Figure 10-14The Mass–Luminosity Relationship (a) For main-sequence stars, mass and luminosity are directly correlated—the more massive a star, the more luminous it is. A main-sequence star of mass 10 M_⊙ has roughly 3000 times the Sun’s luminosity (3000 L_⊙); one with 0.1 M_⊙ has a luminosity of only about 0.001 L_⊙. To fit the whole sequence on one page, the luminosities and masses are plotted using logarithmic scales. (b) Equivalently, on this H-R diagram, each dot represents a main-sequence star. The number next to each dot is the mass of that star in solar masses (M_⊙). As you move up the main sequence from the lower right to the upper left, the mass, luminosity, and surface temperature of main-sequence stars all increase.