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h-r diagram

noun Astronomy.

Hertzsprung-Russell diagram.

The Hertzsprung-Russell diagram the various stages of stellar evolution. By far the most prominent feature is the main sequence (grey), which runs from the — Hertzsprung-Russell Diagram | COSMOS

An observational Hertzsprung–Russell diagram with 22,000 stars plotted from the Hipparcos Catalogue and 1,000 from the Gliese Catalogue of nearby stars. — Hertzsprung–Russell diagram – Wikipedia

Interpreting the HR Diagram — Using the HR Diagram

An HR diagram showing many well known stars in the Milky Way galaxy. — Hertzsprung–Russell diagram – Wikipedia

http://Traveller Location/spacebook/h-r-diagram/ — What is the Hertzsprung-Russell diagram and why is it so important

HR Diagram — HR Diagrams

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