Ecliptic
Apparent path of the Sun on the celestial sphere / From Wikipedia, the free encyclopedia
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The ecliptic or ecliptic plane is the orbital plane of Earth around the Sun.[1][2][lower-alpha 1] From the perspective of an observer on Earth, the Sun's movement around the celestial sphere over the course of a year traces out a path along the ecliptic against the background of stars.[3] The ecliptic is an important reference plane and is the basis of the ecliptic coordinate system.