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Author: WikiMatrix
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English[en]
Modern observational versions of the chart replace spectral type by a color index (in diagrams made in the middle of the 20th Century, most often the B-V color) of the stars.
Chinese[zh]
現代觀測版本的圖表將光譜類型替換成色指數(在20世紀的圖表中,最常見的是恆星的B-V色指數)。