Question

why do the stars evolve ​

Answer 1

Answer:

Hey buddy here's ur answer

Stars are undoubtedly large celestial bodies in our universe,they are large sources of energy. This stellar evolution mainly happens due to the unstable physical nature of the star's ecosystem. This instability mainly happens due to the continuous nuclear fusion and fission reactions in those stars.

Answer 2

Answer:

Nuclear fusion powers a star for most of its existence. Initially the energy is generated by a fusion of hydrogen atoms at the core of the main sequence star. This process causes the star to gradually grow in size, passing through the sub giant stage until it reaches the red giant face.