Uranus spins once in about 17.2 hours — a short day for a world whose year spans decades — so cloud features race around while seasons crawl.
Radio and Voyager data pinned that period despite the planet’s featureless haze. Because the spin axis lies near the orbital plane, “day” and “season” geometries intertwine in ways Earth never sees.
Rotation sets weather belts. Uranus proves an ice giant can have a workday-length spin even while its solar calendar stretches across a human lifetime.
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