万有引力与航天作为高中物理知识点中一个重要组成部分,因为牵涉的问题多,公式多,同学们在处理具体问题时,往往会出现诸多错误,所以不少学生很害怕这一部分内容。此类题型归根到在万有引力定律的应用。天体环绕运动,为了简化其运动模型,常常把它们处理成匀速圆周运动.在星球表面附近作环绕运动的天体(如近地卫星等),所需要的向心力由星球给天体施加的万有引力提供.而该力又等于天体所受的重力,这样天体的环绕运动就与其它运动形式 Gravity and space as an important part of high school physics knowledge point, because many problems involved, formula, students are often dealing with specific problems, many mistakes, so many students are very scared of this part of the content. This type of question is attributed to the application of the law of universal gravitation. In order to simplify their motion model, celestial bodies are often treated as uniform circular motions, orbiting bodies (such as near-Earth moons) near the surface of the planet, and the centripetal force required by the planet is provided by the gravitation of the celestial bodies The force is equal to the gravity of the celestial body, so celestial body around the movement and other forms of movement