| 释义 |
radius vector
radius vectorn.1. Mathematics a. A line segment that joins the origin and a variable point in a system of polar or spherical coordinates.b. The length of such a line segment.2. Astronomy A straight line connecting the center of mass of a satellite, such as a planet, moon, or comet, to the center of mass of the body it orbits, such as the sun or Earth. Also called position vector.radius vector n 1. (Mathematics) maths a line joining a point in space to the origin of polar or spherical coordinates 2. (Astronomy) astronomy an imaginary line joining a satellite to the planet or star around which it is orbiting ra′dius vec′tor
n.
pl. radii vec•to•res (vɛkˈtɔr iz, -ˈtoʊr-)
radius vectors. 1. Math. the length of the line segment joining a fixed point or origin to a given point. 2. Astron. a. the straight line joining two bodies in relative orbital motion, as the line from the sun to a planet at any point in its orbit. b. the distance between two such bodies at any point in the orbit. [1745–55] Thesaurus| Noun | 1. | radius vector - a line connecting a satellite to the center of the body around which it is rotatingvector - a variable quantity that can be resolved into components | | 2. | radius vector - a line connecting a point in space to the origin of a polar coordinate systemvector - a variable quantity that can be resolved into components |
radius vector
radius vector (vek -ter) The line, of length r , joining a point on a curve to a reference point, such as the origin in spherical and cylindrical coordinate systems. In planetary motion the radius vector is the line between the position of a planet and the focus of its orbit, i.e. the Sun's position. See also Kepler's laws.Radius Vector The radius vector of an arbitrary point in space is the vector drawn to the point from some fixed point, which is called the pole. If the origin of a rectangular Cartesian coordinate system is selected as the pole, then the projections of the radius vector of a point M on the coordinate axes coincide with the coordinates of M. radius vector[′rād·ē·əs ‚vek·tər] (astronomy) A line joining the center of an orbiting body with the focus of its orbit located near its primary. (mathematics) The coordinate r in a polar coordinate system, which gives the distance of a point from the origin. radius vector
Words related to radius vectornoun a line connecting a satellite to the center of the body around which it is rotatingRelated Wordsnoun a line connecting a point in space to the origin of a polar coordinate systemRelated Words |