Hertzsprung-Russell diagram

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Hertz·sprung-Rus·sell diagram

 (hĕrts′sprŭng-rŭs′əl)
n.
A graph of the absolute magnitudes or luminosities of stars plotted against their surface temperatures or colors, used to classify stars by their evolutionary stages.

[After Ejnar Hertzsprung (1873-1967), Danish astronomer, and Henry Norris Russell.]

Hertzsprung-Russell diagram

(ˈhɜːtssprʌŋˈrʌsəl)
n
(Astronomy) a graph in which the spectral types of stars are plotted against their absolute magnitudes. Stars fall into different groupings in different parts of the graph. See also main sequence
[C20: named after Ejnar Hertzsprung and Henry Norris Russell]

Hertz·sprung-Rus·sell diagram

(hĕrts′spro͝ong-rŭs′əl)
A graph of the natural brightness of stars plotted against their surface temperature or color. It is used in the study of the life cycles of stars.
References in periodicals archive ?
Then they plotted the color and brightness of each star, resulting in a diagram referred to as a color-magnitude diagram.
Beyond that point, chapter by chapter, he leapfrogs his prehistoric report by orders of magnitude of years, tackling potassium-argon dating and the ages of fossil hominids, molecular dating and divergence times for mammalian lineages, meteorites and the age of the solar system, and the use of color-magnitude diagrams for assessing ages of collections of stars.
9m telescope and suitable teriary candidates will be identified on color-magnitude diagrams.