The seven spectral classes are identified with the letters O, B, A, F, G, K and M. O describes stars with a temperature of 50,000 Kelvin that are red. At half the temperature, stars that are yellow are classified with B. Next up, is A which includes stars with a surface temperature of 10,000 Kelvin that are orange. White stars that have a temperature of 8,000 degrees are identified with the letter F. Stars with the spectral class of G are 6000 Kelvin and either white or blue. The final 2 letters, K and M, both include stars that are blue, but stars in the spectral class of K are 4000 Kelvin while stars in the spectral class of M are 3000 Kelvin. When looking at the Hertzsprung-Russell Diagram, the way the spectral class bar is arranged may be confusing since the temperature goes from highest on the left-hand side of the x-axis to lowest on the
The seven spectral classes are identified with the letters O, B, A, F, G, K and M. O describes stars with a temperature of 50,000 Kelvin that are red. At half the temperature, stars that are yellow are classified with B. Next up, is A which includes stars with a surface temperature of 10,000 Kelvin that are orange. White stars that have a temperature of 8,000 degrees are identified with the letter F. Stars with the spectral class of G are 6000 Kelvin and either white or blue. The final 2 letters, K and M, both include stars that are blue, but stars in the spectral class of K are 4000 Kelvin while stars in the spectral class of M are 3000 Kelvin. When looking at the Hertzsprung-Russell Diagram, the way the spectral class bar is arranged may be confusing since the temperature goes from highest on the left-hand side of the x-axis to lowest on the