The study of the architecture of planetary systems, and in particular that of the spin-orbit angle (which is the inclination of the planetary orbit with respect to the stellar rotation axis) can unveil important details on the dynamical evolution of planetary systems. In particular, young planets typically migrate radially, changing their distance to the host star and interacting with the
To date (October 2019), 4073 exoplanets have been confirmed, while 4495 are still candidates. The vast majority of these exoplanets have been discovered with two techniques: the analysis of transits (e.g.: measuring the decline of stellar luminosity during the passage of the planets in across the stellar disk) and radial velocity (by detecting, thanks to the Doppler effect and spectroscopic
