Spectral Class O, the brightest star, The hottest star in spectral class O, The brightest star in Spectral class M, The brightest white star, The dimmest star of all listed, The brightest white dwarf, The dimmest main-sequence star in spectral class B, The coolest giant star, The brightest giant star in spectral class K, The brightest supergiant in spectral class G, The dimmest star in spectral class M, A white dwarf star that is about 6,000 degrees, not the dimmest star .

Label These...HR Diagram

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