Mass–density and mass–radius data from the PlanetS catalog and the derived relations. Top: mass and density data of exoplanets from PlanetS catalog. The mass–density relation is represented by a solid black line. The dashed lines show the position of the breakpoints. The light shaded areas are the corresponding 1σ uncertainties. Bottom: mass versus radius distribution with best fit for relation and breakpoints in black, as in Fig. 1. The orange solid and dashed lines show the mass-radius relation and the corresponding breakpoints derived from the fit to the mass-density distribution.