“双星”是指在天文学上两个相距较近、由于彼此引力的作用而沿轨道相互环绕的恒星系统.一、双星模型原形及特征1.模型原形如图1所示,双星系统是两个天体以两者连线上的某一点为圆心做匀速圆周运动,两个圆的圆心重合,两个圆轨道为同心圆,它们的位置相对不变,距离不变. “Double Star ” refers to two astrophysical star systems that are close to each other and are orbiting around each other due to their gravitational attraction: 1. Prototype and Features of Binary Star Model 1. The prototype of the model is shown in Figure 1. The binary system is The two celestial bodies make a constant circular motion at a certain point on the connection between the two celestial bodies. The centers of the two circles coincide with each other, and the two circular orbits are concentric circles. Their positions are relatively unchanged and their distances remain unchanged.