A highly luminous evolved star, associated with luminosity class I. Its location in a Hertzsprung-Russell diagram is distinct from the low-luminosity, compact white dwarf region.
A cool, highly luminous evolved massive star with an extended envelope, generally later than its initial hot main sequence stage. Its eventual core-collapse outcome depends on the core, winds, mixing and binary history, not on its red colour alone.
Articles by others on the same topic
"Supergiant" can refer to a couple of different concepts, primarily in the contexts of astrophysics and gaming: 1. **Astrophysics**: In astronomy, a supergiant is a very large and luminous star that is much brighter and more massive than the Sun. Supergiants are typically classified as spectral types O, B, A, or F and can have diameters up to 1,000 times that of the Sun.