所谓多星模型,是指两个或两个以上的星体围绕着某一圆心以相同的角速度做匀速圆周运动。其特点是多个星体具有共同的圆心,且间距不变,向心力大小不变、运动的角速度、周期、线速度的大小、向心加速度的大小都不变。其他天体距它们很远,其影响可以忽略不计。这类问题在近几年高考试题中出现的频率较高,再归类分析。由于两星模型大家讨论得比较多,因此本文中的多星模型特指三星模型和四星模型。 The so-called multi-star model, refers to two or more stars around a center of a circle at the same angular velocity uniform circular motion. It is characterized by a number of stars with a common center, and the same distance, the centripetal force of the same size, the movement of the angular velocity, periodic, linear velocity, centripetal acceleration are the same size. Other celestial bodies are far away from them and their effects are negligible. Such problems in recent years college entrance examination questions appear more frequently, and then classified analysis. As two-star model we discuss more, so this article multi-star model specifically refers to the Samsung model and four-star model.