curvature of earth
101Public Land Survey System — Seal of the BLM The Public Land Survey System (PLSS) is a method used in the United States to survey and identify land parcels, particularly for titles and deeds of rural, wild or undeveloped land. Its basic units of area are the township and… …
102Deinonychus — This article is about the dinosaur. For the Dutch doom metal group, see Deinonychus (band). Vertebrata Deinonychus Temporal range: Early Cretaceous, 115–108 Ma …
103Schwarzschild metric — In Einstein s theory of general relativity, the Schwarzschild solution (or the Schwarzschild vacuum) describes the gravitational field outside a spherical, non rotating mass such as a (non rotating) star, planet, or black hole. It is also a good… …
104Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …
105Great-circle distance — The great circle distance is the shortest distance between any two points on the surface of a sphere measured along a path on the surface of the sphere (as opposed to going through the sphere s interior). Because spherical geometry is rather… …
106joint — /joynt/, n. 1. the place at which two things, or separate parts of one thing, are joined or united, either rigidly or in such a way as to permit motion; juncture. 2. a connection between pieces of wood, metal, or the like, often reinforced with… …
107radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
108Gauss, Carl Friedrich — orig. Johann Friedrich Carl Gauss born April 30, 1777, Brunswick, Duchy of Brunswick died Feb. 23, 1855, Göttingen, Hanover German mathematician, astronomer, and physicist. Born to poor parents, he was a prodigy of astounding depth. By his early… …
109Dark star (Newtonian mechanics) — This article is about astronomical objects described by Newtonian mechanics. For the modern concept based on dark matter, see dark star (dark matter). For the modern concept based on dark energy, see dark energy star. A dark star is a theoretical …
110spherical sailing — noun : sailing in which the earth is regarded as a spherical or spheroidal figure and allowance is made for the curvature of its surface in directing the course of a ship * * * a method of navigation in which the curvature of the earth is taken… …
