Roche limit

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Roche limit

 (rōsh)
n.
The smallest distance at which a natural satellite can orbit a celestial body without being torn apart by the larger body's gravitational force. The distance depends on the densities of the two bodies and the orbit of the satellite.

[After Edouard Albert Roche (1820-1883), French mathematician.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Roche limit

(rɒʃ)
n
(Astronomy) astronomy the distance from the centre of a body, such as a planet, at which the tidal forces are stronger than the mutual gravitational attraction between two adjacent orbiting objects
[C19: named after E. A. Roche (1820–83), French mathematician]
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The December 1996 edition - number 14 - featured Roche limits, planetary albedo, stable planetary moon systems, numerical integration, thermal inertia, geodesy, and even a list of World Wide Web sites about asteroids.