orbital plane

(redirected from planum orbitale)
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Noun1.orbital plane - (astronomy) the plane on which a body is orbiting
astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
plane, sheet - (mathematics) an unbounded two-dimensional shape; "we will refer to the plane of the graph as the X-Y plane"; "any line joining two points on a plane lies wholly on that plane"