The Hertzsprung Russell Diagram

The Hertzsprung Russell Diagram. Below the main sequence (and slightly to the left) are the White Dwarfs. The Hertzsprung-Russell diagram (HR diagram) is one of the most important tools in the study of stellar evolution.

Shining Light on the Stars: The Hertzsprung-Russell Diagram
Shining Light on the Stars: The Hertzsprung-Russell Diagram (Dollie Dixon)
In attempting to make sense of data and see if two quantities are related we can plot them and seek trends. The Hertzsprung-Russell diagram helps astronomers understand something about a star's evolutionary stage through its brightness and temperature. Below the main sequence (and slightly to the left) are the White Dwarfs.

If you look carefully at stars in the sky, you'll see that they aren't all the same color.

It's generally used to understand a star's age.

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The luminosity is noted both in multiples of the Sun's luminosity and absolute magnitude. Many scientific discoveries are made first theoretically and then proven to be correct, or nearly so, in the laboratory. The Hertzsprung-Russell diagram is a scatterplot showing absolute luminosities of stars against its effective temperature or color.

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