A planet is a celestial body orbiting a star.
行星是环绕著恒星公转的天体。
The highest point reached in the apparent motion of a celestial body.
天顶一个天体的明显运动达到最高点。
Of or relating to a celestial body, especially an asteroid, that is in one of the Lagrangian points of a two-body system.
特洛伊银河体系:为双体系统中拉格朗日点上一个天体的,尤指小行星,或与之相关的。
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