When a variable star periodically changes its luminosity, many of its properties also change. Which of these does NOT change?

Name: When a variable star periodically changes its luminosity, many of its properties also change. Which of these does NOT change?
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Quizplus · Accepted Answer

The rotation rate of a variable star does not change as a result of its periodic changes in luminosity. These changes are typically caused by variations in size, temperature, and radial surface speed, but the star's rotation rate remains constant.

When a Variable Star Periodically Changes Its Luminosity, Many of Its