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.
(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
The shortest distance at which a satellite not held together by any force other than its own gravity can orbit another celestial body without being torn apart by the tidal force between them. The distance depends on the densities of the two bodies and the orbit of the satellite. If the satellite and the object are of similar densities, the Roche limit is about two and a half times the radius of the larger object. Since most natural satellites are rigid bodies, their tensile strength allows them to orbit much closer than their Roche limit; however, rigid bodies too may be broken up by tidal forces. The rings surrounding Saturn and the other gas giants in the outer solar system may be the orbiting debris of moons that approached much closer than the Roche limit and were fragmented by tidal forces. The limit is named after the French mathematician Edouard Roche (1820-83).
noun 1. La. La Rochelle. 2. a female given name: from a French word meaning “small rock.”. noun 1. a seaport in and the capital of Charente Maritime, in W France; besieged while a Huguenot stronghold 1627–29. noun 1. a port in W France, on the Bay of Biscay: a Huguenot stronghold until its submission […]
- Rochelle powder
/rɒˈʃɛl/ noun 1. another name for Seidlitz powder
noun 1. (not in technical use) Seidlitz powders.
noun, Chemistry, Pharmacology. 1. a colorless or white, water-soluble solid, KNaC 4 H 4 O 6 ⋅4H 2 O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative. Rochelle salt noun 1. a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: […]