Lecture 3

1. Life on the main sequence

a. Hydrogen fusion

b. Hydrostatic equilibrium

c. Main sequence lifetime

d. Internal chemical composition changes

e. Pressure-temperature thermostat

2. Post-main sequence evolution

a. Helium fusion

b. Electron degeneracy

c. Helium flash

d. Horizontal branch

3. Depicting stellar evolution on H-R diagram

4. Variable stars

a. RR Lyrae

b. Cepheid variables

a. Period-luminosity relationship for Cepheids