Red supergiant
Red supergiants are stars with a supergiant luminosity class and a stellar classification K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous. Wikipedia
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Description: A red supergiant is a star that has a comparatively cool surface but a radius typically several hundred or even thousands of times that of a ...
Short Summary. Red supergiants are aging giant stars that have consumed their core's supply of hydrogen fuel. Helium has accumulated in their core, ...
An extremely large red giant star with a minimum of 15 solar masses. The best known red supergiant is Betelgeuse, with a luminosity about 10,000 times that ...