三分飞艇

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                揽星九天 天问探火

                2020年7月下旬,我国首次自主火星探测“天问1号”任务将拉开大幕。“天问1号”发射后,将经过7个月〇左右的飞行到达火星,并在火星着陆并展开巡视,一次性完成“绕、落、巡”。这是世界上首个第一次火星探测就完成三大目标的●任务,起点高、难度大。

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