Architecture of planetary systems in comparison with the Solar System. The sizes of stars and planets are schematically drawn and not to scale. Left panel: planetary systems in which both exoplanets and debris disks have been detected. The letters correspond to the planets in the Solar System. Question mark indicates a candidate planet in the HD 114082 system. Right panel: the same planetary systems are shown, but with radial positions re-scaled in terms of irradiance. The blue vertical line marks the location where the stellar flux is I_⋆ = 1 I_⊕, corresponding to Earth’s solar irradiance.