Transcript: The Sun is a typical main sequence star by which astronomers mean that the Suns properties lie in the middle of the range of stellar properties on the main sequence. It’s intermediate in mass, in size, in temperature, and luminosity compared to the most and least massive main sequence stars. The Sun has a spectral type G2 which gives it a photosphere temperature of fifty-seven hundred Kelvin. Spectral types O, B, A, F, G, K, and M are subdivided on a decimal scale running from O1 to O8 to O9 to B0, B1, etcetera. The Sun as a G2 star is a little cooler than a G0 star. The Sun is typical in most properties, but most stars are less massive than the Sun and the very highest mass main sequence stars are extremely rare.