Why do red giant stars form?

1 Answer

Red giant is a stage i n the life of stars.


Stars like Sun is in equilibrium forces keep it in such condition.
The pressure from fusion pushes the sun outwards and gravity pulls inwards..At the end of main sequence the mass become less,So gravity is reduced and the fusion reaction pushes it outwards .this make the star very huge in size with less temperature.This state is known as red giant sate.