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La·gran·gi·an point AHD[lə-grānʹjē-ən] D.J.[ləˈgreɪndʒiːən]K.K.[ləˈgrendʒiən]n.（名词）- Astronomy Any of five points, stable with respect to gravitational forces and in the orbital plane of two bodies, one of which is much larger than the other. A third, smaller body placed at one of these points will remain in equilibrium with respect to the other two bodies.【天文学】 拉格朗日点：任五个由于星球引力稳定位于两个星体运行轨道上的点，一个星球较另一个大许多，第三个较小的星体放置于这些点中的任一点都会由于这两个星体的作用力而维持平衡
- After Comte Joseph Louis LagrangeAfter Comte Joseph Louis Lagrange
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