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Hertzsprung-Russell diagram: Quick Facts

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Facts

Also Known As H-R diagram

Photos and Videos

A Hertzsprung-Russell diagram plotting stars by absolute magnitude and spectral type, showing regions for main sequence stars, white dwarfs, giants, and supergiants, with color gradients from blue (hot and bright) to red (cool and dim). The Sun is marked along the main sequence.
Hertzsprung-Russell diagram of solar neighbourhood
A Hertzsprung-Russell diagram plots absolute visual magnitude against color index for Population II stars in a globular cluster, highlighting regions for horizontal branch, red giants, lower main sequence, blue stragglers, and the RR Lyrae gap. Spectral classes B through M are marked along the top axis.
Learn about the different types of stars categorized according to their mass and temperature - red dwarfs, red giants, supergiants, white, and brown dwarf stars
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Key People

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Henry Norris Russell
American astronomer

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