H-R Diagram · Earth and Space Sciences Reference Tables (ESSRT)
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The H-R Diagram (Hertzsprung–Russell diagram) from the Reference Tables for Earth and Space Sciences (ESSRT) plots the luminosity of stars against their surface temperature. It primarily supports HS-ESS1-3.
What the H-R Diagram shows
Luminosity is given in solar units and surface temperature in kelvins, with spectral class (O, B, A, F, G, K, M) and color from blue to red along the bottom. The diagram shows where the main sequence, giants, supergiants and white dwarfs fall and places well-known stars on it, including the Sun, Sirius, Polaris, Rigel and Betelgeuse. Diagonal lines mark stellar size from 10−3 to 103 solar radii, labels along the main sequence give stellar lifetimes from 107 to 1011 years, and an arrow at the right shows mass increasing toward the top.