I have a question concerning this article. It says, “As the sun rotates, its polar regions make a complete circle in about 34 days, compared with the 25 days required by its equator.” I was wondering how it’s possible to have two points on a rotating body take different amounts of time to make a complete revolution.
Mike Crawford Snohomish, Wash.
The sun is a giant ball of gas, not a solid like a planet. Different points rotate at different rates, in a process called differential rotation.
—R. Cowen
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