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Hertzsprung-Russell diagram
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| Hertz·sprung-Rus·sell di·a·gram [ hùrts sprung rúss'l d ə gram ] (plural Hertz·sprung-Rus·sell di·a·grams) |
noun |
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| Definition: |
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star graph of brightness against color: a graph that plots the brightness of stars against their spectral type or color
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| [After Ejnar Hertzsprung (1873-1967), Danish astronomer, and Henry Norris Russell (1877-1957), U.S. astronomer, who independently devised it] |
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