戳视频↑↑↑看“天问一号”如何赴“火星之约” 如今，“天问一号”探测器的“奔火旅途”进行到了哪一步？ 10月9日23时，在我国首次火星探测任务飞行控制团队控制下，“天问一号”探测器主发动机点火工作480余秒，顺利完成深空机动。 什么是深空机动？ 探测器调姿示意图 /图源：国家航天局 为了减小飞行偏差，使探测器沿着预定的轨道飞行而进行的轨道控制称作修正。 而改变探测器当前轨道，使其进入一条新的轨道而进行的轨道控制称作机动。 此次轨道机动在距离地球大约2940万千米的深空实施，因而被称为深空机动。 探测器深空机动轨道示意图 /图源：国家航天局 通过深空机动，可以改变探测器原有的飞行速度和方向，使其能够沿着变轨后的轨道顺利飞行至火星。 China's Mars probe Tianwen-1 successfully conducted a major deep-space maneuver on Friday night (Beijing time), changing its orbit, according to the China National Space Administration. The probe completed the maneuver at 11 p.m. after its main engine worked for over 480 seconds. The operation adjusts the flying speed and direction of the probe to enable its accurate rendezvous with the Red Planet. The maneuver, which took place 29.4 million kilometers from Earth, is by far the most difficult one since the launch of the probe in July. Rao Wei, product manager of the Mars rover products from China Academy of Space Technology, said this is the third time that Tianwen-1 has fired its engine to correct its course. During the previous maneuvers, the engine ignition lasted just 10 seconds. During Friday's operation the engine fired for more than eight minutes. “奔火旅途”还有多久？ 自7月23日发射升空，踏上“奔火旅途”以来，“天问一号”探测器已经完成了好几项大任务。 先是充当了一回“摄影师”，给地球和月亮拍了张合影。 7月27日，天问一号探测器在飞离地球约120万公里处，利用光学导航敏感器拍摄了一张黑白地月合影。/图源：国家航天局 又分别在8月2日和9月20日完成了两次轨道中途修正。 最近，它还在深空来了一次“自拍”。 10月1日，国家航天局发布“天问一号”探测器飞行图像。/图源：国家航天局 那么“天问一号”何时能和火星“相会”呢？ 据国家航天局介绍，“天问一号”探测器将在当前轨道飞行约4个月后与火星交会，期间将实施两到三次轨道中途修正。 Going forward, the probe will travel along the Earth-Mars transfer orbit for about four months and complete two or three mid-course orbital corrections before reaching Mars. China launched the Mars probe on July 23. It was designed to complete orbiting, landing, and roving in one mission. The probe will reach the Red Planet around February 2021. It has successfully captured a photo of Earth and the moon and completed mid-course orbital corrections twice, as well as self-checks on multiple payloads. 推荐阅读：“天问一号”探测器完成第二次轨道中途修正 “天问”，问天！天问一号！火星，我们来了！