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Hertzsprung-Russell (H-R) Diagram
Graph that plots a star's temperature and spectral type against its luminosity and brightness, providing a complete typology and evolutionary chart. Most stars are "main sequence stars," and form the classic diagonal sequence on the diagram. Giants and Supergiants are above the main sequence, and white dwarfs are below it.
 
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Development Notes
Text by M. Alan Kazlev
Initially published on 07 November 2001.

 
 
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