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Simplified Hertzsprung-Russell Diagram (HRD)



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Simplified Hertzsprung-Russell Diagram (HRD)
Download this image: Hi-Res JPEG (0.4 MB)
The spectral class (or surface temperature) of stars is plotted on the horizontal axis of the diagram and the absolute brightness (or luminosity) of stars is plotted on its vertical axis. Our Sun lies in the Main Sequence

Credit: GFDL.