火箭是以热气流高速向后喷出,利用产生的反作用力向前运动的喷气推进装置。它自身携带燃烧剂与氧化剂,不依赖空气中的氧助燃,既可在大气中飞行,也可在外层空间飞行。因火箭最早用于发射箭矢,因此中文称为火箭。火箭在飞行过程中随着火箭推进剂的消耗,其质量不断减小,是变质量飞行体。火箭能使物体达到宇宙速度,克服或摆脱地球引力。现代火箭可用作快速远距离运送工具,如作为探空、发射人造卫星、载人飞船、空间站的运载工具,以及其他飞行器的助推器等,如用于投送作战用的战斗部(弹头),便 The rocket is a jet propulsion device that sprays backward at high speed with hot air flow and moves forward by utilizing the generated reaction force. It carries its own combustion agents and oxidants and does not rely on oxygen in the air for combustion, either in the atmosphere or in outer space. Because the rocket was first used to launch an arrow, the Chinese is called a rocket. With the rocket propellant consumption during the flight, the mass of the rocket is continuously reduced, which is a variable mass flight body. Rocket can make objects reach the speed of the universe, to overcome or get rid of the Earth’s gravity. Modern rockets can be used as fast and long-range means of delivery such as sounding, launching artificial satellites, manned spacecraft, space station vehicles, boosters for other aircraft and the like, such as warheads for warfare ), Then