Distributions of Planetary Systems Dynamics

To date 20 planetary systems have been discovered with multiple planetary mass companions. These new systems show a wide range of orbits, many unexpected. I will describe emerging distributions among these systems and our Solar System. In particular I will discuss the frequency of mean motion resonances, modes of apsidal oscillation, and the dynamical "packing" of these systems. Although the dynamical interactions among planets may be subtle and/or complicated, their distributions are already beginning to point to important features of planet formation, and the likelihood of life on other planets.