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abstraction > mathematical concept > geometrical object > plane > equator > galactic equator
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galactic equator comparison table
Subject is a kind of has definition
equatorplaneThe great circle on the surface of a body formed by the intersection of the surface with the plane passing through the center of the body perpendicular to the axis of rotation. (See celestial equator.)
galactic equatorequatorThe primary circle defined by the central plane of the Galaxy.

Next equatorcelestial equator    Upequator