| 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. |