I'm an astrophysics professor at the University of Toronto. I'm interested in the dynamics of planets and Saturn's rings. I'm one of the developers of the REBOUND N-body Code. I'm also the developer of the iOS Exoplanet App.
Oh dear! I'm just an armchair space enthusiast, but my understanding of n-body is that it's just plain evil black-magic. I'm glad it exists, but ... wow. Evil. Pure evil.