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orbit
- 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