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Diagrama H-R:estrel<strong>las</strong> Hiparcos (1000pc)Secuencia Principal:Banda diagonal, <strong>de</strong>s<strong>de</strong> estrel<strong>las</strong>brillantes calientes hastadébiles y frías:T ef = T sup [30,000-3,000 k] factor 102000 estrel<strong>las</strong> m