Evolution in time of a simulation corresponding to a 0.025 M_⊙ disk around a M0-type star. Planetary embryos are plotted as circles following the color scale that represents the fraction of water with respect to their total masses. The blue and light blue shaded areas represent the conservative and optimistic HZ, respectively. Moreover, the blue and light blue curves represent curves of constant perihelion and aphelion, both for the conservative and optimistic HZ. In this case, a planet is formed in the HZ with a mass of 0.28 M_⊕ and a water content of 26.7% by mass, which is equal to 267 EOs.