The surprising diversity of exoplanet orbital parameters shows that the architecture of many extrasolar systems is remarkably different from that of the solar system.

The wider distribution of eccentricity of the planets detected, the existence of hot Jupiters, the strong spin-orbit misalignment of a significant fraction of them and the evidence of mutually inclined orbits (e.g. υ Andromedae) are several features that appear to be at odds with the formation of the solar system.

These observations place new constraints on theories of planet formation. Our studies focus on the late gas phase, where interactions between planets and their natal protoplanetary disk play an important role in planetary system formation.