地月系统中，探月航天器运动的简单的数学模型，月球绕地运动近似为匀速圆周运动，程序中各天体坐标可以在JPL的星历表中查询修改。(In the Earth Moon system, the simple mathematical model of lunar exploration spacecraft motion is similar to the uniform motion around the moon. The coordinates of celestial bodies can be