The Sun, classified as a G-type main-sequence star (G dwarf), has a surface temperature of about 5,500 degrees Celsius and a luminosity of 1 solar unit. Compared to other main-sequence stars, the Sun is relatively average; hotter stars, like O and B types, exhibit much higher temperatures and luminosities, while cooler stars, such as K and M types, have lower temperatures and luminosities. Overall, the main sequence shows a correlation where higher temperatures correspond to greater luminosity, with the Sun positioned in the middle of this range.
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