: Astronomie: blue supergiant

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blue supergiant

A blue supergiant (BSG) is a hot, luminous star, often referred to as an OB supergiant. They have luminosity class I and spectral class B9 or earlier. Blue supergiants are found towards the top left of the Hertzsprung–Russell diagram, above and to the right of the main sequence. They are larger than the Sun but smaller than a red supergiant, with surface temperatures of 10,000–50,000 K and luminosities from about 10,000 to a million times that of the Sun. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Blue_supergiant)

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