ecliptic coordinate system definition of ecliptic coordinate system in the Free Online Encyclopedia.

ecliptic coordinate system, an astronomical coordinate system astronomical coordinate systems. A coordinate system is a method of indicating positions. Each coordinate is a quantity measured from some starting point along some line or curve, called a coordinate axis.
..... Click the link for more information. in which the principal coordinate axis is the ecliptic ecliptic , the great circle on the celestial sphere that lies in the plane of the earth's orbit (called the plane of the ecliptic). Because of the earth's yearly revolution around the sun, the sun appears to move in an annual journey through the heavens with the
..... Click the link for more information. , the apparent path of the sun through the heavens. The ecliptic poles are the two points at which a line perpendicular to the plane of the ecliptic through the center of the earth strikes the surface of the celestial sphere celestial sphere, imaginary sphere of infinite radius with the earth at its center. It is used for describing the positions and motions of stars and other objects.
..... Click the link for more information. . The north ecliptic pole lies in the constellation Draco.

ecliptic coordinate system [i′klip·tik kō′ȯrd·ən·ət ‚sis·təm]

(astronomy)

A celestial coordinate system in which the ecliptic is taken as the primary and the great circles perpendicular to it are then taken as secondaries.

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