Red Giants

1. If there is sufficient mass to overcome electron degenerate pressure, the star will continue to compress and heat up. 
2. Eventually, there will be enough heat to cause the Helium in the core to ignite creating a red giant. 
 a. A hydrogen shell will still be present around the core, which will also undergo fusion. 
 b. The energy release here will push outward and cool. 
 c. The visible outer layers of these stars are much larger and cooler than a main sequence star.
 d. Because of its large size, and the redder colors emitted from cooler gasses, they are called "Red Giants".
3. Larger stars will progress to burning Neon, Oxygen and Silicon. 


Nuetron  Degeneracy