In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics..
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Supergiant Supergiants are the most massive stars. Supergiants can have masses from 10 to 70 solar masses and brightness from 30,000 up to hundreds of thousands ... >
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Red giant A red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler giant stars. ... >
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Red supergiant star Red supergiants are supergiant stars of spectral type K-M and a luminosity class of I. They are the largest stars in the universe in terms of ... >
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Blue supergiant star Blue supergiants are supergiant stars (class I) of spectral type O. They are extremely hot and bright, with surface temperatures of between 20,000 - ... >
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