Red supergiant
A red supergiant (RSG) is a larger and brighter type of red giant star. Red supergiants are often variable stars. They are between 100 to 1,600 times bigger than the Sun. Examples of a red supergiant star include Antares, 119 Tauri, Betelgeuse, and VV Cephei A. Most red supergiant stars explode as supernovae. Some of the brightest become Wolf-Rayet stars before they explode.