white supergiant

  1. A rare type of extremely bright supergiant with surface temperature of around 10,000°K. Deneb, one of the brightest stars in the Milky Way, is a white supergiant; it has luminosity approximately 60,000 times that of the Sun.

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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.