The Hertzsprung-Russell (H-R)diagram (see figure below)is a graph of:

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The H-R diagram is a graph of luminosity (brightness) versus surface temperature for stars. Mass is often inferred from the position of a star on the diagram, but it is not directly plotted. Size is also not plotted, although it can be inferred from the position of a star on the diagram in conjunction with other information. Spectral type is related to surface temperature, but the H-R diagram is not a plot of mass versus spectral type.

The Hertzsprung-Russell (H-R)diagram (See Figure Below)is a Graph Of