Question

why do stars evolve?​

Answer 1

Answer:

Because when you dump energy into a normal gas (in this case the star's envelope), the pressure that gas exerts increases. ... And so generally speaking,stars evolve from the main sequence over toward the upper right quadrant of the H-R diagram, eventually becoming giant or supergiant stars.

Answer 2

Because when you dump energy into a normal gas (in this case the star's envelope), the pressure that gas exerts increases. ... And so generally speaking, stars evolve from the main sequence over toward the upper right quadrant of the H-R diagram, eventually becoming giant or supergiant stars.

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