hertzprung-russel diagram, scatter plot of start diagram. main sequence stars, hypergiants, giants, dwarf stars

antares arcturus asteroid astrology astronomy astrophysics background betelgeuse celestial classification concept cosmos decorative diagram drawing dwarfs education galaxy glob hertzsprung history jupiter kelvin luminosities main mercury moon neptune object orbit outer planet realistic rigel saturn science sequence sky space star stellar sun threedimensional universe uranus white