the star is unable to generate heat when it runs out of hydrogen in its core leading to its contraction and expansion. It cools down and glows red. The helium fused into Carbon. The star is now a RED GIANT.
1. Stellar nebula
2. Prostar
3. Sequence star
4. Super Red giant
5. Supernova
6. Neutron star
7. Black hole
8. Red giant
9. White dwarf
10. Black dwarf
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