Isochrones in the HR diagram for five different ages as labeled in Gyr next to the last model of the isochrones (displayed in thick black lines). Also shown in gray are the evolutionary tracks for initial masses from 0.8 to 2.6 M_⊙ as labeled next to the ZAMS models of the tracks. The main sequences of the evolutionary tracks are shown in dark gray and the post-MS phases in light gray. Isochrones and tracks are at Z_init = 0.014.