北京时间7月23日12时41分,中国首次火星探测任务“天问一号”开启问天之旅。火星探测器搭乘长征五号遥四运载火箭在中国文昌航天发射场成功发射。此次探索火星任务计划一次性实现“环绕、着陆、巡视”三个目标。如果一切按计划进行,“天问一号”任务将是首个一次性实现环绕、着陆和巡视这三个目标的火星探测任务。此前从未有国家在首次探索火星任务中就做到环绕、着陆和巡视“三连胜”。随着今年三大“探火”项目的相继开展,相关国家会持续加大投入力度,从而在这个涉及“地外资源”的未知领域中占据优势。而在历经7-8个月后,中国的“天问一号”顺利着陆,也将意味着中国在行星探测领域开启新的篇章。
火星是离太阳第四近的行星。在太阳系八大行星中,它的物理性质和化学性质与地球最为相近,拥有高山、平原和峡谷等多种地形,火星一直是人类走出地月系统、开展深空探测的首选目标。
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