ellipsoid of rotation

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• Ellipsoid — This article is about the shape. For the type of theatrical spotlight, see ellipsoidal reflector spotlight. For the surface that approximates the figure of the Earth, see reference ellipsoid. triaxial redirects here. For the electrical cable, see …   Wikipedia

• Ellipsoid — Triaxiales Ellipsoid mit (a,b,c) = (4,2,1) Ein Ellipsoid ist die drei oder mehrdimensionale Entsprechung einer Ellipse. Bekannte Beispiele sind die Erde und der Rugbyball als Rotationsellipsoid. Inhaltsverzeichnis …   Deutsch Wikipedia

• ellipsoid — /i lip soyd/, n. 1. Geom. a solid figure all plane sections of which are ellipses or circles. Typical equation: (x2/a2) + (y2/b2) + (z2/c2) = 1. adj. 2. ellipsoidal. [1715 25; < F ellipsoïde. See ELLIPSE, OID] * * * ▪ geometry       closed… …   Universalium

• ellipsoid — el|lip|so|id 〈Adj.〉 ellipsenähnlich, ellipsenförmig * * * El|lip|so|id, das; s, e [zu griech. oeide̅̓s = ähnlich] (Geom.): a) durch Drehung einer ↑ Ellipse (1) um eine ihrer Achsen entstehender ↑ Körper (3 b); b) das Ellipsoid (a) ums …   Universal-Lexikon

• Ellipsoid — El|lip|so|id 〈n. 11; Math.〉 1. zentrisch symmetr. krumme Fläche mit einem Mittelpunkt, durch den drei aufeinander senkrechte Achsen gehen 2. durch Drehung einer Ellipse entstehender Körper [<Ellipse + grch. eidos „Form“] * * * El|lip|so|id,… …   Universal-Lexikon

• Earth ellipsoid — The Earth ellipsoid especially the mean Earth ellipsoid is the mathematical figure of the Earth which is used as a reference frame for computations in geodesy, astronomy and the geosciences.It is a ellipsoid of rotation, whose short (polar) axis… …   Wikipedia

• Absolute rotation — In physics, the consideration of absolute rotation rotation independent of any external reference is a topic of debate about relativity, cosmology, and the nature of physical laws. The question of whether absolute rotation is meaningful is… …   Wikipedia

• Poinsot's ellipsoid — In classical mechanics, Poinsot s construction is a geometrical method for visualizing the torque free motion of a rotating rigid body, that is, the motion of a rigid body on which no external forces are acting. This motion has four constants:… …   Wikipedia

• Reference ellipsoid — In geodesy, a reference ellipsoid is a mathematically defined surface that approximates the geoid, the truer figure of the Earth, or other planetary body.Because of their relative simplicity, reference ellipsoids are used as a preferred surface… …   Wikipedia

• Index ellipsoid — In optics, an index ellipsoid is a diagram of an ellipsoid that depicts the orientation and relative magnitude of refractive indices in a crystal. The equation for the ellipsoid is constructed using the electric displacement vector D and the… …   Wikipedia

• Earth's rotation — is the rotation of the solid Earth around its own axis. The Earth rotates towards the east, which can be observed by orientation with a magnetic compass at sunrise. As viewed from the star Polaris, the Earth turns counter clockwise. Rotation… …   Wikipedia