The Roche Limit罗切极限
The Roche Limit is the radius inside which a satellite, held together only by its gravity, will disintegrate under the tidal forces of the body about which it is orbiting. 洛希极限是这样一个半径，当卫星仅由自身引力维持时，若处于该半径以内，它将在围绕其轨道运行的天体的潮汐力作用下解体。
Online references: 在线参考：维基百科：罗契极限 |
Index References: Carroll & Ostlee Ch 19 索引参考：Carroll & Ostlee 第19章 | ||
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Roche Lobes罗切洛贝斯
When you draw a set of equipotential curves for the gravitational potential energy for a small test mass in the vicinity of two orbiting stars, there is a critical curve shaped like a figure-8 which can be used to portray the gravitational domain of each star. If you rotate the figure-8 around the line joining the two stars, you produce two lobes known as Roche lobes, after the French mathematician Edouard Roche. 当你为两个绕轴旋转的恒星附近的小测试质量绘制一组等势曲线时，会出现一个形状像8字的临界曲线，可以用来表示每个恒星的引力领域。如果将这个8字形绕两颗恒星之间的连线旋转，就会产生两个称为罗契瓣的叶状结构，以法国数学家埃杜瓦·罗契（Edouard Roche）命名。
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Index References: Kaufmann Ch 21 索引参考：Kaufmann 第21章 | ||
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