  The shape of the local bubble is modeled in the framework of the thin layer
approximation. The asymmetric shape of the local bubble is simulated by
introducing axial profiles for the density of the interstellar medium, such as
exponential, Gaussian, inverse square dependence and Navarro--Frenk--White. The
availability of some observed asymmetric profiles for the local bubble allows
us to match theory and observations via the observational percentage of
reliability. The model is compatible with the presence of radioisotopes on
Earth.
