Unformatted text preview: 4. Protostar becomes a main sequence star when core grows hot enough to fuse Hydrogen into Helium 5. Energy makes the star brighter-> heat creates swellings and the surface becomes cooler--> Red Giant 6. Planetary Nebula 7. White dwarfs may collapse and explode in a supernova...
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- Spring '08
- Stellar Evolution, Supernova, gradual contraction