Last Updated
：2025/12/07
invariable plane
（ plural ）
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(astronomy) The orbital plane passing through a planetary system's barycenter (center of mass) perpendicular to its angular momentum vector.
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invariable plane
The simulations showed that the exoplanet's orbit gradually aligned with the system's invariable plane over millions of years.
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The simulations showed that the exoplanet's orbit gradually aligned with the system's invariable plane over millions of years.
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