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The Sun That Never Flips

For 45 years, astronomers believed that stars like our Sun would eventually flip their rotation pattern as they aged with the poles speeding up and the equator slowing down. It was one of those theoretical predictions that seemed rock solid, written into textbooks and built into stellar models. Now, researchers at Nagoya University in Japan have run the most powerful simulations of stellar interiors ever attempted, and the theory has collapsed. Stars like the Sun, it turns out, seem to keep the same rotation pattern for their entire lives.

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