包括发现火星早期存在液态水的重要证据。#

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