天体运动侧重于研究匀速圆周运动，解答天体运动问题的关键是熟练掌握以下两招：①万有引力充当向心力宇宙天体、卫星都是在万有引力作用下运动的，且万有引力是他们作环绕运行的唯一束缚力．分析天体类问题。首先要从这一点出发．包括以此为背景的新颖信息题(如黑洞)莫不如此．天体作匀速圆周运动时所需向心力是由万有引力充当的． The celestial body focuses on the study of uniform circular motions. The key to answering the celestial motion problem is mastering the following two methods: 1 Gravity acts as a centripetal force, and the satellites move under gravity and the universal gravitation is their only binding force for orbital movement. . Analyze the problem of celestial bodies. Begin by starting from this point. Including novel information topics (such as black holes) on this background are not the same. The centripetal force required for a uniform circular motion of the celestial body is actuated by gravitation.