Roche limit

Roche limit
Roche limit [rōsh]
[after E. Roche (1820-83), Fr astronomer]
the lowest possible altitude at which a natural satellite can form and orbit, withstanding the fragmenting force of the gravitational pull of a planet or other primary celestial body: see also RING2 (n. 14)

English World dictionary. . 2014.

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  • Roche limit — If the primary is less than half as dense as the satellite, the rigid body Roche Limit is less than the primary s radius, and the two bodies may collide before the Roche limit is reached.How close are the solar system s moons to their Roche… …   Wikipedia

  • Roche limit — /rohsh/; Fr. /rddawsh/, Astron. the minimum distance below which a moon orbiting a celestial body would be disrupted by tidal forces or below which a moon would not have formed. [1885 90; named after French astronomer Édouard Roche (1820 83), who …   Universalium

  • roche limit — ˈrȯsh , ˈrōsh noun or roche s limit shə̇z Usage: usually capitalized R Etymology: after E. A. Roche died 1833 French mathematician : the distance between a planet s center and its satellite within which the satellite cannot approach without… …   Useful english dictionary

  • Roche limit — noun Etymology: E. A. Roche died 1883 French mathematician Date: 1889 the distance from a planet s center within which a satellite can neither approach nor reside without becoming disrupted by tidal forces …   New Collegiate Dictionary

  • Roche limit — noun the closest distance which a satellite can approach its parent body without being pulled apart by tidal forces …   Wiktionary

  • Roche Limit —    The minimum distance a satellite can orbit its parent planet without having tidal forces tear it apart …   The writer's dictionary of science fiction, fantasy, horror and mythology

  • Roche lobe — Roche lobe, a gaseous bulge formed in binary stars by each star s gravitational pull on the other. ╂[< E. Roche; see etym. of Roche limit (Cf. ↑Roche limit)] * * * n. Astronomy either of two lobes that form an hourglass shaped volume of space… …   Useful english dictionary

  • Roche — is French for boulder/rock . The word is (part of) several names: Business companies* Roche Applied Science, a business area of Roche Diagnostics, a division of Hoffmann–La Roche AG, Basel, Switzerland, one of the largest pharmaceutical companies …   Wikipedia

  • Roche lobe — The Roche lobe is the region of space around a star in a binary system within which orbiting material is gravitationally bound to that star. If the star expands past its Roche lobe, then the material outside of the lobe will fall into the other… …   Wikipedia

  • roche's limit — noun see roche limit * * * Roche s limit «R shihz, ROH », = Roche limit. (Cf. ↑Roche limit) …   Useful english dictionary

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