Invariable plane

Inclination to the invariable plane for the giant planets
Year JupiterSaturnUranusNeptune
20090.32°0.93°1.02°0.72°
1424000.48°0.79°1.04°0.55°
1680000.23°1.01°1.12°0.55°

The invariable plane of a planetary system, also called Laplace's invariable plane, is the plane passing through its barycenter (center of mass) perpendicular to its angular momentum vector.

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