ecliptic coordinate system

ecliptic coordinate system, an astronomical coordinate system in which the principal coordinate axis is the ecliptic , 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 . The north ecliptic pole lies in the constellation Draco.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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