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red supergiant

red supergiant in Science
red supergiant  
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 of the Sun. When a supergiant collapses into a supernova, it may result in either a neutron star or a black hole.
The American HeritageĀ® Science Dictionary
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