rotation about a point
121Terre — Pour les articles homonymes, voir Terre (homonymie). Terre …
122Alhazen — For the Moon crater, see Alhazen (crater). For the asteroid, see 59239 Alhazen. Alhazen Alhazen (Ibn al Haytham) …
123Devil sticks — Children learning the pendulum The manipulation of devil sticks (also devilsticks, devil stixx, flower sticks, devil sticks, rhythm sticks, gravity sticks, or juggling sticks) is a form of gyroscopic juggling or equilibristics, and is generally… …
124Nordström's theory of gravitation — In theoretical physics, Nordström s theory of gravitation was a predecessor of general relativity. Strictly speaking, there were actually two distinct theories proposed by the Finnish theoretical physicist Gunnar Nordström, in 1912 and 1913… …
125Revolution — Rev o*lu tion, n. [F. r[ e]volution, L. revolutio. See {Revolve}.] 1. The act of revolving, or turning round on an axis or a center; the motion of a body round a fixed point or line; rotation; as, the revolution of a wheel, of a top, of the earth …
126Euclidean space — Every point in three dimensional Euclidean space is determined by three coordinates. In mathematics, Euclidean space is the Euclidean plane and three dimensional space of Euclidean geometry, as well as the generalizations of these notions to… …
127Galactic coordinate system — Artist s depiction of the Milky Way galaxy, showing the galactic longitude relative to the sun. The galactic coordinate system (GCS) is a celestial coordinate system which is centered on the Sun and is aligned with the apparent center of the… …
128Laplace–Runge–Lenz vector — Throughout this article, vectors and their magnitudes are indicated by boldface and italic type, respectively; for example, left| mathbf{A} ight| = A. In classical mechanics, the Laplace–Runge–Lenz vector (or simply the LRL vector) is a vector… …
