The first steps of evolution off the main sequence are the same for both medium-mass and high-mass stars.

Name: The first steps of evolution off the main sequence are the same for both medium-mass and high-mass stars.
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Both medium-mass and high-mass stars initially expand into red giants or supergiants after exhausting hydrogen in their cores, marking the beginning of their evolution off the main sequence.

The First Steps of Evolution Off the Main Sequence Are