Different “types” of H-R diagrams
Hertzsprung-Russell diagram will appear over and over again in class
Deviations from patterns useful for understanding evolution of stars
Equivalent kinds of plots:
Luminosity vs. Temperature  (what we’ve been showing)
Absolute Magnitude  vs. Spectral Type   (the “original” H-R diagram)
Apparent Magnitude vs. Spectral Type
Patterns still the same if all stars are at same difference
All stars will be shifted vertically by the same amount:
m-M= -5 + 5 log(d)
Magnitude vs. Color   (called “color-magnitude diagrams”)