Mass–radius relation for near (left panel) and far (right panel) exoplanets at different ages: 10 Myr (red dots), 0.5 Gyr (green dots), 1.5 Gyr (yellow dots), 2.5 Gyr (blue dots), 3.5 Gyr (purple dots), and 4.5 Gyr (light blue dots). In both panels, black lines refer to the evolutionary paths followed by three planets with initial masses M_P = 0.6 M_J ( erg s⁻¹), 1 M_J ( erg s⁻¹), and 1.2 M_J ( erg s⁻¹) and orbital period 1.7 days.