Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换方与约束方时的,提出了定常约束与定常系统判据的同表述。
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NASA's Lucy mission will study the pristine Trojan asteroids, the remnants of our solar system that have been gravitationally trapped around Jupiter's Lagrange Point number four and Lagrange Point number five for over four and a half billion years.
NASA 的 Lucy 任务将研究原始的特洛伊小行星,这是我们阳系的残余物,它们被引力困在木星的朗点 4 号和朗点 5 周围超过 45 亿年。