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Planetary rotation is the spinning motion of a planet on its axis, measured by how long one complete turn takes—what defines the length of a day on that world.
In the Psycheverse
Psyche uses planetary rotation as a gateway to astrology's material foundations, treating astronomical facts like Mercury's 58.66-Earth-day rotation not as mere science trivia but as part of understanding how celestial mechanics shape the mythological and astrological properties attributed to planets. The counterintuitive physics becomes a lens for rethinking how ancient occultists might have intuited cosmic order from observable sky patterns.
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