* * *
Universalium. 2010.
barycentric coordinate system — /bar euh sen trik/, Math. a coordinate system for an n dimensional Euclidean space in which each point is represented by n constants whose sum is 1 and whose product with a given set of linearly independent points equals the point. [ < Gk… … Useful english dictionary
Barycentric Coordinate Time — (TCB) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to orbits of planets, asteroids, comets, and interplanetary spacecraft in the Solar system. It is equivalent to the proper … Wikipedia
Coordinate system — For geographical coordinates on Wikipedia, see Wikipedia:WikiProject Geographical coordinates. In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of a point or other… … Wikipedia
Barycentric Dynamical Time — (TDB) was a time standard used to take account of time dilation when calculating orbits of planets, asteroids, comets and interplanetary spacecraft in the Solar system. It was based on a Dynamical time scale but was not well defined and not… … Wikipedia
Barycentric — can refer to:In astronomy, * Barycentric coordinates (astronomy) are coordinates defined by the common center of mass of two or more bodies * Barycentric Dynamical Time was a time standard in the Solar system * Barycentric Coordinate Time is a… … Wikipedia
Coordinate time — In the theory of relativity, it is convenient to express results in terms of a spacetime coordinate system relative to an implied observer. In many (but not all) coordinate systems, an event is specified by one time coordinate and three spatial… … Wikipedia
Barycentric coordinates (astronomy) — In astronomy, barycentric coordinates are non rotating coordinates with origin at the center of mass of two or more bodies.Within classical mechanics, this definition simplifies calculations and introduces no known problems. In the General Theory … Wikipedia
System time — Unix date command In computer science and computer programming, system time represents a computer system s notion of the passing of time. In this sense, time also includes the passing of days on the calendar. System time is measured by a system… … Wikipedia
Geocentric Coordinate Time — (TCG) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to precession, nutation, the Moon, and artificial satellites of the Earth. It is equivalent to the proper time experienced … Wikipedia
Time dilation — This article is about a concept in physics. For the concept in sociology, see time displacement. In the theory of relativity, time dilation is an observed difference of elapsed time between two events as measured by observers either moving… … Wikipedia
