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美国佛罗里达州卡纳维拉尔角空军基地。一架火箭喷射着炽热的尾焰,呈抛物线状从天而降。从无边的黑夜远远望去,如同一颗火流星,划破天际。临近着陆,火箭喷射出的反推力,与自身重力保持均衡,巨大的气浪将周围的尘土吹起,浓烟滚滚。火箭发展史上的里程碑,就在这滚滚浓烟里树起——美国当地时间2015年12月21日晚,人类第一次实现轨道运载火箭垂直回收。由美国太空探索公司(SpaceX)研制的“猎鹰9号”火箭,携带11颗通信卫星,在发射升空至200千米高度后,一级
Cape Canaveral Air Force Base, Florida, USA. A rocket sprays a glowing tail flame, parabolically falling from the sky. From the boundless night looked from afar, like a meteor, across the sky. Adjacent to the landing, the rocket jet thrust backwards, and their own gravity to maintain a balance, a huge wave of air around the dust blowing, smoke billowing. The milestone in the development history of the rocket arose in the billowing smoke. For the first time in the United States, on the evening of December 21, 2015, mankind realized the vertical recovery of orbital launch vehicles. The “Falcon 9” rocket, developed by SpaceX, carried 11 communications satellites and was launched at an altitude of 200 km. The first stage