DIAGRAM OF THE DIFFERENT STARS: The Hertzsprung-Russel Diagram of star color and temperature. Courtesy of the European Space Agency and modified by the column author. The color of stars has been noted ...
Stellar spectral classification utilizes seven main classes (O, B, A, F, G, K, M), ordered by decreasing surface temperature, with each class further subdivided into numerical subclasses (0-9) ...
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