Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变与显含时的等价性,提出了定与定系统判据的等同表述。
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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,这是我们太阳系的残余物,它们被引力困在木星的拉格 4 号和拉格 5 周围超过 45 亿年。