it doesn't because the star may be already dead before its ready to become a giant.
main sequence,giant then nebula
After the main sequence, a star becomes a red giant.
A red main sequence star would be a red dwarf or a branch red giant. To be on the main sequence, you have to have hydrogen nuclear fusion.
I am pretty sure it becomes a giant if I'm not mistaken.
The next step in its life is to become a "red giant" star.
The next step in its life is to become a "red giant" star.
A main sequence star burns hydrogen to helium. Once a main sequence star exhausts all of the hydrogen, it begins to expand and burn helium causing if to become a red giant.
No. Red giants are not on the main sequence.
The next step in its life is to become a "red giant" star.
In that case, both the star's diameter and its luminosity greatly increase.
first its called the main sequence star like the sun then it becomes a red giant then it becomes a red super giant and if it is huge a hyper-giant like VY Canis Majoris (largest star known) then it explodes and it becomes a planetary nebula then it becomes a white dwarf
A main sequence star with a spectral calss of G2V or yellow dwarf.