The Sun is classified as a G-type main-sequence star (G2V). Its luminosity is used as a reference point to compare other stars. Stars can have luminosities ranging from a fraction of the Sun's to several million times greater. For example:
Red Dwarfs: These stars have lower luminosities, often less than 0.1 L☉. Supergiants: Stars like Betelgeuse can have luminosities up to 100,000 L☉ or more.
