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What does an H-R Diagram show?

diagram h-r
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What does an H-R Diagram show?

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The Hertzsprung-Russell diagram plots the temperature of stars against their luminosity (the theoretical H-R diagram), or the colour of stars (or spectral type) against their absolute magnitude (the observational H-R diagram, also known as a colour-magnitude diagram). Create your own Colour Magnitude Diagram using our Star Clusters Photometry module. Further information on the H-R diagram at COSMOS. Image credit: R.

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