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Loading contentStars spin, and how fast they spin shapes their lives. Rotation mixes fresh fuel into the core, flattens the star, powers magnetic dynamos, and drives mass loss; it can be measured from the broadening of spectral lines and, for the internal rotation hidden beneath the surface, from asteroseismology.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
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